From 7be21f60469f611f3b3327b336699caaed4bbec1 Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Mon, 28 Aug 2017 13:26:11 -0700
Subject: [PATCH 01/17] First (untested) pass at handling GL Style Spec filters

---
 Makefile      |   2 +-
 README.md     |   1 +
 evaluator.cpp | 196 ++++++++++++++++++++++++++++++++++++++++++++++++++
 evaluator.hpp |  11 +++
 tile-join.cpp |  74 +++++++++++++++++--
 5 files changed, 276 insertions(+), 8 deletions(-)
 create mode 100644 evaluator.cpp
 create mode 100644 evaluator.hpp

diff --git a/Makefile b/Makefile
index f83ccb1d..c3f0e795 100644
--- a/Makefile
+++ b/Makefile
@@ -55,7 +55,7 @@ tippecanoe-enumerate: enumerate.o
 tippecanoe-decode: decode.o projection.o mvt.o write_json.o
 	$(CXX) $(PG) $(LIBS) $(FINAL_FLAGS) $(CXXFLAGS) -o $@ $^ $(LDFLAGS) -lm -lz -lsqlite3
 
-tile-join: tile-join.o projection.o pool.o mbtiles.o mvt.o memfile.o dirtiles.o jsonpull/jsonpull.o text.o
+tile-join: tile-join.o projection.o pool.o mbtiles.o mvt.o memfile.o dirtiles.o jsonpull/jsonpull.o text.o evaluator.o
 	$(CXX) $(PG) $(LIBS) $(FINAL_FLAGS) $(CXXFLAGS) -o $@ $^ $(LDFLAGS) -lm -lz -lsqlite3 -lpthread
 
 unit: unit.o text.o
diff --git a/README.md b/README.md
index d8f197a9..63d9344c 100644
--- a/README.md
+++ b/README.md
@@ -482,6 +482,7 @@ The options are:
 
  * `-x` *key* or `--exclude=`*key*: Remove attributes of type *key* from the output. You can use this to remove the field you are matching against if you no longer need it after joining, or to remove any other attributes you don't want.
  * `-i` or `--if-matched`: Only include features that matched the CSV.
+ * `-J` *filter-file* or `--gl-filter-file`=*filter-file*: Check features against a per-layer filter (as defined in the [Mapbox GL Style Specification](https://www.mapbox.com/mapbox-gl-js/style-spec/#types-filter)) and only include those that match.
 
 ### Setting or disabling tile size limits
 
diff --git a/evaluator.cpp b/evaluator.cpp
new file mode 100644
index 00000000..1da97788
--- /dev/null
+++ b/evaluator.cpp
@@ -0,0 +1,196 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <map>
+#include "mvt.hpp"
+#include "evaluator.hpp"
+
+int compare(mvt_value one, json_object *two, bool &fail) {
+	if (one.type == mvt_string) {
+		if (two->type != JSON_STRING) {
+			fail = true;
+			return false; // string vs non-string
+		}
+
+		return strcmp(one.string_value.c_str(), two->string);
+	}
+
+	if (one.type == mvt_double || one.type == mvt_float || one.type == mvt_int || one.type == mvt_uint || one.type == mvt_sint) {
+		if (two->type != JSON_NUMBER) {
+			fail = true;
+			return false; // number vs non-number
+		}
+
+		double v;
+		if (one.type == mvt_double) {
+			v = one.numeric_value.double_value;
+		} else if (one.type == mvt_float) {
+			v = one.numeric_value.float_value;
+		} else if (one.type == mvt_int) {
+			v = one.numeric_value.int_value;
+		} else if (one.type == mvt_uint) {
+			v = one.numeric_value.uint_value;
+		} else if (one.type == mvt_sint) {
+			v = one.numeric_value.sint_value;
+		} else {
+			fprintf(stderr, "Internal error: bad mvt type %d\n", one.type);
+			exit(EXIT_FAILURE);
+		}
+
+		if (v < two->number) {
+			return -1;
+		} else if (v > two->number) {
+			return 1;
+		} else {
+			return 0;
+		}
+	}
+
+	if (one.type == mvt_bool) {
+		if (two->type != JSON_TRUE && two->type != JSON_FALSE) {
+			fail = true;
+			return false; // bool vs non-bool
+		}
+
+		bool b = two->type = JSON_TRUE;
+		return one.numeric_value.bool_value > b;
+	}
+
+	fprintf(stderr, "Internal error: bad mvt type %d\n", one.type);
+	exit(EXIT_FAILURE);
+}
+
+bool eval(std::map<std::string, mvt_value> const &feature, json_object *f) {
+	if (f == NULL || f->type != JSON_ARRAY) {
+		fprintf(stderr, "Filter is not an array: %s\n", json_stringify(f));
+		exit(EXIT_FAILURE);
+	}
+
+	if (f->length < 2) {
+		fprintf(stderr, "Array too small in filter: %s\n", json_stringify(f));
+		exit(EXIT_FAILURE);
+	}
+
+	if (f->array[0]->type != JSON_STRING) {
+		fprintf(stderr, "Filter operation is not a string: %s\n", json_stringify(f));
+		exit(EXIT_FAILURE);
+	}
+
+	if (strcmp(f->array[0]->string, "has") == 0) {
+		if (f->array[1]->type != JSON_STRING) {
+			fprintf(stderr, "\"has\" key is not a string: %s\n", json_stringify(f));
+			exit(EXIT_FAILURE);
+		}
+		return feature.count(std::string(f->array[1]->string)) != 0;
+	}
+
+	if (strcmp(f->array[0]->string, "!has") == 0) {
+		if (f->array[1]->type != JSON_STRING) {
+			fprintf(stderr, "\"!has\" key is not a string: %s\n", json_stringify(f));
+			exit(EXIT_FAILURE);
+		}
+		return feature.count(std::string(f->array[1]->string)) == 0;
+	}
+
+	if (strcmp(f->array[0]->string, "==") == 0 ||
+	    strcmp(f->array[0]->string, "!=") == 0 ||
+	    strcmp(f->array[0]->string, ">") == 0 ||
+	    strcmp(f->array[0]->string, ">=") == 0 ||
+	    strcmp(f->array[0]->string, "<") == 0 ||
+	    strcmp(f->array[0]->string, "<=") == 0) {
+		if (f->length < 3) {
+			fprintf(stderr, "Array too small in filter: %s\n", json_stringify(f));
+			exit(EXIT_FAILURE);
+		}
+		if (f->array[1]->type != JSON_STRING) {
+			fprintf(stderr, "\"!has\" key is not a string: %s\n", json_stringify(f));
+			exit(EXIT_FAILURE);
+		}
+
+		auto ff = feature.find(std::string(f->array[1]->string));
+		if (ff == feature.end()) {
+			return false; // not found: comparison is false
+		}
+
+		bool fail = false;
+		int cmp = compare(ff->second, f->array[2], fail);
+
+		if (fail) {
+			return false;
+		}
+
+		if (strcmp(f->array[0]->string, "==") == 0) {
+			return cmp == 0;
+		}
+		if (strcmp(f->array[0]->string, "!=") == 0) {
+			return cmp != 0;
+		}
+		if (strcmp(f->array[0]->string, ">") == 0) {
+			return cmp > 0;
+		}
+		if (strcmp(f->array[0]->string, ">=") == 0) {
+			return cmp >= 0;
+		}
+		if (strcmp(f->array[0]->string, "<") == 0) {
+			return cmp < 0;
+		}
+		if (strcmp(f->array[0]->string, "<=") == 0) {
+			return cmp <= 0;
+		}
+
+		fprintf(stderr, "Internal error: can't happen: %s\n", json_stringify(f));
+		exit(EXIT_FAILURE);
+	}
+
+	if (strcmp(f->array[0]->string, "all") == 0 ||
+	    strcmp(f->array[0]->string, "any") == 0 ||
+	    strcmp(f->array[0]->string, "none") == 0) {
+		bool v;
+
+		if (strcmp(f->array[0]->string, "all") == 0) {
+			v = true;
+		} else {
+			v = false;
+		}
+
+		for (size_t i = 1; i < f->length; i++) {
+			bool out = eval(feature, f->array[i]);
+
+			if (strcmp(f->array[0]->string, "all") == 0) {
+				v = v && out;
+			} else {
+				v = v || out;
+			}
+		}
+
+		if (strcmp(f->array[0]->string, "none") == 0) {
+			return !v;
+		} else {
+			return v;
+		}
+	}
+
+	fprintf(stderr, "Unknown filter %s\n", json_stringify(f));
+	exit(EXIT_FAILURE);
+}
+
+bool evaluate(std::map<std::string, mvt_value> const &feature, std::string const &layer, json_object *filter) {
+	json_object *layers = json_hash_get(filter, "layers");
+
+	if (layers == NULL) {
+		fprintf(stderr, "Filter: no \"layers\" key at top level\n");
+		exit(EXIT_FAILURE);
+	}
+
+	if (layers->type != JSON_HASH) {
+		fprintf(stderr, "Filter: \"layers\" is not a hash\n");
+		exit(EXIT_FAILURE);
+	}
+
+	json_object *f = json_hash_get(layers, layer.c_str());
+
+	if (f != NULL) {
+		return eval(feature, f);
+	} else {
+		return true; // no filter for this layer;
+	}
+}
diff --git a/evaluator.hpp b/evaluator.hpp
new file mode 100644
index 00000000..8c3b25bc
--- /dev/null
+++ b/evaluator.hpp
@@ -0,0 +1,11 @@
+#ifndef EVALUATOR_HPP
+#define EVALUATOR HPP
+
+#include <map>
+#include <string>
+#include "jsonpull/jsonpull.h"
+#include "mvt.hpp"
+
+bool evaluate(std::map<std::string, mvt_value> const &feature, std::string const &layer, json_pull *filter);
+
+#endif
diff --git a/tile-join.cpp b/tile-join.cpp
index aee4f3c6..5a0422b3 100644
--- a/tile-join.cpp
+++ b/tile-join.cpp
@@ -45,7 +45,7 @@ struct stats {
 	double minlat, minlon, maxlat, maxlon;
 };
 
-void handle(std::string message, int z, unsigned x, unsigned y, std::map<std::string, layermap_entry> &layermap, std::vector<std::string> &header, std::map<std::string, std::vector<std::string>> &mapping, std::set<std::string> &exclude, std::set<std::string> &keep_layers, std::set<std::string> &remove_layers, int ifmatched, mvt_tile &outtile) {
+void handle(std::string message, int z, unsigned x, unsigned y, std::map<std::string, layermap_entry> &layermap, std::vector<std::string> &header, std::map<std::string, std::vector<std::string>> &mapping, std::set<std::string> &exclude, std::set<std::string> &keep_layers, std::set<std::string> &remove_layers, int ifmatched, mvt_tile &outtile, json_object *filter) {
 	mvt_tile tile;
 	int features_added = 0;
 	bool was_compressed;
@@ -99,6 +99,39 @@ void handle(std::string message, int z, unsigned x, unsigned y, std::map<std::st
 
 		for (size_t f = 0; f < layer.features.size(); f++) {
 			mvt_feature feat = layer.features[f];
+
+			if (filter != NULL) {
+				std::map<std::string, mvt_value> attributes;
+
+				for (size_t t = 0; t + 1 < feat.tags.size(); t += 2) {
+					std::string key = layer.keys[feat.tags[t]];
+					mvt_value &val = layer.values[feat.tags[t + 1]];
+
+					attributes.insert(std::pair<std::string, mvt_value>(key, val));
+				}
+
+				if (feat.has_id) {
+					mvt_value v;
+					v.type = mvt_uint;
+					v.numeric_value.uint_value = feat.id;
+
+					attributes.insert(std::pair<std::string, mvt_value>("$id", v));
+				}
+
+				mvt_value v;
+				v.type = mvt_string;
+
+				if (feat.type == mvt_point) {
+					v.string_value = "Point";
+				} else if (feat.type == mvt_linestring) {
+					v.string_value = "LineString";
+				} else if (feat.type == mvt_polygon) {
+					v.string_value = "Polygon";
+				}
+
+				attributes.insert(std::pair<std::string, mvt_value>("$type", v));
+			}
+
 			mvt_feature outfeature;
 			int matched = 0;
 
@@ -563,6 +596,7 @@ struct arg {
 	std::set<std::string> *keep_layers;
 	std::set<std::string> *remove_layers;
 	int ifmatched;
+	json_object *filter;
 };
 
 void *join_worker(void *v) {
@@ -572,7 +606,7 @@ void *join_worker(void *v) {
 		mvt_tile tile;
 
 		for (size_t i = 0; i < ai->second.size(); i++) {
-			handle(ai->second[i], ai->first.z, ai->first.x, ai->first.y, *(a->layermap), *(a->header), *(a->mapping), *(a->exclude), *(a->keep_layers), *(a->remove_layers), a->ifmatched, tile);
+			handle(ai->second[i], ai->first.z, ai->first.x, ai->first.y, *(a->layermap), *(a->header), *(a->mapping), *(a->exclude), *(a->keep_layers), *(a->remove_layers), a->ifmatched, tile, a->filter);
 		}
 
 		ai->second.clear();
@@ -606,7 +640,7 @@ void *join_worker(void *v) {
 	return NULL;
 }
 
-void handle_tasks(std::map<zxy, std::vector<std::string>> &tasks, std::vector<std::map<std::string, layermap_entry>> &layermaps, sqlite3 *outdb, const char *outdir, std::vector<std::string> &header, std::map<std::string, std::vector<std::string>> &mapping, std::set<std::string> &exclude, int ifmatched, std::set<std::string> &keep_layers, std::set<std::string> &remove_layers) {
+void handle_tasks(std::map<zxy, std::vector<std::string>> &tasks, std::vector<std::map<std::string, layermap_entry>> &layermaps, sqlite3 *outdb, const char *outdir, std::vector<std::string> &header, std::map<std::string, std::vector<std::string>> &mapping, std::set<std::string> &exclude, int ifmatched, std::set<std::string> &keep_layers, std::set<std::string> &remove_layers, json_object *filter) {
 	pthread_t pthreads[CPUS];
 	std::vector<arg> args;
 
@@ -620,6 +654,7 @@ void handle_tasks(std::map<zxy, std::vector<std::string>> &tasks, std::vector<st
 		args[i].keep_layers = &keep_layers;
 		args[i].remove_layers = &remove_layers;
 		args[i].ifmatched = ifmatched;
+		args[i].filter = filter;
 	}
 
 	size_t count = 0;
@@ -661,7 +696,7 @@ void handle_tasks(std::map<zxy, std::vector<std::string>> &tasks, std::vector<st
 	}
 }
 
-void decode(struct reader *readers, char *map, std::map<std::string, layermap_entry> &layermap, sqlite3 *outdb, const char *outdir, struct stats *st, std::vector<std::string> &header, std::map<std::string, std::vector<std::string>> &mapping, std::set<std::string> &exclude, int ifmatched, std::string &attribution, std::string &description, std::set<std::string> &keep_layers, std::set<std::string> &remove_layers, std::string &name) {
+void decode(struct reader *readers, char *map, std::map<std::string, layermap_entry> &layermap, sqlite3 *outdb, const char *outdir, struct stats *st, std::vector<std::string> &header, std::map<std::string, std::vector<std::string>> &mapping, std::set<std::string> &exclude, int ifmatched, std::string &attribution, std::string &description, std::set<std::string> &keep_layers, std::set<std::string> &remove_layers, std::string &name, json_object *filter) {
 	std::vector<std::map<std::string, layermap_entry>> layermaps;
 	for (size_t i = 0; i < CPUS; i++) {
 		layermaps.push_back(std::map<std::string, layermap_entry>());
@@ -706,7 +741,7 @@ void decode(struct reader *readers, char *map, std::map<std::string, layermap_en
 
 		if (readers == NULL || readers->zoom != r->zoom || readers->x != r->x || readers->y != r->y) {
 			if (tasks.size() > 100 * CPUS) {
-				handle_tasks(tasks, layermaps, outdb, outdir, header, mapping, exclude, ifmatched, keep_layers, remove_layers);
+				handle_tasks(tasks, layermaps, outdb, outdir, header, mapping, exclude, ifmatched, keep_layers, remove_layers, filter);
 				tasks.clear();
 			}
 		}
@@ -759,7 +794,7 @@ void decode(struct reader *readers, char *map, std::map<std::string, layermap_en
 	st->minlat = min(minlat, st->minlat);
 	st->maxlat = max(maxlat, st->maxlat);
 
-	handle_tasks(tasks, layermaps, outdb, outdir, header, mapping, exclude, ifmatched, keep_layers, remove_layers);
+	handle_tasks(tasks, layermaps, outdb, outdir, header, mapping, exclude, ifmatched, keep_layers, remove_layers, filter);
 	layermap = merge_layermaps(layermaps);
 
 	struct reader *next;
@@ -996,6 +1031,25 @@ void readcsv(char *fn, std::vector<std::string> &header, std::map<std::string, s
 	}
 }
 
+json_object *read_filter(const char *fname) {
+	FILE *fp = fopen(fname, "r");
+	if (fp == NULL) {
+		perror(fname);
+		exit(EXIT_FAILURE);
+	}
+
+	json_pull *jp = json_begin_file(fp);
+	json_object *filter = json_read_tree(jp);
+	if (filter == NULL) {
+		fprintf(stderr, "%s: %s\n", fname, jp->error);
+		exit(EXIT_FAILURE);
+	}
+
+	// XXX clone tree instead of leaving pull open
+	fclose(fp);
+	return filter;
+}
+
 int main(int argc, char **argv) {
 	char *out_mbtiles = NULL;
 	char *out_dir = NULL;
@@ -1003,6 +1057,7 @@ int main(int argc, char **argv) {
 	char *csv = NULL;
 	int force = 0;
 	int ifmatched = 0;
+	json_object *filter = NULL;
 
 	CPUS = sysconf(_SC_NPROCESSORS_ONLN);
 
@@ -1039,6 +1094,7 @@ int main(int argc, char **argv) {
 		{"quiet", no_argument, 0, 'q'},
 		{"maximum-zoom", required_argument, 0, 'z'},
 		{"minimum-zoom", required_argument, 0, 'Z'},
+		{"gl-filter-file", required_argument, 0, 'J'},
 
 		{"no-tile-size-limit", no_argument, &pk, 1},
 		{"no-tile-compression", no_argument, &pC, 1},
@@ -1103,6 +1159,10 @@ int main(int argc, char **argv) {
 			minzoom = atoi(optarg);
 			break;
 
+		case 'J':
+			filter = read_filter(optarg);
+			break;
+
 		case 'p':
 			if (strcmp(optarg, "k") == 0) {
 				pk = true;
@@ -1200,7 +1260,7 @@ int main(int argc, char **argv) {
 		*rr = r;
 	}
 
-	decode(readers, csv, layermap, outdb, out_dir, &st, header, mapping, exclude, ifmatched, attribution, description, keep_layers, remove_layers, name);
+	decode(readers, csv, layermap, outdb, out_dir, &st, header, mapping, exclude, ifmatched, attribution, description, keep_layers, remove_layers, name, filter);
 
 	if (set_attribution.size() != 0) {
 		attribution = set_attribution;

From 58782135165fa5e5a931281f3beabbb3cff86345 Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Mon, 28 Aug 2017 13:42:14 -0700
Subject: [PATCH 02/17] Simplify the filter format, and actually run the
 filter.

---
 README.md           |  9 ++++++++-
 evaluator.cpp       | 14 +-------------
 evaluator.hpp       |  2 +-
 jsonpull/jsonpull.c |  4 ++--
 jsonpull/jsonpull.h |  4 ++--
 man/tippecanoe.1    | 12 ++++++++++++
 tile-join.cpp       | 23 +++++++++++++++++++++++
 7 files changed, 49 insertions(+), 19 deletions(-)

diff --git a/README.md b/README.md
index 63d9344c..72fd4b34 100644
--- a/README.md
+++ b/README.md
@@ -482,7 +482,14 @@ The options are:
 
  * `-x` *key* or `--exclude=`*key*: Remove attributes of type *key* from the output. You can use this to remove the field you are matching against if you no longer need it after joining, or to remove any other attributes you don't want.
  * `-i` or `--if-matched`: Only include features that matched the CSV.
- * `-J` *filter-file* or `--gl-filter-file`=*filter-file*: Check features against a per-layer filter (as defined in the [Mapbox GL Style Specification](https://www.mapbox.com/mapbox-gl-js/style-spec/#types-filter)) and only include those that match.
+ * `-j` *filter* or `--gl-filter`=*filter*: Check features against a per-layer filter (as defined in the [Mapbox GL Style Specification](https://www.mapbox.com/mapbox-gl-js/style-spec/#types-filter)) and only include those that match. Any features in layers that have no filter specified will be passed through.
+ * `-J` *filter-file* or `--gl-filter-file`=*filter-file*: Like `-j`, but read the filter from a file.
+
+Example: to find the Natural Earth countries with low `scalerank` but high `LABELRANK`:
+
+```
+tile-join -o filtered.mbtiles -j '{ "ne_10m_admin_0_countries": [ "all", [ "<", "scalerank", 3 ], [ ">", "LABELRANK", 5 ] ] }' ne_10m_admin_0_countries.mbtiles
+```
 
 ### Setting or disabling tile size limits
 
diff --git a/evaluator.cpp b/evaluator.cpp
index 1da97788..48feca7e 100644
--- a/evaluator.cpp
+++ b/evaluator.cpp
@@ -174,19 +174,7 @@ bool eval(std::map<std::string, mvt_value> const &feature, json_object *f) {
 }
 
 bool evaluate(std::map<std::string, mvt_value> const &feature, std::string const &layer, json_object *filter) {
-	json_object *layers = json_hash_get(filter, "layers");
-
-	if (layers == NULL) {
-		fprintf(stderr, "Filter: no \"layers\" key at top level\n");
-		exit(EXIT_FAILURE);
-	}
-
-	if (layers->type != JSON_HASH) {
-		fprintf(stderr, "Filter: \"layers\" is not a hash\n");
-		exit(EXIT_FAILURE);
-	}
-
-	json_object *f = json_hash_get(layers, layer.c_str());
+	json_object *f = json_hash_get(filter, layer.c_str());
 
 	if (f != NULL) {
 		return eval(feature, f);
diff --git a/evaluator.hpp b/evaluator.hpp
index 8c3b25bc..da65a217 100644
--- a/evaluator.hpp
+++ b/evaluator.hpp
@@ -6,6 +6,6 @@
 #include "jsonpull/jsonpull.h"
 #include "mvt.hpp"
 
-bool evaluate(std::map<std::string, mvt_value> const &feature, std::string const &layer, json_pull *filter);
+bool evaluate(std::map<std::string, mvt_value> const &feature, std::string const &layer, json_object *filter);
 
 #endif
diff --git a/jsonpull/jsonpull.c b/jsonpull/jsonpull.c
index ad4d1526..35caac89 100644
--- a/jsonpull/jsonpull.c
+++ b/jsonpull/jsonpull.c
@@ -69,7 +69,7 @@ json_pull *json_begin_file(FILE *f) {
 }
 
 static ssize_t read_string(json_pull *j, char *buffer, size_t n) {
-	char *cp = j->source;
+	const char *cp = j->source;
 	size_t out = 0;
 
 	while (out < n && cp[out] != '\0') {
@@ -81,7 +81,7 @@ static ssize_t read_string(json_pull *j, char *buffer, size_t n) {
 	return out;
 }
 
-json_pull *json_begin_string(char *s) {
+json_pull *json_begin_string(const char *s) {
 	return json_begin(read_string, s);
 }
 
diff --git a/jsonpull/jsonpull.h b/jsonpull/jsonpull.h
index dabeb306..2f44b1d9 100644
--- a/jsonpull/jsonpull.h
+++ b/jsonpull/jsonpull.h
@@ -46,7 +46,7 @@ typedef struct json_pull {
 	int line;
 
 	ssize_t (*read)(struct json_pull *, char *buf, size_t n);
-	void *source;
+	const void *source;
 	char *buffer;
 	ssize_t buffer_tail;
 	ssize_t buffer_head;
@@ -56,7 +56,7 @@ typedef struct json_pull {
 } json_pull;
 
 json_pull *json_begin_file(FILE *f);
-json_pull *json_begin_string(char *s);
+json_pull *json_begin_string(const char *s);
 
 json_pull *json_begin(ssize_t (*read)(struct json_pull *, char *buffer, size_t n), void *source);
 void json_end(json_pull *p);
diff --git a/man/tippecanoe.1 b/man/tippecanoe.1
index b3c0b3e8..4ea75d33 100644
--- a/man/tippecanoe.1
+++ b/man/tippecanoe.1
@@ -566,6 +566,18 @@ The options are:
 \fB\fC\-x\fR \fIkey\fP or \fB\fC\-\-exclude=\fR\fIkey\fP: Remove attributes of type \fIkey\fP from the output. You can use this to remove the field you are matching against if you no longer need it after joining, or to remove any other attributes you don't want.
 .IP \(bu 2
 \fB\fC\-i\fR or \fB\fC\-\-if\-matched\fR: Only include features that matched the CSV.
+.IP \(bu 2
+\fB\fC\-j\fR \fIfilter\fP or \fB\fC\-\-gl\-filter\fR=\fIfilter\fP: Check features against a per\-layer filter (as defined in the Mapbox GL Style Specification \[la]https://www.mapbox.com/mapbox-gl-js/style-spec/#types-filter\[ra]) and only include those that match. Any features in layers that have no filter specified will be passed through.
+.IP \(bu 2
+\fB\fC\-J\fR \fIfilter\-file\fP or \fB\fC\-\-gl\-filter\-file\fR=\fIfilter\-file\fP: Like \fB\fC\-j\fR, but read the filter from a file.
+.RE
+.PP
+Example: to find the Natural Earth countries with low \fB\fCscalerank\fR but high \fB\fCLABELRANK\fR:
+.PP
+.RS
+.nf
+tile\-join \-o filtered.mbtiles \-j '{ "ne_10m_admin_0_countries": [ "all", [ "<", "scalerank", 3 ], [ ">", "LABELRANK", 5 ] ] }' ne_10m_admin_0_countries.mbtiles
+.fi
 .RE
 .SS Setting or disabling tile size limits
 .RS
diff --git a/tile-join.cpp b/tile-join.cpp
index 5a0422b3..11e4f23b 100644
--- a/tile-join.cpp
+++ b/tile-join.cpp
@@ -22,6 +22,7 @@
 #include "mbtiles.hpp"
 #include "geometry.hpp"
 #include "dirtiles.hpp"
+#include "evaluator.hpp"
 #include <fstream>
 #include <sstream>
 #include <algorithm>
@@ -130,6 +131,10 @@ void handle(std::string message, int z, unsigned x, unsigned y, std::map<std::st
 				}
 
 				attributes.insert(std::pair<std::string, mvt_value>("$type", v));
+
+				if (!evaluate(attributes, layer.name, filter)) {
+					continue;
+				}
 			}
 
 			mvt_feature outfeature;
@@ -1050,6 +1055,19 @@ json_object *read_filter(const char *fname) {
 	return filter;
 }
 
+json_object *parse_filter(const char *s) {
+	json_pull *jp = json_begin_string(s);
+	json_object *filter = json_read_tree(jp);
+	if (filter == NULL) {
+		fprintf(stderr, "Could not parse filter %s\n", s);
+		fprintf(stderr, "%s\n", jp->error);
+		exit(EXIT_FAILURE);
+	}
+
+	// XXX clone tree instead of leaving pull open
+	return filter;
+}
+
 int main(int argc, char **argv) {
 	char *out_mbtiles = NULL;
 	char *out_dir = NULL;
@@ -1095,6 +1113,7 @@ int main(int argc, char **argv) {
 		{"maximum-zoom", required_argument, 0, 'z'},
 		{"minimum-zoom", required_argument, 0, 'Z'},
 		{"gl-filter-file", required_argument, 0, 'J'},
+		{"gl-filter", required_argument, 0, 'j'},
 
 		{"no-tile-size-limit", no_argument, &pk, 1},
 		{"no-tile-compression", no_argument, &pC, 1},
@@ -1163,6 +1182,10 @@ int main(int argc, char **argv) {
 			filter = read_filter(optarg);
 			break;
 
+		case 'j':
+			filter = parse_filter(optarg);
+			break;
+
 		case 'p':
 			if (strcmp(optarg, "k") == 0) {
 				pk = true;

From b7df68c164f4085b60407344b8ea0f31771631c9 Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Mon, 28 Aug 2017 13:56:52 -0700
Subject: [PATCH 03/17] Remember how to keep a parse tree around after the
 parser is closed

---
 tile-join.cpp | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/tile-join.cpp b/tile-join.cpp
index 11e4f23b..7bd2c165 100644
--- a/tile-join.cpp
+++ b/tile-join.cpp
@@ -1049,8 +1049,8 @@ json_object *read_filter(const char *fname) {
 		fprintf(stderr, "%s: %s\n", fname, jp->error);
 		exit(EXIT_FAILURE);
 	}
-
-	// XXX clone tree instead of leaving pull open
+	json_disconnect(filter);
+	json_end(jp);
 	fclose(fp);
 	return filter;
 }
@@ -1063,8 +1063,8 @@ json_object *parse_filter(const char *s) {
 		fprintf(stderr, "%s\n", jp->error);
 		exit(EXIT_FAILURE);
 	}
-
-	// XXX clone tree instead of leaving pull open
+	json_disconnect(filter);
+	json_end(jp);
 	return filter;
 }
 
@@ -1301,5 +1301,9 @@ int main(int argc, char **argv) {
 		mbtiles_close(outdb, argv[0]);
 	}
 
+	if (filter != NULL) {
+		json_free(filter);
+	}
+
 	return 0;
 }

From 8d7f8af1d93bb7b1952f0d105f10d921b8e329af Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Mon, 28 Aug 2017 14:01:57 -0700
Subject: [PATCH 04/17] Make indent

---
 evaluator.cpp | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/evaluator.cpp b/evaluator.cpp
index 48feca7e..2b629d47 100644
--- a/evaluator.cpp
+++ b/evaluator.cpp
@@ -8,7 +8,7 @@ int compare(mvt_value one, json_object *two, bool &fail) {
 	if (one.type == mvt_string) {
 		if (two->type != JSON_STRING) {
 			fail = true;
-			return false; // string vs non-string
+			return false;  // string vs non-string
 		}
 
 		return strcmp(one.string_value.c_str(), two->string);
@@ -17,7 +17,7 @@ int compare(mvt_value one, json_object *two, bool &fail) {
 	if (one.type == mvt_double || one.type == mvt_float || one.type == mvt_int || one.type == mvt_uint || one.type == mvt_sint) {
 		if (two->type != JSON_NUMBER) {
 			fail = true;
-			return false; // number vs non-number
+			return false;  // number vs non-number
 		}
 
 		double v;
@@ -48,7 +48,7 @@ int compare(mvt_value one, json_object *two, bool &fail) {
 	if (one.type == mvt_bool) {
 		if (two->type != JSON_TRUE && two->type != JSON_FALSE) {
 			fail = true;
-			return false; // bool vs non-bool
+			return false;  // bool vs non-bool
 		}
 
 		bool b = two->type = JSON_TRUE;
@@ -108,7 +108,7 @@ bool eval(std::map<std::string, mvt_value> const &feature, json_object *f) {
 
 		auto ff = feature.find(std::string(f->array[1]->string));
 		if (ff == feature.end()) {
-			return false; // not found: comparison is false
+			return false;  // not found: comparison is false
 		}
 
 		bool fail = false;
@@ -179,6 +179,6 @@ bool evaluate(std::map<std::string, mvt_value> const &feature, std::string const
 	if (f != NULL) {
 		return eval(feature, f);
 	} else {
-		return true; // no filter for this layer;
+		return true;  // no filter for this layer;
 	}
 }

From 4e1611eec93fa10a67d9a637d4c6547837dda025 Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Mon, 28 Aug 2017 14:08:05 -0700
Subject: [PATCH 05/17] Fix boolean comparisions

---
 evaluator.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/evaluator.cpp b/evaluator.cpp
index 2b629d47..d8825783 100644
--- a/evaluator.cpp
+++ b/evaluator.cpp
@@ -51,7 +51,7 @@ int compare(mvt_value one, json_object *two, bool &fail) {
 			return false;  // bool vs non-bool
 		}
 
-		bool b = two->type = JSON_TRUE;
+		bool b = two->type != JSON_FALSE;
 		return one.numeric_value.bool_value > b;
 	}
 

From 754cbdc63449da44ee663b1f47531990525db4f4 Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Mon, 28 Aug 2017 14:21:41 -0700
Subject: [PATCH 06/17] Add short circuits; warnings for mismatched types,
 wrong array lengths

---
 evaluator.cpp | 54 ++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 41 insertions(+), 13 deletions(-)

diff --git a/evaluator.cpp b/evaluator.cpp
index d8825783..f721500e 100644
--- a/evaluator.cpp
+++ b/evaluator.cpp
@@ -65,7 +65,7 @@ bool eval(std::map<std::string, mvt_value> const &feature, json_object *f) {
 		exit(EXIT_FAILURE);
 	}
 
-	if (f->length < 2) {
+	if (f->length < 1) {
 		fprintf(stderr, "Array too small in filter: %s\n", json_stringify(f));
 		exit(EXIT_FAILURE);
 	}
@@ -75,20 +75,28 @@ bool eval(std::map<std::string, mvt_value> const &feature, json_object *f) {
 		exit(EXIT_FAILURE);
 	}
 
-	if (strcmp(f->array[0]->string, "has") == 0) {
-		if (f->array[1]->type != JSON_STRING) {
-			fprintf(stderr, "\"has\" key is not a string: %s\n", json_stringify(f));
+	if (strcmp(f->array[0]->string, "has") == 0 ||
+	    strcmp(f->array[0]->string, "!has") == 0) {
+		if (f->length != 2) {
+			fprintf(stderr, "Wrong number of array elements in filter: %s\n", json_stringify(f));
 			exit(EXIT_FAILURE);
 		}
-		return feature.count(std::string(f->array[1]->string)) != 0;
-	}
 
-	if (strcmp(f->array[0]->string, "!has") == 0) {
-		if (f->array[1]->type != JSON_STRING) {
-			fprintf(stderr, "\"!has\" key is not a string: %s\n", json_stringify(f));
-			exit(EXIT_FAILURE);
+		if (strcmp(f->array[0]->string, "has") == 0) {
+			if (f->array[1]->type != JSON_STRING) {
+				fprintf(stderr, "\"has\" key is not a string: %s\n", json_stringify(f));
+				exit(EXIT_FAILURE);
+			}
+			return feature.count(std::string(f->array[1]->string)) != 0;
+		}
+
+		if (strcmp(f->array[0]->string, "!has") == 0) {
+			if (f->array[1]->type != JSON_STRING) {
+				fprintf(stderr, "\"!has\" key is not a string: %s\n", json_stringify(f));
+				exit(EXIT_FAILURE);
+			}
+			return feature.count(std::string(f->array[1]->string)) == 0;
 		}
-		return feature.count(std::string(f->array[1]->string)) == 0;
 	}
 
 	if (strcmp(f->array[0]->string, "==") == 0 ||
@@ -97,8 +105,8 @@ bool eval(std::map<std::string, mvt_value> const &feature, json_object *f) {
 	    strcmp(f->array[0]->string, ">=") == 0 ||
 	    strcmp(f->array[0]->string, "<") == 0 ||
 	    strcmp(f->array[0]->string, "<=") == 0) {
-		if (f->length < 3) {
-			fprintf(stderr, "Array too small in filter: %s\n", json_stringify(f));
+		if (f->length != 3) {
+			fprintf(stderr, "Wrong number of array elements in filter: %s\n", json_stringify(f));
 			exit(EXIT_FAILURE);
 		}
 		if (f->array[1]->type != JSON_STRING) {
@@ -108,6 +116,13 @@ bool eval(std::map<std::string, mvt_value> const &feature, json_object *f) {
 
 		auto ff = feature.find(std::string(f->array[1]->string));
 		if (ff == feature.end()) {
+			static bool warned = false;
+			if (!warned) {
+				const char *s = json_stringify(f);
+				fprintf(stderr, "Warning: attribute not found for comparison: %s\n", s);
+				free((void *) s);
+				warned = true;
+			}
 			return false;  // not found: comparison is false
 		}
 
@@ -115,6 +130,13 @@ bool eval(std::map<std::string, mvt_value> const &feature, json_object *f) {
 		int cmp = compare(ff->second, f->array[2], fail);
 
 		if (fail) {
+			static bool warned = false;
+			if (!warned) {
+				const char *s = json_stringify(f);
+				fprintf(stderr, "Warning: mismatched type in comparison: %s\n", s);
+				free((void *) s);
+				warned = true;
+			}
 			return false;
 		}
 
@@ -157,8 +179,14 @@ bool eval(std::map<std::string, mvt_value> const &feature, json_object *f) {
 
 			if (strcmp(f->array[0]->string, "all") == 0) {
 				v = v && out;
+				if (!v) {
+					break;
+				}
 			} else {
 				v = v || out;
+				if (v) {
+					break;
+				}
 			}
 		}
 

From 1581b79a3e394d0ee453a99ff341405a392f1908 Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Mon, 28 Aug 2017 14:35:07 -0700
Subject: [PATCH 07/17] Forgot to implement "in" and "!in"

---
 evaluator.cpp | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/evaluator.cpp b/evaluator.cpp
index f721500e..c976c447 100644
--- a/evaluator.cpp
+++ b/evaluator.cpp
@@ -197,6 +197,59 @@ bool eval(std::map<std::string, mvt_value> const &feature, json_object *f) {
 		}
 	}
 
+	if (strcmp(f->array[0]->string, "in") == 0 ||
+	    strcmp(f->array[0]->string, "!in") == 0) {
+		if (f->length < 2) {
+			fprintf(stderr, "Array too small in filter: %s\n", json_stringify(f));
+			exit(EXIT_FAILURE);
+		}
+
+		if (f->array[1]->type != JSON_STRING) {
+			fprintf(stderr, "\"!has\" key is not a string: %s\n", json_stringify(f));
+			exit(EXIT_FAILURE);
+		}
+
+		auto ff = feature.find(std::string(f->array[1]->string));
+		if (ff == feature.end()) {
+			static bool warned = false;
+			if (!warned) {
+				const char *s = json_stringify(f);
+				fprintf(stderr, "Warning: attribute not found for comparison: %s\n", s);
+				free((void *) s);
+				warned = true;
+			}
+			return false;  // not found: comparison is false
+		}
+
+		bool found = false;
+		for (size_t i = 2; i < f->length; i++) {
+			bool fail = false;
+			int cmp = compare(ff->second, f->array[i], fail);
+
+			if (fail) {
+				static bool warned = false;
+				if (!warned) {
+					const char *s = json_stringify(f);
+					fprintf(stderr, "Warning: mismatched type in comparison: %s\n", s);
+					free((void *) s);
+					warned = true;
+				}
+				cmp = 1;
+			}
+
+			if (cmp == 0) {
+				found = true;
+				break;
+			}
+		}
+
+		if (strcmp(f->array[0]->string, "in") == 0) {
+			return found;
+		} else {
+			return !found;
+		}
+	}
+
 	fprintf(stderr, "Unknown filter %s\n", json_stringify(f));
 	exit(EXIT_FAILURE);
 }

From 0d56d1bf3830d976c3e8bea040284be8897de02f Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Tue, 29 Aug 2017 14:49:24 -0700
Subject: [PATCH 08/17] Add missing #include

---
 evaluator.cpp       | 1 +
 jsonpull/jsonpull.c | 4 ++--
 jsonpull/jsonpull.h | 2 +-
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/evaluator.cpp b/evaluator.cpp
index c976c447..3f113ff8 100644
--- a/evaluator.cpp
+++ b/evaluator.cpp
@@ -1,5 +1,6 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <map>
 #include "mvt.hpp"
 #include "evaluator.hpp"
diff --git a/jsonpull/jsonpull.c b/jsonpull/jsonpull.c
index 35caac89..3067f4fe 100644
--- a/jsonpull/jsonpull.c
+++ b/jsonpull/jsonpull.c
@@ -77,12 +77,12 @@ static ssize_t read_string(json_pull *j, char *buffer, size_t n) {
 		out++;
 	}
 
-	j->source = cp + out;
+	j->source = (void *) (cp + out);
 	return out;
 }
 
 json_pull *json_begin_string(const char *s) {
-	return json_begin(read_string, s);
+	return json_begin(read_string, (void *) s);
 }
 
 void json_end(json_pull *p) {
diff --git a/jsonpull/jsonpull.h b/jsonpull/jsonpull.h
index 2f44b1d9..1983a354 100644
--- a/jsonpull/jsonpull.h
+++ b/jsonpull/jsonpull.h
@@ -46,7 +46,7 @@ typedef struct json_pull {
 	int line;
 
 	ssize_t (*read)(struct json_pull *, char *buf, size_t n);
-	const void *source;
+	void *source;
 	char *buffer;
 	ssize_t buffer_tail;
 	ssize_t buffer_head;

From 0fd445412966848fe0edacc99cc402d629c7f4ff Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Fri, 1 Sep 2017 11:51:12 -0700
Subject: [PATCH 09/17] Allow filter expressions during tippecanoe as well as
 during tile-join

---
 Makefile         |  2 +-
 README.md        |  6 ++++--
 evaluator.cpp    | 56 ++++++++++++++++++++++++++++++++++++++++++------
 evaluator.hpp    |  2 ++
 main.cpp         | 33 +++++++++++++++++++++-------
 man/tippecanoe.1 |  8 +++++--
 serial.cpp       | 39 +++++++++++++++++++++++++++++++++
 serial.hpp       |  2 ++
 tile-join.cpp    | 36 ++-----------------------------
 9 files changed, 131 insertions(+), 53 deletions(-)

diff --git a/Makefile b/Makefile
index 7144f0d3..aec389e0 100644
--- a/Makefile
+++ b/Makefile
@@ -46,7 +46,7 @@ C = $(wildcard *.c) $(wildcard *.cpp)
 INCLUDES = -I/usr/local/include -I.
 LIBS = -L/usr/local/lib
 
-tippecanoe: geojson.o jsonpull/jsonpull.o tile.o pool.o mbtiles.o geometry.o projection.o memfile.o mvt.o serial.o main.o text.o dirtiles.o plugin.o read_json.o write_json.o geobuf.o
+tippecanoe: geojson.o jsonpull/jsonpull.o tile.o pool.o mbtiles.o geometry.o projection.o memfile.o mvt.o serial.o main.o text.o dirtiles.o plugin.o read_json.o write_json.o geobuf.o evaluator.o
 	$(CXX) $(PG) $(LIBS) $(FINAL_FLAGS) $(CXXFLAGS) -o $@ $^ $(LDFLAGS) -lm -lz -lsqlite3 -lpthread
 
 tippecanoe-enumerate: enumerate.o
diff --git a/README.md b/README.md
index 94f69902..7516b591 100644
--- a/README.md
+++ b/README.md
@@ -160,6 +160,8 @@ resolution is obtained than by using a smaller _maxzoom_ or _detail_.
    If the type is `bool`, then original attributes of `0` (or, if numeric, `0.0`, etc.), `false`, `null`, or the empty string become `false`, and otherwise become `true`.
    If the type is `float` or `int` and the original attribute was non-numeric, it becomes `0`.
    If the type is `int` and the original attribute was floating-point, it is rounded to the nearest integer.
+ * `-j` *filter* or `--feature-filter`=*filter*: Check features against a per-layer filter (as defined in the [Mapbox GL Style Specification](https://www.mapbox.com/mapbox-gl-js/style-spec/#types-filter)) and only include those that match. Any features in layers that have no filter specified will be passed through. Filters for the layer `"*"` apply to all layers.
+ * `-J` *filter-file* or `--feature-filter-file`=*filter-file*: Like `-j`, but read the filter from a file.
 
 ### Dropping a fixed fraction of features by zoom level
 
@@ -483,8 +485,8 @@ The options are:
 
  * `-x` *key* or `--exclude=`*key*: Remove attributes of type *key* from the output. You can use this to remove the field you are matching against if you no longer need it after joining, or to remove any other attributes you don't want.
  * `-i` or `--if-matched`: Only include features that matched the CSV.
- * `-j` *filter* or `--gl-filter`=*filter*: Check features against a per-layer filter (as defined in the [Mapbox GL Style Specification](https://www.mapbox.com/mapbox-gl-js/style-spec/#types-filter)) and only include those that match. Any features in layers that have no filter specified will be passed through.
- * `-J` *filter-file* or `--gl-filter-file`=*filter-file*: Like `-j`, but read the filter from a file.
+ * `-j` *filter* or `--feature-filter`=*filter*: Check features against a per-layer filter (as defined in the [Mapbox GL Style Specification](https://www.mapbox.com/mapbox-gl-js/style-spec/#types-filter)) and only include those that match. Any features in layers that have no filter specified will be passed through. Filters for the layer `"*"` apply to all layers.
+ * `-J` *filter-file* or `--feature-filter-file`=*filter-file*: Like `-j`, but read the filter from a file.
 
 Example: to find the Natural Earth countries with low `scalerank` but high `LABELRANK`:
 
diff --git a/evaluator.cpp b/evaluator.cpp
index 3f113ff8..faa17895 100644
--- a/evaluator.cpp
+++ b/evaluator.cpp
@@ -256,11 +256,55 @@ bool eval(std::map<std::string, mvt_value> const &feature, json_object *f) {
 }
 
 bool evaluate(std::map<std::string, mvt_value> const &feature, std::string const &layer, json_object *filter) {
-	json_object *f = json_hash_get(filter, layer.c_str());
-
-	if (f != NULL) {
-		return eval(feature, f);
-	} else {
-		return true;  // no filter for this layer;
+	if (filter == NULL || filter->type != JSON_HASH) {
+		fprintf(stderr, "Error: filter is not a hash: %s\n", json_stringify(filter));
+		exit(EXIT_FAILURE);
 	}
+
+	bool ok = true;
+	json_object *f;
+
+	f = json_hash_get(filter, layer.c_str());
+	if (ok && f != NULL) {
+		ok = eval(feature, f);
+	}
+
+	f = json_hash_get(filter, "*");
+	if (ok && f != NULL) {
+		ok = eval(feature, f);
+	}
+
+	return ok;
+}
+
+json_object *read_filter(const char *fname) {
+	FILE *fp = fopen(fname, "r");
+	if (fp == NULL) {
+		perror(fname);
+		exit(EXIT_FAILURE);
+	}
+
+	json_pull *jp = json_begin_file(fp);
+	json_object *filter = json_read_tree(jp);
+	if (filter == NULL) {
+		fprintf(stderr, "%s: %s\n", fname, jp->error);
+		exit(EXIT_FAILURE);
+	}
+	json_disconnect(filter);
+	json_end(jp);
+	fclose(fp);
+	return filter;
+}
+
+json_object *parse_filter(const char *s) {
+	json_pull *jp = json_begin_string(s);
+	json_object *filter = json_read_tree(jp);
+	if (filter == NULL) {
+		fprintf(stderr, "Could not parse filter %s\n", s);
+		fprintf(stderr, "%s\n", jp->error);
+		exit(EXIT_FAILURE);
+	}
+	json_disconnect(filter);
+	json_end(jp);
+	return filter;
 }
diff --git a/evaluator.hpp b/evaluator.hpp
index da65a217..99bcb27d 100644
--- a/evaluator.hpp
+++ b/evaluator.hpp
@@ -7,5 +7,7 @@
 #include "mvt.hpp"
 
 bool evaluate(std::map<std::string, mvt_value> const &feature, std::string const &layer, json_object *filter);
+json_object *parse_filter(const char *s);
+json_object *read_filter(const char *fname);
 
 #endif
diff --git a/main.cpp b/main.cpp
index 5ae5c199..5d0f9a5f 100644
--- a/main.cpp
+++ b/main.cpp
@@ -56,6 +56,7 @@
 #include "options.hpp"
 #include "mvt.hpp"
 #include "dirtiles.hpp"
+#include "evaluator.hpp"
 
 static int low_detail = 12;
 static int full_detail = -1;
@@ -349,7 +350,7 @@ void *run_sort(void *v) {
 	return NULL;
 }
 
-void do_read_parallel(char *map, long long len, long long initial_offset, const char *reading, struct reader *readers, volatile long long *progress_seq, std::set<std::string> *exclude, std::set<std::string> *include, int exclude_all, char *fname, int basezoom, int source, int nlayers, std::vector<std::map<std::string, layermap_entry> > *layermaps, double droprate, int *initialized, unsigned *initial_x, unsigned *initial_y, int maxzoom, std::string layername, bool uses_gamma, std::map<std::string, int> const *attribute_types, int separator, double *dist_sum, size_t *dist_count, bool want_dist, bool filters) {
+void do_read_parallel(char *map, long long len, long long initial_offset, const char *reading, struct reader *readers, volatile long long *progress_seq, std::set<std::string> *exclude, std::set<std::string> *include, int exclude_all, json_object *filter, char *fname, int basezoom, int source, int nlayers, std::vector<std::map<std::string, layermap_entry> > *layermaps, double droprate, int *initialized, unsigned *initial_x, unsigned *initial_y, int maxzoom, std::string layername, bool uses_gamma, std::map<std::string, int> const *attribute_types, int separator, double *dist_sum, size_t *dist_count, bool want_dist, bool filters) {
 	long long segs[CPUS + 1];
 	segs[0] = 0;
 	segs[CPUS] = len;
@@ -400,6 +401,7 @@ void do_read_parallel(char *map, long long len, long long initial_offset, const
 		sst[i].filters = filters;
 		sst[i].layermap = &(*layermaps)[i];
 		sst[i].exclude = exclude;
+		sst[i].filter = filter;
 		sst[i].include = include;
 		sst[i].exclude_all = exclude_all;
 		sst[i].basezoom = basezoom;
@@ -445,6 +447,7 @@ struct read_parallel_arg {
 	std::set<std::string> *exclude;
 	std::set<std::string> *include;
 	int exclude_all;
+	json_object *filter;
 	char *fname;
 	int maxzoom;
 	int basezoom;
@@ -483,7 +486,7 @@ void *run_read_parallel(void *v) {
 	}
 	madvise(map, rpa->len, MADV_RANDOM);  // sequential, but from several pointers at once
 
-	do_read_parallel(map, rpa->len, rpa->offset, rpa->reading, rpa->readers, rpa->progress_seq, rpa->exclude, rpa->include, rpa->exclude_all, rpa->fname, rpa->basezoom, rpa->source, rpa->nlayers, rpa->layermaps, rpa->droprate, rpa->initialized, rpa->initial_x, rpa->initial_y, rpa->maxzoom, rpa->layername, rpa->uses_gamma, rpa->attribute_types, rpa->separator, rpa->dist_sum, rpa->dist_count, rpa->want_dist, rpa->filters);
+	do_read_parallel(map, rpa->len, rpa->offset, rpa->reading, rpa->readers, rpa->progress_seq, rpa->exclude, rpa->include, rpa->exclude_all, rpa->filter, rpa->fname, rpa->basezoom, rpa->source, rpa->nlayers, rpa->layermaps, rpa->droprate, rpa->initialized, rpa->initial_x, rpa->initial_y, rpa->maxzoom, rpa->layername, rpa->uses_gamma, rpa->attribute_types, rpa->separator, rpa->dist_sum, rpa->dist_count, rpa->want_dist, rpa->filters);
 
 	madvise(map, rpa->len, MADV_DONTNEED);
 	if (munmap(map, rpa->len) != 0) {
@@ -500,7 +503,7 @@ void *run_read_parallel(void *v) {
 	return NULL;
 }
 
-void start_parsing(int fd, FILE *fp, long long offset, long long len, volatile int *is_parsing, pthread_t *parallel_parser, bool &parser_created, const char *reading, struct reader *readers, volatile long long *progress_seq, std::set<std::string> *exclude, std::set<std::string> *include, int exclude_all, char *fname, int basezoom, int source, int nlayers, std::vector<std::map<std::string, layermap_entry> > &layermaps, double droprate, int *initialized, unsigned *initial_x, unsigned *initial_y, int maxzoom, std::string layername, bool uses_gamma, std::map<std::string, int> const *attribute_types, int separator, double *dist_sum, size_t *dist_count, bool want_dist, bool filters) {
+void start_parsing(int fd, FILE *fp, long long offset, long long len, volatile int *is_parsing, pthread_t *parallel_parser, bool &parser_created, const char *reading, struct reader *readers, volatile long long *progress_seq, std::set<std::string> *exclude, std::set<std::string> *include, int exclude_all, json_object *filter, char *fname, int basezoom, int source, int nlayers, std::vector<std::map<std::string, layermap_entry> > &layermaps, double droprate, int *initialized, unsigned *initial_x, unsigned *initial_y, int maxzoom, std::string layername, bool uses_gamma, std::map<std::string, int> const *attribute_types, int separator, double *dist_sum, size_t *dist_count, bool want_dist, bool filters) {
 	// This has to kick off an intermediate thread to start the parser threads,
 	// so the main thread can get back to reading the next input stage while
 	// the intermediate thread waits for the completion of the parser threads.
@@ -526,6 +529,7 @@ void start_parsing(int fd, FILE *fp, long long offset, long long len, volatile i
 	rpa->exclude = exclude;
 	rpa->include = include;
 	rpa->exclude_all = exclude_all;
+	rpa->filter = filter;
 	rpa->fname = fname;
 	rpa->basezoom = basezoom;
 	rpa->source = source;
@@ -1001,7 +1005,7 @@ void choose_first_zoom(long long *file_bbox, struct reader *readers, unsigned *i
 	}
 }
 
-int read_input(std::vector<source> &sources, char *fname, int maxzoom, int minzoom, int basezoom, double basezoom_marker_width, sqlite3 *outdb, const char *outdir, std::set<std::string> *exclude, std::set<std::string> *include, int exclude_all, double droprate, int buffer, const char *tmpdir, double gamma, int read_parallel, int forcetable, const char *attribution, bool uses_gamma, long long *file_bbox, const char *prefilter, const char *postfilter, const char *description, bool guess_maxzoom, std::map<std::string, int> const *attribute_types, const char *pgm) {
+int read_input(std::vector<source> &sources, char *fname, int maxzoom, int minzoom, int basezoom, double basezoom_marker_width, sqlite3 *outdb, const char *outdir, std::set<std::string> *exclude, std::set<std::string> *include, int exclude_all, json_object *filter, double droprate, int buffer, const char *tmpdir, double gamma, int read_parallel, int forcetable, const char *attribution, bool uses_gamma, long long *file_bbox, const char *prefilter, const char *postfilter, const char *description, bool guess_maxzoom, std::map<std::string, int> const *attribute_types, const char *pgm) {
 	int ret = EXIT_SUCCESS;
 
 	struct reader readers[CPUS];
@@ -1237,6 +1241,7 @@ int read_input(std::vector<source> &sources, char *fname, int maxzoom, int minzo
 				sst[i].exclude = exclude;
 				sst[i].include = include;
 				sst[i].exclude_all = exclude_all;
+				sst[i].filter = filter;
 				sst[i].basezoom = basezoom;
 				sst[i].attribute_types = attribute_types;
 			}
@@ -1299,7 +1304,7 @@ int read_input(std::vector<source> &sources, char *fname, int maxzoom, int minzo
 		}
 
 		if (map != NULL && map != MAP_FAILED && read_parallel_this) {
-			do_read_parallel(map, st.st_size - off, overall_offset, reading.c_str(), readers, &progress_seq, exclude, include, exclude_all, fname, basezoom, layer, nlayers, &layermaps, droprate, initialized, initial_x, initial_y, maxzoom, sources[layer].layer, uses_gamma, attribute_types, read_parallel_this, &dist_sum, &dist_count, guess_maxzoom, prefilter != NULL || postfilter != NULL);
+			do_read_parallel(map, st.st_size - off, overall_offset, reading.c_str(), readers, &progress_seq, exclude, include, exclude_all, filter, fname, basezoom, layer, nlayers, &layermaps, droprate, initialized, initial_x, initial_y, maxzoom, sources[layer].layer, uses_gamma, attribute_types, read_parallel_this, &dist_sum, &dist_count, guess_maxzoom, prefilter != NULL || postfilter != NULL);
 			overall_offset += st.st_size - off;
 			checkdisk(readers, CPUS);
 
@@ -1375,7 +1380,7 @@ int read_input(std::vector<source> &sources, char *fname, int maxzoom, int minzo
 							}
 
 							fflush(readfp);
-							start_parsing(readfd, readfp, initial_offset, ahead, &is_parsing, &parallel_parser, parser_created, reading.c_str(), readers, &progress_seq, exclude, include, exclude_all, fname, basezoom, layer, nlayers, layermaps, droprate, initialized, initial_x, initial_y, maxzoom, sources[layer].layer, gamma != 0, attribute_types, read_parallel_this, &dist_sum, &dist_count, guess_maxzoom, prefilter != NULL || postfilter != NULL);
+							start_parsing(readfd, readfp, initial_offset, ahead, &is_parsing, &parallel_parser, parser_created, reading.c_str(), readers, &progress_seq, exclude, include, exclude_all, filter, fname, basezoom, layer, nlayers, layermaps, droprate, initialized, initial_x, initial_y, maxzoom, sources[layer].layer, gamma != 0, attribute_types, read_parallel_this, &dist_sum, &dist_count, guess_maxzoom, prefilter != NULL || postfilter != NULL);
 
 							initial_offset += ahead;
 							overall_offset += ahead;
@@ -1412,7 +1417,7 @@ int read_input(std::vector<source> &sources, char *fname, int maxzoom, int minzo
 				fflush(readfp);
 
 				if (ahead > 0) {
-					start_parsing(readfd, readfp, initial_offset, ahead, &is_parsing, &parallel_parser, parser_created, reading.c_str(), readers, &progress_seq, exclude, include, exclude_all, fname, basezoom, layer, nlayers, layermaps, droprate, initialized, initial_x, initial_y, maxzoom, sources[layer].layer, gamma != 0, attribute_types, read_parallel_this, &dist_sum, &dist_count, guess_maxzoom, prefilter != NULL || postfilter != NULL);
+					start_parsing(readfd, readfp, initial_offset, ahead, &is_parsing, &parallel_parser, parser_created, reading.c_str(), readers, &progress_seq, exclude, include, exclude_all, filter, fname, basezoom, layer, nlayers, layermaps, droprate, initialized, initial_x, initial_y, maxzoom, sources[layer].layer, gamma != 0, attribute_types, read_parallel_this, &dist_sum, &dist_count, guess_maxzoom, prefilter != NULL || postfilter != NULL);
 
 					if (parser_created) {
 						if (pthread_join(parallel_parser, NULL) != 0) {
@@ -1450,6 +1455,7 @@ int read_input(std::vector<source> &sources, char *fname, int maxzoom, int minzo
 				sst.exclude = exclude;
 				sst.include = include;
 				sst.exclude_all = exclude_all;
+				sst.filter = filter;
 				sst.basezoom = basezoom;
 				sst.attribute_types = attribute_types;
 
@@ -2143,6 +2149,7 @@ int main(int argc, char **argv) {
 	int exclude_all = 0;
 	int read_parallel = 0;
 	int files_open_at_start;
+	json_object *filter = NULL;
 
 	for (i = 0; i < 256; i++) {
 		prevent[i] = 0;
@@ -2186,6 +2193,8 @@ int main(int argc, char **argv) {
 		{"include", required_argument, 0, 'y'},
 		{"exclude-all", no_argument, 0, 'X'},
 		{"attribute-type", required_argument, 0, 'T'},
+		{"feature-filter-file", required_argument, 0, 'J'},
+		{"feature-filter", required_argument, 0, 'j'},
 
 		{"Dropping a fixed fraction of features by zoom level", 0, 0, 0},
 		{"drop-rate", required_argument, 0, 'r'},
@@ -2415,6 +2424,14 @@ int main(int argc, char **argv) {
 			exclude_all = 1;
 			break;
 
+		case 'J':
+			filter = read_filter(optarg);
+			break;
+
+		case 'j':
+			filter = parse_filter(optarg);
+			break;
+
 		case 'r':
 			if (strcmp(optarg, "g") == 0) {
 				droprate = -2;
@@ -2663,7 +2680,7 @@ int main(int argc, char **argv) {
 
 	long long file_bbox[4] = {UINT_MAX, UINT_MAX, 0, 0};
 
-	ret = read_input(sources, name ? name : out_mbtiles ? out_mbtiles : out_dir, maxzoom, minzoom, basezoom, basezoom_marker_width, outdb, out_dir, &exclude, &include, exclude_all, droprate, buffer, tmpdir, gamma, read_parallel, forcetable, attribution, gamma != 0, file_bbox, prefilter, postfilter, description, guess_maxzoom, &attribute_types, argv[0]);
+	ret = read_input(sources, name ? name : out_mbtiles ? out_mbtiles : out_dir, maxzoom, minzoom, basezoom, basezoom_marker_width, outdb, out_dir, &exclude, &include, exclude_all, filter, droprate, buffer, tmpdir, gamma, read_parallel, forcetable, attribution, gamma != 0, file_bbox, prefilter, postfilter, description, guess_maxzoom, &attribute_types, argv[0]);
 
 	if (outdb != NULL) {
 		mbtiles_close(outdb, argv[0]);
diff --git a/man/tippecanoe.1 b/man/tippecanoe.1
index 1bdc2175..d2706bcc 100644
--- a/man/tippecanoe.1
+++ b/man/tippecanoe.1
@@ -178,6 +178,10 @@ The \fItype\fP may be \fB\fCstring\fR, \fB\fCfloat\fR, \fB\fCint\fR, or \fB\fCbo
 If the type is \fB\fCbool\fR, then original attributes of \fB\fC0\fR (or, if numeric, \fB\fC0.0\fR, etc.), \fB\fCfalse\fR, \fB\fCnull\fR, or the empty string become \fB\fCfalse\fR, and otherwise become \fB\fCtrue\fR\&.
 If the type is \fB\fCfloat\fR or \fB\fCint\fR and the original attribute was non\-numeric, it becomes \fB\fC0\fR\&.
 If the type is \fB\fCint\fR and the original attribute was floating\-point, it is rounded to the nearest integer.
+.IP \(bu 2
+\fB\fC\-j\fR \fIfilter\fP or \fB\fC\-\-feature\-filter\fR=\fIfilter\fP: Check features against a per\-layer filter (as defined in the Mapbox GL Style Specification \[la]https://www.mapbox.com/mapbox-gl-js/style-spec/#types-filter\[ra]) and only include those that match. Any features in layers that have no filter specified will be passed through. Filters for the layer \fB\fC"*"\fR apply to all layers.
+.IP \(bu 2
+\fB\fC\-J\fR \fIfilter\-file\fP or \fB\fC\-\-feature\-filter\-file\fR=\fIfilter\-file\fP: Like \fB\fC\-j\fR, but read the filter from a file.
 .RE
 .SS Dropping a fixed fraction of features by zoom level
 .RS
@@ -569,9 +573,9 @@ The options are:
 .IP \(bu 2
 \fB\fC\-i\fR or \fB\fC\-\-if\-matched\fR: Only include features that matched the CSV.
 .IP \(bu 2
-\fB\fC\-j\fR \fIfilter\fP or \fB\fC\-\-gl\-filter\fR=\fIfilter\fP: Check features against a per\-layer filter (as defined in the Mapbox GL Style Specification \[la]https://www.mapbox.com/mapbox-gl-js/style-spec/#types-filter\[ra]) and only include those that match. Any features in layers that have no filter specified will be passed through.
+\fB\fC\-j\fR \fIfilter\fP or \fB\fC\-\-feature\-filter\fR=\fIfilter\fP: Check features against a per\-layer filter (as defined in the Mapbox GL Style Specification \[la]https://www.mapbox.com/mapbox-gl-js/style-spec/#types-filter\[ra]) and only include those that match. Any features in layers that have no filter specified will be passed through. Filters for the layer \fB\fC"*"\fR apply to all layers.
 .IP \(bu 2
-\fB\fC\-J\fR \fIfilter\-file\fP or \fB\fC\-\-gl\-filter\-file\fR=\fIfilter\-file\fP: Like \fB\fC\-j\fR, but read the filter from a file.
+\fB\fC\-J\fR \fIfilter\-file\fP or \fB\fC\-\-feature\-filter\-file\fR=\fIfilter\-file\fP: Like \fB\fC\-j\fR, but read the filter from a file.
 .RE
 .PP
 Example: to find the Natural Earth countries with low \fB\fCscalerank\fR but high \fB\fCLABELRANK\fR:
diff --git a/serial.cpp b/serial.cpp
index 03f72d72..da198b75 100644
--- a/serial.cpp
+++ b/serial.cpp
@@ -18,6 +18,7 @@
 #include "main.hpp"
 #include "pool.hpp"
 #include "projection.hpp"
+#include "evaluator.hpp"
 #include "milo/dtoa_milo.h"
 
 size_t fwrite_check(const void *ptr, size_t size, size_t nitems, FILE *stream, const char *fname) {
@@ -531,6 +532,44 @@ int serialize_feature(struct serialization_state *sst, serial_feature &sf) {
 		}
 	}
 
+	if (sst->filter != NULL) {
+		std::map<std::string, mvt_value> attributes;
+
+		for (size_t i = 0; i < sf.full_keys.size(); i++) {
+			if (sf.full_keys[i] != "") {
+				std::string key = sf.full_keys[i];
+				mvt_value val = stringified_to_mvt_value(sf.full_values[i].type, sf.full_values[i].s.c_str());
+
+				attributes.insert(std::pair<std::string, mvt_value>(key, val));
+			}
+		}
+
+		if (sf.has_id) {
+			mvt_value v;
+			v.type = mvt_uint;
+			v.numeric_value.uint_value = sf.id;
+
+			attributes.insert(std::pair<std::string, mvt_value>("$id", v));
+		}
+
+		mvt_value v;
+		v.type = mvt_string;
+
+		if (sf.t == mvt_point) {
+			v.string_value = "Point";
+		} else if (sf.t == mvt_linestring) {
+			v.string_value = "LineString";
+		} else if (sf.t == mvt_polygon) {
+			v.string_value = "Polygon";
+		}
+
+		attributes.insert(std::pair<std::string, mvt_value>("$type", v));
+
+		if (!evaluate(attributes, sf.layername, sst->filter)) {
+			return 0;
+		}
+	}
+
 	if (!sst->filters) {
 		for (size_t i = 0; i < sf.full_keys.size(); i++) {
 			if (sf.full_keys[i].size() == 0) {
diff --git a/serial.hpp b/serial.hpp
index 439c30ed..918e3e81 100644
--- a/serial.hpp
+++ b/serial.hpp
@@ -7,6 +7,7 @@
 #include <sys/stat.h>
 #include "geometry.hpp"
 #include "mbtiles.hpp"
+#include "jsonpull/jsonpull.h"
 
 size_t fwrite_check(const void *ptr, size_t size, size_t nitems, FILE *stream, const char *fname);
 
@@ -125,6 +126,7 @@ struct serialization_state {
 	std::set<std::string> *exclude;
 	std::set<std::string> *include;
 	int exclude_all;
+	json_object *filter;
 };
 
 int serialize_feature(struct serialization_state *sst, serial_feature &sf);
diff --git a/tile-join.cpp b/tile-join.cpp
index 801a29c1..b11e8ed0 100644
--- a/tile-join.cpp
+++ b/tile-join.cpp
@@ -1037,38 +1037,6 @@ void readcsv(char *fn, std::vector<std::string> &header, std::map<std::string, s
 	}
 }
 
-json_object *read_filter(const char *fname) {
-	FILE *fp = fopen(fname, "r");
-	if (fp == NULL) {
-		perror(fname);
-		exit(EXIT_FAILURE);
-	}
-
-	json_pull *jp = json_begin_file(fp);
-	json_object *filter = json_read_tree(jp);
-	if (filter == NULL) {
-		fprintf(stderr, "%s: %s\n", fname, jp->error);
-		exit(EXIT_FAILURE);
-	}
-	json_disconnect(filter);
-	json_end(jp);
-	fclose(fp);
-	return filter;
-}
-
-json_object *parse_filter(const char *s) {
-	json_pull *jp = json_begin_string(s);
-	json_object *filter = json_read_tree(jp);
-	if (filter == NULL) {
-		fprintf(stderr, "Could not parse filter %s\n", s);
-		fprintf(stderr, "%s\n", jp->error);
-		exit(EXIT_FAILURE);
-	}
-	json_disconnect(filter);
-	json_end(jp);
-	return filter;
-}
-
 int main(int argc, char **argv) {
 	char *out_mbtiles = NULL;
 	char *out_dir = NULL;
@@ -1113,8 +1081,8 @@ int main(int argc, char **argv) {
 		{"quiet", no_argument, 0, 'q'},
 		{"maximum-zoom", required_argument, 0, 'z'},
 		{"minimum-zoom", required_argument, 0, 'Z'},
-		{"gl-filter-file", required_argument, 0, 'J'},
-		{"gl-filter", required_argument, 0, 'j'},
+		{"feature-filter-file", required_argument, 0, 'J'},
+		{"feature-filter", required_argument, 0, 'j'},
 
 		{"no-tile-size-limit", no_argument, &pk, 1},
 		{"no-tile-compression", no_argument, &pC, 1},

From c232e565dbb6468cb674126e19776e3468665063 Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Fri, 1 Sep 2017 15:14:14 -0700
Subject: [PATCH 10/17] Working on testing against Mapbox GL JS filter tests

---
 evaluator.cpp                                 |  18 +
 geojson.cpp                                   |   5 +
 mvt.cpp                                       |   2 +
 serial.cpp                                    |  15 +-
 tests/feature-filter/filter                   | 133 +++++
 tests/feature-filter/in.json                  | 338 +++++++++++++
 .../-z0_-Jtests%feature-filter%filter.json    | 478 ++++++++++++++++++
 tests/make-filter-test                        |  77 +++
 8 files changed, 1060 insertions(+), 6 deletions(-)
 create mode 100644 tests/feature-filter/filter
 create mode 100644 tests/feature-filter/in.json
 create mode 100644 tests/feature-filter/out/-z0_-Jtests%feature-filter%filter.json
 create mode 100755 tests/make-filter-test

diff --git a/evaluator.cpp b/evaluator.cpp
index faa17895..20fe8234 100644
--- a/evaluator.cpp
+++ b/evaluator.cpp
@@ -56,6 +56,15 @@ int compare(mvt_value one, json_object *two, bool &fail) {
 		return one.numeric_value.bool_value > b;
 	}
 
+	if (one.type == mvt_null) {
+		if (two->type != JSON_NULL) {
+			fail = true;
+			return false;  // null vs non-null
+		}
+
+		return 0;  // null equals null
+	}
+
 	fprintf(stderr, "Internal error: bad mvt type %d\n", one.type);
 	exit(EXIT_FAILURE);
 }
@@ -124,6 +133,9 @@ bool eval(std::map<std::string, mvt_value> const &feature, json_object *f) {
 				free((void *) s);
 				warned = true;
 			}
+			if (strcmp(f->array[0]->string, "!=") == 0) {
+				return true;  //  attributes that aren't found are not equal
+			}
 			return false;  // not found: comparison is false
 		}
 
@@ -138,6 +150,9 @@ bool eval(std::map<std::string, mvt_value> const &feature, json_object *f) {
 				free((void *) s);
 				warned = true;
 			}
+			if (strcmp(f->array[0]->string, "!=") == 0) {
+				return true;  // mismatched types are not equal
+			}
 			return false;
 		}
 
@@ -219,6 +234,9 @@ bool eval(std::map<std::string, mvt_value> const &feature, json_object *f) {
 				free((void *) s);
 				warned = true;
 			}
+			if (strcmp(f->array[0]->string, "!in") == 0) {
+				return true;  // attributes that aren't found are not in
+			}
 			return false;  // not found: comparison is false
 		}
 
diff --git a/geojson.cpp b/geojson.cpp
index e3c0461c..178236dc 100644
--- a/geojson.cpp
+++ b/geojson.cpp
@@ -165,6 +165,11 @@ int serialize_geojson_feature(struct serialization_state *sst, json_object *geom
 				metatype[m] = type;
 				metaval[m] = val;
 				m++;
+			} else {
+				metakey[m] = properties->keys[i]->string;
+				metatype[m] = mvt_null;
+				metaval[m] = "null";
+				m++;
 			}
 		}
 	}
diff --git a/mvt.cpp b/mvt.cpp
index 6feceb91..9559dd4d 100644
--- a/mvt.cpp
+++ b/mvt.cpp
@@ -530,6 +530,8 @@ mvt_value stringified_to_mvt_value(int type, const char *s) {
 	} else if (type == mvt_bool) {
 		tv.type = mvt_bool;
 		tv.numeric_value.bool_value = (s[0] == 't');
+	} else if (type == mvt_null) {
+		tv.type = mvt_null;
 	} else {
 		tv.type = mvt_string;
 		tv.string_value = s;
diff --git a/serial.cpp b/serial.cpp
index da198b75..76b99d20 100644
--- a/serial.cpp
+++ b/serial.cpp
@@ -514,22 +514,18 @@ int serialize_feature(struct serialization_state *sst, serial_feature &sf) {
 
 	for (size_t i = 0; i < sf.full_keys.size(); i++) {
 		if (sst->exclude_all) {
-			if (sst->include->count(sf.full_keys[i]) == 0) {
+			if (sst->include->count(sf.full_keys[i]) == 0 && sf.full_keys[i] != "") {
 				sf.full_keys[i] = "";
 				sf.m--;
 				continue;
 			}
-		} else if (sst->exclude->count(sf.full_keys[i]) != 0) {
+		} else if (sst->exclude->count(sf.full_keys[i]) != 0 && sf.full_keys[i] != "") {
 			sf.full_keys[i] = "";
 			sf.m--;
 			continue;
 		}
 
 		coerce_value(sf.full_keys[i], sf.full_values[i].type, sf.full_values[i].s, sst->attribute_types);
-		if (sf.full_values[i].type == mvt_null) {
-			sf.full_keys[i] = "";
-			sf.m--;
-		}
 	}
 
 	if (sst->filter != NULL) {
@@ -570,6 +566,13 @@ int serialize_feature(struct serialization_state *sst, serial_feature &sf) {
 		}
 	}
 
+	for (size_t i = 0; i < sf.full_keys.size(); i++) {
+		if (sf.full_values[i].type == mvt_null && sf.full_keys[i] != "") {
+			sf.full_keys[i] = "";
+			sf.m--;
+		}
+	}
+
 	if (!sst->filters) {
 		for (size_t i = 0; i < sf.full_keys.size(); i++) {
 			if (sf.full_keys[i].size() == 0) {
diff --git a/tests/feature-filter/filter b/tests/feature-filter/filter
new file mode 100644
index 00000000..170ee33c
--- /dev/null
+++ b/tests/feature-filter/filter
@@ -0,0 +1,133 @@
+{
+"layer2850085303": ["==", "foo", "bar"],
+"notlayer2850085303": [ "none", ["==", "foo", "bar"] ]
+,
+"layer1948775714": ["==", "foo", 0],
+"notlayer1948775714": [ "none", ["==", "foo", 0] ]
+,
+"layer220442869": ["==", "foo", null],
+"notlayer220442869": [ "none", ["==", "foo", null] ]
+,
+"layer1675768827": ["==", "$type", "LineString"],
+"notlayer1675768827": [ "none", ["==", "$type", "LineString"] ]
+,
+"layer827905613": ["==", "$id", 1234],
+"notlayer827905613": [ "none", ["==", "$id", 1234] ]
+,
+"layer442294443": ["!=", "foo", "bar"],
+"notlayer442294443": [ "none", ["!=", "foo", "bar"] ]
+,
+"layer1479822166": ["!=", "foo", 0],
+"notlayer1479822166": [ "none", ["!=", "foo", 0] ]
+,
+"layer1780490201": ["!=", "foo", null],
+"notlayer1780490201": [ "none", ["!=", "foo", null] ]
+,
+"layer1549998271": ["!=", "$type", "LineString"],
+"notlayer1549998271": [ "none", ["!=", "$type", "LineString"] ]
+,
+"layer2624681884": ["<", "foo", 0],
+"notlayer2624681884": [ "none", ["<", "foo", 0] ]
+,
+"layer2596070344": ["<", "foo", "0"],
+"notlayer2596070344": [ "none", ["<", "foo", "0"] ]
+,
+"layer4079511021": ["<=", "foo", 0],
+"notlayer4079511021": [ "none", ["<=", "foo", 0] ]
+,
+"layer1392333553": ["<=", "foo", "0"],
+"notlayer1392333553": [ "none", ["<=", "foo", "0"] ]
+,
+"layer4018549566": [">", "foo", 0],
+"notlayer4018549566": [ "none", [">", "foo", 0] ]
+,
+"layer3835447578": [">", "foo", "0"],
+"notlayer3835447578": [ "none", [">", "foo", "0"] ]
+,
+"layer4113007703": [">=", "foo", 0],
+"notlayer4113007703": [ "none", [">=", "foo", 0] ]
+,
+"layer4650955": [">=", "foo", "0"],
+"notlayer4650955": [ "none", [">=", "foo", "0"] ]
+,
+"layer1510660139": ["in", "foo"],
+"notlayer1510660139": [ "none", ["in", "foo"] ]
+,
+"layer2681700979": ["in", "foo", "0"],
+"notlayer2681700979": [ "none", ["in", "foo", "0"] ]
+,
+"layer328238911": ["in", "foo", 0],
+"notlayer328238911": [ "none", ["in", "foo", 0] ]
+,
+"layer584721662": ["in", "foo", null],
+"notlayer584721662": [ "none", ["in", "foo", null] ]
+,
+"layer464719784": ["in", "foo", 0, 1],
+"notlayer464719784": [ "none", ["in", "foo", 0, 1] ]
+,
+"layer1359089124": ["in", "$type", "LineString", "Polygon"],
+"notlayer1359089124": [ "none", ["in", "$type", "LineString", "Polygon"] ]
+,
+"layer3115744778": ["in", "$type", "Polygon", "LineString", "Point"],
+"notlayer3115744778": [ "none", ["in", "$type", "Polygon", "LineString", "Point"] ]
+,
+"layer262236988": ["!in", "foo"],
+"notlayer262236988": [ "none", ["!in", "foo"] ]
+,
+"layer3444677016": ["!in", "foo", "0"],
+"notlayer3444677016": [ "none", ["!in", "foo", "0"] ]
+,
+"layer3048837612": ["!in", "foo", 0],
+"notlayer3048837612": [ "none", ["!in", "foo", 0] ]
+,
+"layer3045031255": ["!in", "foo", null],
+"notlayer3045031255": [ "none", ["!in", "foo", null] ]
+,
+"layer2925029377": ["!in", "foo", 0, 1],
+"notlayer2925029377": [ "none", ["!in", "foo", 0, 1] ]
+,
+"layer2275670193": ["!in", "$type", "LineString", "Polygon"],
+"notlayer2275670193": [ "none", ["!in", "$type", "LineString", "Polygon"] ]
+,
+"layer4098096220": ["any"],
+"notlayer4098096220": [ "none", ["any"] ]
+,
+"layer3603116915": ["any", ["==", "foo", 1]],
+"notlayer3603116915": [ "none", ["any", ["==", "foo", 1]] ]
+,
+"layer3603115546": ["any", ["==", "foo", 0]],
+"notlayer3603115546": [ "none", ["any", ["==", "foo", 0]] ]
+,
+"layer4070554881": ["any", ["==", "foo", 0], ["==", "foo", 1]],
+"notlayer4070554881": [ "none", ["any", ["==", "foo", 0], ["==", "foo", 1]] ]
+,
+"layer4097977117": ["all"],
+"notlayer4097977117": [ "none", ["all"] ]
+,
+"layer2333216076": ["all", ["==", "foo", 1]],
+"notlayer2333216076": [ "none", ["all", ["==", "foo", 1]] ]
+,
+"layer2333214707": ["all", ["==", "foo", 0]],
+"notlayer2333214707": [ "none", ["all", ["==", "foo", 0]] ]
+,
+"layer1619469362": ["all", ["==", "foo", 0], ["==", "foo", 1]],
+"notlayer1619469362": [ "none", ["all", ["==", "foo", 0], ["==", "foo", 1]] ]
+,
+"layer2208582832": ["none"],
+"notlayer2208582832": [ "none", ["none"] ]
+,
+"layer3425959847": ["none", ["==", "foo", 1]],
+"notlayer3425959847": [ "none", ["none", ["==", "foo", 1]] ]
+,
+"layer3425958478": ["none", ["==", "foo", 0]],
+"notlayer3425958478": [ "none", ["none", ["==", "foo", 0]] ]
+,
+"layer253198869": ["none", ["==", "foo", 0], ["==", "foo", 1]],
+"notlayer253198869": [ "none", ["none", ["==", "foo", 0], ["==", "foo", 1]] ]
+,
+"layer938200568": ["has", "foo"],
+"notlayer938200568": [ "none", ["has", "foo"] ]
+,
+"layer1991184237": ["!has", "foo"],
+"notlayer1991184237": [ "none", ["!has", "foo"] ]
+}
diff --git a/tests/feature-filter/in.json b/tests/feature-filter/in.json
new file mode 100644
index 00000000..6f70aba3
--- /dev/null
+++ b/tests/feature-filter/in.json
@@ -0,0 +1,338 @@
+{ "type": "Feature", "tippecanoe": { "layer": "layer2850085303" }, "properties": {"foo": "bar", "rule": "\"properties\": {\"foo\": \"bar\"}, [\"==\", \"foo\", \"bar\"]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer2850085303" }, "properties": {"foo": "bar", "rule": "\"properties\": {\"foo\": \"bar\"}, [\"==\", \"foo\", \"bar\"]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer2850085303" }, "properties": {"foo": "baz", "rule": "not \"properties\": {\"foo\": \"baz\"}, [\"==\", \"foo\", \"bar\"]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer2850085303" }, "properties": {"foo": "baz", "rule": "not \"properties\": {\"foo\": \"baz\"}, [\"==\", \"foo\", \"bar\"]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1948775714" }, "properties": {"foo": 0, "rule": "\"properties\": {\"foo\": 0}, [\"==\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1948775714" }, "properties": {"foo": 0, "rule": "\"properties\": {\"foo\": 0}, [\"==\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1948775714" }, "properties": {"foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"==\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1948775714" }, "properties": {"foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"==\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1948775714" }, "properties": {"foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\"==\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1948775714" }, "properties": {"foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\"==\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1948775714" }, "properties": {"foo": true, "rule": "not \"properties\": {\"foo\": true}, [\"==\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1948775714" }, "properties": {"foo": true, "rule": "not \"properties\": {\"foo\": true}, [\"==\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1948775714" }, "properties": {"foo": false, "rule": "not \"properties\": {\"foo\": false}, [\"==\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1948775714" }, "properties": {"foo": false, "rule": "not \"properties\": {\"foo\": false}, [\"==\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1948775714" }, "properties": {"foo": null, "rule": "not \"properties\": {\"foo\": null}, [\"==\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1948775714" }, "properties": {"foo": null, "rule": "not \"properties\": {\"foo\": null}, [\"==\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1948775714" }, "properties": { "rule": "not \"properties\": {}, [\"==\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1948775714" }, "properties": { "rule": "not \"properties\": {}, [\"==\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer220442869" }, "properties": {"foo": 0, "rule": "not \"properties\": {\"foo\": 0}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer220442869" }, "properties": {"foo": 0, "rule": "not \"properties\": {\"foo\": 0}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer220442869" }, "properties": {"foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer220442869" }, "properties": {"foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer220442869" }, "properties": {"foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer220442869" }, "properties": {"foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer220442869" }, "properties": {"foo": true, "rule": "not \"properties\": {\"foo\": true}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer220442869" }, "properties": {"foo": true, "rule": "not \"properties\": {\"foo\": true}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer220442869" }, "properties": {"foo": false, "rule": "not \"properties\": {\"foo\": false}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer220442869" }, "properties": {"foo": false, "rule": "not \"properties\": {\"foo\": false}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer220442869" }, "properties": {"foo": null, "rule": "\"properties\": {\"foo\": null}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer220442869" }, "properties": {"foo": null, "rule": "\"properties\": {\"foo\": null}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer220442869" }, "properties": { "rule": "not \"properties\": {}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer220442869" }, "properties": { "rule": "not \"properties\": {}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer827905613" }, "properties": {"id": 1234, "rule": "not \"properties\": {\"id\": 1234}, [\"==\", \"$id\", 1234]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer827905613" }, "properties": {"id": 1234, "rule": "not \"properties\": {\"id\": 1234}, [\"==\", \"$id\", 1234]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer442294443" }, "properties": {"foo": "bar", "rule": "not \"properties\": {\"foo\": \"bar\"}, [\"!=\", \"foo\", \"bar\"]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer442294443" }, "properties": {"foo": "bar", "rule": "not \"properties\": {\"foo\": \"bar\"}, [\"!=\", \"foo\", \"bar\"]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer442294443" }, "properties": {"foo": "baz", "rule": "\"properties\": {\"foo\": \"baz\"}, [\"!=\", \"foo\", \"bar\"]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer442294443" }, "properties": {"foo": "baz", "rule": "\"properties\": {\"foo\": \"baz\"}, [\"!=\", \"foo\", \"bar\"]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1479822166" }, "properties": {"foo": 0, "rule": "not \"properties\": {\"foo\": 0}, [\"!=\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1479822166" }, "properties": {"foo": 0, "rule": "not \"properties\": {\"foo\": 0}, [\"!=\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1479822166" }, "properties": {"foo": 1, "rule": "\"properties\": {\"foo\": 1}, [\"!=\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1479822166" }, "properties": {"foo": 1, "rule": "\"properties\": {\"foo\": 1}, [\"!=\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1479822166" }, "properties": {"foo": "0", "rule": "\"properties\": {\"foo\": \"0\"}, [\"!=\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1479822166" }, "properties": {"foo": "0", "rule": "\"properties\": {\"foo\": \"0\"}, [\"!=\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1479822166" }, "properties": {"foo": true, "rule": "\"properties\": {\"foo\": true}, [\"!=\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1479822166" }, "properties": {"foo": true, "rule": "\"properties\": {\"foo\": true}, [\"!=\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1479822166" }, "properties": {"foo": false, "rule": "\"properties\": {\"foo\": false}, [\"!=\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1479822166" }, "properties": {"foo": false, "rule": "\"properties\": {\"foo\": false}, [\"!=\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1479822166" }, "properties": {"foo": null, "rule": "\"properties\": {\"foo\": null}, [\"!=\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1479822166" }, "properties": {"foo": null, "rule": "\"properties\": {\"foo\": null}, [\"!=\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1479822166" }, "properties": { "rule": "\"properties\": {}, [\"!=\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1479822166" }, "properties": { "rule": "\"properties\": {}, [\"!=\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1780490201" }, "properties": {"foo": 0, "rule": "\"properties\": {\"foo\": 0}, [\"!=\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1780490201" }, "properties": {"foo": 0, "rule": "\"properties\": {\"foo\": 0}, [\"!=\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
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diff --git a/tests/feature-filter/out/-z0_-Jtests%feature-filter%filter.json b/tests/feature-filter/out/-z0_-Jtests%feature-filter%filter.json
new file mode 100644
index 00000000..1b6a5997
--- /dev/null
+++ b/tests/feature-filter/out/-z0_-Jtests%feature-filter%filter.json
@@ -0,0 +1,478 @@
+{ "type": "FeatureCollection", "properties": {
+"bounds": "0.000000,0.000000,0.000000,0.000000",
+"center": "0.000000,0.000000,0",
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+{ "type": "Feature", "properties": { "foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"<\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": 0, "rule": "not \"properties\": {\"foo\": 0}, [\"<\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "1", "rule": "not \"properties\": {\"foo\": \"1\"}, [\"<\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\"<\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "-1", "rule": "not \"properties\": {\"foo\": \"-1\"}, [\"<\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": true, "rule": "not \"properties\": {\"foo\": true}, [\"<\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": false, "rule": "not \"properties\": {\"foo\": false}, [\"<\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {\"foo\": null}, [\"<\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {}, [\"<\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer2681700979", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": 0, "rule": "not \"properties\": {\"foo\": 0}, [\"in\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": true, "rule": "not \"properties\": {\"foo\": true}, [\"in\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": false, "rule": "not \"properties\": {\"foo\": false}, [\"in\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {\"foo\": null}, [\"in\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {}, [\"in\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer2850085303", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": "baz", "rule": "not \"properties\": {\"foo\": \"baz\"}, [\"==\", \"foo\", \"bar\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer2925029377", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": 0, "rule": "not \"properties\": {\"foo\": 0}, [\"!in\", \"foo\", 0, 1]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"!in\", \"foo\", 0, 1]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer3045031255", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {\"foo\": null}, [\"!in\", \"foo\", null]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer3048837612", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": 0, "rule": "not \"properties\": {\"foo\": 0}, [\"!in\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer328238911", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\"in\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": true, "rule": "not \"properties\": {\"foo\": true}, [\"in\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": false, "rule": "not \"properties\": {\"foo\": false}, [\"in\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {\"foo\": null}, [\"in\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer3425959847", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"none\", [\"==\", \"foo\", 1]]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer3444677016", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\"!in\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer3603115546", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"any\", [\"==\", \"foo\", 0]]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer3835447578", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": -1, "rule": "not \"properties\": {\"foo\": -1}, [\">\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": 0, "rule": "not \"properties\": {\"foo\": 0}, [\">\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\">\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\">\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "-1", "rule": "not \"properties\": {\"foo\": \"-1\"}, [\">\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": true, "rule": "not \"properties\": {\"foo\": true}, [\">\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": false, "rule": "not \"properties\": {\"foo\": false}, [\">\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {\"foo\": null}, [\">\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer4018549566", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": 0, "rule": "not \"properties\": {\"foo\": 0}, [\">\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": -1, "rule": "not \"properties\": {\"foo\": -1}, [\">\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "1", "rule": "not \"properties\": {\"foo\": \"1\"}, [\">\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\">\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "-1", "rule": "not \"properties\": {\"foo\": \"-1\"}, [\">\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": true, "rule": "not \"properties\": {\"foo\": true}, [\">\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": false, "rule": "not \"properties\": {\"foo\": false}, [\">\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {\"foo\": null}, [\">\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {}, [\">\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer4079511021", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"<=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "1", "rule": "not \"properties\": {\"foo\": \"1\"}, [\"<=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\"<=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "-1", "rule": "not \"properties\": {\"foo\": \"-1\"}, [\"<=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": true, "rule": "not \"properties\": {\"foo\": true}, [\"<=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": false, "rule": "not \"properties\": {\"foo\": false}, [\"<=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {\"foo\": null}, [\"<=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {}, [\"<=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer4098096220", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"any\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer4113007703", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": -1, "rule": "not \"properties\": {\"foo\": -1}, [\">=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "1", "rule": "not \"properties\": {\"foo\": \"1\"}, [\">=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\">=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "-1", "rule": "not \"properties\": {\"foo\": \"-1\"}, [\">=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": true, "rule": "not \"properties\": {\"foo\": true}, [\">=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": false, "rule": "not \"properties\": {\"foo\": false}, [\">=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {\"foo\": null}, [\">=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {}, [\">=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer442294443", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": "bar", "rule": "not \"properties\": {\"foo\": \"bar\"}, [\"!=\", \"foo\", \"bar\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer464719784", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": 3, "rule": "not \"properties\": {\"foo\": 3}, [\"in\", \"foo\", 0, 1]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer4650955", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": -1, "rule": "not \"properties\": {\"foo\": -1}, [\">=\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": 0, "rule": "not \"properties\": {\"foo\": 0}, [\">=\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\">=\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "-1", "rule": "not \"properties\": {\"foo\": \"-1\"}, [\">=\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": true, "rule": "not \"properties\": {\"foo\": true}, [\">=\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": false, "rule": "not \"properties\": {\"foo\": false}, [\">=\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {\"foo\": null}, [\">=\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer584721662", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": 0, "rule": "not \"properties\": {\"foo\": 0}, [\"in\", \"foo\", null]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\"in\", \"foo\", null]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": true, "rule": "not \"properties\": {\"foo\": true}, [\"in\", \"foo\", null]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": false, "rule": "not \"properties\": {\"foo\": false}, [\"in\", \"foo\", null]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer827905613", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "id": 1234, "rule": "not \"properties\": {\"id\": 1234}, [\"==\", \"$id\", 1234]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer938200568", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {}, [\"has\", \"foo\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+] }
+] }
diff --git a/tests/make-filter-test b/tests/make-filter-test
new file mode 100755
index 00000000..24f148d6
--- /dev/null
+++ b/tests/make-filter-test
@@ -0,0 +1,77 @@
+#!/usr/bin/perl
+
+use strict;
+
+open(GEOJSON, ">feature-filter/in.json");
+open(FILTER, ">feature-filter/filter");
+
+sub calchash {
+	my $h = 0;
+	my $s = $_[0];
+	while ($s =~ s/^(.)//) {
+		$h = ($h * 37 + ord($1)) & ((1 << 32) - 1);
+	}
+	return $h;
+}
+
+my $filter = "";
+my $hash = 0;
+
+print FILTER "{\n";
+my $first = 1;
+
+open(IN, "../../mapbox-gl-js/test/unit/style-spec/feature_filter.test.js");
+while (<IN>) {
+	if (/const f[0-9]* = filter\((.*)\);/) {
+		$filter = $1;
+		$filter =~ s/'/"/g;
+		$hash = "layer" . calchash($filter);
+
+		unless ($filter =~ /apply/) {
+			if ($first) {
+				$first = 0;
+			} else {
+				print FILTER ",\n";
+			}
+
+			print FILTER "\"$hash\": $filter,\n";
+			print FILTER "\"not$hash\": [ \"none\", $filter ]\n";
+		}
+	}
+
+	if (/t.equal\(f[0-9]*\({(.*)}\), ([a-z]+)\);/) {
+		unless ($filter =~ /apply/) {
+			my $prop = $1;
+			my $matched = $2;
+
+			if ($prop =~ /properties/) {
+				next if $prop =~ /undefined/;
+
+				$prop =~ s/properties/"properties"/g;
+				$prop =~ s/foo/"foo"/g;
+				$prop =~ s/id/"id"/g;
+				$prop =~ s/undefined/null/g;
+				$prop =~ s/'/"/g;
+
+				my $qprop = "$prop, $filter";
+				$qprop =~ s/"/\\"/g;
+
+				if ($matched eq "true") {
+					$prop =~ s/}/, \"rule\": \"$qprop\"}/;
+					$prop =~ s/^"properties": {,/"properties": {/;
+
+					print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"$hash\" }, $prop, \"geometry\": { \"type\": \"Point\", \"coordinates\": [ 0, 0 ] } }\n";
+					print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"not$hash\" }, $prop, \"geometry\": { \"type\": \"Point\", \"coordinates\": [ -100, 0 ] } }\n";
+				} else {
+					$prop =~ s/}/, \"rule\": \"not $qprop\"}/;
+					$prop =~ s/^"properties": {,/"properties": {/;
+
+					print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"not$hash\" }, $prop, \"geometry\": { \"type\": \"Point\", \"coordinates\": [ 0, 0 ] } }\n";
+					print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"$hash\" }, $prop, \"geometry\": { \"type\": \"Point\", \"coordinates\": [ -100, 0 ] } }\n";
+				}
+			}
+		}
+	}
+}
+
+print FILTER "}\n";

From 8d502eb805c300fe1f29d669c25b367d349bfa91 Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Fri, 1 Sep 2017 16:41:01 -0700
Subject: [PATCH 11/17] Fix memory leak

---
 main.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/main.cpp b/main.cpp
index 5d0f9a5f..fffaea1f 100644
--- a/main.cpp
+++ b/main.cpp
@@ -2697,6 +2697,10 @@ int main(int argc, char **argv) {
 		exit(EXIT_FAILURE);
 	}
 
+	if (filter != NULL) {
+		json_free(filter);
+	}
+
 	return ret;
 }
 

From 681907e88d4accdb9cf0b1a3924076a79bc2cf1c Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Fri, 1 Sep 2017 16:53:19 -0700
Subject: [PATCH 12/17] Add the feature ID filter tests

---
 tests/feature-filter/in.json                  |  4 ++++
 .../-z0_-Jtests%feature-filter%filter.json    |  8 +++++++-
 tests/make-filter-test                        | 19 +++++++++++++++++++
 3 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/tests/feature-filter/in.json b/tests/feature-filter/in.json
index 6f70aba3..d5cb3d1c 100644
--- a/tests/feature-filter/in.json
+++ b/tests/feature-filter/in.json
@@ -30,6 +30,10 @@
 { "type": "Feature", "tippecanoe": { "layer": "notlayer220442869" }, "properties": {"foo": null, "rule": "\"properties\": {\"foo\": null}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "notlayer220442869" }, "properties": { "rule": "not \"properties\": {}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "layer220442869" }, "properties": { "rule": "not \"properties\": {}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer827905613" }, "id": 1234, "properties": { "rule": "\"id\": 1234, [\"==\", \"$id\", 1234]" }, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer827905613" }, "id": 1234, "properties": { "rule": "\"id\": 1234, [\"==\", \"$id\", 1234]" }, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer827905613" }, "id": "1234", "properties": { "rule": "not \"id\": \"1234\", [\"==\", \"$id\", 1234]" }, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer827905613" }, "id": "1234", "properties": { "rule": "not \"id\": \"1234\", [\"==\", \"$id\", 1234]" }, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "notlayer827905613" }, "properties": {"id": 1234, "rule": "not \"properties\": {\"id\": 1234}, [\"==\", \"$id\", 1234]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "layer827905613" }, "properties": {"id": 1234, "rule": "not \"properties\": {\"id\": 1234}, [\"==\", \"$id\", 1234]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "notlayer442294443" }, "properties": {"foo": "bar", "rule": "not \"properties\": {\"foo\": \"bar\"}, [\"!=\", \"foo\", \"bar\"]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
diff --git a/tests/feature-filter/out/-z0_-Jtests%feature-filter%filter.json b/tests/feature-filter/out/-z0_-Jtests%feature-filter%filter.json
index 1b6a5997..50a536aa 100644
--- a/tests/feature-filter/out/-z0_-Jtests%feature-filter%filter.json
+++ b/tests/feature-filter/out/-z0_-Jtests%feature-filter%filter.json
@@ -3,7 +3,7 @@
 "center": "0.000000,0.000000,0",
 "description": "tests/feature-filter/out/-z0_-Jtests%feature-filter%filter.json.check.mbtiles",
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 "maxzoom": "0",
 "minzoom": "0",
 "name": "tests/feature-filter/out/-z0_-Jtests%feature-filter%filter.json.check.mbtiles",
@@ -169,6 +169,10 @@
 { "type": "Feature", "properties": { "rule": "\"properties\": {\"foo\": null}, [\"in\", \"foo\", null]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
 ] }
 ,
+{ "type": "FeatureCollection", "properties": { "layer": "layer827905613", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "id": 1234, "properties": { "rule": "\"id\": 1234, [\"==\", \"$id\", 1234]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
 { "type": "FeatureCollection", "properties": { "layer": "layer938200568", "version": 2, "extent": 4096 }, "features": [
 { "type": "Feature", "properties": { "foo": 0, "rule": "\"properties\": {\"foo\": 0}, [\"has\", \"foo\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
 ,
@@ -468,6 +472,8 @@
 ] }
 ,
 { "type": "FeatureCollection", "properties": { "layer": "notlayer827905613", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "rule": "not \"id\": \"1234\", [\"==\", \"$id\", 1234]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
 { "type": "Feature", "properties": { "id": 1234, "rule": "not \"properties\": {\"id\": 1234}, [\"==\", \"$id\", 1234]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
 ] }
 ,
diff --git a/tests/make-filter-test b/tests/make-filter-test
index 24f148d6..61689ce2 100755
--- a/tests/make-filter-test
+++ b/tests/make-filter-test
@@ -69,6 +69,25 @@ while (<IN>) {
 					print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"not$hash\" }, $prop, \"geometry\": { \"type\": \"Point\", \"coordinates\": [ 0, 0 ] } }\n";
 					print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"$hash\" }, $prop, \"geometry\": { \"type\": \"Point\", \"coordinates\": [ -100, 0 ] } }\n";
 				}
+			} elsif ($prop =~ /id/) {
+				$prop =~ s/id/"id"/g;
+				$prop =~ s/'/"/g;
+
+				my $qprop = "$prop, $filter";
+				$qprop =~ s/"/\\"/g;
+
+				if ($matched eq "true") {
+					$qprop = "\"properties\": { \"rule\": \"$qprop\" }";
+
+					print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"$hash\" }, $prop, $qprop, \"geometry\": { \"type\": \"Point\", \"coordinates\": [ 0, 0 ] } }\n";
+					print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"not$hash\" }, $prop, $qprop, \"geometry\": { \"type\": \"Point\", \"coordinates\": [ -100, 0 ] } }\n";
+				} else {
+					$qprop = "\"properties\": { \"rule\": \"not $qprop\" }";
+
+					print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"not$hash\" }, $prop, $qprop, \"geometry\": { \"type\": \"Point\", \"coordinates\": [ 0, 0 ] } }\n";
+					print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"$hash\" }, $prop, $qprop, \"geometry\": { \"type\": \"Point\", \"coordinates\": [ -100, 0 ] } }\n";
+				}
+
 			}
 		}
 	}

From 86ff2216634d49d22c8fdd3b14b87b54e29a4c54 Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Fri, 1 Sep 2017 17:12:16 -0700
Subject: [PATCH 13/17] I think this should fix the access to already-freed
 memory

Also drop the reference to the JSON parser when disconnecting
a JSON object from the parse tree.
---
 jsonpull/jsonpull.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/jsonpull/jsonpull.c b/jsonpull/jsonpull.c
index 3067f4fe..78e6472a 100644
--- a/jsonpull/jsonpull.c
+++ b/jsonpull/jsonpull.c
@@ -708,6 +708,21 @@ void json_free(json_object *o) {
 	free(o);
 }
 
+static void json_disconnect_parser(json_object *o) {
+	if (o->type == JSON_HASH) {
+		for (size_t i = 0; i < o->length; i++) {
+			json_disconnect_parser(o->keys[i]);
+			json_disconnect_parser(o->values[i]);
+		}
+	} else if (o->type == JSON_ARRAY) {
+		for (size_t i = 0; i < o->length; i++) {
+			json_disconnect_parser(o->array[i]);
+		}
+	}
+
+	o->parser = NULL;
+}
+
 void json_disconnect(json_object *o) {
 	// Expunge references to this as an array element
 	// or a hash key or value.
@@ -761,6 +776,7 @@ void json_disconnect(json_object *o) {
 		o->parser->root = NULL;
 	}
 
+	json_disconnect_parser(o);
 	o->parent = NULL;
 }
 

From 7b71f41e43e522d2070758729d799f639cdaa0b8 Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Fri, 1 Sep 2017 17:36:43 -0700
Subject: [PATCH 14/17] Fix compiler warnings

---
 geobuf.cpp          | 2 +-
 jsonpull/jsonpull.c | 6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/geobuf.cpp b/geobuf.cpp
index e5f0b66d..d83630fd 100644
--- a/geobuf.cpp
+++ b/geobuf.cpp
@@ -204,7 +204,7 @@ std::vector<drawvec_type> readGeometry(protozero::pbf_reader &pbf, size_t dim, d
 	std::vector<drawvec_type> ret;
 	std::vector<long long> coords;
 	std::vector<int> lengths;
-	int type;
+	int type = -1;
 
 	while (pbf.next()) {
 		switch (pbf.tag()) {
diff --git a/jsonpull/jsonpull.c b/jsonpull/jsonpull.c
index 78e6472a..c214e68e 100644
--- a/jsonpull/jsonpull.c
+++ b/jsonpull/jsonpull.c
@@ -710,12 +710,14 @@ void json_free(json_object *o) {
 
 static void json_disconnect_parser(json_object *o) {
 	if (o->type == JSON_HASH) {
-		for (size_t i = 0; i < o->length; i++) {
+		size_t i;
+		for (i = 0; i < o->length; i++) {
 			json_disconnect_parser(o->keys[i]);
 			json_disconnect_parser(o->values[i]);
 		}
 	} else if (o->type == JSON_ARRAY) {
-		for (size_t i = 0; i < o->length; i++) {
+		size_t i;
+		for (i = 0; i < o->length; i++) {
 			json_disconnect_parser(o->array[i]);
 		}
 	}

From d349b7700dadf9cf4fd0fd385acdc814e78bc598 Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Tue, 5 Sep 2017 12:17:23 -0700
Subject: [PATCH 15/17] Add the tests for filtering for feature type

---
 tests/feature-filter/in.json                  | 26 ++++++++++
 .../-z0_-Jtests%feature-filter%filter.json    | 48 ++++++++++++++++++-
 tests/make-filter-test                        | 38 +++++++++++++++
 3 files changed, 110 insertions(+), 2 deletions(-)

diff --git a/tests/feature-filter/in.json b/tests/feature-filter/in.json
index d5cb3d1c..e1cc460f 100644
--- a/tests/feature-filter/in.json
+++ b/tests/feature-filter/in.json
@@ -30,6 +30,10 @@
 { "type": "Feature", "tippecanoe": { "layer": "notlayer220442869" }, "properties": {"foo": null, "rule": "\"properties\": {\"foo\": null}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "notlayer220442869" }, "properties": { "rule": "not \"properties\": {}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "layer220442869" }, "properties": { "rule": "not \"properties\": {}, [\"==\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1675768827" }, "properties": { "rule": "not type: 1, [\"==\", \"$type\", \"LineString\"]" }, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1675768827" }, "properties": { "rule": "not type: 1, [\"==\", \"$type\", \"LineString\"]" }, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1675768827" }, "properties": { "rule": "type: 2, [\"==\", \"$type\", \"LineString\"]" }, "geometry": { "type": "LineString", "coordinates": [ [ 0, 0 ], [ 1, 1 ] ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1675768827" }, "properties": { "rule": "type: 2, [\"==\", \"$type\", \"LineString\"]" }, "geometry": { "type": "LineString", "coordinates": [ [ -100, 0 ], [ -101, 1 ] ] } }
 { "type": "Feature", "tippecanoe": { "layer": "layer827905613" }, "id": 1234, "properties": { "rule": "\"id\": 1234, [\"==\", \"$id\", 1234]" }, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "notlayer827905613" }, "id": 1234, "properties": { "rule": "\"id\": 1234, [\"==\", \"$id\", 1234]" }, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "notlayer827905613" }, "id": "1234", "properties": { "rule": "not \"id\": \"1234\", [\"==\", \"$id\", 1234]" }, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
@@ -68,6 +72,10 @@
 { "type": "Feature", "tippecanoe": { "layer": "layer1780490201" }, "properties": {"foo": null, "rule": "not \"properties\": {\"foo\": null}, [\"!=\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "layer1780490201" }, "properties": { "rule": "\"properties\": {}, [\"!=\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "notlayer1780490201" }, "properties": { "rule": "\"properties\": {}, [\"!=\", \"foo\", null]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1549998271" }, "properties": { "rule": "type: 1, [\"!=\", \"$type\", \"LineString\"]" }, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1549998271" }, "properties": { "rule": "type: 1, [\"!=\", \"$type\", \"LineString\"]" }, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1549998271" }, "properties": { "rule": "not type: 2, [\"!=\", \"$type\", \"LineString\"]" }, "geometry": { "type": "LineString", "coordinates": [ [ 0, 0 ], [ 1, 1 ] ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1549998271" }, "properties": { "rule": "not type: 2, [\"!=\", \"$type\", \"LineString\"]" }, "geometry": { "type": "LineString", "coordinates": [ [ -100, 0 ], [ -101, 1 ] ] } }
 { "type": "Feature", "tippecanoe": { "layer": "notlayer2624681884" }, "properties": {"foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"<\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "layer2624681884" }, "properties": {"foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"<\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "notlayer2624681884" }, "properties": {"foo": 0, "rule": "not \"properties\": {\"foo\": 0}, [\"<\", \"foo\", 0]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
@@ -260,6 +268,18 @@
 { "type": "Feature", "tippecanoe": { "layer": "notlayer464719784" }, "properties": {"foo": 1, "rule": "\"properties\": {\"foo\": 1}, [\"in\", \"foo\", 0, 1]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "notlayer464719784" }, "properties": {"foo": 3, "rule": "not \"properties\": {\"foo\": 3}, [\"in\", \"foo\", 0, 1]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "layer464719784" }, "properties": {"foo": 3, "rule": "not \"properties\": {\"foo\": 3}, [\"in\", \"foo\", 0, 1]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1359089124" }, "properties": { "rule": "not type: 1, [\"in\", \"$type\", \"LineString\", \"Polygon\"]" }, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1359089124" }, "properties": { "rule": "not type: 1, [\"in\", \"$type\", \"LineString\", \"Polygon\"]" }, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1359089124" }, "properties": { "rule": "type: 2, [\"in\", \"$type\", \"LineString\", \"Polygon\"]" }, "geometry": { "type": "LineString", "coordinates": [ [ 0, 0 ], [ 1, 1 ] ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1359089124" }, "properties": { "rule": "type: 2, [\"in\", \"$type\", \"LineString\", \"Polygon\"]" }, "geometry": { "type": "LineString", "coordinates": [ [ -100, 0 ], [ -101, 1 ] ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer1359089124" }, "properties": { "rule": "type: 3, [\"in\", \"$type\", \"LineString\", \"Polygon\"]" }, "geometry": { "type": "Polygon", "coordinates": [ [ [ 0, 0 ], [ 1, 1 ], [ 1, 0 ], [ 0, 0 ] ] ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer1359089124" }, "properties": { "rule": "type: 3, [\"in\", \"$type\", \"LineString\", \"Polygon\"]" }, "geometry": { "type": "Polygon", "coordinates": [ [ [ -100, 0 ], [ -101, 1 ], [ -101, 0 ], [-100, 0 ] ] ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer3115744778" }, "properties": { "rule": "type: 1, [\"in\", \"$type\", \"Polygon\", \"LineString\", \"Point\"]" }, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer3115744778" }, "properties": { "rule": "type: 1, [\"in\", \"$type\", \"Polygon\", \"LineString\", \"Point\"]" }, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer3115744778" }, "properties": { "rule": "type: 2, [\"in\", \"$type\", \"Polygon\", \"LineString\", \"Point\"]" }, "geometry": { "type": "LineString", "coordinates": [ [ 0, 0 ], [ 1, 1 ] ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer3115744778" }, "properties": { "rule": "type: 2, [\"in\", \"$type\", \"Polygon\", \"LineString\", \"Point\"]" }, "geometry": { "type": "LineString", "coordinates": [ [ -100, 0 ], [ -101, 1 ] ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer3115744778" }, "properties": { "rule": "type: 3, [\"in\", \"$type\", \"Polygon\", \"LineString\", \"Point\"]" }, "geometry": { "type": "Polygon", "coordinates": [ [ [ 0, 0 ], [ 1, 1 ], [ 1, 0 ], [ 0, 0 ] ] ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer3115744778" }, "properties": { "rule": "type: 3, [\"in\", \"$type\", \"Polygon\", \"LineString\", \"Point\"]" }, "geometry": { "type": "Polygon", "coordinates": [ [ [ -100, 0 ], [ -101, 1 ], [ -101, 0 ], [-100, 0 ] ] ] } }
 { "type": "Feature", "tippecanoe": { "layer": "layer262236988" }, "properties": {"foo": 1, "rule": "\"properties\": {\"foo\": 1}, [\"!in\", \"foo\"]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "notlayer262236988" }, "properties": {"foo": 1, "rule": "\"properties\": {\"foo\": 1}, [\"!in\", \"foo\"]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "layer3444677016" }, "properties": {"foo": 0, "rule": "\"properties\": {\"foo\": 0}, [\"!in\", \"foo\", \"0\"]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
@@ -288,6 +308,12 @@
 { "type": "Feature", "tippecanoe": { "layer": "layer2925029377" }, "properties": {"foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"!in\", \"foo\", 0, 1]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "layer2925029377" }, "properties": {"foo": 3, "rule": "\"properties\": {\"foo\": 3}, [\"!in\", \"foo\", 0, 1]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "notlayer2925029377" }, "properties": {"foo": 3, "rule": "\"properties\": {\"foo\": 3}, [\"!in\", \"foo\", 0, 1]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer2275670193" }, "properties": { "rule": "type: 1, [\"!in\", \"$type\", \"LineString\", \"Polygon\"]" }, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer2275670193" }, "properties": { "rule": "type: 1, [\"!in\", \"$type\", \"LineString\", \"Polygon\"]" }, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer2275670193" }, "properties": { "rule": "not type: 2, [\"!in\", \"$type\", \"LineString\", \"Polygon\"]" }, "geometry": { "type": "LineString", "coordinates": [ [ 0, 0 ], [ 1, 1 ] ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer2275670193" }, "properties": { "rule": "not type: 2, [\"!in\", \"$type\", \"LineString\", \"Polygon\"]" }, "geometry": { "type": "LineString", "coordinates": [ [ -100, 0 ], [ -101, 1 ] ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "notlayer2275670193" }, "properties": { "rule": "not type: 3, [\"!in\", \"$type\", \"LineString\", \"Polygon\"]" }, "geometry": { "type": "Polygon", "coordinates": [ [ [ 0, 0 ], [ 1, 1 ], [ 1, 0 ], [ 0, 0 ] ] ] } }
+{ "type": "Feature", "tippecanoe": { "layer": "layer2275670193" }, "properties": { "rule": "not type: 3, [\"!in\", \"$type\", \"LineString\", \"Polygon\"]" }, "geometry": { "type": "Polygon", "coordinates": [ [ [ -100, 0 ], [ -101, 1 ], [ -101, 0 ], [-100, 0 ] ] ] } }
 { "type": "Feature", "tippecanoe": { "layer": "notlayer4098096220" }, "properties": {"foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"any\"]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "layer4098096220" }, "properties": {"foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"any\"]"}, "geometry": { "type": "Point", "coordinates": [ -100, 0 ] } }
 { "type": "Feature", "tippecanoe": { "layer": "layer3603116915" }, "properties": {"foo": 1, "rule": "\"properties\": {\"foo\": 1}, [\"any\", [\"==\", \"foo\", 1]]"}, "geometry": { "type": "Point", "coordinates": [ 0, 0 ] } }
diff --git a/tests/feature-filter/out/-z0_-Jtests%feature-filter%filter.json b/tests/feature-filter/out/-z0_-Jtests%feature-filter%filter.json
index 50a536aa..1ec9a31d 100644
--- a/tests/feature-filter/out/-z0_-Jtests%feature-filter%filter.json
+++ b/tests/feature-filter/out/-z0_-Jtests%feature-filter%filter.json
@@ -1,9 +1,9 @@
 { "type": "FeatureCollection", "properties": {
-"bounds": "0.000000,0.000000,0.000000,0.000000",
+"bounds": "0.000000,0.000000,1.000000,1.000000",
 "center": "0.000000,0.000000,0",
 "description": "tests/feature-filter/out/-z0_-Jtests%feature-filter%filter.json.check.mbtiles",
 "format": "pbf",
-"json": "{\"vector_layers\": [ { \"id\": \"layer1392333553\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {\"foo\": \"String\", \"rule\": \"String\"} }, { \"id\": \"layer1479822166\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {\"foo\": \"Mixed\", \"rule\": \"String\"} }, { \"id\": \"layer1510660139\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {} }, { \"id\": \"layer1619469362\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {} }, { \"id\": \"layer1780490201\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {\"foo\": \"Mixed\", \"rule\": \"String\"} }, { \"id\": \"layer1948775714\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {\"foo\": \"Number\", \"rule\": \"String\"} }, { \"id\": \"layer1991184237\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {\"rule\": \"String\"} }, { \"id\": \"layer220442869\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {\"rule\": \"String\"} }, { \"id\": \"layer2208582832\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {\"foo\": \"Number\", \"rule\": \"String\"} }, { \"id\": \"layer2333214707\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {} }, { \"id\": \"layer2333216076\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {\"foo\": \"Number\", \"rule\": \"String\"} }, { \"id\": \"layer253198869\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {} }, { \"id\": \"layer2596070344\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {\"foo\": \"String\", \"rule\": \"String\"} }, { \"id\": \"layer262236988\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {\"foo\": \"Number\", \"rule\": \"String\"} }, { \"id\": \"layer2624681884\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {\"foo\": \"Number\", \"rule\": \"String\"} }, { \"id\": \"layer2681700979\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {\"foo\": \"String\", \"rule\": \"String\"} }, { \"id\": \"layer2850085303\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {\"foo\": \"String\", \"rule\": \"String\"} }, { \"id\": \"layer2925029377\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {\"foo\": \"Number\", \"rule\": \"String\"} }, { \"id\": \"layer3045031255\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {\"foo\": \"Mixed\", \"rule\": \"String\"} }, { \"id\": \"layer3048837612\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {\"foo\": \"String\", \"rule\": \"String\"} }, { \"id\": \"layer328238911\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {\"foo\": \"Number\", \"rule\": \"String\"} }, { \"id\": \"layer3425958478\", \"description\": \"\", \"minzoom\": 0, \"maxzoom\": 0, \"fields\": {\"foo\": \"Number\", \"rule\": 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\"rule\",\"count\": 1,\"type\": \"string\",\"values\": [\"not \\\"properties\\\": {\\\"foo\\\": \\\"bar\\\"}, [\\\"!=\\\", \\\"foo\\\", \\\"bar\\\"]\"]}]},{\"layer\": \"notlayer464719784\",\"count\": 3,\"geometry\": \"Point\",\"attributeCount\": 2,\"attributes\": [{\"attribute\": \"foo\",\"count\": 1,\"type\": \"number\",\"values\": [3],\"min\": 3,\"max\": 3},{\"attribute\": \"rule\",\"count\": 1,\"type\": \"string\",\"values\": [\"not \\\"properties\\\": {\\\"foo\\\": 3}, [\\\"in\\\", \\\"foo\\\", 0, 1]\"]}]},{\"layer\": \"notlayer4650955\",\"count\": 9,\"geometry\": \"Point\",\"attributeCount\": 2,\"attributes\": [{\"attribute\": \"foo\",\"count\": 6,\"type\": \"mixed\",\"values\": [\"-1\",-1,0,1,false,true],\"min\": -1,\"max\": 1},{\"attribute\": \"rule\",\"count\": 7,\"type\": \"string\",\"values\": [\"not \\\"properties\\\": {\\\"foo\\\": \\\"-1\\\"}, [\\\">=\\\", \\\"foo\\\", \\\"0\\\"]\",\"not \\\"properties\\\": {\\\"foo\\\": -1}, [\\\">=\\\", \\\"foo\\\", \\\"0\\\"]\",\"not \\\"properties\\\": {\\\"foo\\\": 0}, [\\\">=\\\", \\\"foo\\\", \\\"0\\\"]\",\"not \\\"properties\\\": {\\\"foo\\\": 1}, [\\\">=\\\", \\\"foo\\\", \\\"0\\\"]\",\"not \\\"properties\\\": {\\\"foo\\\": false}, [\\\">=\\\", \\\"foo\\\", \\\"0\\\"]\",\"not \\\"properties\\\": {\\\"foo\\\": null}, [\\\">=\\\", \\\"foo\\\", \\\"0\\\"]\",\"not \\\"properties\\\": {\\\"foo\\\": true}, [\\\">=\\\", \\\"foo\\\", \\\"0\\\"]\"]}]},{\"layer\": \"notlayer584721662\",\"count\": 5,\"geometry\": \"Point\",\"attributeCount\": 2,\"attributes\": [{\"attribute\": \"foo\",\"count\": 4,\"type\": \"mixed\",\"values\": [\"0\",0,false,true],\"min\": 0,\"max\": 0},{\"attribute\": \"rule\",\"count\": 4,\"type\": \"string\",\"values\": [\"not \\\"properties\\\": {\\\"foo\\\": \\\"0\\\"}, [\\\"in\\\", \\\"foo\\\", null]\",\"not \\\"properties\\\": {\\\"foo\\\": 0}, [\\\"in\\\", \\\"foo\\\", null]\",\"not \\\"properties\\\": {\\\"foo\\\": false}, [\\\"in\\\", \\\"foo\\\", null]\",\"not \\\"properties\\\": {\\\"foo\\\": true}, [\\\"in\\\", \\\"foo\\\", null]\"]}]},{\"layer\": \"notlayer827905613\",\"count\": 3,\"geometry\": \"Point\",\"attributeCount\": 2,\"attributes\": [{\"attribute\": \"id\",\"count\": 1,\"type\": \"number\",\"values\": [1234],\"min\": 1234,\"max\": 1234},{\"attribute\": \"rule\",\"count\": 2,\"type\": \"string\",\"values\": [\"not \\\"id\\\": \\\"1234\\\", [\\\"==\\\", \\\"$id\\\", 1234]\",\"not \\\"properties\\\": {\\\"id\\\": 1234}, [\\\"==\\\", \\\"$id\\\", 1234]\"]}]},{\"layer\": \"notlayer938200568\",\"count\": 7,\"geometry\": \"Point\",\"attributeCount\": 1,\"attributes\": [{\"attribute\": \"rule\",\"count\": 1,\"type\": \"string\",\"values\": [\"not \\\"properties\\\": {}, [\\\"has\\\", \\\"foo\\\"]\"]}]}]}}",
 "maxzoom": "0",
 "minzoom": "0",
 "name": "tests/feature-filter/out/-z0_-Jtests%feature-filter%filter.json.check.mbtiles",
@@ -11,6 +11,12 @@
 "version": "2"
 }, "features": [
 { "type": "FeatureCollection", "properties": { "zoom": 0, "x": 0, "y": 0 }, "features": [
+{ "type": "FeatureCollection", "properties": { "layer": "layer1359089124", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "rule": "type: 2, [\"in\", \"$type\", \"LineString\", \"Polygon\"]" }, "geometry": { "type": "LineString", "coordinates": [ [ 0.000000, 0.000000 ], [ 0.966797, 1.054628 ] ] } }
+,
+{ "type": "Feature", "properties": { "rule": "type: 3, [\"in\", \"$type\", \"LineString\", \"Polygon\"]" }, "geometry": { "type": "Polygon", "coordinates": [ [ [ 0.966797, 1.054628 ], [ 0.966797, 0.000000 ], [ 0.000000, 0.000000 ], [ 0.966797, 1.054628 ] ] ] } }
+] }
+,
 { "type": "FeatureCollection", "properties": { "layer": "layer1392333553", "version": 2, "extent": 4096 }, "features": [
 { "type": "Feature", "properties": { "foo": "0", "rule": "\"properties\": {\"foo\": \"0\"}, [\"<=\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
 ,
@@ -31,6 +37,14 @@
 { "type": "Feature", "properties": { "rule": "\"properties\": {}, [\"!=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
 ] }
 ,
+{ "type": "FeatureCollection", "properties": { "layer": "layer1549998271", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "rule": "type: 1, [\"!=\", \"$type\", \"LineString\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "layer1675768827", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "rule": "type: 2, [\"==\", \"$type\", \"LineString\"]" }, "geometry": { "type": "LineString", "coordinates": [ [ 0.000000, 0.000000 ], [ 0.966797, 1.054628 ] ] } }
+] }
+,
 { "type": "FeatureCollection", "properties": { "layer": "layer1780490201", "version": 2, "extent": 4096 }, "features": [
 { "type": "Feature", "properties": { "foo": 0, "rule": "\"properties\": {\"foo\": 0}, [\"!=\", \"foo\", null]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
 ,
@@ -61,6 +75,10 @@
 { "type": "Feature", "properties": { "foo": 1, "rule": "\"properties\": {\"foo\": 1}, [\"none\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
 ] }
 ,
+{ "type": "FeatureCollection", "properties": { "layer": "layer2275670193", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "rule": "type: 1, [\"!in\", \"$type\", \"LineString\", \"Polygon\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
 { "type": "FeatureCollection", "properties": { "layer": "layer2333216076", "version": 2, "extent": 4096 }, "features": [
 { "type": "Feature", "properties": { "foo": 1, "rule": "\"properties\": {\"foo\": 1}, [\"all\", [\"==\", \"foo\", 1]]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
 ] }
@@ -101,6 +119,14 @@
 { "type": "Feature", "properties": { "rule": "\"properties\": {\"foo\": null}, [\"!in\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
 ] }
 ,
+{ "type": "FeatureCollection", "properties": { "layer": "layer3115744778", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "rule": "type: 2, [\"in\", \"$type\", \"Polygon\", \"LineString\", \"Point\"]" }, "geometry": { "type": "LineString", "coordinates": [ [ 0.000000, 0.000000 ], [ 0.966797, 1.054628 ] ] } }
+,
+{ "type": "Feature", "properties": { "rule": "type: 3, [\"in\", \"$type\", \"Polygon\", \"LineString\", \"Point\"]" }, "geometry": { "type": "Polygon", "coordinates": [ [ [ 0.966797, 1.054628 ], [ 0.966797, 0.000000 ], [ 0.000000, 0.000000 ], [ 0.966797, 1.054628 ] ] ] } }
+,
+{ "type": "Feature", "properties": { "rule": "type: 1, [\"in\", \"$type\", \"Polygon\", \"LineString\", \"Point\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
 { "type": "FeatureCollection", "properties": { "layer": "layer328238911", "version": 2, "extent": 4096 }, "features": [
 { "type": "Feature", "properties": { "foo": 0, "rule": "\"properties\": {\"foo\": 0}, [\"in\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
 ] }
@@ -187,6 +213,10 @@
 { "type": "Feature", "properties": { "rule": "\"properties\": {\"foo\": null}, [\"has\", \"foo\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
 ] }
 ,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer1359089124", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "rule": "not type: 1, [\"in\", \"$type\", \"LineString\", \"Polygon\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
 { "type": "FeatureCollection", "properties": { "layer": "notlayer1392333553", "version": 2, "extent": 4096 }, "features": [
 { "type": "Feature", "properties": { "foo": -1, "rule": "not \"properties\": {\"foo\": -1}, [\"<=\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
 ,
@@ -211,10 +241,18 @@
 { "type": "Feature", "properties": { "foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"in\", \"foo\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
 ] }
 ,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer1549998271", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "rule": "not type: 2, [\"!=\", \"$type\", \"LineString\"]" }, "geometry": { "type": "LineString", "coordinates": [ [ 0.000000, 0.000000 ], [ 0.966797, 1.054628 ] ] } }
+] }
+,
 { "type": "FeatureCollection", "properties": { "layer": "notlayer1619469362", "version": 2, "extent": 4096 }, "features": [
 { "type": "Feature", "properties": { "foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"all\", [\"==\", \"foo\", 0], [\"==\", \"foo\", 1]]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
 ] }
 ,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer1675768827", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "rule": "not type: 1, [\"==\", \"$type\", \"LineString\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
 { "type": "FeatureCollection", "properties": { "layer": "notlayer1780490201", "version": 2, "extent": 4096 }, "features": [
 { "type": "Feature", "properties": { "rule": "not \"properties\": {\"foo\": null}, [\"!=\", \"foo\", null]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
 ] }
@@ -261,6 +299,12 @@
 { "type": "Feature", "properties": { "rule": "not \"properties\": {}, [\"==\", \"foo\", null]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
 ] }
 ,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer2275670193", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "rule": "not type: 2, [\"!in\", \"$type\", \"LineString\", \"Polygon\"]" }, "geometry": { "type": "LineString", "coordinates": [ [ 0.000000, 0.000000 ], [ 0.966797, 1.054628 ] ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not type: 3, [\"!in\", \"$type\", \"LineString\", \"Polygon\"]" }, "geometry": { "type": "Polygon", "coordinates": [ [ [ 0.966797, 1.054628 ], [ 0.966797, 0.000000 ], [ 0.000000, 0.000000 ], [ 0.966797, 1.054628 ] ] ] } }
+] }
+,
 { "type": "FeatureCollection", "properties": { "layer": "notlayer2333214707", "version": 2, "extent": 4096 }, "features": [
 { "type": "Feature", "properties": { "foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"all\", [\"==\", \"foo\", 0]]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
 ] }
diff --git a/tests/make-filter-test b/tests/make-filter-test
index 61689ce2..b750908d 100755
--- a/tests/make-filter-test
+++ b/tests/make-filter-test
@@ -87,7 +87,45 @@ while (<IN>) {
 					print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"not$hash\" }, $prop, $qprop, \"geometry\": { \"type\": \"Point\", \"coordinates\": [ 0, 0 ] } }\n";
 					print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"$hash\" }, $prop, $qprop, \"geometry\": { \"type\": \"Point\", \"coordinates\": [ -100, 0 ] } }\n";
 				}
+			} elsif ($prop =~ /type: (.)/) {
+				my $type = $1;
 
+				my $qprop = "$prop, $filter";
+				$qprop =~ s/"/\\"/g;
+
+				if ($matched eq "true") {
+					$qprop = "\"properties\": { \"rule\": \"$qprop\" }";
+				} else {
+					$qprop = "\"properties\": { \"rule\": \"not $qprop\" }";
+				}
+
+				if ($type == 1) {
+					if ($matched eq "true") {
+						print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"$hash\" }, $qprop, \"geometry\": { \"type\": \"Point\", \"coordinates\": [ 0, 0 ] } }\n";
+						print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"not$hash\" }, $qprop, \"geometry\": { \"type\": \"Point\", \"coordinates\": [ -100, 0 ] } }\n";
+					} else {
+						print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"not$hash\" }, $qprop, \"geometry\": { \"type\": \"Point\", \"coordinates\": [ 0, 0 ] } }\n";
+						print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"$hash\" }, $qprop, \"geometry\": { \"type\": \"Point\", \"coordinates\": [ -100, 0 ] } }\n";
+					}
+				} elsif ($type == 2) {
+					if ($matched eq "true") {
+						print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"$hash\" }, $qprop, \"geometry\": { \"type\": \"LineString\", \"coordinates\": [ [ 0, 0 ], [ 1, 1 ] ] } }\n";
+						print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"not$hash\" }, $qprop, \"geometry\": { \"type\": \"LineString\", \"coordinates\": [ [ -100, 0 ], [ -101, 1 ] ] } }\n";
+					} else {
+						print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"not$hash\" }, $qprop, \"geometry\": { \"type\": \"LineString\", \"coordinates\": [ [ 0, 0 ], [ 1, 1 ] ] } }\n";
+						print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"$hash\" }, $qprop, \"geometry\": { \"type\": \"LineString\", \"coordinates\": [ [ -100, 0 ], [ -101, 1 ] ] } }\n";
+					}
+				} else {
+					if ($matched eq "true") {
+						print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"$hash\" }, $qprop, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 0, 0 ], [ 1, 1 ], [ 1, 0 ], [ 0, 0 ] ] ] } }\n";
+						print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"not$hash\" }, $qprop, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -100, 0 ], [ -101, 1 ], [ -101, 0 ], [-100, 0 ] ] ] } }\n";
+					} else {
+						print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"not$hash\" }, $qprop, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 0, 0 ], [ 1, 1 ], [ 1, 0 ], [ 0, 0 ] ] ] } }\n";
+						print GEOJSON "{ \"type\": \"Feature\", \"tippecanoe\": { \"layer\": \"$hash\" }, $qprop, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -100, 0 ], [ -101, 1 ], [ -101, 0 ], [-100, 0 ] ] ] } }\n";
+					}
+				}
+			} else {
+				print "$prop\n";
 			}
 		}
 	}

From bdd95af8b253454d580aea09a33bf1e9af04d3f6 Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Tue, 5 Sep 2017 13:29:57 -0700
Subject: [PATCH 16/17] Be careful not to generate empty layers in tile-join.

Add a test of filtering during tile-join.
Bump version number.
---
 CHANGELOG.md                           |   4 +
 Makefile                               |  10 +-
 README.md                              |  12 +-
 man/tippecanoe.1                       |  16 +-
 tests/feature-filter/out/filtered.json | 520 +++++++++++++++++++++++++
 tile-join.cpp                          |   5 +-
 version.hpp                            |   2 +-
 7 files changed, 551 insertions(+), 18 deletions(-)
 create mode 100644 tests/feature-filter/out/filtered.json

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4988d9c1..bf728490 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.24.0
+
+* Add feature filters using the Mapbox GL Style Specification filter syntax
+
 ## 1.23.0
 
 * Add input support for Geobuf file format
diff --git a/Makefile b/Makefile
index aec389e0..b265fa59 100644
--- a/Makefile
+++ b/Makefile
@@ -81,7 +81,7 @@ indent:
 TESTS = $(wildcard tests/*/out/*.json)
 SPACE = $(NULL) $(NULL)
 
-test: tippecanoe tippecanoe-decode $(addsuffix .check,$(TESTS)) raw-tiles-test parallel-test pbf-test join-test enumerate-test decode-test unit
+test: tippecanoe tippecanoe-decode $(addsuffix .check,$(TESTS)) raw-tiles-test parallel-test pbf-test join-test enumerate-test decode-test join-filter-test unit
 	./unit
 
 # Work around Makefile and filename punctuation limits: _ for space, @ for :, % for /
@@ -212,6 +212,14 @@ join-test:
 	rm tests/join-population/tabblock_06001420.mbtiles tests/join-population/joined.mbtiles tests/join-population/joined-i.mbtiles tests/join-population/joined.mbtiles.json.check tests/join-population/joined-i.mbtiles.json.check tests/join-population/macarthur.mbtiles tests/join-population/merged.mbtiles tests/join-population/merged.mbtiles.json.check  tests/join-population/merged-folder.mbtiles tests/join-population/macarthur2.mbtiles tests/join-population/windows.mbtiles tests/join-population/windows-merged.mbtiles tests/join-population/windows-merged2.mbtiles tests/join-population/windows.mbtiles.json.check tests/join-population/just-macarthur.mbtiles tests/join-population/no-macarthur.mbtiles tests/join-population/just-macarthur.mbtiles.json.check tests/join-population/no-macarthur.mbtiles.json.check tests/join-population/merged-folder.mbtiles.json.check tests/join-population/windows-merged.mbtiles.json.check tests/join-population/windows-merged2.mbtiles.json.check tests/join-population/macarthur-and-macarthur2-merged.mbtiles tests/join-population/macarthur-and-macarthur2-merged2.mbtiles tests/join-population/macarthur-and-macarthur2-merged.mbtiles.json.check tests/join-population/macarthur-and-macarthur2-merged2.mbtiles.json.check
 	rm -rf tests/join-population/raw-merged-folder tests/join-population/tabblock_06001420-folder tests/join-population/macarthur-folder tests/join-population/macarthur2-folder tests/join-population/merged-mbtiles-to-folder tests/join-population/merged-folders-to-folder tests/join-population/windows-merged-folder tests/join-population/macarthur-and-macarthur2-folder
 
+join-filter-test:
+	# Comes out different from the direct tippecanoe run because null attributes are lost
+	./tippecanoe -z0 -f -o tests/feature-filter/out/all.mbtiles tests/feature-filter/in.json
+	./tile-join -J tests/feature-filter/filter -f -o tests/feature-filter/out/filtered.mbtiles tests/feature-filter/out/all.mbtiles
+	./tippecanoe-decode tests/feature-filter/out/filtered.mbtiles > tests/feature-filter/out/filtered.json.check
+	cmp tests/feature-filter/out/filtered.json.check tests/feature-filter/out/filtered.json
+	rm -f tests/feature-filter/out/filtered.json.check tests/feature-filter/out/filtered.mbtiles tests/feature-filter/out/all.mbtiles
+
 # Use this target to regenerate the standards that the tests are compared against
 # after making a change that legitimately changes their output
 
diff --git a/README.md b/README.md
index 7516b591..b8b52aca 100644
--- a/README.md
+++ b/README.md
@@ -163,6 +163,12 @@ resolution is obtained than by using a smaller _maxzoom_ or _detail_.
  * `-j` *filter* or `--feature-filter`=*filter*: Check features against a per-layer filter (as defined in the [Mapbox GL Style Specification](https://www.mapbox.com/mapbox-gl-js/style-spec/#types-filter)) and only include those that match. Any features in layers that have no filter specified will be passed through. Filters for the layer `"*"` apply to all layers.
  * `-J` *filter-file* or `--feature-filter-file`=*filter-file*: Like `-j`, but read the filter from a file.
 
+Example: to find the Natural Earth countries with low `scalerank` but high `LABELRANK`:
+
+```
+tile-join -o filtered.mbtiles -j '{ "ne_10m_admin_0_countries": [ "all", [ "<", "scalerank", 3 ], [ ">", "LABELRANK", 5 ] ] }' ne_10m_admin_0_countries.mbtiles
+```
+
 ### Dropping a fixed fraction of features by zoom level
 
  * `-r` _rate_ or `--drop-rate=`_rate_: Rate at which dots are dropped at zoom levels below basezoom (default 2.5).
@@ -488,12 +494,6 @@ The options are:
  * `-j` *filter* or `--feature-filter`=*filter*: Check features against a per-layer filter (as defined in the [Mapbox GL Style Specification](https://www.mapbox.com/mapbox-gl-js/style-spec/#types-filter)) and only include those that match. Any features in layers that have no filter specified will be passed through. Filters for the layer `"*"` apply to all layers.
  * `-J` *filter-file* or `--feature-filter-file`=*filter-file*: Like `-j`, but read the filter from a file.
 
-Example: to find the Natural Earth countries with low `scalerank` but high `LABELRANK`:
-
-```
-tile-join -o filtered.mbtiles -j '{ "ne_10m_admin_0_countries": [ "all", [ "<", "scalerank", 3 ], [ ">", "LABELRANK", 5 ] ] }' ne_10m_admin_0_countries.mbtiles
-```
-
 ### Setting or disabling tile size limits
 
  * `-pk` or `--no-tile-size-limit`: Don't skip tiles larger than 500K.
diff --git a/man/tippecanoe.1 b/man/tippecanoe.1
index d2706bcc..75dc84bc 100644
--- a/man/tippecanoe.1
+++ b/man/tippecanoe.1
@@ -183,6 +183,14 @@ If the type is \fB\fCint\fR and the original attribute was floating\-point, it i
 .IP \(bu 2
 \fB\fC\-J\fR \fIfilter\-file\fP or \fB\fC\-\-feature\-filter\-file\fR=\fIfilter\-file\fP: Like \fB\fC\-j\fR, but read the filter from a file.
 .RE
+.PP
+Example: to find the Natural Earth countries with low \fB\fCscalerank\fR but high \fB\fCLABELRANK\fR:
+.PP
+.RS
+.nf
+tile\-join \-o filtered.mbtiles \-j '{ "ne_10m_admin_0_countries": [ "all", [ "<", "scalerank", 3 ], [ ">", "LABELRANK", 5 ] ] }' ne_10m_admin_0_countries.mbtiles
+.fi
+.RE
 .SS Dropping a fixed fraction of features by zoom level
 .RS
 .IP \(bu 2
@@ -577,14 +585,6 @@ The options are:
 .IP \(bu 2
 \fB\fC\-J\fR \fIfilter\-file\fP or \fB\fC\-\-feature\-filter\-file\fR=\fIfilter\-file\fP: Like \fB\fC\-j\fR, but read the filter from a file.
 .RE
-.PP
-Example: to find the Natural Earth countries with low \fB\fCscalerank\fR but high \fB\fCLABELRANK\fR:
-.PP
-.RS
-.nf
-tile\-join \-o filtered.mbtiles \-j '{ "ne_10m_admin_0_countries": [ "all", [ "<", "scalerank", 3 ], [ ">", "LABELRANK", 5 ] ] }' ne_10m_admin_0_countries.mbtiles
-.fi
-.RE
 .SS Setting or disabling tile size limits
 .RS
 .IP \(bu 2
diff --git a/tests/feature-filter/out/filtered.json b/tests/feature-filter/out/filtered.json
new file mode 100644
index 00000000..72e5cfe3
--- /dev/null
+++ b/tests/feature-filter/out/filtered.json
@@ -0,0 +1,520 @@
+{ "type": "FeatureCollection", "properties": {
+"bounds": "-180.000000,-85.051129,180.000000,85.051129",
+"center": "0.000000,0.000000,0",
+"description": "tests/feature-filter/out/all.mbtiles",
+"format": "pbf",
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+{ "type": "Feature", "properties": { "foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\"<\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
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+{ "type": "Feature", "properties": { "foo": true, "rule": "not \"properties\": {\"foo\": true}, [\"<\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
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+{ "type": "Feature", "properties": { "foo": false, "rule": "not \"properties\": {\"foo\": false}, [\"<\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
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+{ "type": "Feature", "properties": { "rule": "not \"properties\": {\"foo\": null}, [\"<\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
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+{ "type": "FeatureCollection", "properties": { "layer": "notlayer2624681884", "version": 2, "extent": 4096 }, "features": [
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+,
+{ "type": "Feature", "properties": { "foo": "1", "rule": "not \"properties\": {\"foo\": \"1\"}, [\"<\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
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+,
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+,
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+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer2681700979", "version": 2, "extent": 4096 }, "features": [
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+{ "type": "Feature", "properties": { "foo": true, "rule": "not \"properties\": {\"foo\": true}, [\"in\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": false, "rule": "not \"properties\": {\"foo\": false}, [\"in\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
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+{ "type": "Feature", "properties": { "rule": "not \"properties\": {\"foo\": null}, [\"in\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {}, [\"in\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer2850085303", "version": 2, "extent": 4096 }, "features": [
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+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer2925029377", "version": 2, "extent": 4096 }, "features": [
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+,
+{ "type": "Feature", "properties": { "foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"!in\", \"foo\", 0, 1]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer3048837612", "version": 2, "extent": 4096 }, "features": [
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+] }
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+{ "type": "FeatureCollection", "properties": { "layer": "notlayer328238911", "version": 2, "extent": 4096 }, "features": [
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+{ "type": "Feature", "properties": { "foo": true, "rule": "not \"properties\": {\"foo\": true}, [\"in\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
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+{ "type": "Feature", "properties": { "foo": false, "rule": "not \"properties\": {\"foo\": false}, [\"in\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
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+{ "type": "Feature", "properties": { "rule": "not \"properties\": {\"foo\": null}, [\"in\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer3425959847", "version": 2, "extent": 4096 }, "features": [
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+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer3444677016", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\"!in\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer3603115546", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"any\", [\"==\", \"foo\", 0]]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer3835447578", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": -1, "rule": "not \"properties\": {\"foo\": -1}, [\">\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": 0, "rule": "not \"properties\": {\"foo\": 0}, [\">\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\">\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\">\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "-1", "rule": "not \"properties\": {\"foo\": \"-1\"}, [\">\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": true, "rule": "not \"properties\": {\"foo\": true}, [\">\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": false, "rule": "not \"properties\": {\"foo\": false}, [\">\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {\"foo\": null}, [\">\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer4018549566", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": 0, "rule": "not \"properties\": {\"foo\": 0}, [\">\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": -1, "rule": "not \"properties\": {\"foo\": -1}, [\">\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "1", "rule": "not \"properties\": {\"foo\": \"1\"}, [\">\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\">\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "-1", "rule": "not \"properties\": {\"foo\": \"-1\"}, [\">\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": true, "rule": "not \"properties\": {\"foo\": true}, [\">\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": false, "rule": "not \"properties\": {\"foo\": false}, [\">\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {\"foo\": null}, [\">\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {}, [\">\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer4079511021", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"<=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "1", "rule": "not \"properties\": {\"foo\": \"1\"}, [\"<=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\"<=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "-1", "rule": "not \"properties\": {\"foo\": \"-1\"}, [\"<=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": true, "rule": "not \"properties\": {\"foo\": true}, [\"<=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": false, "rule": "not \"properties\": {\"foo\": false}, [\"<=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {\"foo\": null}, [\"<=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {}, [\"<=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer4098096220", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\"any\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer4113007703", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": -1, "rule": "not \"properties\": {\"foo\": -1}, [\">=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "1", "rule": "not \"properties\": {\"foo\": \"1\"}, [\">=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\">=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "-1", "rule": "not \"properties\": {\"foo\": \"-1\"}, [\">=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": true, "rule": "not \"properties\": {\"foo\": true}, [\">=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": false, "rule": "not \"properties\": {\"foo\": false}, [\">=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {\"foo\": null}, [\">=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {}, [\">=\", \"foo\", 0]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer442294443", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": "bar", "rule": "not \"properties\": {\"foo\": \"bar\"}, [\"!=\", \"foo\", \"bar\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer464719784", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": 3, "rule": "not \"properties\": {\"foo\": 3}, [\"in\", \"foo\", 0, 1]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer4650955", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "foo": -1, "rule": "not \"properties\": {\"foo\": -1}, [\">=\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": 0, "rule": "not \"properties\": {\"foo\": 0}, [\">=\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": 1, "rule": "not \"properties\": {\"foo\": 1}, [\">=\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "-1", "rule": "not \"properties\": {\"foo\": \"-1\"}, [\">=\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": true, "rule": "not \"properties\": {\"foo\": true}, [\">=\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": false, "rule": "not \"properties\": {\"foo\": false}, [\">=\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {\"foo\": null}, [\">=\", \"foo\", \"0\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer584721662", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "rule": "\"properties\": {\"foo\": null}, [\"in\", \"foo\", null]" }, "geometry": { "type": "Point", "coordinates": [ -100.019531, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": 0, "rule": "not \"properties\": {\"foo\": 0}, [\"in\", \"foo\", null]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": "0", "rule": "not \"properties\": {\"foo\": \"0\"}, [\"in\", \"foo\", null]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": true, "rule": "not \"properties\": {\"foo\": true}, [\"in\", \"foo\", null]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "foo": false, "rule": "not \"properties\": {\"foo\": false}, [\"in\", \"foo\", null]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer827905613", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "rule": "not \"id\": \"1234\", [\"==\", \"$id\", 1234]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "id": 1234, "rule": "not \"properties\": {\"id\": 1234}, [\"==\", \"$id\", 1234]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+,
+{ "type": "FeatureCollection", "properties": { "layer": "notlayer938200568", "version": 2, "extent": 4096 }, "features": [
+{ "type": "Feature", "properties": { "rule": "\"properties\": {\"foo\": null}, [\"has\", \"foo\"]" }, "geometry": { "type": "Point", "coordinates": [ -100.019531, 0.000000 ] } }
+,
+{ "type": "Feature", "properties": { "rule": "not \"properties\": {}, [\"has\", \"foo\"]" }, "geometry": { "type": "Point", "coordinates": [ 0.000000, 0.000000 ] } }
+] }
+] }
+] }
diff --git a/tile-join.cpp b/tile-join.cpp
index b11e8ed0..c0257102 100644
--- a/tile-join.cpp
+++ b/tile-join.cpp
@@ -618,15 +618,16 @@ void *join_worker(void *v) {
 		ai->second.clear();
 
 		bool anything = false;
+		mvt_tile outtile;
 		for (size_t i = 0; i < tile.layers.size(); i++) {
 			if (tile.layers[i].features.size() > 0) {
+				outtile.layers.push_back(tile.layers[i]);
 				anything = true;
-				break;
 			}
 		}
 
 		if (anything) {
-			std::string pbf = tile.encode();
+			std::string pbf = outtile.encode();
 			std::string compressed;
 
 			if (!pC) {
diff --git a/version.hpp b/version.hpp
index 2345ed1b..32ce84e4 100644
--- a/version.hpp
+++ b/version.hpp
@@ -1,6 +1,6 @@
 #ifndef VERSION_HPP
 #define VERSION_HPP
 
-#define VERSION "tippecanoe v1.23.0\n"
+#define VERSION "tippecanoe v1.24.0\n"
 
 #endif

From c9e42752170c7c7da47b480d5e9488362d79b781 Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Tue, 5 Sep 2017 14:02:43 -0700
Subject: [PATCH 17/17] Do fewer tests in the address sanitizer build

---
 .travis.yml                                                | 7 +++++--
 Makefile                                                   | 5 ++++-
 .../out/{filtered.json => filtered.json.standard}          | 0
 3 files changed, 9 insertions(+), 3 deletions(-)
 rename tests/feature-filter/out/{filtered.json => filtered.json.standard} (100%)

diff --git a/.travis.yml b/.travis.yml
index 89ab3d92..879837d7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,7 +17,7 @@ matrix:
     # debug+leak+address-sanitizer build
     - os: linux
       compiler: clang
-      env: CLANG_VERSION='3.8.0' BUILDTYPE=Debug ASAN_OPTIONS=detect_leaks=1 CC="clang-3.8" CXX="clang++-3.8" CXXFLAGS="-fsanitize=address" CFLAGS="-fsanitize=address" LDFLAGS="-fsanitize=address"
+      env: CLANG_VERSION='3.8.0' BUILDTYPE=Debug ASAN_OPTIONS=detect_leaks=1 CC="clang-3.8" CXX="clang++-3.8" CXXFLAGS="-fsanitize=address" CFLAGS="-fsanitize=address" LDFLAGS="-fsanitize=address" FEWER=true
       addons:
         apt:
           sources: ['ubuntu-toolchain-r-test' ]
@@ -71,7 +71,10 @@ install:
 
 script:
  - npm install geobuf
- - BUILDTYPE=${BUILDTYPE} make test geobuf-test
+ - if [ -n "${FEWER}" ]; then
+       BUILDTYPE=${BUILDTYPE} make fewer-tests; else
+       BUILDTYPE=${BUILDTYPE} make test geobuf-test;
+   fi
  - if [ -n "${COVERAGE}" ]; then
        /usr/bin/llvm-cov-3.5 -lp *.o;
        pip install --user cpp-coveralls;
diff --git a/Makefile b/Makefile
index b265fa59..b4b2773d 100644
--- a/Makefile
+++ b/Makefile
@@ -93,6 +93,9 @@ test: tippecanoe tippecanoe-decode $(addsuffix .check,$(TESTS)) raw-tiles-test p
 
 geobuf-test: geojson2nd $(addsuffix .checkbuf,$(TESTS))
 
+# For quicker address sanitizer build, hope that regular JSON parsing is tested enough by parallel and join tests
+fewer-tests: tippecanoe tippecanoe-decode geobuf-test raw-tiles-test parallel-test pbf-test join-test enumerate-test decode-test join-filter-test unit
+
 # XXX Use proper makefile rules instead of a for loop
 %.json.checkbuf:
 	for i in $(wildcard $(subst $(SPACE),/,$(wordlist 1,2,$(subst /, ,$@)))/*.json); do ./geojson2nd -w $$i | ./node_modules/geobuf/bin/json2geobuf > $$i.geobuf; done
@@ -217,7 +220,7 @@ join-filter-test:
 	./tippecanoe -z0 -f -o tests/feature-filter/out/all.mbtiles tests/feature-filter/in.json
 	./tile-join -J tests/feature-filter/filter -f -o tests/feature-filter/out/filtered.mbtiles tests/feature-filter/out/all.mbtiles
 	./tippecanoe-decode tests/feature-filter/out/filtered.mbtiles > tests/feature-filter/out/filtered.json.check
-	cmp tests/feature-filter/out/filtered.json.check tests/feature-filter/out/filtered.json
+	cmp tests/feature-filter/out/filtered.json.check tests/feature-filter/out/filtered.json.standard
 	rm -f tests/feature-filter/out/filtered.json.check tests/feature-filter/out/filtered.mbtiles tests/feature-filter/out/all.mbtiles
 
 # Use this target to regenerate the standards that the tests are compared against
diff --git a/tests/feature-filter/out/filtered.json b/tests/feature-filter/out/filtered.json.standard
similarity index 100%
rename from tests/feature-filter/out/filtered.json
rename to tests/feature-filter/out/filtered.json.standard