__attribute__((format(printf, 1, 2))) for MSVC ?

Question

With GCC, I can specify __attribute__((format(printf, 1, 2))) , telling the compiler that this function takes vararg parameters that are printf format specifiers.

This is very helpful in the cases where I wrap e.g. the vsprintf function family. I can have extern void log_error(const char *format, ...) __attribute__((format(printf, 1, 2)));

And whenever I call this function, gcc will check that the types and number of arguments conform to the given format specifiers as it would for printf, and issue a warning if not.

Does the Microsoft C/C++ compiler have anything similar ?

Answer 1

While GCC checks format specifiers when -Wformat is enabled, VC++ has no such checking, even for standard functions so there is no equivalent to this __artribute__ because there is no equivalent to -Wformat.

I think Microsoft's emphasis on C++ (evidenced by maintaining ISO compliance for C++ while only supporting C89) may be in part the reason why VC++ does not have format specifier checking; in C++ using `' format specifiers are unnecessary.