1 files changed, 22 insertions, 0 deletions
diff --git a/src/mbgl/style/conversion/constant.cpp b/src/mbgl/style/conversion/constant.cpp
index ffdb17858d..0e4e29f689 100644
--- a/src/mbgl/style/conversion/constant.cpp
+++ b/src/mbgl/style/conversion/constant.cpp
@@ -127,6 +127,28 @@ template optional<std::array<float, 2>> Converter<std::array<float, 2>>::operato
 template optional<std::array<float, 3>> Converter<std::array<float, 3>>::operator()(const Convertible&, Error&) const;
 template optional<std::array<float, 4>> Converter<std::array<float, 4>>::operator()(const Convertible&, Error&) const;
 
+template <size_t N>
+optional<std::array<double, N>> Converter<std::array<double, N>>::operator()(const Convertible& value,
+                                                                             Error& error) const {
+    if (!isArray(value) || arrayLength(value) != N) {
+        error.message = "value must be an array of " + util::toString(N) + " numbers";
+        return nullopt;
+    }
+
+    std::array<double, N> result;
+    for (size_t i = 0; i < N; i++) {
+        optional<double> n = toDouble(arrayMember(value, i));
+        if (!n) {
+            error.message = "value must be an array of " + util::toString(N) + " numbers";
+            return nullopt;
+        }
+        result[i] = *n;
+    }
+    return result;
+}
+
+template optional<std::array<double, 3>> Converter<std::array<double, 3>>::operator()(const Convertible&, Error&) const;
+
 optional<std::vector<float>> Converter<std::vector<float>>::operator()(const Convertible& value, Error& error) const {
     if (!isArray(value)) {
         error.message = "value must be an array";