Changed pass-by-value to pass-by-reference.
git-svn-id: svn://svn.code.sf.net/p/loki-lib/code/trunk@984 7ec92016-0320-0410-acc4-a06ded1c099a
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1 changed files with 48 additions and 48 deletions
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@ -2,14 +2,14 @@
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// The Loki Library
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// Copyright (c) 2001 by Andrei Alexandrescu
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// This code accompanies the book:
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// Alexandrescu, Andrei. "Modern C++ Design: Generic Programming and Design
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// Alexandrescu, Andrei. "Modern C++ Design: Generic Programming and Design
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// Patterns Applied". Copyright (c) 2001. Addison-Wesley.
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// Permission to use, copy, modify, distribute and sell this software for any
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// purpose is hereby granted without fee, provided that the above copyright
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// notice appear in all copies and that both that copyright notice and this
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// Permission to use, copy, modify, distribute and sell this software for any
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// purpose is hereby granted without fee, provided that the above copyright
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// notice appear in all copies and that both that copyright notice and this
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// permission notice appear in supporting documentation.
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// The author or Addison-Wesley Longman make no representations about the
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// suitability of this software for any purpose. It is provided "as is"
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// The author or Addison-Wesley Longman make no representations about the
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// suitability of this software for any purpose. It is provided "as is"
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// without express or implied warranty.
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////////////////////////////////////////////////////////////////////////////////
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#ifndef LOKI_MULTIMETHODS_INC_
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@ -38,18 +38,18 @@ namespace Loki
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namespace Private
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{
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template <class SomeLhs, class SomeRhs,
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template <class SomeLhs, class SomeRhs,
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class Executor, typename ResultType>
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struct InvocationTraits
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{
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static ResultType
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DoDispatch(SomeLhs& lhs, SomeRhs& rhs,
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static ResultType
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DoDispatch(SomeLhs& lhs, SomeRhs& rhs,
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Executor& exec, Int2Type<false>)
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{
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return exec.Fire(lhs, rhs);
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}
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static ResultType
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DoDispatch(SomeLhs& lhs, SomeRhs& rhs,
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static ResultType
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DoDispatch(SomeLhs& lhs, SomeRhs& rhs,
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Executor& exec, Int2Type<true>)
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{
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return exec.Fire(rhs, lhs);
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@ -65,7 +65,7 @@ namespace Loki
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template
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<
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class Executor,
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class BaseLhs,
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class BaseLhs,
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class TypesLhs,
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bool symmetric = true,
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class BaseRhs = BaseLhs,
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@ -76,35 +76,35 @@ namespace Loki
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{
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template <class SomeLhs>
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static ResultType DispatchRhs(SomeLhs& lhs, BaseRhs& rhs,
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Executor exec, NullType)
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Executor & exec, NullType)
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{ return exec.OnError(lhs, rhs); }
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template <class Head, class Tail, class SomeLhs>
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static ResultType DispatchRhs(SomeLhs& lhs, BaseRhs& rhs,
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Executor exec, Typelist<Head, Tail>)
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{
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Executor & exec, Typelist<Head, Tail>)
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{
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if (Head* p2 = dynamic_cast<Head*>(&rhs))
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{
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Int2Type<(symmetric &&
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int(TL::IndexOf<TypesRhs, Head>::value) <
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int(TL::IndexOf<TypesLhs, SomeLhs>::value))> i2t;
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typedef Private::InvocationTraits<
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typedef Private::InvocationTraits<
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SomeLhs, Head, Executor, ResultType> CallTraits;
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return CallTraits::DoDispatch(lhs, *p2, exec, i2t);
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}
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return DispatchRhs(lhs, rhs, exec, Tail());
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}
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static ResultType DispatchLhs(BaseLhs& lhs, BaseRhs& rhs,
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Executor exec, NullType)
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Executor & exec, NullType)
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{ return exec.OnError(lhs, rhs); }
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template <class Head, class Tail>
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static ResultType DispatchLhs(BaseLhs& lhs, BaseRhs& rhs,
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Executor exec, Typelist<Head, Tail>)
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{
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Executor & exec, Typelist<Head, Tail>)
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{
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if (Head* p1 = dynamic_cast<Head*>(&lhs))
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{
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return DispatchRhs(*p1, rhs, exec, TypesRhs());
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@ -114,10 +114,10 @@ namespace Loki
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public:
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static ResultType Go(BaseLhs& lhs, BaseRhs& rhs,
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Executor exec)
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Executor & exec)
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{ return DispatchLhs(lhs, rhs, exec, TypesLhs()); }
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};
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////////////////////////////////////////////////////////////////////////////////
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// class template BasicDispatcher
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// Implements a logarithmic double dispatcher for functors (or functions)
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@ -137,36 +137,36 @@ namespace Loki
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typedef CallbackType MappedType;
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typedef AssocVector<KeyType, MappedType> MapType;
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MapType callbackMap_;
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void DoAdd(TypeInfo lhs, TypeInfo rhs, CallbackType fun);
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bool DoRemove(TypeInfo lhs, TypeInfo rhs);
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public:
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template <class SomeLhs, class SomeRhs>
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void Add(CallbackType fun)
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{
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DoAdd(typeid(SomeLhs), typeid(SomeRhs), fun);
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}
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template <class SomeLhs, class SomeRhs>
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bool Remove()
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{
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return DoRemove(typeid(SomeLhs), typeid(SomeRhs));
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}
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ResultType Go(BaseLhs& lhs, BaseRhs& rhs);
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};
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// Non-inline to reduce compile time overhead...
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template <class BaseLhs, class BaseRhs,
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template <class BaseLhs, class BaseRhs,
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typename ResultType, typename CallbackType>
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void BasicDispatcher<BaseLhs,BaseRhs,ResultType,CallbackType>
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::DoAdd(TypeInfo lhs, TypeInfo rhs, CallbackType fun)
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{
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callbackMap_[KeyType(lhs, rhs)] = fun;
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}
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template <class BaseLhs, class BaseRhs,
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template <class BaseLhs, class BaseRhs,
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typename ResultType, typename CallbackType>
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bool BasicDispatcher<BaseLhs,BaseRhs,ResultType,CallbackType>
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::DoRemove(TypeInfo lhs, TypeInfo rhs)
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@ -174,7 +174,7 @@ namespace Loki
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return callbackMap_.erase(KeyType(lhs, rhs)) == 1;
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}
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template <class BaseLhs, class BaseRhs,
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template <class BaseLhs, class BaseRhs,
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typename ResultType, typename CallbackType>
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ResultType BasicDispatcher<BaseLhs,BaseRhs,ResultType,CallbackType>
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::Go(BaseLhs& lhs, BaseRhs& rhs)
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@ -254,42 +254,42 @@ namespace Loki
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class DispatcherBackend = BasicDispatcher>
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class FnDispatcher
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{
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DispatcherBackend<BaseLhs, BaseRhs, ResultType,
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DispatcherBackend<BaseLhs, BaseRhs, ResultType,
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ResultType (*)(BaseLhs&, BaseRhs&)> backEnd_;
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public:
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template <class SomeLhs, class SomeRhs>
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void Add(ResultType (*pFun)(BaseLhs&, BaseRhs&))
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{
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return backEnd_.template Add<SomeLhs, SomeRhs>(pFun);
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}
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}
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template <class SomeLhs, class SomeRhs,
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ResultType (*callback)(SomeLhs&, SomeRhs&)>
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void Add()
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{
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typedef Private::FnDispatcherHelper<
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BaseLhs, BaseRhs,
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BaseLhs, BaseRhs,
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SomeLhs, SomeRhs,
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ResultType,
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CastingPolicy<SomeLhs,BaseLhs>,
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CastingPolicy<SomeRhs,BaseRhs>,
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CastingPolicy<SomeLhs,BaseLhs>,
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CastingPolicy<SomeRhs,BaseRhs>,
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callback> Local;
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Add<SomeLhs, SomeRhs>(&Local::Trampoline);
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}
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template <class SomeLhs, class SomeRhs,
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ResultType (*callback)(SomeLhs&, SomeRhs&),
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bool symmetric>
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void Add(bool = true) // [gcc] dummy bool
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{
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typedef Private::FnDispatcherHelper<
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BaseLhs, BaseRhs,
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BaseLhs, BaseRhs,
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SomeLhs, SomeRhs,
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ResultType,
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CastingPolicy<SomeLhs,BaseLhs>,
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CastingPolicy<SomeRhs,BaseRhs>,
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CastingPolicy<SomeLhs,BaseLhs>,
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CastingPolicy<SomeRhs,BaseRhs>,
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callback> Local;
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Add<SomeLhs, SomeRhs>(&Local::Trampoline);
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@ -298,7 +298,7 @@ namespace Loki
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Add<SomeRhs, SomeLhs>(&Local::TrampolineR);
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}
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}
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template <class SomeLhs, class SomeRhs>
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void Remove()
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{
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@ -323,7 +323,7 @@ namespace Loki
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typename ResultType,
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class CastLhs, class CastRhs,
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class Fun, bool SwapArgs>
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class FunctorDispatcherHelper
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class FunctorDispatcherHelper
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{
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Fun fun_;
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ResultType Fire(BaseLhs& lhs, BaseRhs& rhs,Int2Type<false>)
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@ -352,7 +352,7 @@ namespace Loki
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template <class BaseLhs, class BaseRhs = BaseLhs,
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typename ResultType = void,
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template <class, class> class CastingPolicy = DynamicCaster,
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template <class, class> class CastingPolicy = DynamicCaster,
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template <class, class, class, class>
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class DispatcherBackend = BasicDispatcher>
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class FunctorDispatcher
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@ -395,7 +395,7 @@ namespace Loki
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backEnd_.template Add<SomeRhs, SomeLhs>(FunctorType(AdapterR(fun)));
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}
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}
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template <class SomeLhs, class SomeRhs>
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void Remove()
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{
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