45 lines
871 B
C++
45 lines
871 B
C++
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#if !defined( INCLUDED_SIGNALFWD_H )
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#define INCLUDED_SIGNALFWD_H
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class SignalHandler;
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template<typename FirstArgument>
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class SignalHandler1;
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template<typename FirstArgument, typename SecondArgument>
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class SignalHandler2;
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template<typename FirstArgument, typename SecondArgument, typename ThirdArgument>
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class SignalHandler3;
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template<typename Context>
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class Opaque;
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///\brief A pointer that always has a well-defined value.
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/// If no value is specified, the appropriate null value is used.
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template<typename Type>
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class Handle
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{
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Type* p;
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public:
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Handle() : p( 0 ){
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}
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explicit Handle( Type* p ) : p( p ){
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}
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Type* get() const {
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return p;
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}
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bool isNull() const {
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return p == 0;
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}
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};
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template<typename Handler>
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class SignalFwd
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{
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public:
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typedef Handle< Opaque<Handler> > handler_id_type;
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};
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typedef SignalFwd<SignalHandler>::handler_id_type SignalHandlerId;
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#endif
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