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-rw-r--r--include/mbgl/style/expression/equals.hpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/mbgl/style/expression/equals.hpp b/include/mbgl/style/expression/equals.hpp
index 3c0c024294..80550bd59d 100644
--- a/include/mbgl/style/expression/equals.hpp
+++ b/include/mbgl/style/expression/equals.hpp
@@ -19,6 +19,7 @@ public:
void eachChild(const std::function<void(const Expression&)>& visit) const override;
bool operator==(const Expression&) const override;
EvaluationResult evaluate(const EvaluationContext&) const override;
+ std::vector<optional<Value>> possibleOutputs() const override;
private:
std::unique_ptr<Expression> lhs;