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Asked: 2026-06-06T15:03:01+00:00

This works printf(%s body\n,__PRETTY_FUNCTION__); But this does not (Error Expected ‘)’ ): printf(__PRETTY_FUNCTION__ body\n);

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This works

printf("%s body\n",__PRETTY_FUNCTION__);

But this does not (Error Expected ')'):

printf(__PRETTY_FUNCTION__" body\n");

I can’t get the IDE to show me what __PRETTY_FUNCTION__ evaluates to to determine why it does not work.

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1 Answer

  1. Editorial Team

    __PRETTY_FUNCTION__ is not a macro. It behaves like a static variable created on the fly scoped in that function.

    The last paragraph in the link above reads:

    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.

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