C＋＋库研究笔记——函数名的宏定义
#endifIn C, __PRETTY_FUNCTION__ is yet another name for __func__. However, in C++, __PRETTY_FUNCTION__ contains the type signature of the function as well as its bare name. For example, this program: extern "C" { extern int printf (char *, ...); } class a { public: void sub (int i) { printf ("__FUNCTION__ = %s\n", __FUNCTION__); printf ("__PRETTY_FUNCTION__ = %s\n", __PRETTY_FUNCTION__); } }; int main (void) { a ax; ax.sub (0); return 0; }gives this output: __FUNCTION__ = sub __PRETTY_FUNCTION__ = void a::sub(int)These identifiers are not preprocessor macros. In GCC 3.3 and earlier, in C only, __FUNCTION__ and __PRETTY_FUNCTION__ were treated as string literals; they could be used to initialize char arrays, and they could be concatenated with other string literals. GCC 3.4 and later treat them as variables, like __func__. In C++, __FUNCTION__ and __PRETTY_FUNCTION__ have always been variables.但是，根据，__FUNCTION__更保险？Macro / keyword which can be used to print out method name?
On GCC you can use __FUNCTION__ and __PRETTY_FUNCTION__.On MSVC you can use __FUNCSIG__ and __FUNCTION__.simple.c: In function `main':simple.c:8: warning: concatenation of string literals with__FUNCTION__ is deprecatedPrint the function name using __FUNCTION__ macro
总结各资料：最好使用__func__？注：__func__是内直变量？？
Since __func__ is not a string literal, you can't concatenate it withanother string literal, but what you can do is
printf("%s %s\n", __func__, __FILE__);
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