On Tue, Jan 7, 2014 at 6:25 PM, Howard Hinnant <hhinn...@apple.com> wrote:
> On Jan 7, 2014, at 8:43 PM, Richard Smith <rich...@metafoo.co.uk> wrote: > > > It would be more correct to use "operator\"\"" here (without the trailing > > space). This will generate an incorrect unmangled name for operator""if, > > which can only be written without the space. > > Interesting trivia. Such a suffix can only be standard specified (lacking > a '_' prefix). Are there any other such examples? I experimented with > "do", "for" and "while" with no success. On the clang side, we have a whitelist of permitted non-'_'-prefixed suffixes. This is to avoid gratuitously breaking existing (C++98) code -- if we allowed ""foo for arbitrary foo, we'd break code where foo is defined as a macro (expanding to a string literal). Such code is common, for things like "%8"PRIuS. We /do/ allow arbitrary '_'-prefixed suffixes, and that breaks code like "foo"__FILE__, but such code appears to be less common in practice. The only keyword on our whitelist is "if". Under GCC, the whitelist is anything starting with a lowercase letter, and things like operator""for and operator""while work there (with a warning that they are reserved).
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