mirror of
https://github.com/UberGames/GtkRadiant.git
synced 2024-12-11 13:00:52 +00:00
6ee91d153e
git-svn-id: svn://svn.icculus.org/gtkradiant/GtkRadiant/trunk@44 8a3a26a2-13c4-0310-b231-cf6edde360e5
670 lines
21 KiB
C++
670 lines
21 KiB
C++
/*
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Copyright (C) 2001-2006, William Joseph.
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All Rights Reserved.
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This file is part of GtkRadiant.
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GtkRadiant is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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GtkRadiant is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GtkRadiant; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#if !defined(INCLUDED_GENERIC_CLOSURE_H)
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#define INCLUDED_GENERIC_CLOSURE_H
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/// \file
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/// \brief Type-safe techniques for binding the first argument of an opaque callback.
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#include <cstddef>
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#include "functional.h"
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#include "callbackfwd.h"
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template<typename Type>
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inline void* convertToOpaque(Type* t)
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{
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return t;
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}
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template<typename Type>
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inline void* convertToOpaque(const Type* t)
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{
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return const_cast<Type*>(t);
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}
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template<typename Type>
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inline void* convertToOpaque(Type& t)
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{
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return &t;
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}
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template<typename Type>
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inline void* convertToOpaque(const Type& t)
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{
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return const_cast<Type*>(&t);
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}
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template<typename Type>
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class ConvertFromOpaque
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{
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};
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template<typename Type>
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class ConvertFromOpaque<Type&>
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{
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public:
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static Type& apply(void* p)
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{
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return *static_cast<Type*>(p);
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}
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};
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template<typename Type>
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class ConvertFromOpaque<const Type&>
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{
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public:
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static const Type& apply(void* p)
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{
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return *static_cast<Type*>(p);
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}
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};
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template<typename Type>
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class ConvertFromOpaque<Type*>
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{
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public:
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static Type* apply(void* p)
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{
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return static_cast<Type*>(p);
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}
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};
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template<typename Type>
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class ConvertFromOpaque<const Type*>
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{
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public:
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static const Type* apply(void* p)
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{
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return static_cast<Type*>(p);
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}
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};
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template<typename Caller>
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class BindFirstOpaque
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{
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typedef typename Caller::first_argument_type FirstBound;
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FirstBound firstBound;
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public:
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typedef typename Caller::result_type result_type;
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explicit BindFirstOpaque(FirstBound firstBound) : firstBound(firstBound)
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{
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}
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result_type operator()() const
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{
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return Caller::call(firstBound);
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}
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FirstBound getBound() const
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{
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return firstBound;
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}
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static result_type thunk(void* environment)
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{
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return Caller::call(ConvertFromOpaque<FirstBound>::apply(environment));
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}
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void* getEnvironment() const
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{
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return convertToOpaque(firstBound);
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}
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};
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template<typename Caller>
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class BindFirstOpaque1
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{
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typedef typename Caller::first_argument_type FirstBound;
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FirstBound firstBound;
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public:
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typedef typename Caller::second_argument_type first_argument_type;
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typedef typename Caller::result_type result_type;
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explicit BindFirstOpaque1(FirstBound firstBound) : firstBound(firstBound)
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{
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}
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result_type operator()(first_argument_type a1) const
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{
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return Caller::call(firstBound, a1);
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}
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FirstBound getBound() const
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{
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return firstBound;
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}
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static result_type thunk(void* environment, first_argument_type a1)
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{
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return Caller::call(ConvertFromOpaque<FirstBound>::apply(environment), a1);
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}
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void* getEnvironment() const
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{
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return convertToOpaque(firstBound);
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}
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};
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template<typename Caller>
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class BindFirstOpaque2
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{
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typedef typename Caller::first_argument_type FirstBound;
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FirstBound firstBound;
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public:
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typedef typename Caller::second_argument_type first_argument_type;
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typedef typename Caller::third_argument_type second_argument_type;
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typedef typename Caller::result_type result_type;
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explicit BindFirstOpaque2(FirstBound firstBound) : firstBound(firstBound)
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{
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}
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result_type operator()(first_argument_type a1, second_argument_type a2) const
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{
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return Caller::call(firstBound, a1, a2);
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}
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FirstBound getBound() const
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{
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return firstBound;
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}
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static result_type thunk(void* environment, first_argument_type a1, second_argument_type a2)
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{
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return Caller::call(ConvertFromOpaque<FirstBound>::apply(environment), a1, a2);
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}
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void* getEnvironment() const
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{
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return convertToOpaque(firstBound);
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}
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};
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template<typename Caller>
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class BindFirstOpaque3
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{
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typedef typename Caller::first_argument_type FirstBound;
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FirstBound firstBound;
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public:
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typedef typename Caller::second_argument_type first_argument_type;
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typedef typename Caller::third_argument_type second_argument_type;
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typedef typename Caller::fourth_argument_type third_argument_type;
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typedef typename Caller::result_type result_type;
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explicit BindFirstOpaque3(FirstBound firstBound) : firstBound(firstBound)
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{
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}
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result_type operator()(first_argument_type a1, second_argument_type a2, third_argument_type a3) const
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{
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return Caller::call(firstBound, a1, a2, a3);
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}
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FirstBound getBound() const
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{
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return firstBound;
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}
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static result_type thunk(void* environment, first_argument_type a1, second_argument_type a2, third_argument_type a3)
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{
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return Caller::call(ConvertFromOpaque<FirstBound>::apply(environment), a1, a2, a3);
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}
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void* getEnvironment() const
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{
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return convertToOpaque(firstBound);
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}
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};
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template<typename typename Thunk_>
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class CallbackBase
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{
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void* m_environment;
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Thunk_ m_thunk;
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public:
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typedef Thunk_ Thunk;
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CallbackBase(void* environment, Thunk function) : m_environment(environment), m_thunk(function)
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{
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}
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void* getEnvironment() const
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{
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return m_environment;
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}
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Thunk getThunk() const
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{
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return m_thunk;
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}
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};
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template<typename typename Thunk>
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inline bool operator==(const CallbackBase<Thunk>& self, const CallbackBase<Thunk>& other)
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{
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return self.getEnvironment() == other.getEnvironment() && self.getThunk() == other.getThunk();
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}
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template<typename typename Thunk>
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inline bool operator!=(const CallbackBase<Thunk>& self, const CallbackBase<Thunk>& other)
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{
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return !(self == other);
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}
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template<typename typename Thunk>
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inline bool operator<(const CallbackBase<Thunk>& self, const CallbackBase<Thunk>& other)
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{
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return self.getEnvironment() < other.getEnvironment() ||
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(!(other.getEnvironment() < self.getEnvironment()) && self.getThunk() < other.getThunk());
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}
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/// \brief Combines a void pointer with a pointer to a function which operates on a void pointer.
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///
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/// Use with the callback constructors MemberCaller, ConstMemberCaller, ReferenceCaller, ConstReferenceCaller, PointerCaller, ConstPointerCaller and FreeCaller.
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template<typename Result>
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class Callback0 : public CallbackBase<Result (*)(void*)>
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{
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typedef CallbackBase<Result (*)(void*)> Base;
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static Result nullThunk(void*)
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{
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}
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public:
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typedef Result result_type;
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Callback0() : Base(0, nullThunk)
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{
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}
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template<typename Caller>
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Callback0(const BindFirstOpaque<Caller>& caller) : Base(caller.getEnvironment(), BindFirstOpaque<Caller>::thunk)
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{
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}
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Callback0(void* environment, Thunk function) : Base(environment, function)
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{
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}
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result_type operator()() const
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{
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return getThunk()(getEnvironment());
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}
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};
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template<typename Caller>
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inline Callback0<typename Caller::result_type> makeCallback0(const Caller& caller, typename Caller::first_argument_type callee)
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{
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return Callback0<typename Caller::result_type>(BindFirstOpaque<Caller>(callee));
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}
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template<typename Caller>
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inline Callback0<typename Caller::result_type> makeStatelessCallback0(const Caller& caller)
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{
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return makeCallback0(Caller0To1<Caller>(), 0);
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}
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typedef Callback0<void> Callback;
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/// \brief Combines a void pointer with a pointer to a function which operates on a void pointer and one other argument.
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///
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/// Use with the callback constructors MemberCaller1, ConstMemberCaller1, ReferenceCaller1, ConstReferenceCaller1, PointerCaller1, ConstPointerCaller1 and FreeCaller1.
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template<typename FirstArgument, typename Result>
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class Callback1 : public CallbackBase<Result (*)(void*, FirstArgument)>
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{
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typedef CallbackBase<Result (*)(void*, FirstArgument)> Base;
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static Result nullThunk(void*, FirstArgument)
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{
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}
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public:
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typedef FirstArgument first_argument_type;
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typedef Result result_type;
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Callback1() : Base(0, nullThunk)
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{
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}
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template<typename Caller>
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Callback1(const BindFirstOpaque1<Caller>& caller) : Base(caller.getEnvironment(), BindFirstOpaque1<Caller>::thunk)
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{
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}
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Callback1(void* environment, Thunk function) : Base(environment, function)
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{
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}
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result_type operator()(FirstArgument firstArgument) const
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{
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return getThunk()(getEnvironment(), firstArgument);
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}
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};
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template<typename Caller>
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inline Callback1<typename Caller::second_argument_type, typename Caller::result_type> makeCallback1(const Caller& caller, typename Caller::first_argument_type callee)
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{
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return Callback1<typename Caller::second_argument_type, typename Caller::result_type>(BindFirstOpaque1<Caller>(callee));
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}
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template<typename Caller>
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inline Callback1<typename Caller::second_argument_type, typename Caller::result_type> makeStatelessCallback1(const Caller& caller)
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{
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return makeCallback1(Caller1To2<Caller>(), 0);
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}
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/// \brief Combines a void pointer with a pointer to a function which operates on a void pointer and two other arguments.
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///
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template<typename FirstArgument, typename SecondArgument, typename Result>
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class Callback2 : public CallbackBase<Result (*)(void*, FirstArgument, SecondArgument)>
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{
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typedef CallbackBase<Result (*)(void*, FirstArgument, SecondArgument)> Base;
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static Result nullThunk(void*, FirstArgument, SecondArgument)
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{
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}
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public:
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typedef FirstArgument first_argument_type;
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typedef SecondArgument second_argument_type;
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typedef Result result_type;
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Callback2() : Base(0, nullThunk)
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{
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}
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template<typename Caller>
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Callback2(const BindFirstOpaque2<Caller>& caller) : Base(caller.getEnvironment(), BindFirstOpaque2<Caller>::thunk)
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{
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}
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Callback2(void* environment, Thunk function) : Base(environment, function)
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{
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}
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result_type operator()(FirstArgument firstArgument, SecondArgument secondArgument) const
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{
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return getThunk()(getEnvironment(), firstArgument, secondArgument);
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}
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};
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template<typename Caller>
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inline Callback2<
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typename Caller::second_argument_type,
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typename Caller::third_argument_type,
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typename Caller::result_type
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> makeCallback2(const Caller& caller, typename Caller::first_argument_type callee)
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{
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return Callback2<
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typename Caller::second_argument_type,
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typename Caller::third_argument_type,
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typename Caller::result_type
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>(BindFirstOpaque2<Caller>(callee));
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}
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template<typename Caller>
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inline Callback2<
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typename Caller::first_argument_type,
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typename Caller::second_argument_type,
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typename Caller::result_type
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> makeStatelessCallback2(const Caller& caller)
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{
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return makeCallback2(Caller2To3<Caller>(), 0);
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}
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/// \brief Combines a void pointer with a pointer to a function which operates on a void pointer and three other arguments.
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///
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template<typename FirstArgument, typename SecondArgument, typename ThirdArgument, typename Result>
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class Callback3 : public CallbackBase<Result (*)(void*, FirstArgument, SecondArgument, ThirdArgument)>
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{
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typedef CallbackBase<Result (*)(void*, FirstArgument, SecondArgument, ThirdArgument)> Base;
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static Result nullThunk(void*, FirstArgument, SecondArgument, ThirdArgument)
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{
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}
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public:
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typedef FirstArgument first_argument_type;
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typedef SecondArgument second_argument_type;
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typedef ThirdArgument third_argument_type;
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typedef Result result_type;
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Callback3() : Base(0, nullThunk)
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{
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}
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template<typename Caller>
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Callback3(const BindFirstOpaque3<Caller>& caller) : Base(caller.getEnvironment(), BindFirstOpaque3<Caller>::thunk)
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{
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}
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Callback3(void* environment, Thunk function) : Base(environment, function)
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{
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}
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result_type operator()(FirstArgument firstArgument, SecondArgument secondArgument, ThirdArgument thirdArgument) const
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{
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return getThunk()(getEnvironment(), firstArgument, secondArgument, thirdArgument);
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}
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};
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template<typename Caller>
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inline Callback3<
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typename Caller::second_argument_type,
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typename Caller::third_argument_type,
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typename Caller::fourth_argument_type,
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typename Caller::result_type
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> makeCallback3(const Caller& caller, typename Caller::first_argument_type callee)
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{
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return Callback3<
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typename Caller::second_argument_type,
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typename Caller::third_argument_type,
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typename Caller::fourth_argument_type,
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typename Caller::result_type
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>(BindFirstOpaque3<Caller>(callee));
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}
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template<typename Caller>
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inline Callback3<
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typename Caller::first_argument_type,
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typename Caller::second_argument_type,
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typename Caller::third_argument_type,
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typename Caller::result_type
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> makeStatelessCallback3(const Caller& caller)
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{
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return makeCallback3(Caller3To4<Caller>(), 0);
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}
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/// \brief Forms a Callback from a non-const Environment reference and a non-const Environment member-function.
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///
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/// \dontinclude generic/callback.cpp
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/// \skipline MemberCaller example
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/// \until end example
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template<typename Environment, void (Environment::*member)()>
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class MemberCaller : public BindFirstOpaque< Member<Environment, void, member> >
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{
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public:
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MemberCaller(Environment& environment) : BindFirstOpaque< Member<Environment, void, member> >(environment)
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{
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}
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};
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/// \brief Forms a Callback from a const Environment reference and a const Environment member-function.
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///
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/// \dontinclude generic/callback.cpp
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/// \skipline MemberCaller example
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/// \until end example
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template<typename Environment, void (Environment::*member)() const>
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class ConstMemberCaller : public BindFirstOpaque< ConstMember<Environment, void, member> >
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{
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public:
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ConstMemberCaller(const Environment& environment) : BindFirstOpaque< ConstMember<Environment, void, member> >(environment)
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{
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}
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};
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/// \brief Forms a Callback from a non-const Environment reference and a const Environment member-function which takes one argument.
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template<typename Environment, typename FirstArgument, void (Environment::*member)(FirstArgument)>
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class MemberCaller1 : public BindFirstOpaque1< Member1<Environment, FirstArgument, void, member> >
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{
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public:
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MemberCaller1(Environment& environment) : BindFirstOpaque1< Member1<Environment, FirstArgument, void, member> >(environment)
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{
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}
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};
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/// \brief Forms a Callback from a const Environment reference and a const Environment member-function which takes one argument.
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template<typename Environment, typename FirstArgument, void (Environment::*member)(FirstArgument) const>
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class ConstMemberCaller1 : public BindFirstOpaque1< ConstMember1<Environment, FirstArgument, void, member> >
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{
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public:
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ConstMemberCaller1(const Environment& environment) : BindFirstOpaque1< ConstMember1<Environment, FirstArgument, void, member> >(environment)
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{
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}
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};
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/// \brief Forms a Callback from a non-const Environment reference and a free function which operates on a non-const Environment reference.
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///
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/// \dontinclude generic/callback.cpp
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/// \skipline ReferenceCaller example
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/// \until end example
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template<typename Environment, void (*func)(Environment&)>
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class ReferenceCaller : public BindFirstOpaque< Function1<Environment&, void, func> >
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{
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public:
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ReferenceCaller(Environment& environment) : BindFirstOpaque< Function1<Environment&, void, func> >(environment)
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{
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}
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};
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/// \brief Forms a Callback from a const Environment reference and a free function which operates on a const Environment reference.
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///
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/// \dontinclude generic/callback.cpp
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/// \skipline ReferenceCaller example
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/// \until end example
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template<typename Environment, void (*func)(const Environment&)>
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class ConstReferenceCaller : public BindFirstOpaque< Function1<const Environment&, void, func> >
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{
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|
public:
|
|
ConstReferenceCaller(const Environment& environment) : BindFirstOpaque< Function1<const Environment&, void, func> >(environment)
|
|
{
|
|
}
|
|
};
|
|
|
|
/// \brief Forms a Callback from a non-const Environment reference and a free function which operates on a non-const Environment reference and one other argument.
|
|
template<typename Environment, typename FirstArgument, void (*func)(Environment&, FirstArgument)>
|
|
class ReferenceCaller1 : public BindFirstOpaque1< Function2<Environment&, FirstArgument, void, func> >
|
|
{
|
|
public:
|
|
ReferenceCaller1(Environment& environment) : BindFirstOpaque1< Function2<Environment&, FirstArgument, void, func> >(environment)
|
|
{
|
|
}
|
|
};
|
|
|
|
/// \brief Forms a Callback from a const Environment reference and a free function which operates on a const Environment reference and one other argument.
|
|
template<typename Environment, typename FirstArgument, void (*func)(const Environment&, FirstArgument)>
|
|
class ConstReferenceCaller1 : public BindFirstOpaque1< Function2<const Environment&, FirstArgument, void, func> >
|
|
{
|
|
public:
|
|
ConstReferenceCaller1(const Environment& environment) : BindFirstOpaque1< Function2<const Environment&, FirstArgument, void, func> >(environment)
|
|
{
|
|
}
|
|
};
|
|
|
|
/// \brief Forms a Callback from a non-const Environment pointer and a free function which operates on a non-const Environment pointer.
|
|
template<typename Environment, void (*func)(Environment*)>
|
|
class PointerCaller : public BindFirstOpaque< Function1<Environment*, void, func> >
|
|
{
|
|
public:
|
|
PointerCaller(Environment* environment) : BindFirstOpaque< Function1<Environment*, void, func> >(environment)
|
|
{
|
|
}
|
|
};
|
|
|
|
/// \brief Forms a Callback from a const Environment pointer and a free function which operates on a const Environment pointer.
|
|
template<typename Environment, void (*func)(const Environment*)>
|
|
class ConstPointerCaller : public BindFirstOpaque< Function1<const Environment*, void, func> >
|
|
{
|
|
public:
|
|
ConstPointerCaller(const Environment* environment) : BindFirstOpaque< Function1<const Environment*, void, func> >(environment)
|
|
{
|
|
}
|
|
};
|
|
|
|
/// \brief Forms a Callback from a non-const Environment pointer and a free function which operates on a non-const Environment pointer and one other argument.
|
|
template<typename Environment, typename FirstArgument, void (*func)(Environment*, FirstArgument)>
|
|
class PointerCaller1 : public BindFirstOpaque1< Function2<Environment*, FirstArgument, void, func> >
|
|
{
|
|
public:
|
|
PointerCaller1(Environment* environment) : BindFirstOpaque1< Function2<Environment*, FirstArgument, void, func> >(environment)
|
|
{
|
|
}
|
|
};
|
|
|
|
/// \brief Forms a Callback from a const Environment pointer and a free function which operates on a const Environment pointer and one other argument.
|
|
template<typename Environment, typename FirstArgument, void (*func)(const Environment*, FirstArgument)>
|
|
class ConstPointerCaller1 : public BindFirstOpaque1< Function2<const Environment*, FirstArgument, void, func> >
|
|
{
|
|
public:
|
|
ConstPointerCaller1(const Environment* environment) : BindFirstOpaque1< Function2<const Environment*, FirstArgument, void, func> >(environment)
|
|
{
|
|
}
|
|
};
|
|
|
|
/// \brief Forms a Callback from a free function which takes no arguments.
|
|
template<void (*func)()>
|
|
class FreeCaller : public BindFirstOpaque< Caller0To1< Function0<void, func> > >
|
|
{
|
|
public:
|
|
FreeCaller() : BindFirstOpaque< Caller0To1< Function0<void, func> > >(0)
|
|
{
|
|
}
|
|
};
|
|
|
|
/// \brief Forms a Callback from a free function which takes a single argument.
|
|
template<typename FirstArgument, void (*func)(FirstArgument)>
|
|
class FreeCaller1 : public BindFirstOpaque1< Caller1To2< Function1<FirstArgument, void, func> > >
|
|
{
|
|
public:
|
|
FreeCaller1() : BindFirstOpaque1< Caller1To2< Function1<FirstArgument, void, func> > >(0)
|
|
{
|
|
}
|
|
};
|
|
|
|
|
|
/// \brief Constructs a Callback from a non-const \p functor with zero arguments.
|
|
///
|
|
/// \param Functor Must define \c operator()().
|
|
template<typename Functor>
|
|
inline Callback makeCallback(Functor& functor)
|
|
{
|
|
return Callback(MemberCaller<Functor, &Functor::operator()>(functor));
|
|
}
|
|
|
|
/// \brief Constructs a Callback from a const \p functor with zero arguments.
|
|
///
|
|
/// \param Functor Must define const \c operator()().
|
|
template<typename Functor>
|
|
inline Callback makeCallback(const Functor& functor)
|
|
{
|
|
return Callback(ConstMemberCaller<Functor, &Functor::operator()>(functor));
|
|
}
|
|
|
|
/// \brief Constructs a Callback1 from a non-const \p functor with one argument.
|
|
///
|
|
/// \param Functor Must define \c first_argument_type and \c operator()(first_argument_type).
|
|
template<typename Functor>
|
|
inline Callback1<typename Functor::first_argument_type> makeCallback1(Functor& functor)
|
|
{
|
|
typedef typename Functor::first_argument_type FirstArgument;
|
|
return Callback1<FirstArgument>(MemberCaller1<Functor, FirstArgument, &Functor::operator()>(functor));
|
|
}
|
|
|
|
/// \brief Constructs a Callback1 from a const \p functor with one argument.
|
|
///
|
|
/// \param Functor Must define \c first_argument_type and const \c operator()(first_argument_type).
|
|
template<typename Functor>
|
|
inline Callback1<typename Functor::first_argument_type> makeCallback1(const Functor& functor)
|
|
{
|
|
typedef typename Functor::first_argument_type FirstArgument;
|
|
return Callback1<FirstArgument>(ConstMemberCaller1<Functor, FirstArgument, &Functor::operator()>(functor));
|
|
}
|
|
|
|
|
|
typedef Callback1<bool> BoolImportCallback;
|
|
typedef Callback1<const BoolImportCallback&> BoolExportCallback;
|
|
|
|
typedef Callback1<int> IntImportCallback;
|
|
typedef Callback1<const IntImportCallback&> IntExportCallback;
|
|
|
|
typedef Callback1<float> FloatImportCallback;
|
|
typedef Callback1<const FloatImportCallback&> FloatExportCallback;
|
|
|
|
typedef Callback1<const char*> StringImportCallback;
|
|
typedef Callback1<const StringImportCallback&> StringExportCallback;
|
|
|
|
typedef Callback1<std::size_t> SizeImportCallback;
|
|
typedef Callback1<const SizeImportCallback&> SizeExportCallback;
|
|
|
|
|
|
#endif
|