[build] change style code generator to sort properties alphabetically

JSON keys in our style specification don't have a defined order. This change sorts them alphabetically so that we can rely on the order remaining them same across code generation runs.

1 files changed, 6 insertions, 6 deletions

diff --git a/src/mbgl/style/layers/background_layer_properties.hpp b/src/mbgl/style/layers/background_layer_properties.hpp
index 3765e2e569..371e8639f1 100644
--- a/src/mbgl/style/layers/background_layer_properties.hpp
+++ b/src/mbgl/style/layers/background_layer_properties.hpp
@@ -18,18 +18,18 @@ struct BackgroundColor : PaintProperty<Color> {
     static Color defaultValue() { return Color::black(); }
 };
 
-struct BackgroundPattern : CrossFadedPaintProperty<std::string> {
-    static std::string defaultValue() { return ""; }
-};
-
 struct BackgroundOpacity : PaintProperty<float> {
     static float defaultValue() { return 1; }
 };
 
+struct BackgroundPattern : CrossFadedPaintProperty<std::string> {
+    static std::string defaultValue() { return ""; }
+};
+
 class BackgroundPaintProperties : public Properties<
     BackgroundColor,
-    BackgroundPattern,
-    BackgroundOpacity
+    BackgroundOpacity,
+    BackgroundPattern
 > {};
 
 class BackgroundLayerProperties final : public LayerProperties {