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| author | Tom Tromey <tom@tromey.com> | 2017-11-13 20:17:42 +0000 |
|---|---|---|
| committer | Tom Tromey <tromey@gcc.gnu.org> | 2017-11-13 20:17:42 +0000 |
| commit | fb771b9dad6ef78a985353128cea48e620eb4324 (patch) | |
| tree | d94251e8c98cb3a0a9bfd711707dea469e857c6b /libcpp/internal.h | |
| parent | 4d85d480272fb7331924f04534e0f5f14b60421e (diff) | |
| download | gcc-fb771b9dad6ef78a985353128cea48e620eb4324.zip gcc-fb771b9dad6ef78a985353128cea48e620eb4324.tar.gz gcc-fb771b9dad6ef78a985353128cea48e620eb4324.tar.bz2 | |
Implement __VA_OPT__
This implements __VA_OPT__, a new preprocessor feature added in C++2A.
The paper can be found here:
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0306r4.html
gcc/ChangeLog
* doc/cpp.texi (Variadic Macros): Document __VA_OPT__.
gcc/testsuite/ChangeLog
* c-c++-common/cpp/va-opt-pedantic.c: New file.
* c-c++-common/cpp/va-opt.c: New file.
* c-c++-common/cpp/va-opt-error.c: New file.
libcpp/ChangeLog
* pch.c (cpp_read_state): Set n__VA_OPT__.
* macro.c (vaopt_state): New class.
(_cpp_arguments_ok): Check va_opt flag.
(replace_args, create_iso_definition): Use vaopt_state.
* lex.c (lex_identifier_intern): Possibly issue errors for
__VA_OPT__.
(lex_identifier): Likewise.
(maybe_va_opt_error): New function.
* internal.h (struct lexer_state) <va_args_ok>: Update comment.
(struct spec_nodes) <n__VA_OPT__>: New field.
* init.c (struct lang_flags) <va_opt>: New field.
(lang_defaults): Add entries for C++2A. Update all entries for
va_opt.
(cpp_set_lang): Initialize va_opt.
* include/cpplib.h (struct cpp_options) <va_opt>: New field.
* identifiers.c (_cpp_init_hashtable): Initialize n__VA_OPT__.
From-SVN: r254707
Diffstat (limited to 'libcpp/internal.h')
| -rw-r--r-- | libcpp/internal.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libcpp/internal.h b/libcpp/internal.h index f24e85c..0a33aba 100644 --- a/libcpp/internal.h +++ b/libcpp/internal.h @@ -246,7 +246,7 @@ struct lexer_state all directives apart from #define. */ unsigned char save_comments; - /* Nonzero if lexing __VA_ARGS__ is valid. */ + /* Nonzero if lexing __VA_ARGS__ and __VA_OPT__ are valid. */ unsigned char va_args_ok; /* Nonzero if lexing poisoned identifiers is valid. */ @@ -282,6 +282,7 @@ struct spec_nodes cpp_hashnode *n_true; /* C++ keyword true */ cpp_hashnode *n_false; /* C++ keyword false */ cpp_hashnode *n__VA_ARGS__; /* C99 vararg macros */ + cpp_hashnode *n__VA_OPT__; /* C++ vararg macros */ cpp_hashnode *n__has_include__; /* __has_include__ operator */ cpp_hashnode *n__has_include_next__; /* __has_include_next__ operator */ }; |