OK.
On Tue, Feb 27, 2018 at 9:41 AM, Jonathan Wakely <jwakely....@gmail.com> wrote: > Since the fix for PR c++/80955 any suffix on a string literal that > begins with an underscore is assumed to be a user-defined literal > suffix, not a macro. This assumption is invalid for a suffix beginning > with two underscores, because such names are reserved and can't be used > for UDLs anyway. Checking for exactly one underscore restores support > for macro expansion in cases like "File: "__FILE__ or "Date: "__DATE__ > (which are formally ill-formed but accepted with a warning, as a > conforming extension). > > gcc/testsuite: > > PR preprocessor/84517 > * g++.dg/cpp0x/udlit-macros.C: Expect a warning for ""__FILE__. > > libcpp: > > PR preprocessor/84517 > * lex.c (is_macro_not_literal_suffix): New function. > (lex_raw_string, lex_string): Use is_macro_not_literal_suffix to > decide when to issue -Wliteral-suffix warnings. > > > Tested powerpc64le-linux, OK for trunk?
