mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
443389effc
Without this patch, 20k files are opened (openat syscall) because of duplicate includes. This patch reduced it to 3k and build time was reduced compile time of range.o from 15sec -> 3sec on my machine. [Bug #16772]
49 lines
2.2 KiB
C++
49 lines
2.2 KiB
C++
/** \noop-*-C++-*-vi:ft=cpp
|
|
* @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_CAST.
|
|
* @cond INTERNAL_MACRO
|
|
*
|
|
* This casting macro makes sense only inside of other macros that are part of
|
|
* public headers. They could be used from C++, and C-style casts could issue
|
|
* warnings. Ruby internals are pure C so they should not bother.
|
|
*/
|
|
|
|
#if defined(RUBY3_CAST)
|
|
# /* Take that. */
|
|
|
|
#elif ! defined(__cplusplus)
|
|
# define RUBY3_CAST(expr) (expr)
|
|
|
|
#elif RUBY3_COMPILER_SINCE(GCC, 4, 6, 0)
|
|
# /* g++ has -Wold-style-cast since 1997 or so, but its _Pragma is broken. */
|
|
# /* See https://gcc.godbolt.org/z/XWhU6J */
|
|
# define RUBY3_CAST(expr) (expr)
|
|
# pragma GCC diagnostic ignored "-Wold-style-cast"
|
|
|
|
#elif RUBY3_HAS_WARNING("-Wold-style-cast")
|
|
# define RUBY3_CAST(expr) \
|
|
RUBY3_WARNING_PUSH() \
|
|
RUBY3_WARNING_IGNORED(-Wold-style-cast) \
|
|
(expr) \
|
|
RUBY3_WARNING_POP()
|
|
|
|
#else
|
|
# define RUBY3_CAST(expr) (expr)
|
|
#endif
|
|
/** @endcond */
|