1 files changed, 24 insertions, 2 deletions
diff --git a/src/mbgl/util/interpolate.hpp b/src/mbgl/util/interpolate.hpp
index 952d7b9c10..55b1e2add4 100644
--- a/src/mbgl/util/interpolate.hpp
+++ b/src/mbgl/util/interpolate.hpp
@@ -4,6 +4,8 @@
 #include <array>
 #include <vector>
 
+#include <mbgl/style/types.hpp>
+
 namespace mbgl {
 namespace util {
 
@@ -22,10 +24,30 @@ inline std::array<T, 4> interpolate(const std::array<T, 4>& a, const std::array<
     }};
 }
 
-inline std::vector<float> interpolate(const std::vector<float> &a, const std::vector<float>, const double) {
-    return a;
+template <typename T>
+inline std::array<T, 2> interpolate(const std::array<T, 2>& a, const std::array<T, 2>& b, const double t) {
+    return {{
+        interpolate(a[0], b[0], t),
+        interpolate(a[1], b[1], t)
+    }};
 }
 
+// fake interpolations that just return the first value
+template<> inline bool interpolate(const bool a, const bool, const double) { return a; }
+template<> inline std::vector<float> interpolate(const std::vector<float> a, const std::vector<float>, const double) { return a; }
+template<> inline std::string interpolate(const std::string a, const std::string, const double) { return a; }
+template<> inline TranslateAnchorType interpolate(const TranslateAnchorType a, const TranslateAnchorType, const double) { return a; }
+template<> inline RotateAnchorType interpolate(const RotateAnchorType a, const RotateAnchorType, const double) { return a; }
+template<> inline CapType interpolate(const CapType a, const CapType, const double) { return a; }
+template<> inline JoinType interpolate(const JoinType a, const JoinType, const double) { return a; }
+template<> inline PlacementType interpolate(const PlacementType a, const PlacementType, const double) { return a; }
+template<> inline TextAnchorType interpolate(const TextAnchorType a, const TextAnchorType, const double) { return a; }
+template<> inline TextJustifyType interpolate(const TextJustifyType a, const TextJustifyType, const double) { return a; }
+template<> inline TextTransformType interpolate(const TextTransformType a, const TextTransformType, const double) { return a; }
+template<> inline RotationAlignmentType interpolate(const RotationAlignmentType a, const RotationAlignmentType, const double) { return a; }
+
+
+
 }
 }