diff -r 000000000000 -r e4d67989cc36 ossrv_pub/boost_apis/boost/foreach.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ossrv_pub/boost_apis/boost/foreach.hpp Tue Feb 02 02:01:42 2010 +0200 @@ -0,0 +1,812 @@ +/////////////////////////////////////////////////////////////////////////////// +// foreach.hpp header file +// +// Copyright 2004 Eric Niebler. +// Distributed under the Boost Software License, Version 1.0. (See +// accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt) +// +// Credits: +// Anson Tsao - for the initial inspiration and several good suggestions. +// Thorsten Ottosen - for Boost.Range, and for suggesting a way to detect +// const-qualified rvalues at compile time on VC7.1+ +// Russell Hind - For help porting to Borland +// Alisdair Meredith - For help porting to Borland +// Stefan Slapeta - For help porting to Intel + +#ifndef BOOST_FOREACH + +// MS compatible compilers support #pragma once +#if defined(_MSC_VER) && (_MSC_VER >= 1020) +# pragma once +#endif + +#include +#include // for std::pair + +#include +#include + +// Some compilers let us detect even const-qualified rvalues at compile-time +#if BOOST_WORKAROUND(BOOST_MSVC, >= 1310) \ + || (BOOST_WORKAROUND(__GNUC__, >= 4) && !defined(BOOST_INTEL)) \ + || (BOOST_WORKAROUND(__GNUC__, == 3) && (__GNUC_MINOR__ >= 4) && !defined(BOOST_INTEL)) +# define BOOST_FOREACH_COMPILE_TIME_CONST_RVALUE_DETECTION +#else +// Some compilers allow temporaries to be bound to non-const references. +// These compilers make it impossible to for BOOST_FOREACH to detect +// temporaries and avoid reevaluation of the collection expression. +# if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) \ + || BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) \ + || (BOOST_WORKAROUND(BOOST_INTEL_CXX_VERSION, <= 700) && defined(_MSC_VER)) \ + || BOOST_WORKAROUND(__SUNPRO_CC, BOOST_TESTED_AT(0x570)) \ + || BOOST_WORKAROUND(__DECCXX_VER, BOOST_TESTED_AT(60590042)) +# define BOOST_FOREACH_NO_RVALUE_DETECTION +# endif +// Some compilers do not correctly implement the lvalue/rvalue conversion +// rules of the ternary conditional operator. +# if defined(BOOST_FOREACH_NO_RVALUE_DETECTION) \ + || defined(BOOST_NO_SFINAE) \ + || BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1400)) \ + || BOOST_WORKAROUND(BOOST_INTEL_WIN, <= 810) \ + || BOOST_WORKAROUND(__GNUC__, < 3) \ + || (BOOST_WORKAROUND(__GNUC__, == 3) && (__GNUC_MINOR__ <= 2)) \ + || (BOOST_WORKAROUND(__GNUC__, == 3) && (__GNUC_MINOR__ <= 3) && defined(__APPLE_CC__)) \ + || BOOST_WORKAROUND(__IBMCPP__, BOOST_TESTED_AT(600)) \ + || BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3206)) +# define BOOST_FOREACH_NO_CONST_RVALUE_DETECTION +# else +# define BOOST_FOREACH_RUN_TIME_CONST_RVALUE_DETECTION +# endif +#endif + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef BOOST_FOREACH_RUN_TIME_CONST_RVALUE_DETECTION +# include +# include +# include +# include +#endif + +// This must be at global scope, hence the uglified name +enum boost_foreach_argument_dependent_lookup_hack +{ + boost_foreach_argument_dependent_lookup_hack_value +}; + +namespace boost +{ + +// forward declarations for iterator_range +template +class iterator_range; + +// forward declarations for sub_range +template +class sub_range; + +namespace foreach +{ + /////////////////////////////////////////////////////////////////////////////// + // in_range + // + template + inline std::pair in_range(T begin, T end) + { + return std::make_pair(begin, end); + } + + /////////////////////////////////////////////////////////////////////////////// + // boost::foreach::tag + // + typedef boost_foreach_argument_dependent_lookup_hack tag; + + /////////////////////////////////////////////////////////////////////////////// + // boost::foreach::is_lightweight_proxy + // Specialize this for user-defined collection types if they are inexpensive to copy. + // This tells BOOST_FOREACH it can avoid the rvalue/lvalue detection stuff. + template + struct is_lightweight_proxy + : boost::mpl::false_ + { + }; + + /////////////////////////////////////////////////////////////////////////////// + // boost::foreach::is_noncopyable + // Specialize this for user-defined collection types if they cannot be copied. + // This also tells BOOST_FOREACH to avoid the rvalue/lvalue detection stuff. + template + struct is_noncopyable + #if !defined(BOOST_BROKEN_IS_BASE_AND_DERIVED) && !defined(BOOST_NO_IS_ABSTRACT) + : boost::mpl::or_< + boost::is_abstract + , boost::is_base_and_derived + > + #elif !defined(BOOST_BROKEN_IS_BASE_AND_DERIVED) + : boost::is_base_and_derived + #elif !defined(BOOST_NO_IS_ABSTRACT) + : boost::is_abstract + #else + : boost::mpl::false_ + #endif + { + }; + +} // namespace foreach + +} // namespace boost + +// vc6/7 needs help ordering the following overloads +#ifdef BOOST_NO_FUNCTION_TEMPLATE_ORDERING +# define BOOST_FOREACH_TAG_DEFAULT ... +#else +# define BOOST_FOREACH_TAG_DEFAULT boost::foreach::tag +#endif + +/////////////////////////////////////////////////////////////////////////////// +// boost_foreach_is_lightweight_proxy +// Another customization point for the is_lightweight_proxy optimization, +// this one works on legacy compilers. Overload boost_foreach_is_lightweight_proxy +// at the global namespace for your type. +template +inline boost::foreach::is_lightweight_proxy * +boost_foreach_is_lightweight_proxy(T *&, BOOST_FOREACH_TAG_DEFAULT) { return 0; } + +template +inline boost::mpl::true_ * +boost_foreach_is_lightweight_proxy(std::pair *&, boost::foreach::tag) { return 0; } + +template +inline boost::mpl::true_ * +boost_foreach_is_lightweight_proxy(boost::iterator_range *&, boost::foreach::tag) { return 0; } + +template +inline boost::mpl::true_ * +boost_foreach_is_lightweight_proxy(boost::sub_range *&, boost::foreach::tag) { return 0; } + +template +inline boost::mpl::true_ * +boost_foreach_is_lightweight_proxy(T **&, boost::foreach::tag) { return 0; } + +/////////////////////////////////////////////////////////////////////////////// +// boost_foreach_is_noncopyable +// Another customization point for the is_noncopyable trait, +// this one works on legacy compilers. Overload boost_foreach_is_noncopyable +// at the global namespace for your type. +template +inline boost::foreach::is_noncopyable * +boost_foreach_is_noncopyable(T *&, BOOST_FOREACH_TAG_DEFAULT) { return 0; } + +namespace boost +{ + +namespace foreach_detail_ +{ + +/////////////////////////////////////////////////////////////////////////////// +// Define some utilities for assessing the properties of expressions +// +typedef char yes_type; +typedef char (&no_type)[2]; +yes_type is_true(boost::mpl::true_ *); +no_type is_true(boost::mpl::false_ *); + +// Extracts the desired property from the expression without evaluating it +#define BOOST_FOREACH_PROTECT(expr) \ + (static_cast *>(0)) + +template +inline boost::mpl::and_ *and_(Bool1 *, Bool2 *) { return 0; } + +template +inline boost::mpl::and_ *and_(Bool1 *, Bool2 *, Bool3 *) { return 0; } + +template +inline boost::mpl::or_ *or_(Bool1 *, Bool2 *) { return 0; } + +template +inline boost::mpl::or_ *or_(Bool1 *, Bool2 *, Bool3 *) { return 0; } + +template +inline boost::mpl::not_ *not_(Bool *) { return 0; } + +template +inline boost::mpl::false_ *is_rvalue_(T &, int) { return 0; } + +template +inline boost::mpl::true_ *is_rvalue_(T const &, ...) { return 0; } + +template +inline boost::is_array *is_array_(T const &) { return 0; } + +template +inline boost::is_const *is_const_(T &) { return 0; } + +#ifndef BOOST_FOREACH_NO_RVALUE_DETECTION +template +inline boost::mpl::true_ *is_const_(T const &) { return 0; } +#endif + +/////////////////////////////////////////////////////////////////////////////// +// auto_any_t/auto_any +// General utility for putting an object of any type into automatic storage +struct auto_any_base +{ + // auto_any_base must evaluate to false in boolean context so that + // they can be declared in if() statements. + operator bool() const + { + return false; + } +}; + +template +struct auto_any : auto_any_base +{ + auto_any(T const &t) + : item(t) + { + } + + // temporaries of type auto_any will be bound to const auto_any_base + // references, but we still want to be able to mutate the stored + // data, so declare it as mutable. + mutable T item; +}; + +typedef auto_any_base const &auto_any_t; + +template +inline BOOST_DEDUCED_TYPENAME boost::mpl::if_::type &auto_any_cast(auto_any_t a) +{ + return static_cast const &>(a).item; +} + +typedef boost::mpl::true_ const_; + +/////////////////////////////////////////////////////////////////////////////// +// type2type +// +template +struct type2type + : boost::mpl::if_ +{ +}; + +template +struct foreach_iterator +{ + typedef BOOST_DEDUCED_TYPENAME boost::mpl::eval_if< + C + , range_const_iterator + , range_iterator + >::type type; +}; + +template +struct foreach_reference + : iterator_reference::type> +{ +}; + +/////////////////////////////////////////////////////////////////////////////// +// encode_type +// +template +inline type2type *encode_type(T &, boost::mpl::false_ *) { return 0; } + +template +inline type2type *encode_type(T const &, boost::mpl::true_ *) { return 0; } + +/////////////////////////////////////////////////////////////////////////////// +// set_false +// +inline bool set_false(bool &b) { return b = false; } + +/////////////////////////////////////////////////////////////////////////////// +// to_ptr +// +template +inline T *&to_ptr(T const &) +{ + static T *t = 0; + return t; +} + +// Borland needs a little extra help with arrays +#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) +template +inline T (*&to_ptr(T (&)[N]))[N] +{ + static T (*t)[N] = 0; + return t; +} +#endif + +/////////////////////////////////////////////////////////////////////////////// +// derefof +// +template +inline T &derefof(T *t) +{ + // This is a work-around for a compiler bug in Borland. If T* is a pointer to array type U(*)[N], + // then dereferencing it results in a U* instead of U(&)[N]. The cast forces the issue. + return reinterpret_cast( + *const_cast( + reinterpret_cast(t) + ) + ); +} + +#ifdef BOOST_FOREACH_COMPILE_TIME_CONST_RVALUE_DETECTION +/////////////////////////////////////////////////////////////////////////////// +// Detect at compile-time whether an expression yields an rvalue or +// an lvalue. This is rather non-standard, but some popular compilers +// accept it. +/////////////////////////////////////////////////////////////////////////////// + +/////////////////////////////////////////////////////////////////////////////// +// rvalue_probe +// +template +struct rvalue_probe +{ + struct private_type_ {}; + // can't ever return an array by value + typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_< + boost::mpl::or_, boost::is_array >, private_type_, T + >::type value_type; + operator value_type(); + operator T &() const; +}; + +template +rvalue_probe const make_probe(T const &t); + +# define BOOST_FOREACH_IS_RVALUE(COL) \ + boost::foreach_detail_::and_( \ + boost::foreach_detail_::not_(boost::foreach_detail_::is_array_(COL)) \ + , BOOST_FOREACH_PROTECT(boost::foreach_detail_::is_rvalue_( \ + (true ? boost::foreach_detail_::make_probe(COL) : (COL)), 0))) + +#elif defined(BOOST_FOREACH_RUN_TIME_CONST_RVALUE_DETECTION) +/////////////////////////////////////////////////////////////////////////////// +// Detect at run-time whether an expression yields an rvalue +// or an lvalue. This is 100% standard C++, but not all compilers +// accept it. Also, it causes FOREACH to break when used with non- +// copyable collection types. +/////////////////////////////////////////////////////////////////////////////// + +/////////////////////////////////////////////////////////////////////////////// +// rvalue_probe +// +template +struct rvalue_probe +{ + rvalue_probe(T &t, bool &b) + : value(t) + , is_rvalue(b) + { + } + + struct private_type_ {}; + // can't ever return an array or an abstract type by value + #ifdef BOOST_NO_IS_ABSTRACT + typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_< + boost::is_array, private_type_, T + >::type value_type; + #else + typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_< + boost::mpl::or_, boost::is_array >, private_type_, T + >::type value_type; + #endif + + operator value_type() + { + this->is_rvalue = true; + return this->value; + } + + operator T &() const + { + return this->value; + } + +private: + T &value; + bool &is_rvalue; +}; + +template +rvalue_probe make_probe(T &t, bool &b) { return rvalue_probe(t, b); } + +template +rvalue_probe make_probe(T const &t, bool &b) { return rvalue_probe(t, b); } + +/////////////////////////////////////////////////////////////////////////////// +// simple_variant +// holds either a T or a T const* +template +struct simple_variant +{ + simple_variant(T const *t) + : is_rvalue(false) + { + *static_cast(this->data.address()) = t; + } + + simple_variant(T const &t) + : is_rvalue(true) + { + ::new(this->data.address()) T(t); + } + + simple_variant(simple_variant const &that) + : is_rvalue(that.is_rvalue) + { + if(this->is_rvalue) + ::new(this->data.address()) T(*that.get()); + else + *static_cast(this->data.address()) = that.get(); + } + + ~simple_variant() + { + if(this->is_rvalue) + this->get()->~T(); + } + + T const *get() const + { + if(this->is_rvalue) + return static_cast(this->data.address()); + else + return *static_cast(this->data.address()); + } + +private: + enum size_type { size = sizeof(T) > sizeof(T*) ? sizeof(T) : sizeof(T*) }; + simple_variant &operator =(simple_variant const &); + bool const is_rvalue; + aligned_storage data; +}; + +// If the collection is an array or is noncopyable, it must be an lvalue. +// If the collection is a lightweight proxy, treat it as an rvalue +// BUGBUG what about a noncopyable proxy? +template +inline BOOST_DEDUCED_TYPENAME boost::enable_if, IsProxy>::type * +should_copy_impl(LValue *, IsProxy *, bool *) +{ + return 0; +} + +// Otherwise, we must determine at runtime whether it's an lvalue or rvalue +inline bool * +should_copy_impl(boost::mpl::false_ *, boost::mpl::false_ *, bool *is_rvalue) +{ + return is_rvalue; +} + +#endif + +/////////////////////////////////////////////////////////////////////////////// +// contain +// +template +inline auto_any contain(T const &t, boost::mpl::true_ *) // rvalue +{ + return t; +} + +template +inline auto_any contain(T &t, boost::mpl::false_ *) // lvalue +{ + // Cannot seem to get sunpro to handle addressof() with array types. + #if BOOST_WORKAROUND(__SUNPRO_CC, BOOST_TESTED_AT(0x570)) + return &t; + #else + return boost::addressof(t); + #endif +} + +#ifdef BOOST_FOREACH_RUN_TIME_CONST_RVALUE_DETECTION +template +auto_any > +contain(T const &t, bool *rvalue) +{ + return *rvalue ? simple_variant(t) : simple_variant(&t); +} +#endif + +///////////////////////////////////////////////////////////////////////////// +// begin +// +template +inline auto_any::type> +begin(auto_any_t col, type2type *, boost::mpl::true_ *) // rvalue +{ + return boost::begin(auto_any_cast(col)); +} + +template +inline auto_any::type> +begin(auto_any_t col, type2type *, boost::mpl::false_ *) // lvalue +{ + typedef BOOST_DEDUCED_TYPENAME type2type::type type; + typedef BOOST_DEDUCED_TYPENAME foreach_iterator::type iterator; + return iterator(boost::begin(derefof(auto_any_cast(col)))); +} + +#ifdef BOOST_FOREACH_RUN_TIME_CONST_RVALUE_DETECTION +template +auto_any::type> +begin(auto_any_t col, type2type *, bool *) +{ + return boost::begin(*auto_any_cast, boost::mpl::false_>(col).get()); +} +#endif + +/////////////////////////////////////////////////////////////////////////////// +// end +// +template +inline auto_any::type> +end(auto_any_t col, type2type *, boost::mpl::true_ *) // rvalue +{ + return boost::end(auto_any_cast(col)); +} + +template +inline auto_any::type> +end(auto_any_t col, type2type *, boost::mpl::false_ *) // lvalue +{ + typedef BOOST_DEDUCED_TYPENAME type2type::type type; + typedef BOOST_DEDUCED_TYPENAME foreach_iterator::type iterator; + return iterator(boost::end(derefof(auto_any_cast(col)))); +} + +#ifdef BOOST_FOREACH_RUN_TIME_CONST_RVALUE_DETECTION +template +auto_any::type> +end(auto_any_t col, type2type *, bool *) +{ + return boost::end(*auto_any_cast, boost::mpl::false_>(col).get()); +} +#endif + +#ifndef BOOST_NO_FUNCTION_TEMPLATE_ORDERING +template +inline auto_any +end(auto_any_t col, type2type *, boost::mpl::true_ *) // null-terminated C-style strings +{ + return 0; // not used +} +#endif + +/////////////////////////////////////////////////////////////////////////////// +// done +// +template +inline bool done(auto_any_t cur, auto_any_t end, type2type *) +{ + typedef BOOST_DEDUCED_TYPENAME foreach_iterator::type iter_t; + return auto_any_cast(cur) == auto_any_cast(end); +} + +#ifndef BOOST_NO_FUNCTION_TEMPLATE_ORDERING +template +inline bool done(auto_any_t cur, auto_any_t, type2type *) // null-terminated C-style strings +{ + return ! *auto_any_cast(cur); +} +#endif + +/////////////////////////////////////////////////////////////////////////////// +// next +// +template +inline void next(auto_any_t cur, type2type *) +{ + typedef BOOST_DEDUCED_TYPENAME foreach_iterator::type iter_t; + ++auto_any_cast(cur); +} + +/////////////////////////////////////////////////////////////////////////////// +// deref +// +template +inline BOOST_DEDUCED_TYPENAME foreach_reference::type +deref(auto_any_t cur, type2type *) +{ + typedef BOOST_DEDUCED_TYPENAME foreach_iterator::type iter_t; + return *auto_any_cast(cur); +} + +} // namespace foreach_detail_ +} // namespace boost + +// A sneaky way to get the type of the collection without evaluating the expression +#define BOOST_FOREACH_TYPEOF(COL) \ + (true ? 0 : boost::foreach_detail_::encode_type(COL, boost::foreach_detail_::is_const_(COL))) + +// returns true_* if the type is noncopyable +#define BOOST_FOREACH_IS_NONCOPYABLE(COL) \ + boost_foreach_is_noncopyable( \ + boost::foreach_detail_::to_ptr(COL) \ + , boost_foreach_argument_dependent_lookup_hack_value) + +// returns true_* if the type is a lightweight proxy (and is not noncopyable) +#define BOOST_FOREACH_IS_LIGHTWEIGHT_PROXY(COL) \ + boost::foreach_detail_::and_( \ + boost::foreach_detail_::not_(BOOST_FOREACH_IS_NONCOPYABLE(COL)) \ + , boost_foreach_is_lightweight_proxy( \ + boost::foreach_detail_::to_ptr(COL) \ + , boost_foreach_argument_dependent_lookup_hack_value)) + +#ifdef BOOST_FOREACH_COMPILE_TIME_CONST_RVALUE_DETECTION +/////////////////////////////////////////////////////////////////////////////// +// R-values and const R-values supported here with zero runtime overhead +/////////////////////////////////////////////////////////////////////////////// + +// No variable is needed to track the rvalue-ness of the collection expression +# define BOOST_FOREACH_PREAMBLE() \ + /**/ + +// Evaluate the collection expression +# define BOOST_FOREACH_EVALUATE(COL) \ + (COL) + +# define BOOST_FOREACH_SHOULD_COPY(COL) \ + (true ? 0 : boost::foreach_detail_::or_( \ + BOOST_FOREACH_IS_RVALUE(COL) \ + , BOOST_FOREACH_IS_LIGHTWEIGHT_PROXY(COL))) + +#elif defined(BOOST_FOREACH_RUN_TIME_CONST_RVALUE_DETECTION) +/////////////////////////////////////////////////////////////////////////////// +// R-values and const R-values supported here +/////////////////////////////////////////////////////////////////////////////// + +// Declare a variable to track the rvalue-ness of the collection expression +# define BOOST_FOREACH_PREAMBLE() \ + if (bool _foreach_is_rvalue = false) {} else + +// Evaluate the collection expression, and detect if it is an lvalue or and rvalue +# define BOOST_FOREACH_EVALUATE(COL) \ + (true ? boost::foreach_detail_::make_probe((COL), _foreach_is_rvalue) : (COL)) + +// The rvalue/lvalue-ness of the collection expression is determined dynamically, unless +// type type is an array or is noncopyable or is non-const, in which case we know it's an lvalue. +// If the type happens to be a lightweight proxy, always make a copy. +# define BOOST_FOREACH_SHOULD_COPY(COL) \ + (boost::foreach_detail_::should_copy_impl( \ + true ? 0 : boost::foreach_detail_::or_( \ + boost::foreach_detail_::is_array_(COL) \ + , BOOST_FOREACH_IS_NONCOPYABLE(COL) \ + , boost::foreach_detail_::not_(boost::foreach_detail_::is_const_(COL))) \ + , true ? 0 : BOOST_FOREACH_IS_LIGHTWEIGHT_PROXY(COL) \ + , &_foreach_is_rvalue)) + +#elif !defined(BOOST_FOREACH_NO_RVALUE_DETECTION) +/////////////////////////////////////////////////////////////////////////////// +// R-values supported here, const R-values NOT supported here +/////////////////////////////////////////////////////////////////////////////// + +// No variable is needed to track the rvalue-ness of the collection expression +# define BOOST_FOREACH_PREAMBLE() \ + /**/ + +// Evaluate the collection expression +# define BOOST_FOREACH_EVALUATE(COL) \ + (COL) + +// Determine whether the collection expression is an lvalue or an rvalue. +// NOTE: this gets the answer wrong for const rvalues. +# define BOOST_FOREACH_SHOULD_COPY(COL) \ + (true ? 0 : boost::foreach_detail_::or_( \ + boost::foreach_detail_::is_rvalue_((COL), 0) \ + , BOOST_FOREACH_IS_LIGHTWEIGHT_PROXY(COL))) + +#else +/////////////////////////////////////////////////////////////////////////////// +// R-values NOT supported here +/////////////////////////////////////////////////////////////////////////////// + +// No variable is needed to track the rvalue-ness of the collection expression +# define BOOST_FOREACH_PREAMBLE() \ + /**/ + +// Evaluate the collection expression +# define BOOST_FOREACH_EVALUATE(COL) \ + (COL) + +// Can't use rvalues with BOOST_FOREACH (unless they are lightweight proxies) +# define BOOST_FOREACH_SHOULD_COPY(COL) \ + (true ? 0 : BOOST_FOREACH_IS_LIGHTWEIGHT_PROXY(COL)) + +#endif + +#define BOOST_FOREACH_CONTAIN(COL) \ + boost::foreach_detail_::contain( \ + BOOST_FOREACH_EVALUATE(COL) \ + , BOOST_FOREACH_SHOULD_COPY(COL)) + +#define BOOST_FOREACH_BEGIN(COL) \ + boost::foreach_detail_::begin( \ + _foreach_col \ + , BOOST_FOREACH_TYPEOF(COL) \ + , BOOST_FOREACH_SHOULD_COPY(COL)) + +#define BOOST_FOREACH_END(COL) \ + boost::foreach_detail_::end( \ + _foreach_col \ + , BOOST_FOREACH_TYPEOF(COL) \ + , BOOST_FOREACH_SHOULD_COPY(COL)) + +#define BOOST_FOREACH_DONE(COL) \ + boost::foreach_detail_::done( \ + _foreach_cur \ + , _foreach_end \ + , BOOST_FOREACH_TYPEOF(COL)) + +#define BOOST_FOREACH_NEXT(COL) \ + boost::foreach_detail_::next( \ + _foreach_cur \ + , BOOST_FOREACH_TYPEOF(COL)) + +#define BOOST_FOREACH_DEREF(COL) \ + boost::foreach_detail_::deref( \ + _foreach_cur \ + , BOOST_FOREACH_TYPEOF(COL)) + +/////////////////////////////////////////////////////////////////////////////// +// BOOST_FOREACH +// +// For iterating over collections. Collections can be +// arrays, null-terminated strings, or STL containers. +// The loop variable can be a value or reference. For +// example: +// +// std::list int_list(/*stuff*/); +// BOOST_FOREACH(int &i, int_list) +// { +// /* +// * loop body goes here. +// * i is a reference to the int in int_list. +// */ +// } +// +// Alternately, you can declare the loop variable first, +// so you can access it after the loop finishes. Obviously, +// if you do it this way, then the loop variable cannot be +// a reference. +// +// int i; +// BOOST_FOREACH(i, int_list) +// { ... } +// +#define BOOST_FOREACH(VAR, COL) \ + BOOST_FOREACH_PREAMBLE() \ + if (boost::foreach_detail_::auto_any_t _foreach_col = BOOST_FOREACH_CONTAIN(COL)) {} else \ + if (boost::foreach_detail_::auto_any_t _foreach_cur = BOOST_FOREACH_BEGIN(COL)) {} else \ + if (boost::foreach_detail_::auto_any_t _foreach_end = BOOST_FOREACH_END(COL)) {} else \ + for (bool _foreach_continue = true; \ + _foreach_continue && !BOOST_FOREACH_DONE(COL); \ + _foreach_continue ? BOOST_FOREACH_NEXT(COL) : (void)0) \ + if (boost::foreach_detail_::set_false(_foreach_continue)) {} else \ + for (VAR = BOOST_FOREACH_DEREF(COL); !_foreach_continue; _foreach_continue = true) + +#endif