last_error_scope Class Reference
[Error Library]

#include <winstl/error/last_error_scope.hpp>

List of all members.

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Detailed Description

A scoping class that scopes the thread's last error.

  DWORD   err = ::GetLastError();
  { winstl::last_error_scope  scope; // Scope the error while we change it

    // Some code that changes (or may change) the last error
    . . .

    ::SetLastError(ERROR_ACCESS_DENIED); // ... we just do this for pedagogical purposes

  } // End of scope - error value replaced to former value

  assert(::GetLastError() == err);

Public Types
Types
typedef last_error_scope	class_type
Public Member Functions
Operations
	last_error_scope () throw ()
	Takes a copy of the current thread error, which will be reset on destruction of this instance.
	last_error_scope (ws_dword_t dwErr) throw ()
	Takes a copy of the current thread error, which will be reset on destruction of this instance.
	~last_error_scope () throw ()
	Resets the thread error value current at the epoque of construction of this instance.
Operations
	operator ws_dword_t () const
	Returns the value of the recorded thread error, which will be reset on destruction of this instance.

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Constructor & Destructor Documentation

last_error_scope

(

)

throw () [inline]

Takes a copy of the current thread error, which will be reset on destruction of this instance.

last_error_scope

(

ws_dword_t

dwErr

)

throw () [inline, explicit]

Takes a copy of the current thread error, which will be reset on destruction of this instance.

The current thread error is set to the given value.

Parameters:

dwErr

The value to which the current thread error is set

~last_error_scope

(

)

throw () [inline]

Resets the thread error value current at the epoque of construction of this instance.

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Member Function Documentation

operator ws_dword_t

(

)

const [inline]

Returns the value of the recorded thread error, which will be reset on destruction of this instance.

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The documentation for this class was generated from the following file:

• winstl/error/last_error_scope.hpp