1 files changed, 52 insertions, 0 deletions
diff --git a/include/mbgl/util/token.hpp b/include/mbgl/util/token.hpp
new file mode 100644
index 0000000000..a794e0489c
--- /dev/null
+++ b/include/mbgl/util/token.hpp
@@ -0,0 +1,52 @@
+#ifndef MBGL_UTIL_TOKEN
+#define MBGL_UTIL_TOKEN
+
+#ifdef __linux__
+#include <boost/regex.hpp>
+namespace regex_impl = boost;
+#else
+#include <regex>
+namespace regex_impl = std;
+#endif
+
+#include <map>
+
+namespace mbgl {
+namespace util {
+
+namespace detail {
+const regex_impl::regex tokenRegex("\\{(\\w+)\\}");
+const regex_impl::sregex_token_iterator tokensEnd = regex_impl::sregex_token_iterator();
+}
+
+template <typename Lookup>
+std::string replaceTokens(const std::string &source, const Lookup &lookup) {
+    std::string result;
+    result.reserve(source.size());
+
+    bool token = false;
+    for (auto token_it = regex_impl::sregex_token_iterator(source.begin(), source.end(),
+                                                           detail::tokenRegex, {-1, 1});
+        token_it != detail::tokensEnd; ++token_it, token = !token) {
+        if (!token_it->matched) {
+            continue;
+        }
+
+        result += token ? lookup(token_it->str()) : token_it->str();
+    }
+
+    return result;
+}
+
+template <typename T>
+inline std::string replaceTokens(const std::string &source, const std::map<std::string, T> &properties) {
+    return replaceTokens(source, [&properties](const std::string &token) -> std::string {
+        const auto it_prop = properties.find(token);
+        return it_prop != properties.end() ? toString(it_prop->second) : "";
+    });
+}
+
+} // end namespace util
+} // end namespace mbgl
+
+#endif