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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\xpressive\proto\transform\apply.hpp
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/////////////////////////////////////////////////////////////////////////////// /// \file apply.hpp /// Proto transforms for applying MPL placeholder expressions. // // Copyright 2007 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) #ifndef BOOST_PROTO_TRANSFORM_APPLY_HPP_EAN_06_23_2007 #define BOOST_PROTO_TRANSFORM_APPLY_HPP_EAN_06_23_2007 #include
#include
#include
// is_transform #include
namespace boost { namespace proto { namespace transform { namespace detail { struct any { template
any(T const &) {} }; struct default_factory { default_factory() {} default_factory const &operator()() const { return *this; } default_factory const &operator()(any) const { return *this; } default_factory const &operator()(any, any) const { return *this; } default_factory const &operator()(any, any, any) const { return *this; } template
operator T() const { return T(); } }; } // Always return the specified type/object template
struct always : Grammar { always() {} template
struct apply { typedef Always type; }; template
static Always call(Expr const &, State const &, Visitor &) { return Factory()(); } }; // Apply an MPL lambda, passing just Expr template
struct apply1 : Grammar { apply1() {} template
struct apply : mpl::apply1
::type> {}; template
static typename apply
::type call(Expr const &expr, State const &state, Visitor &visitor) { return Factory()(Grammar::call(expr, state, visitor)); } }; // Apply an MPL lambda, passing Expr and State template
struct apply2 : Grammar { apply2() {} template
struct apply : mpl::apply2
::type, State> {}; template
static typename apply
::type call(Expr const &expr, State const &state, Visitor &visitor) { return Factory()(Grammar::call(expr, state, visitor), state); } }; // Apply an MPL lambda, passing Expr, State and Visitor template
struct apply3 : Grammar { apply3() {} template
struct apply : mpl::apply3
::type, State, Visitor> {}; template
static typename apply
::type call(Expr const &expr, State const &state, Visitor &visitor) { return Factory()(Grammar::call(expr, state, visitor), state, visitor); } }; }}} namespace boost { namespace proto { template
struct is_transform
> : mpl::true_ {}; template
struct is_transform
> : mpl::true_ {}; template
struct is_transform
> : mpl::true_ {}; template
struct is_transform
> : mpl::true_ {}; }} #endif
apply.hpp
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