ostream_base::ostream_base& operator <<(const ::std::string& s) 参照ついてなかったよバグ

diff --git a/roast/include/roast/stream/base_stream.hpp b/roast/include/roast/stream/base_stream.hpp
index f754ad8..5043035 100644 (file)
--- a/roast/include/roast/stream/base_stream.hpp
+++ b/roast/include/roast/stream/base_stream.hpp
@@ -89,7 +89,7 @@ namespace roast
                                }
                        
                        ostream_base& operator <<(const char* str){ outstr(str); return *this; }
-                       ostream_base& operator <<(const ::std::string s){ outstr(s.c_str()); return *this; }
+                       ostream_base& operator <<(const ::std::string& s){ outstr(s.c_str()); return *this; }
                        ostream_base& operator <<(char n){ _outchar(n); return *this; }
                        ostream_base& operator <<(int n){ outint(n); return *this; }
                        ostream_base& operator <<(unsigned char n){ _outchar(n); return *this; }