Refactor: use conversion system to convert MGLStyleFunction to mbgl core types (#8026)

This leverages the work already happening in `mbgl::style::conversion` to convert style functions from style-spec definitions into `mbgl::style::{Camera,Source,Composite}Function`s.  In particular, this allows the conversions system to handle the differing typing requirements based on whether the output type of the style function is interpolatable or non-interpolatable.

1 files changed, 1 insertions, 1 deletions

diff --git a/include/mbgl/style/conversion/function.hpp b/include/mbgl/style/conversion/function.hpp
index 1f7a3fe778..a5979e6799 100644
--- a/include/mbgl/style/conversion/function.hpp
+++ b/include/mbgl/style/conversion/function.hpp
@@ -200,7 +200,7 @@ struct Converter<CameraFunction<T>> {
 
 template <class T, class V>
 Result<optional<T>> convertDefaultValue(const V& value) {
-    auto defaultValueValue = objectMember(value, "defaultValue");
+    auto defaultValueValue = objectMember(value, "default");
     if (!defaultValueValue) {
         return {};
     }