Fix result value from parseProperty when T = std::array<float, 2>

src/mbgl/style/style_parser.cpp

@@ -286,7 +286,7 @@ std::tuple<bool, std::array<float, 2>> StyleParser::parseProperty(JSVal value, c
 
         float first = value[rapidjson::SizeType(0)].GetDouble();
         float second = value[rapidjson::SizeType(1)].GetDouble();
-        return std::tuple<bool, std::array<float, 2>> { false, {{ first, second }} };
+        return std::tuple<bool, std::array<float, 2>> { true, {{ first, second }} };
     } else {
         Log::Warning(Event::ParseStyle, "value must be array of two numbers");
         return std::tuple<bool, std::array<float, 2>> { false, {{ 0.0f, 0.0f }} };
@@ -367,7 +367,7 @@ std::tuple<bool, std::vector<std::pair<float, T>>> StyleParser::parseStops(JSVal
 template <typename T>
 std::tuple<bool, Function<T>> StyleParser::parseFunction(JSVal value, const char *property_name) {
     if (!value.IsObject()) {
-        return std::tuple<bool, Function<T>> { true, ConstantFunction<T>(std::get<1>(parseProperty<T>(value, property_name))) };
+        return parseProperty<T>(value, property_name);
     }
 
     if (!value.HasMember("stops")) {

test/fixtures/style_parser/line-translate.info.json

@@ -0,0 +1,7 @@
+{
+    "default": {
+        "log": [
+            [1, "WARNING", "ParseStyle", "value must be array of two numbers"]
+        ]
+    }
+}

test/fixtures/style_parser/line-translate.style.json

@@ -0,0 +1,18 @@
+{
+  "version": 6,
+  "sources": {
+    "mapbox": {
+      "type": "vector",
+      "url": "mapbox://mapbox.mapbox-terrain-v1,mapbox.mapbox-streets-v5",
+      "maxzoom": 14
+    }
+  },
+  "layers": [{
+    "id": "line_translate_example",
+    "type": "line",
+    "source": "mapbox",
+    "paint": {
+      "line-translate": null
+    }
+  }]
+}