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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2007 Craig Edwards <craigedwards@brainbox.cc>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef CALLER_H
#define CALLER_H
/** The templates below can be auto generated by tools/create_templates.pl.
* They are used to represent a functor with a given number of parameters and
* a specific return type. To prevent passing the wrong number of parameters
* and have the compiler detect this error at build-time, each class is numbered
* according to the number of parameters it takes, e.g. caller0, caller1, caller2.
* These have been generated from zero parameters to eight.
*
* If you want to declare a functor which takes two parameters, a User and a Channel,
* and returns bool, simply create it like this:
*
* caller2<bool, User*, Channel*> MyFunction;
*
* and initialize it correctly, when placed into a class you will be able to call it:
*
* bool n = someclass->MyFunction(someuser, somechan);
*
* These functor templates work this way so that you can simply and easily allow
* for these class methods to be overridden from within a module, e.g. have a module
* which completely replaces the code for IsNick, etc. For example, with the example
* above:
*
* MyNewFunction replaceme(ServerInstance);
*
* someclass->MyFunction = \&replaceme;
*
* After this point, calls to someclass->MyFunction will call the new code in your
* replacement functor.
*
* This is a very powerful feature which should be considered 'advanced' and not for
* beginners. If you do not understand these templates, STAY AWAY from playing with
* this until you do, as if you get this wrong, this can generate some pretty long
* winded and confusing error messages at compile time.
*/
template <typename ReturnType> class CoreExport HandlerBase0 : public classbase
{
public:
virtual ReturnType Call() = 0;
virtual ~HandlerBase0() { }
};
template <typename ReturnType, typename Param1> class CoreExport HandlerBase1 : public classbase
{
public:
virtual ReturnType Call(Param1) = 0;
virtual ~HandlerBase1() { }
};
template <typename ReturnType, typename Param1, typename Param2> class CoreExport HandlerBase2 : public classbase
{
public:
virtual ReturnType Call(Param1, Param2) = 0;
virtual ~HandlerBase2() { }
};
template <typename ReturnType, typename Param1, typename Param2, typename Param3> class CoreExport HandlerBase3 : public classbase
{
public:
virtual ReturnType Call(Param1, Param2, Param3) = 0;
virtual ~HandlerBase3() { }
};
template <typename ReturnType, typename Param1, typename Param2, typename Param3, typename Param4> class CoreExport HandlerBase4 : public classbase
{
public:
virtual ReturnType Call(Param1, Param2, Param3, Param4) = 0;
virtual ~HandlerBase4() { }
};
template <typename ReturnType, typename Param1, typename Param2, typename Param3, typename Param4, typename Param5> class CoreExport HandlerBase5 : public classbase
{
public:
virtual ReturnType Call(Param1, Param2, Param3, Param4, Param5) = 0;
virtual ~HandlerBase5() { }
};
template <typename ReturnType, typename Param1, typename Param2, typename Param3, typename Param4, typename Param5, typename Param6> class CoreExport HandlerBase6 : public classbase
{
public:
virtual ReturnType Call(Param1, Param2, Param3, Param4, Param5, Param6) = 0;
virtual ~HandlerBase6() { }
};
template <typename ReturnType, typename Param1, typename Param2, typename Param3, typename Param4, typename Param5, typename Param6, typename Param7> class CoreExport HandlerBase7 : public classbase
{
public:
virtual ReturnType Call(Param1, Param2, Param3, Param4, Param5, Param6, Param7) = 0;
virtual ~HandlerBase7() { }
};
template <typename ReturnType, typename Param1, typename Param2, typename Param3, typename Param4, typename Param5, typename Param6, typename Param7, typename Param8> class CoreExport HandlerBase8 : public classbase
{
public:
virtual ReturnType Call(Param1, Param2, Param3, Param4, Param5, Param6, Param7, Param8) = 0;
virtual ~HandlerBase8() { }
};
template <typename HandlerType> class CoreExport caller
{
public:
HandlerType* target;
caller(HandlerType* initial)
: target(initial)
{ }
virtual ~caller() { }
};
template <typename ReturnType> class CoreExport caller0 : public caller< HandlerBase0<ReturnType> >
{
public:
caller0(HandlerBase0<ReturnType>* initial)
: caller< HandlerBase0<ReturnType> >::caller(initial)
{ }
virtual ReturnType operator() ()
{
return this->target->Call();
}
};
template <typename ReturnType, typename Param1> class CoreExport caller1 : public caller< HandlerBase1<ReturnType, Param1> >
{
public:
caller1(HandlerBase1<ReturnType, Param1>* initial)
: caller< HandlerBase1<ReturnType, Param1> >(initial)
{ }
virtual ReturnType operator() (Param1 param1)
{
return this->target->Call(param1);
}
};
template <typename ReturnType, typename Param1, typename Param2> class CoreExport caller2 : public caller< HandlerBase2<ReturnType, Param1, Param2> >
{
public:
caller2(HandlerBase2<ReturnType, Param1, Param2>* initial)
: caller< HandlerBase2<ReturnType, Param1, Param2> >(initial)
{ }
virtual ReturnType operator() (Param1 param1, Param2 param2)
{
return this->target->Call(param1, param2);
}
};
template <typename ReturnType, typename Param1, typename Param2, typename Param3> class CoreExport caller3 : public caller< HandlerBase3<ReturnType, Param1, Param2, Param3> >
{
public:
caller3(HandlerBase3<ReturnType, Param1, Param2, Param3>* initial)
: caller< HandlerBase3<ReturnType, Param1, Param2, Param3> >(initial)
{ }
virtual ReturnType operator() (Param1 param1, Param2 param2, Param3 param3)
{
return this->target->Call(param1, param2, param3);
}
};
template <typename ReturnType, typename Param1, typename Param2, typename Param3, typename Param4> class CoreExport caller4 : public caller< HandlerBase4<ReturnType, Param1, Param2, Param3, Param4> >
{
public:
caller4(HandlerBase4<ReturnType, Param1, Param2, Param3, Param4>* initial)
: caller< HandlerBase4<ReturnType, Param1, Param2, Param3, Param4> >(initial)
{ }
virtual ReturnType operator() (Param1 param1, Param2 param2, Param3 param3, Param4 param4)
{
return this->target->Call(param1, param2, param3, param4);
}
};
template <typename ReturnType, typename Param1, typename Param2, typename Param3, typename Param4, typename Param5> class CoreExport caller5 : public caller< HandlerBase5<ReturnType, Param1, Param2, Param3, Param4, Param5> >
{
public:
caller5(HandlerBase5<ReturnType, Param1, Param2, Param3, Param4, Param5>* initial)
: caller< HandlerBase5<ReturnType, Param1, Param2, Param3, Param4, Param5> >(initial)
{ }
virtual ReturnType operator() (Param1 param1, Param2 param2, Param3 param3, Param4 param4, Param5 param5)
{
return this->target->Call(param1, param2, param3, param4, param5);
}
};
template <typename ReturnType, typename Param1, typename Param2, typename Param3, typename Param4, typename Param5, typename Param6> class CoreExport caller6 : public caller< HandlerBase6<ReturnType, Param1, Param2, Param3, Param4, Param5, Param6> >
{
public:
caller6(HandlerBase6<ReturnType, Param1, Param2, Param3, Param4, Param5, Param6>* initial)
: caller< HandlerBase6<ReturnType, Param1, Param2, Param3, Param4, Param5, Param6> >(initial)
{ }
virtual ReturnType operator() (Param1 param1, Param2 param2, Param3 param3, Param4 param4, Param5 param5, Param6 param6)
{
return this->target->Call(param1, param2, param3, param4, param5, param6);
}
};
template <typename ReturnType, typename Param1, typename Param2, typename Param3, typename Param4, typename Param5, typename Param6, typename Param7> class CoreExport caller7 : public caller< HandlerBase7<ReturnType, Param1, Param2, Param3, Param4, Param5, Param6, Param7> >
{
public:
caller7(HandlerBase7<ReturnType, Param1, Param2, Param3, Param4, Param5, Param6, Param7>* initial)
: caller< HandlerBase7<ReturnType, Param1, Param2, Param3, Param4, Param5, Param6, Param7> >(initial)
{ }
virtual ReturnType operator() (Param1 param1, Param2 param2, Param3 param3, Param4 param4, Param5 param5, Param6 param6, Param7 param7)
{
return this->target->Call(param1, param2, param3, param4, param5, param6, param7);
}
};
template <typename ReturnType, typename Param1, typename Param2, typename Param3, typename Param4, typename Param5, typename Param6, typename Param7, typename Param8> class CoreExport caller8 : public caller< HandlerBase8<ReturnType, Param1, Param2, Param3, Param4, Param5, Param6, Param7, Param8> >
{
public:
caller8(HandlerBase8<ReturnType, Param1, Param2, Param3, Param4, Param5, Param6, Param7, Param8>* initial)
: caller< HandlerBase8<ReturnType, Param1, Param2, Param3, Param4, Param5, Param6, Param7, Param8> >(initial)
{ }
virtual ReturnType operator() (Param1 param1, Param2 param2, Param3 param3, Param4 param4, Param5 param5, Param6 param6, Param7 param7, Param8 param8)
{
return this->target->Call(param1, param2, param3, param4, param5, param6, param7, param8);
}
};
/** These shorthand macros are used to define a functor class which only implements Call(). Most functors are like this.
* If you want something more complex, define them by hand.
*
* The first parameter to each macro is the class name to define, the second parameter is the return value of Call().
* The following parameters are the parameter types for Call(), and again, the macro is numbered to match the number of
* parameters, to prevent mistakes.
*/
#define DEFINE_HANDLER0(NAME, RETURN) \
class CoreExport NAME : public HandlerBase0<RETURN> { public: NAME() { } virtual ~NAME() { } virtual RETURN Call(); }
#define DEFINE_HANDLER1(NAME, RETURN, V1) \
class CoreExport NAME : public HandlerBase1<RETURN, V1> { public: NAME() { } virtual ~NAME() { } virtual RETURN Call(V1); }
#define DEFINE_HANDLER2(NAME, RETURN, V1, V2) \
class CoreExport NAME : public HandlerBase2<RETURN, V1, V2> { public: NAME() { } virtual ~NAME() { } virtual RETURN Call(V1, V2); }
#define DEFINE_HANDLER3(NAME, RETURN, V1, V2, V3) \
class CoreExport NAME : public HandlerBase3<RETURN, V1, V2, V3> { public: NAME() { } virtual ~NAME() { } virtual RETURN Call(V1, V2, V3); }
#define DEFINE_HANDLER4(NAME, RETURN, V1, V2, V3, V4) \
class CoreExport NAME : public HandlerBase4<RETURN, V1, V2, V3, V4> { public: NAME() { } virtual ~NAME() { } virtual RETURN Call(V1, V2, V3, V4); }
#define DEFINE_HANDLER5(NAME, RETURN, V1, V2, V3, V4, V5) \
class CoreExport NAME : public HandlerBase5<RETURN, V1, V2, V3, V4, V5> { public: NAME() { } virtual ~NAME() { } virtual RETURN Call(V1, V2, V3, V4, V5); }
#define DEFINE_HANDLER6(NAME, RETURN, V1, V2, V3, V4, V5, V6) \
class CoreExport NAME : public HandlerBase6<RETURN, V1, V2, V3, V4, V5, V6> { public: NAME() { } virtual ~NAME() { } virtual RETURN Call(V1, V2, V3, V4, V5, V6); }
#define DEFINE_HANDLER7(NAME, RETURN, V1, V2, V3, V4, V5, V6, V7) \
class CoreExport NAME : public HandlerBase7<RETURN, V1, V2, V3, V4, V5, V6, V7> { public: NAME() { } virtual ~NAME() { } virtual RETURN Call(V1, V2, V3, V4, V5, V6, V7); }
#define DEFINE_HANDLER8(NAME, RETURN, V1, V2, V3, V4, V5, V6, V7, V8) \
class CoreExport NAME : public HandlerBase8<RETURN, V1, V2, V3, V4, V5, V6, V7, V8> { public: NAME() { } virtual ~NAME() { } virtual RETURN Call(V1, V2, V3, V4, V5, V6, V7, V8); }
#endif
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