1 files changed, 17 insertions, 0 deletions
diff --git a/src/mbgl/tile/geometry_tile.cpp b/src/mbgl/tile/geometry_tile.cpp
new file mode 100644
index 0000000000..fa41481d4d
--- /dev/null
+++ b/src/mbgl/tile/geometry_tile.cpp
@@ -0,0 +1,17 @@
+#include <mbgl/tile/geometry_tile.hpp>
+#include <mbgl/style/filter_expression.hpp>
+#include <mbgl/style/filter_expression_private.hpp>
+
+namespace mbgl {
+
+optional<Value> GeometryTileFeatureExtractor::getValue(const std::string& key) const {
+    if (key == "$type") {
+        return Value(uint64_t(feature.getType()));
+    }
+
+    return feature.getValue(key);
+}
+
+template bool evaluate(const FilterExpression&, const GeometryTileFeatureExtractor&);
+
+} // namespace mbgl