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-rw-r--r--include/mbgl/style/expression/is_constant.hpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/mbgl/style/expression/is_constant.hpp b/include/mbgl/style/expression/is_constant.hpp
index 2861407af0..a9c41e48b1 100644
--- a/include/mbgl/style/expression/is_constant.hpp
+++ b/include/mbgl/style/expression/is_constant.hpp
@@ -30,6 +30,8 @@ bool isGlobalPropertyConstant(const Expression& expression, const T& properties)
bool isFeatureConstant(const Expression& expression);
bool isZoomConstant(const Expression& e);
+// Returns true if expression does not depend on information provided by the runtime.
+bool isRuntimeConstant(const Expression& e);
} // namespace expression
} // namespace style