1 files changed, 20 insertions, 0 deletions
diff --git a/include/mbgl/style/expression/find_zoom_curve.hpp b/include/mbgl/style/expression/find_zoom_curve.hpp
new file mode 100644
index 0000000000..6301938033
--- /dev/null
+++ b/include/mbgl/style/expression/find_zoom_curve.hpp
@@ -0,0 +1,20 @@
+#pragma once
+
+#include <mbgl/style/expression/parsing_context.hpp>
+#include <mbgl/style/expression/interpolate.hpp>
+#include <mbgl/style/expression/step.hpp>
+
+#include <mbgl/util/variant.hpp>
+#include <mbgl/util/optional.hpp>
+
+namespace mbgl {
+namespace style {
+namespace expression {
+
+optional<variant<const InterpolateBase*, const Step*, ParsingError>> findZoomCurve(const expression::Expression* e);
+
+variant<const InterpolateBase*, const Step*> findZoomCurveChecked(const expression::Expression* e);
+
+} // namespace expression
+} // namespace style
+} // namespace mbgl