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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
65 lines
3 KiB
C++
65 lines
3 KiB
C++
#ifndef RUBY3_ITERATOR_H /*-*-C++-*-vi:se ft=cpp:*/
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#define RUBY3_ITERATOR_H
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/**
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* @file
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* @author Ruby developers <ruby-core@ruby-lang.org>
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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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* @warning Symbols prefixed with either `RUBY3` or `ruby3` are
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* implementation details. Don't take them as canon. They could
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* rapidly appear then vanish. The name (path) of this header file
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* is also an implementation detail. Do not expect it to persist
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* at the place it is now. Developers are free to move it anywhere
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* anytime at will.
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* @note To ruby-core: remember that this header can be possibly
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* recursively included from extension libraries written in C++.
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* Do not expect for instance `__VA_ARGS__` is always available.
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* We assume C99 for ruby itself but we don't assume languages of
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* extension libraries. They could be written in C++98.
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* @brief Block related APIs.
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*/
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#include "ruby/3/attr/noreturn.h"
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#include "ruby/3/dllexport.h"
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#include "ruby/3/value.h"
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RUBY3_SYMBOL_EXPORT_BEGIN()
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#define RB_BLOCK_CALL_FUNC_STRICT 1
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#define RUBY_BLOCK_CALL_FUNC_TAKES_BLOCKARG 1
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#define RB_BLOCK_CALL_FUNC_ARGLIST(yielded_arg, callback_arg) \
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VALUE yielded_arg, VALUE callback_arg, int argc, const VALUE *argv, VALUE blockarg
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typedef VALUE rb_block_call_func(RB_BLOCK_CALL_FUNC_ARGLIST(yielded_arg, callback_arg));
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typedef rb_block_call_func *rb_block_call_func_t;
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VALUE rb_each(VALUE);
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VALUE rb_yield(VALUE);
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VALUE rb_yield_values(int n, ...);
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VALUE rb_yield_values2(int n, const VALUE *argv);
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VALUE rb_yield_values_kw(int n, const VALUE *argv, int kw_splat);
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VALUE rb_yield_splat(VALUE);
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VALUE rb_yield_splat_kw(VALUE, int);
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VALUE rb_yield_block(RB_BLOCK_CALL_FUNC_ARGLIST(yielded_arg, callback_arg)); /* rb_block_call_func */
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int rb_keyword_given_p(void);
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int rb_block_given_p(void);
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void rb_need_block(void);
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VALUE rb_iterate(VALUE(*)(VALUE),VALUE,rb_block_call_func_t,VALUE);
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VALUE rb_block_call(VALUE,ID,int,const VALUE*,rb_block_call_func_t,VALUE);
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VALUE rb_block_call_kw(VALUE,ID,int,const VALUE*,rb_block_call_func_t,VALUE,int);
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VALUE rb_rescue(VALUE(*)(VALUE),VALUE,VALUE(*)(VALUE,VALUE),VALUE);
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VALUE rb_rescue2(VALUE(*)(VALUE),VALUE,VALUE(*)(VALUE,VALUE),VALUE,...);
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VALUE rb_vrescue2(VALUE(*)(VALUE),VALUE,VALUE(*)(VALUE,VALUE),VALUE,va_list);
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VALUE rb_ensure(VALUE(*)(VALUE),VALUE,VALUE(*)(VALUE),VALUE);
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VALUE rb_catch(const char*,rb_block_call_func_t,VALUE);
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VALUE rb_catch_obj(VALUE,rb_block_call_func_t,VALUE);
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RUBY3_ATTR_NORETURN()
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void rb_throw(const char*,VALUE);
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RUBY3_ATTR_NORETURN()
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void rb_throw_obj(VALUE,VALUE);
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RUBY3_SYMBOL_EXPORT_END()
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#endif /* RUBY3_ITERATOR_H */
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