1 files changed, 61 insertions, 0 deletions
diff --git a/src/mbgl/style/expression/formatted.cpp b/src/mbgl/style/expression/formatted.cpp
new file mode 100644
index 0000000000..6eb106dfec
--- /dev/null
+++ b/src/mbgl/style/expression/formatted.cpp
@@ -0,0 +1,61 @@
+#include <mbgl/style/expression/formatted.hpp>
+#include <mbgl/style/conversion_impl.hpp>
+#include <mbgl/style/expression/is_constant.hpp>
+#include <mbgl/style/expression/is_expression.hpp>
+#include <mbgl/style/expression/literal.hpp>
+#include <mbgl/style/expression/expression.hpp>
+#include <mbgl/style/expression/type.hpp>
+#include <mbgl/style/expression/compound_expression.hpp>
+#include <mbgl/style/expression/boolean_operator.hpp>
+
+namespace mbgl {
+namespace style {
+    
+namespace expression {
+
+bool Formatted::operator==(const Formatted& other) const {
+    if (other.sections.size() != sections.size()) {
+        return false;
+    }
+    for (std::size_t i = 0; i < sections.size(); i++) {
+        const auto& thisSection = sections.at(i);
+        const auto& otherSection = other.sections.at(i);
+        if (thisSection.text != otherSection.text ||
+            thisSection.fontScale != otherSection.fontScale ||
+            thisSection.fontStack != otherSection.fontStack) {
+            return false;
+        }
+    }
+    return true;
+}
+    
+    
+std::string Formatted::toString() const {
+    std::string result;
+    for (const auto& section : sections) {
+        result += section.text;
+    }
+    return result;
+}
+    
+} // namespace expression
+
+namespace conversion {
+    
+using namespace mbgl::style::expression;
+
+optional<Formatted> Converter<Formatted>::operator()(const Convertible& value, Error&) const {
+    using namespace mbgl::style::expression;
+
+    auto result = toString(value);
+    if (result) {
+        return Formatted(result->c_str());
+    } else {
+        return nullopt;
+    }
+}
+
+} // namespace conversion
+} // namespace style
+} // namespace mbgl
+