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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 #16770] *1: https://docs.microsoft.com/en-us/cpp/preprocessor/once *2: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html
34 lines
1.1 KiB
C++
34 lines
1.1 KiB
C++
#ifndef RUBY_RE_H /*-*-C++-*-vi:se ft=cpp:*/
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#define RUBY_RE_H 1
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/**
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* @file
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* @author $Author$
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* @date Thu Sep 30 14:18:32 JST 1993
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* @copyright Copyright (C) 1993-2007 Yukihiro Matsumoto
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* @copyright This file is a part of the programming language Ruby.
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* Permission is hereby granted, to either redistribute and/or
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* modify this file, provided that the conditions mentioned in the
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* file COPYING are met. Consult the file for details.
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*/
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#include "ruby/3/config.h"
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#include <sys/types.h>
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#include <stdio.h>
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#include "ruby/regex.h"
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#include "ruby/3/core/rmatch.h"
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#include "ruby/3/dllexport.h"
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RUBY3_SYMBOL_EXPORT_BEGIN()
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VALUE rb_reg_regcomp(VALUE);
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long rb_reg_search(VALUE, VALUE, long, int);
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VALUE rb_reg_regsub(VALUE, VALUE, struct re_registers *, VALUE);
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long rb_reg_adjust_startpos(VALUE, VALUE, long, int);
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void rb_match_busy(VALUE);
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VALUE rb_reg_quote(VALUE);
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regex_t *rb_reg_prepare_re(VALUE re, VALUE str);
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int rb_reg_region_copy(struct re_registers *, const struct re_registers *);
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RUBY3_SYMBOL_EXPORT_END()
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#endif /* RUBY_RE_H */
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