[core] Replace boost::lexical_cast with std::to_string

This removes the only boost dependency from public headers.

1 files changed, 8 insertions, 1 deletions

diff --git a/platform/default/image.cpp b/platform/default/image.cpp
index 2195a999c9..988d2f4a4e 100644
--- a/platform/default/image.cpp
+++ b/platform/default/image.cpp
@@ -4,10 +4,17 @@
 
 #include <png.h>
 
+template<size_t max, typename... Args>
+inline static std::string sprintf(const char *msg, Args... args) {
+    char res[max];
+    int len = snprintf(res, sizeof(res), msg, args...);
+    return std::string(res, len);
+}
+
 const static bool png_version_check __attribute__((unused)) = []() {
     const png_uint_32 version = png_access_version_number();
     if (version != PNG_LIBPNG_VER) {
-        throw std::runtime_error(mbgl::util::sprintf<96>(
+        throw std::runtime_error(sprintf<96>(
             "libpng version mismatch: headers report %d.%d.%d, but library reports %d.%d.%d",
             PNG_LIBPNG_VER / 10000, (PNG_LIBPNG_VER / 100) % 100, PNG_LIBPNG_VER % 100,
             version / 10000, (version / 100) % 100, version % 100));