[Fix] include missing <type_traits> for formatter.h (open-mmlab#313)

lzhangzz · grimoire · commit edb77cee08be · 2022-04-15T23:14:08.000+08:00
* fix formatter

* relax GCC version requirement
diff --git a/csrc/core/utils/formatter.h b/csrc/core/utils/formatter.h
@@ -7,6 +7,8 @@
 
 #if FMT_VERSION >= 50000
 #include "spdlog/fmt/bundled/ranges.h"
+#else
+#include <type_traits>
 #endif
 
 namespace mmdeploy {
@@ -36,7 +38,7 @@ inline void format_arg(BasicFormatter<char> &f, const char *, const mmdeploy::Va
   f.writer() << mmdeploy::format_value(d);
 }
 
-template <typename T, std::enable_if_t<std::is_enum_v<std::decay_t<T> >, bool> = true>
+template <typename T, std::enable_if_t<std::is_enum<std::decay_t<T> >::value, bool> = true>
 void format_arg(BasicFormatter<char> &f, const char *, const T &v) {
   f.writer() << (int)v;
 }

Original file line number	Diff line number	Diff line change
`@@ -7,6 +7,8 @@`
`7`	`7`
`8`	`8`	`#if FMT_VERSION >= 50000`
`9`	`9`	`#include "spdlog/fmt/bundled/ranges.h"`
	`10`	`+#else`
	`11`	`+#include <type_traits>`
`10`	`12`	`#endif`
`11`	`13`
`12`	`14`	`namespace mmdeploy {`
`@@ -36,7 +38,7 @@ inline void format_arg(BasicFormatter<char> &f, const char *, const mmdeploy::Va`
`36`	`38`	`f.writer() << mmdeploy::format_value(d);`
`37`	`39`	`}`
`38`	`40`
`39`		`-template <typename T, std::enable_if_t<std::is_enum_v<std::decay_t<T> >, bool> = true>`
	`41`	`+template <typename T, std::enable_if_t<std::is_enum<std::decay_t<T> >::value, bool> = true>`
`40`	`42`	`void format_arg(BasicFormatter<char> &f, const char *, const T &v) {`
`41`	`43`	`f.writer() << (int)v;`
`42`	`44`	`}`