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add 3 parameter scope guard; improve its documentation

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@56194 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2008-10-09 11:26:50 +00:00
parent d8a16cc8c9
commit bcffb4d1a9
2 changed files with 141 additions and 6 deletions
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84
include/wx/scopeguard.h
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@@ -226,6 +226,41 @@ inline wxScopeGuardImpl2<F, P1, P2> wxMakeGuard(F fun, P1 p1, P2 p2)
return wxScopeGuardImpl2<F, P1, P2>::MakeGuard(fun, p1, p2);
}
// ----------------------------------------------------------------------------
// wxScopeGuardImpl3: scope guard for actions with 3 parameters
// ----------------------------------------------------------------------------
template <class F, class P1, class P2, class P3>
class wxScopeGuardImpl3 : public wxScopeGuardImplBase
{
public:
static wxScopeGuardImpl3<F, P1, P2, P3> MakeGuard(F fun, P1 p1, P2 p2, P3 p3)
{
return wxScopeGuardImpl3<F, P1, P2, P3>(fun, p1, p2, p3);
}
~wxScopeGuardImpl3() { wxPrivateOnScopeExit(*this); }
void Execute() { m_fun(m_p1, m_p2, m_p3); }
protected:
wxScopeGuardImpl3(F fun, P1 p1, P2 p2, P3 p3)
: m_fun(fun), m_p1(p1), m_p2(p2), m_p3(p3) { }
F m_fun;
const P1 m_p1;
const P2 m_p2;
const P3 m_p3;
wxScopeGuardImpl3& operator=(const wxScopeGuardImpl3&);
};
template <class F, class P1, class P2, class P3>
inline wxScopeGuardImpl3<F, P1, P2, P3> wxMakeGuard(F fun, P1 p1, P2 p2, P3 p3)
{
return wxScopeGuardImpl3<F, P1, P2, P3>::MakeGuard(fun, p1, p2, p3);
}
// ============================================================================
// wxScopeGuards for object methods
// ============================================================================
@@ -324,6 +359,39 @@ wxMakeObjGuard(Obj& obj, MemFun memFun, P1 p1, P2 p2)
MakeObjGuard(obj, memFun, p1, p2);
}
template <class Obj, class MemFun, class P1, class P2, class P3>
class wxObjScopeGuardImpl3 : public wxScopeGuardImplBase
{
public:
static wxObjScopeGuardImpl3<Obj, MemFun, P1, P2, P3>
MakeObjGuard(Obj& obj, MemFun memFun, P1 p1, P2 p2, P3 p3)
{
return wxObjScopeGuardImpl3<Obj, MemFun, P1, P3>(obj, memFun, p1, p2, p3);
}
~wxObjScopeGuardImpl3() { wxPrivateOnScopeExit(*this); }
void Execute() { (m_obj.*m_memfun)(m_p1, m_p2, m_p3); }
protected:
wxObjScopeGuardImpl3(Obj& obj, MemFun memFun, P1 p1, P2 p2, P3 p3)
: m_obj(obj), m_memfun(memFun), m_p1(p1), m_p2(p2), m_p3(p3) { }
Obj& m_obj;
MemFun m_memfun;
const P1 m_p1;
const P2 m_p2;
const P3 m_p3;
};
template <class Obj, class MemFun, class P1, class P2, class P3>
inline wxObjScopeGuardImpl3<Obj, MemFun, P1, P2, P3>
wxMakeObjGuard(Obj& obj, MemFun memFun, P1 p1, P2 p2, P3 p3)
{
return wxObjScopeGuardImpl3<Obj, MemFun, P1, P2, P3>::
MakeObjGuard(obj, memFun, p1, p2, p3);
}
// ----------------------------------------------------------------------------
// wxVariableSetter: use the same technique as for wxScopeGuard to allow
// setting a variable to some value on block exit
@@ -465,6 +533,22 @@ wxPrivate::VariableNullerImpl<T> wxMakeVarNuller(T& var)
wxON_BLOCK_EXIT_OBJ2(*this, m, p1, p2)
#define wxON_BLOCK_EXIT3_IMPL(n, f, p1, p2, p3) \
wxScopeGuard n = wxMakeGuard(f, p1, p2, p3); \
wxPrivateUse(n)
#define wxON_BLOCK_EXIT3(f, p1, p2, p3) \
wxON_BLOCK_EXIT3_IMPL(wxGuardName, f, p1, p2, p3)
#define wxON_BLOCK_EXIT_OBJ3_IMPL(n, o, m, p1, p2, p3) \
wxScopeGuard n = wxMakeObjGuard(o, m, p1, p2, p3); \
wxPrivateUse(n)
#define wxON_BLOCK_EXIT_OBJ3(o, m, p1, p2, p3) \
wxON_BLOCK_EXIT_OBJ3_IMPL(wxGuardName, o, &m, p1, p2, p3)
#define wxON_BLOCK_EXIT_THIS3(m, p1, p2, p3) \
wxON_BLOCK_EXIT_OBJ3(*this, m, p1, p2, p3)
#define wxSetterName wxMAKE_UNIQUE_NAME(wxVarSetter)
#define wxON_BLOCK_EXIT_SET_IMPL(n, var, value) \