3 files changed, 7 insertions, 1 deletions
diff --git a/include/mbgl/style/function/camera_function.hpp b/include/mbgl/style/function/camera_function.hpp
index 015abd3e62..1da5d2c601 100644
--- a/include/mbgl/style/function/camera_function.hpp
+++ b/include/mbgl/style/function/camera_function.hpp
@@ -76,7 +76,9 @@ public:
     }
 
     bool useIntegerZoom = false;
-    
+
+    const expression::Expression& getExpression() const { return *expression; }
+
     // retained for compatibility with pre-expression function API
     Stops stops;
 
diff --git a/include/mbgl/style/function/composite_function.hpp b/include/mbgl/style/function/composite_function.hpp
index 24578f599c..f391b101ae 100644
--- a/include/mbgl/style/function/composite_function.hpp
+++ b/include/mbgl/style/function/composite_function.hpp
@@ -111,6 +111,8 @@ public:
         return *lhs.expression == *rhs.expression;
     }
 
+    const expression::Expression& getExpression() const { return *expression; }
+
     std::string property;
     Stops stops;
     optional<T> defaultValue;
diff --git a/include/mbgl/style/function/source_function.hpp b/include/mbgl/style/function/source_function.hpp
index bd7b109fd8..d3caa90ee5 100644
--- a/include/mbgl/style/function/source_function.hpp
+++ b/include/mbgl/style/function/source_function.hpp
@@ -68,6 +68,8 @@ public:
 
     bool useIntegerZoom = false;
 
+    const expression::Expression& getExpression() const { return *expression; }
+
     // retained for compatibility with pre-expression function API
     std::string property;
     Stops stops;