Add format_arg::operator bool

2016-10-02 09:36:40 -07:00
parent 119a63ab72
commit 48fe97835b
1 changed files with 2 additions and 0 deletions
--- a/fmt/format.h
+++ b/fmt/format.h
@@ -1031,6 +1031,8 @@ struct Value {
 // allow storage in internal::MemoryBuffer.
 struct format_arg : internal::Value {
  Type type;
+
+  explicit operator bool() const noexcept { return type != NONE; }
 };

 namespace internal {