554 lines
16 KiB
C++
554 lines
16 KiB
C++
///////////////////////////////////////////////////////////////////////////////
|
|
// Name: wx/scopeguard.h
|
|
// Purpose: declares wxwxScopeGuard and related macros
|
|
// Author: Vadim Zeitlin
|
|
// Modified by:
|
|
// Created: 03.07.2003
|
|
// RCS-ID: $Id: scopeguard.h 63473 2010-02-12 22:47:21Z VZ $
|
|
// Copyright: (c) 2003 Vadim Zeitlin <vadim@wxwidgets.org>
|
|
// Licence: wxWindows licence
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
/*
|
|
Acknowledgements: this header is heavily based on (well, almost the exact
|
|
copy of) ScopeGuard.h by Andrei Alexandrescu and Petru Marginean published
|
|
in December 2000 issue of C/C++ Users Journal.
|
|
http://www.cuj.com/documents/cujcexp1812alexandr/
|
|
*/
|
|
|
|
#ifndef _WX_SCOPEGUARD_H_
|
|
#define _WX_SCOPEGUARD_H_
|
|
|
|
#include "wx/defs.h"
|
|
|
|
#include "wx/except.h"
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// helpers
|
|
// ----------------------------------------------------------------------------
|
|
|
|
#ifdef __WATCOMC__
|
|
|
|
// WATCOM-FIXME: C++ of Open Watcom 1.3 doesn't like OnScopeExit() created
|
|
// through template so it must be workarounded with dedicated inlined macro.
|
|
// For compatibility with Watcom compilers wxPrivate::OnScopeExit must be
|
|
// replaced with wxPrivateOnScopeExit but in user code (for everyone who
|
|
// doesn't care about OW compatibility) wxPrivate::OnScopeExit still works.
|
|
|
|
#define wxPrivateOnScopeExit(guard) \
|
|
{ \
|
|
if ( !(guard).WasDismissed() ) \
|
|
{ \
|
|
wxTRY \
|
|
{ \
|
|
(guard).Execute(); \
|
|
} \
|
|
wxCATCH_ALL(;) \
|
|
} \
|
|
}
|
|
|
|
#define wxPrivateUse(n) wxUnusedVar(n)
|
|
|
|
#else
|
|
|
|
namespace wxPrivate
|
|
{
|
|
// in the original implementation this was a member template function of
|
|
// ScopeGuardImplBase but gcc 2.8 which is still used for OS/2 doesn't
|
|
// support member templates and so we must make it global
|
|
template <class ScopeGuardImpl>
|
|
void OnScopeExit(ScopeGuardImpl& guard)
|
|
{
|
|
if ( !guard.WasDismissed() )
|
|
{
|
|
// we're called from ScopeGuardImpl dtor and so we must not throw
|
|
wxTRY
|
|
{
|
|
guard.Execute();
|
|
}
|
|
wxCATCH_ALL(;) // do nothing, just eat the exception
|
|
}
|
|
}
|
|
|
|
// just to avoid the warning about unused variables
|
|
template <class T>
|
|
void Use(const T& WXUNUSED(t))
|
|
{
|
|
}
|
|
} // namespace wxPrivate
|
|
|
|
#define wxPrivateOnScopeExit(n) wxPrivate::OnScopeExit(n)
|
|
#define wxPrivateUse(n) wxPrivate::Use(n)
|
|
|
|
#endif
|
|
|
|
// ============================================================================
|
|
// wxScopeGuard for functions and functors
|
|
// ============================================================================
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// wxScopeGuardImplBase: used by wxScopeGuardImpl[0..N] below
|
|
// ----------------------------------------------------------------------------
|
|
|
|
class wxScopeGuardImplBase
|
|
{
|
|
public:
|
|
wxScopeGuardImplBase() : m_wasDismissed(false) { }
|
|
|
|
wxScopeGuardImplBase(const wxScopeGuardImplBase& other)
|
|
: m_wasDismissed(other.m_wasDismissed)
|
|
{
|
|
other.Dismiss();
|
|
}
|
|
|
|
void Dismiss() const { m_wasDismissed = true; }
|
|
|
|
// for OnScopeExit() only (we can't make it friend, unfortunately)!
|
|
bool WasDismissed() const { return m_wasDismissed; }
|
|
|
|
protected:
|
|
~wxScopeGuardImplBase() { }
|
|
|
|
// must be mutable for copy ctor to work
|
|
mutable bool m_wasDismissed;
|
|
|
|
private:
|
|
wxScopeGuardImplBase& operator=(const wxScopeGuardImplBase&);
|
|
};
|
|
|
|
// wxScopeGuard is just a reference, see the explanation in CUJ article
|
|
typedef const wxScopeGuardImplBase& wxScopeGuard;
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// wxScopeGuardImpl0: scope guard for actions without parameters
|
|
// ----------------------------------------------------------------------------
|
|
|
|
template <class F>
|
|
class wxScopeGuardImpl0 : public wxScopeGuardImplBase
|
|
{
|
|
public:
|
|
static wxScopeGuardImpl0<F> MakeGuard(F fun)
|
|
{
|
|
return wxScopeGuardImpl0<F>(fun);
|
|
}
|
|
|
|
~wxScopeGuardImpl0() { wxPrivateOnScopeExit(*this); }
|
|
|
|
void Execute() { m_fun(); }
|
|
|
|
protected:
|
|
wxScopeGuardImpl0(F fun) : m_fun(fun) { }
|
|
|
|
F m_fun;
|
|
|
|
wxScopeGuardImpl0& operator=(const wxScopeGuardImpl0&);
|
|
};
|
|
|
|
template <class F>
|
|
inline wxScopeGuardImpl0<F> wxMakeGuard(F fun)
|
|
{
|
|
return wxScopeGuardImpl0<F>::MakeGuard(fun);
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// wxScopeGuardImpl1: scope guard for actions with 1 parameter
|
|
// ----------------------------------------------------------------------------
|
|
|
|
template <class F, class P1>
|
|
class wxScopeGuardImpl1 : public wxScopeGuardImplBase
|
|
{
|
|
public:
|
|
static wxScopeGuardImpl1<F, P1> MakeGuard(F fun, P1 p1)
|
|
{
|
|
return wxScopeGuardImpl1<F, P1>(fun, p1);
|
|
}
|
|
|
|
~wxScopeGuardImpl1() { wxPrivateOnScopeExit(* this); }
|
|
|
|
void Execute() { m_fun(m_p1); }
|
|
|
|
protected:
|
|
wxScopeGuardImpl1(F fun, P1 p1) : m_fun(fun), m_p1(p1) { }
|
|
|
|
F m_fun;
|
|
const P1 m_p1;
|
|
|
|
wxScopeGuardImpl1& operator=(const wxScopeGuardImpl1&);
|
|
};
|
|
|
|
template <class F, class P1>
|
|
inline wxScopeGuardImpl1<F, P1> wxMakeGuard(F fun, P1 p1)
|
|
{
|
|
return wxScopeGuardImpl1<F, P1>::MakeGuard(fun, p1);
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// wxScopeGuardImpl2: scope guard for actions with 2 parameters
|
|
// ----------------------------------------------------------------------------
|
|
|
|
template <class F, class P1, class P2>
|
|
class wxScopeGuardImpl2 : public wxScopeGuardImplBase
|
|
{
|
|
public:
|
|
static wxScopeGuardImpl2<F, P1, P2> MakeGuard(F fun, P1 p1, P2 p2)
|
|
{
|
|
return wxScopeGuardImpl2<F, P1, P2>(fun, p1, p2);
|
|
}
|
|
|
|
~wxScopeGuardImpl2() { wxPrivateOnScopeExit(*this); }
|
|
|
|
void Execute() { m_fun(m_p1, m_p2); }
|
|
|
|
protected:
|
|
wxScopeGuardImpl2(F fun, P1 p1, P2 p2) : m_fun(fun), m_p1(p1), m_p2(p2) { }
|
|
|
|
F m_fun;
|
|
const P1 m_p1;
|
|
const P2 m_p2;
|
|
|
|
wxScopeGuardImpl2& operator=(const wxScopeGuardImpl2&);
|
|
};
|
|
|
|
template <class F, class P1, class P2>
|
|
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
|
|
// ============================================================================
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// wxObjScopeGuardImpl0
|
|
// ----------------------------------------------------------------------------
|
|
|
|
template <class Obj, class MemFun>
|
|
class wxObjScopeGuardImpl0 : public wxScopeGuardImplBase
|
|
{
|
|
public:
|
|
static wxObjScopeGuardImpl0<Obj, MemFun>
|
|
MakeObjGuard(Obj& obj, MemFun memFun)
|
|
{
|
|
return wxObjScopeGuardImpl0<Obj, MemFun>(obj, memFun);
|
|
}
|
|
|
|
~wxObjScopeGuardImpl0() { wxPrivateOnScopeExit(*this); }
|
|
|
|
void Execute() { (m_obj.*m_memfun)(); }
|
|
|
|
protected:
|
|
wxObjScopeGuardImpl0(Obj& obj, MemFun memFun)
|
|
: m_obj(obj), m_memfun(memFun) { }
|
|
|
|
Obj& m_obj;
|
|
MemFun m_memfun;
|
|
};
|
|
|
|
template <class Obj, class MemFun>
|
|
inline wxObjScopeGuardImpl0<Obj, MemFun> wxMakeObjGuard(Obj& obj, MemFun memFun)
|
|
{
|
|
return wxObjScopeGuardImpl0<Obj, MemFun>::MakeObjGuard(obj, memFun);
|
|
}
|
|
|
|
template <class Obj, class MemFun, class P1>
|
|
class wxObjScopeGuardImpl1 : public wxScopeGuardImplBase
|
|
{
|
|
public:
|
|
static wxObjScopeGuardImpl1<Obj, MemFun, P1>
|
|
MakeObjGuard(Obj& obj, MemFun memFun, P1 p1)
|
|
{
|
|
return wxObjScopeGuardImpl1<Obj, MemFun, P1>(obj, memFun, p1);
|
|
}
|
|
|
|
~wxObjScopeGuardImpl1() { wxPrivateOnScopeExit(*this); }
|
|
|
|
void Execute() { (m_obj.*m_memfun)(m_p1); }
|
|
|
|
protected:
|
|
wxObjScopeGuardImpl1(Obj& obj, MemFun memFun, P1 p1)
|
|
: m_obj(obj), m_memfun(memFun), m_p1(p1) { }
|
|
|
|
Obj& m_obj;
|
|
MemFun m_memfun;
|
|
const P1 m_p1;
|
|
};
|
|
|
|
template <class Obj, class MemFun, class P1>
|
|
inline wxObjScopeGuardImpl1<Obj, MemFun, P1>
|
|
wxMakeObjGuard(Obj& obj, MemFun memFun, P1 p1)
|
|
{
|
|
return wxObjScopeGuardImpl1<Obj, MemFun, P1>::MakeObjGuard(obj, memFun, p1);
|
|
}
|
|
|
|
template <class Obj, class MemFun, class P1, class P2>
|
|
class wxObjScopeGuardImpl2 : public wxScopeGuardImplBase
|
|
{
|
|
public:
|
|
static wxObjScopeGuardImpl2<Obj, MemFun, P1, P2>
|
|
MakeObjGuard(Obj& obj, MemFun memFun, P1 p1, P2 p2)
|
|
{
|
|
return wxObjScopeGuardImpl2<Obj, MemFun, P1, P2>(obj, memFun, p1, p2);
|
|
}
|
|
|
|
~wxObjScopeGuardImpl2() { wxPrivateOnScopeExit(*this); }
|
|
|
|
void Execute() { (m_obj.*m_memfun)(m_p1, m_p2); }
|
|
|
|
protected:
|
|
wxObjScopeGuardImpl2(Obj& obj, MemFun memFun, P1 p1, P2 p2)
|
|
: m_obj(obj), m_memfun(memFun), m_p1(p1), m_p2(p2) { }
|
|
|
|
Obj& m_obj;
|
|
MemFun m_memfun;
|
|
const P1 m_p1;
|
|
const P2 m_p2;
|
|
};
|
|
|
|
template <class Obj, class MemFun, class P1, class P2>
|
|
inline wxObjScopeGuardImpl2<Obj, MemFun, P1, P2>
|
|
wxMakeObjGuard(Obj& obj, MemFun memFun, P1 p1, P2 p2)
|
|
{
|
|
return wxObjScopeGuardImpl2<Obj, MemFun, P1, 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, P2, 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
|
|
// ----------------------------------------------------------------------------
|
|
|
|
namespace wxPrivate
|
|
{
|
|
|
|
// empty class just to be able to define a reference to it
|
|
class VariableSetterBase { };
|
|
|
|
typedef const VariableSetterBase& VariableSetter;
|
|
|
|
template <typename T, typename U>
|
|
class VariableSetterImpl : public VariableSetterBase
|
|
{
|
|
public:
|
|
VariableSetterImpl(T& var, U value)
|
|
: m_var(var),
|
|
m_value(value)
|
|
{
|
|
}
|
|
|
|
~VariableSetterImpl()
|
|
{
|
|
m_var = m_value;
|
|
}
|
|
|
|
private:
|
|
T& m_var;
|
|
const U m_value;
|
|
|
|
// suppress the warning about assignment operator not being generated
|
|
VariableSetterImpl<T, U>& operator=(const VariableSetterImpl<T, U>&);
|
|
};
|
|
|
|
template <typename T>
|
|
class VariableNullerImpl : public VariableSetterBase
|
|
{
|
|
public:
|
|
VariableNullerImpl(T& var)
|
|
: m_var(var)
|
|
{
|
|
}
|
|
|
|
~VariableNullerImpl()
|
|
{
|
|
m_var = NULL;
|
|
}
|
|
|
|
private:
|
|
T& m_var;
|
|
|
|
VariableNullerImpl<T>& operator=(const VariableNullerImpl<T>&);
|
|
};
|
|
|
|
} // namespace wxPrivate
|
|
|
|
template <typename T, typename U>
|
|
inline
|
|
wxPrivate::VariableSetterImpl<T, U> wxMakeVarSetter(T& var, U value)
|
|
{
|
|
return wxPrivate::VariableSetterImpl<T, U>(var, value);
|
|
}
|
|
|
|
// calling wxMakeVarSetter(ptr, NULL) doesn't work because U is deduced to be
|
|
// "int" and subsequent assignment of "U" to "T *" fails, so provide a special
|
|
// function for this special case
|
|
template <typename T>
|
|
inline
|
|
wxPrivate::VariableNullerImpl<T> wxMakeVarNuller(T& var)
|
|
{
|
|
return wxPrivate::VariableNullerImpl<T>(var);
|
|
}
|
|
|
|
// ============================================================================
|
|
// macros for declaring unnamed scoped guards (which can't be dismissed)
|
|
// ============================================================================
|
|
|
|
// NB: the original code has a single (and much nicer) ON_BLOCK_EXIT macro
|
|
// but this results in compiler warnings about unused variables and I
|
|
// didn't find a way to work around this other than by having different
|
|
// macros with different names or using a less natural syntax for passing
|
|
// the arguments (e.g. as Boost preprocessor sequences, which would mean
|
|
// having to write wxON_BLOCK_EXIT(fwrite, (buf)(size)(n)(fp)) instead of
|
|
// wxON_BLOCK_EXIT4(fwrite, buf, size, n, fp)).
|
|
|
|
#define wxGuardName wxMAKE_UNIQUE_NAME(wxScopeGuard)
|
|
|
|
#define wxON_BLOCK_EXIT0_IMPL(n, f) \
|
|
wxScopeGuard n = wxMakeGuard(f); \
|
|
wxPrivateUse(n)
|
|
#define wxON_BLOCK_EXIT0(f) \
|
|
wxON_BLOCK_EXIT0_IMPL(wxGuardName, f)
|
|
|
|
#define wxON_BLOCK_EXIT_OBJ0_IMPL(n, o, m) \
|
|
wxScopeGuard n = wxMakeObjGuard(o, m); \
|
|
wxPrivateUse(n)
|
|
#define wxON_BLOCK_EXIT_OBJ0(o, m) \
|
|
wxON_BLOCK_EXIT_OBJ0_IMPL(wxGuardName, o, &m)
|
|
|
|
#define wxON_BLOCK_EXIT_THIS0(m) \
|
|
wxON_BLOCK_EXIT_OBJ0(*this, m)
|
|
|
|
|
|
#define wxON_BLOCK_EXIT1_IMPL(n, f, p1) \
|
|
wxScopeGuard n = wxMakeGuard(f, p1); \
|
|
wxPrivateUse(n)
|
|
#define wxON_BLOCK_EXIT1(f, p1) \
|
|
wxON_BLOCK_EXIT1_IMPL(wxGuardName, f, p1)
|
|
|
|
#define wxON_BLOCK_EXIT_OBJ1_IMPL(n, o, m, p1) \
|
|
wxScopeGuard n = wxMakeObjGuard(o, m, p1); \
|
|
wxPrivateUse(n)
|
|
#define wxON_BLOCK_EXIT_OBJ1(o, m, p1) \
|
|
wxON_BLOCK_EXIT_OBJ1_IMPL(wxGuardName, o, &m, p1)
|
|
|
|
#define wxON_BLOCK_EXIT_THIS1(m, p1) \
|
|
wxON_BLOCK_EXIT_OBJ1(*this, m, p1)
|
|
|
|
|
|
#define wxON_BLOCK_EXIT2_IMPL(n, f, p1, p2) \
|
|
wxScopeGuard n = wxMakeGuard(f, p1, p2); \
|
|
wxPrivateUse(n)
|
|
#define wxON_BLOCK_EXIT2(f, p1, p2) \
|
|
wxON_BLOCK_EXIT2_IMPL(wxGuardName, f, p1, p2)
|
|
|
|
#define wxON_BLOCK_EXIT_OBJ2_IMPL(n, o, m, p1, p2) \
|
|
wxScopeGuard n = wxMakeObjGuard(o, m, p1, p2); \
|
|
wxPrivateUse(n)
|
|
#define wxON_BLOCK_EXIT_OBJ2(o, m, p1, p2) \
|
|
wxON_BLOCK_EXIT_OBJ2_IMPL(wxGuardName, o, &m, p1, p2)
|
|
|
|
#define wxON_BLOCK_EXIT_THIS2(m, p1, p2) \
|
|
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) \
|
|
wxPrivate::VariableSetter n = wxMakeVarSetter(var, value); \
|
|
wxPrivateUse(n)
|
|
|
|
#define wxON_BLOCK_EXIT_SET(var, value) \
|
|
wxON_BLOCK_EXIT_SET_IMPL(wxSetterName, var, value)
|
|
|
|
#define wxON_BLOCK_EXIT_NULL_IMPL(n, var) \
|
|
wxPrivate::VariableSetter n = wxMakeVarNuller(var); \
|
|
wxPrivateUse(n)
|
|
|
|
#define wxON_BLOCK_EXIT_NULL(ptr) \
|
|
wxON_BLOCK_EXIT_NULL_IMPL(wxSetterName, ptr)
|
|
|
|
#endif // _WX_SCOPEGUARD_H_
|