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ruby--ruby/include/ruby/regex.h
卜部昌平 4ff3f20540 add #include guard hack
According to MSVC manual (*1), cl.exe can skip including a header file
when that:

- contains #pragma once, or
- starts with #ifndef, or
- starts with #if ! defined.

GCC has a similar trick (*2), but it acts more stricter (e. g. there
must be _no tokens_ outside of #ifndef...#endif).

Sun C lacked #pragma once for a looong time.  Oracle Developer Studio
12.5 finally implemented it, but we cannot assume such recent version.

This changeset modifies header files so that each of them include
strictly one #ifndef...#endif.  I believe this is the most portable way
to trigger compiler optimizations. [Bug ]

*1: https://docs.microsoft.com/en-us/cpp/preprocessor/once
*2: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html
2020-04-13 16:06:00 +09:00

44 lines
1,020 B
C++

#ifndef ONIGURUMA_REGEX_H /*-*-C++-*-vi:se ft=cpp:*/
#define ONIGURUMA_REGEX_H 1
/**
* @file
* @author $Author$
* @copyright Copyright (C) 1993-2007 Yukihiro Matsumoto
* @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.
*/
#if defined(__cplusplus)
extern "C" {
#if 0
} /* satisfy cc-mode */
#endif
#endif
#ifdef RUBY
#include "ruby/oniguruma.h"
#else
#include "oniguruma.h"
#endif
RUBY_SYMBOL_EXPORT_BEGIN
#ifndef ONIG_RUBY_M17N
ONIG_EXTERN OnigEncoding OnigEncDefaultCharEncoding;
#define mbclen(p,e,enc) rb_enc_mbclen((p),(e),(enc))
#endif /* ifndef ONIG_RUBY_M17N */
RUBY_SYMBOL_EXPORT_END
#if defined(__cplusplus)
#if 0
{ /* satisfy cc-mode */
#endif
} /* extern "C" { */
#endif
#endif /* ONIGURUMA_REGEX_H */