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token_paste.h
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#ifndef RBIMPL_TOKEN_PASTE_H /*-*-C++-*-vi:se ft=cpp:*/ #define RBIMPL_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 `RBIMPL` or `rbimpl` 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 #RBIMPL_TOKEN_PASTE. */ #include "ruby/internal/config.h" #include "ruby/internal/compiler_since.h" #include "ruby/internal/has/warning.h" #include "ruby/internal/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 RBIMPL_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 RBIMPL_TOKEN_PASTE(x, y) TOKEN_PASTE(x, y) # pragma GCC diagnostic ignored "-Wundef" # /* > warning: "symbol" is not defined, evaluates to 0 [-Wundef] */ #elif RBIMPL_COMPILER_IS(Intel) # /* Ditto for icc. */ # /* https://gcc.godbolt.org/z/pTwDxE */ # define RBIMPL_TOKEN_PASTE(x, y) TOKEN_PASTE(x, y) # pragma warning(disable: 193) # /* > warning #193: zero used for undefined preprocessing identifier */ #elif RBIMPL_COMPILER_BEFORE(MSVC, 19, 14, 26428) # /* :FIXME: is 19.14 the exact version they supported this? */ # define RBIMPL_TOKEN_PASTE(x, y) TOKEN_PASTE(x, y) # pragma warning(disable: 4668) # /* > warning C4668: 'symbol' is not defined as a preprocessor macro */ #elif RBIMPL_COMPILER_IS(MSVC) # define RBIMPL_TOKEN_PASTE(x, y) \ RBIMPL_WARNING_PUSH() \ RBIMPL_WARNING_IGNORED(4668) \ TOKEN_PASTE(x, y) \ RBIMPL_WARNING_POP() #elif RBIMPL_HAS_WARNING("-Wundef") # define RBIMPL_TOKEN_PASTE(x, y) \ RBIMPL_WARNING_PUSH() \ RBIMPL_WARNING_IGNORED(-Wundef) \ TOKEN_PASTE(x, y) \ RBIMPL_WARNING_POP() #else # /* No way. */ # define RBIMPL_TOKEN_PASTE(x, y) TOKEN_PASTE(x, y) #endif #endif /* RBIMPL_TOKEN_PASTE_H */