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Diffstat (limited to 'include/ruby/impl/token_paste.h')
| -rw-r--r-- | include/ruby/impl/token_paste.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/include/ruby/impl/token_paste.h b/include/ruby/impl/token_paste.h new file mode 100644 index 0000000000..8c765ef706 --- /dev/null +++ b/include/ruby/impl/token_paste.h @@ -0,0 +1,75 @@ +#ifndef RUBY3_TOKEN_PASTE_H /*-*-C++-*-vi:se ft=cpp:*/ +#define RUBY3_TOKEN_PASTE_H +/** + * @file + * @author Ruby developers <ruby-core@ruby-lang.org> + * @copyright This file is a part of the programming language Ruby. + * Permission is hereby granted, to either redistribute and/or + * modify this file, provided that the conditions mentioned in the + * file COPYING are met. Consult the file for details. + * @warning Symbols prefixed with either `RUBY3` or `ruby3` are + * implementation details. Don't take them as canon. They could + * rapidly appear then vanish. The name (path) of this header file + * is also an implementation detail. Do not expect it to persist + * at the place it is now. Developers are free to move it anywhere + * anytime at will. + * @note To ruby-core: remember that this header can be possibly + * recursively included from extension libraries written in C++. + * Do not expect for instance `__VA_ARGS__` is always available. + * We assume C99 for ruby itself but we don't assume languages of + * extension libraries. They could be written in C++98. + * @brief Defines #RUBY3_TOKEN_PASTE. + */ +#include "ruby/3/config.h" +#include "ruby/3/compiler_since.h" +#include "ruby/3/has/warning.h" +#include "ruby/3/warning_push.h" + +/* :TODO: add your compiler here. There are many compilers that can suppress + * warnings via pragmas, but not all of them accept such things inside of `#if` + * and variants' conditions. And such nitpicking behavours tend not be + * documented. Please improve this file when you are really sure about your + * compiler's behaviour. */ + +#if RUBY3_COMPILER_SINCE(GCC, 4, 2, 0) +# /* GCC is one of such compiler who cannot write `_Pragma` inside of a `#if`. +# * Cannot but globally kill everything. This is of course a very bad thing. +# * If you know how to reroute this please tell us. */ +# /* https://gcc.godbolt.org/z/K2xr7X */ +# define RUBY3_TOKEN_PASTE(x, y) TOKEN_PASTE(x, y) +# pragma GCC diagnostic ignored "-Wundef" +# /* > warning: "symbol" is not defined, evaluates to 0 [-Wundef] */ + +#elif RUBY3_COMPILER_IS(Intel) +# /* Ditto for icc. */ +# /* https://gcc.godbolt.org/z/pTwDxE */ +# define RUBY3_TOKEN_PASTE(x, y) TOKEN_PASTE(x, y) +# pragma warning(disable: 193) +# /* > warning #193: zero used for undefined preprocessing identifier */ + +#elif RUBY3_COMPILER_BEFORE(MSVC, 19, 14, 26428) +# /* :FIXME: is 19.14 the exact version they supported this? */ +# define RUBY3_TOKEN_PASTE(x, y) TOKEN_PASTE(x, y) +# pragma warning(disable: 4668) +# /* > warning C4668: 'symbol' is not defined as a preprocessor macro */ + +#elif RUBY3_COMPILER_IS(MSVC) +# define RUBY3_TOKEN_PASTE(x, y) \ + RUBY3_WARNING_PUSH() \ + RUBY3_WARNING_IGNORED(4668) \ + TOKEN_PASTE(x, y) \ + RUBY3_WARNING_POP() + +#elif RUBY3_HAS_WARNING("-Wundef") +# define RUBY3_TOKEN_PASTE(x, y) \ + RUBY3_WARNING_PUSH() \ + RUBY3_WARNING_IGNORED(-Wundef) \ + TOKEN_PASTE(x, y) \ + RUBY3_WARNING_POP() + +#else +# /* No way. */ +# define RUBY3_TOKEN_PASTE(x, y) TOKEN_PASTE(x, y) +#endif + +#endif /* RUBY3_TOKEN_PASTE_H */ |