From fb771b9dad6ef78a985353128cea48e620eb4324 Mon Sep 17 00:00:00 2001 From: Tom Tromey Date: Mon, 13 Nov 2017 20:17:42 +0000 Subject: 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) : Update comment. (struct spec_nodes) : New field. * init.c (struct lang_flags) : 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) : New field. * identifiers.c (_cpp_init_hashtable): Initialize n__VA_OPT__. From-SVN: r254707 --- libcpp/include/cpplib.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'libcpp/include') diff --git a/libcpp/include/cpplib.h b/libcpp/include/cpplib.h index 5a14858..101b33a 100644 --- a/libcpp/include/cpplib.h +++ b/libcpp/include/cpplib.h @@ -478,6 +478,9 @@ struct cpp_options /* Nonzero for C++ 2014 Standard digit separators. */ unsigned char digit_separators; + /* Nonzero for C++2a __VA_OPT__ feature. */ + unsigned char va_opt; + /* Holds the name of the target (execution) character set. */ const char *narrow_charset; -- cgit v1.1