common/Formatter: use emplace_back()

This eliminates temporary `std::string` instances.

Signed-off-by: Max Kellermann <max.kellermann@ionos.com>

diff --git a/src/common/Formatter.cc b/src/common/Formatter.cc
index ec358c2f244c68e3d8c45fe9da01edfb8277bebb..3a201ce654f7e2858eddd068d03c1ef70578a7f1 100644 (file)
--- a/src/common/Formatter.cc
+++ b/src/common/Formatter.cc
@@ -83,7 +83,7 @@ FormatterAttrs::FormatterAttrs(const char *attr, ...)
     if (!val)
       break;
 
-    attrs.push_back(make_pair(std::string(s), std::string(val)));
+    attrs.emplace_back(s, val);
     s = va_arg(ap, char *);
   } while (s);
   va_end(ap);