[ios, macos] Minimal darwin wrappers of 'format' expression

Add support for `MGL_FUNCTION('format', <text>, <options dictionary>)`

1 files changed, 5 insertions, 1 deletions

diff --git a/include/mbgl/style/expression/dsl.hpp b/include/mbgl/style/expression/dsl.hpp
index a4483a6fe6..bd94a765e7 100644
--- a/include/mbgl/style/expression/dsl.hpp
+++ b/include/mbgl/style/expression/dsl.hpp
@@ -38,7 +38,8 @@ std::unique_ptr<Expression> boolean(std::unique_ptr<Expression>);
 
 std::unique_ptr<Expression> toColor(std::unique_ptr<Expression>);
 std::unique_ptr<Expression> toString(std::unique_ptr<Expression>);
-
+std::unique_ptr<Expression> toFormatted(std::unique_ptr<Expression>);
+    
 std::unique_ptr<Expression> get(const char* value);
 std::unique_ptr<Expression> get(std::unique_ptr<Expression>);
 
@@ -78,6 +79,9 @@ std::unique_ptr<Expression> interpolate(Interpolator interpolator,
                                         double input3, std::unique_ptr<Expression> output3);
 
 std::unique_ptr<Expression> concat(std::vector<std::unique_ptr<Expression>> inputs);
+    
+std::unique_ptr<Expression> format(const char* value);
+std::unique_ptr<Expression> format(std::unique_ptr<Expression>);
 
 } // namespace dsl
 } // namespace expression