[cfe-dev] static_assert without C++11 and with a message?

Howard Hinnant hhinnant at apple.com
Tue Jun 19 19:53:17 PDT 2012

On Jun 19, 2012, at 10:45 PM, Richard Smith wrote:

> Hah, of course, the constant expression rules are tighter in C++98 too
> :) Depending on how much you want to emulate C++11 semantics, you
> could either stick with what you have, or enable full folding with the
> __builtin_constant_p(...) ? ...  : ... hack.

Yeah.  I'm kind of hoping for C++98/03 to just gracefully fade away.  A lot of standards effort was put into making C++11 backward API compatibility and hopefully people will just migrate.  There's a lot of attempted C++11 emulation of libc++ in C++03 mode.  static_assert is the best of it.  Variadic templates is the worst.  And in other places such as move semantics and <tuple>, no attempt is made at all.

The message is:  migrate to -std=c++11 !  It is worth it! :-)


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