[core] Use the proper type for font stacks

1 files changed, 16 insertions, 0 deletions

diff --git a/src/mbgl/style/types.cpp b/src/mbgl/style/types.cpp
new file mode 100644
index 0000000000..27574afa93
--- /dev/null
+++ b/src/mbgl/style/types.cpp
@@ -0,0 +1,16 @@
+#include <mbgl/style/types.hpp>
+
+#include <boost/functional/hash.hpp>
+#include <boost/algorithm/string/join.hpp>
+
+namespace mbgl {
+
+std::string fontStackToString(const FontStack& fontStack) {
+    return boost::algorithm::join(fontStack, ",");
+}
+
+std::size_t FontStackHash::operator()(const FontStack& fontStack) const {
+    return boost::hash_range(fontStack.begin(), fontStack.end());
+}
+
+} // namespace mbgl