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add CTClosure for a closure that takes one argument at call time

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git-svn-id: svn://localhost/ardour2/branches/3.0@6351 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Paul Davis 2009-12-11 19:22:59 +00:00
parent 9fa8a7e9c2
commit 70b75d656e
1 changed files with 41 additions and 1 deletions
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42
libs/pbd/pbd/closure.h
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@ -86,7 +86,7 @@ struct Closure {
/* will crash if impl is unset */
void operator() () const { (*impl)(); }
private:
protected:
ClosureBaseImpl* impl;
};
@ -154,6 +154,46 @@ Closure closure (T& t, void (T::*m)(A1,A2), A1 a1, A2 a2) { return Closure (new
template<typename T, typename A1, typename A2, typename A3>
Closure closure (T& t, void (T::*m)(A1, A2, A3), A1 a1, A2 a2, A3 a3) { return Closure (new ClosureImpl3<T,A1,A2,A3>(t,m , a1, a2, a3)); }
/*---------*/
template<typename A>
struct CTClosureBaseImpl : ClosureBaseImpl {
CTClosureBaseImpl() {}
virtual void operator() () { operator() (A()); }
virtual void operator() (A arg) = 0;
protected:
virtual ~CTClosureBaseImpl() { }
};
template<typename A>
struct CTClosure : public Closure {
CTClosure() {}
CTClosure (CTClosureBaseImpl<A>* i) : Closure (i) {}
CTClosure (const CTClosure& other) : Closure (other) {}
/* will crash if impl is unset */
void operator() (A arg) const { (*(dynamic_cast<CTClosureBaseImpl<A>*> (impl))) (arg); }
};
template<typename T, typename A>
struct CTClosureImpl1 : public CTClosureBaseImpl<A>
{
CTClosureImpl1 (T& obj, void (T::*m)(A))
: object (obj), method (m) {}
void operator() (A call_time_arg) { (object.*method) (call_time_arg); }
private:
T& object;
void (T::*method)(A);
};
/* functor wraps a method that takes 1 arg provided at call-time */
template<typename T, typename A>
CTClosure<A> closure (T& t, void (T::*m)(A)) { return CTClosure<A> (new CTClosureImpl1<T,A>(t,m)); }
}
#endif /* __pbd_closure_h__ */