1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/epoc32/include/emisc.h	Wed Mar 31 12:33:34 2010 +0100
     1.3 @@ -0,0 +1,59 @@
     1.4 +// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.5 +// All rights reserved.
     1.6 +// This component and the accompanying materials are made available
     1.7 +// under the terms of "Eclipse Public License v1.0"
     1.8 +// which accompanies this distribution, and is available
     1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.10 +//
    1.11 +// Initial Contributors:
    1.12 +// Nokia Corporation - initial contribution.
    1.13 +//
    1.14 +// Contributors:
    1.15 +//
    1.16 +// Description:
    1.17 +//
    1.18 +
    1.19 +#ifndef EMISC_H
    1.20 +#define EMISC_H
    1.21 +
    1.22 +#include <e32base.h>
    1.23 +
    1.24 +/**
    1.25 +	@file
    1.26 +
    1.27 +	Miscellaneous utilities that can help make code more readable.
    1.28 +*/
    1.29 +
    1.30 +/**
    1.31 +   A convenience postfix macro that is equivalent to wrapping the
    1.32 +   preceding expression with User::LeaveIfError().
    1.33 +
    1.34 +   The code:
    1.35 +   @code
    1.36 +   fs.Connect() OR_LEAVE;
    1.37 +   @endcode
    1.38 +
    1.39 +   is equivalent to:
    1.40 +
    1.41 +   @code
    1.42 +   User::LeaveIfError(fs.Connect());
    1.43 +   @endcode
    1.44 +
    1.45 +   The implementation happens to rely on overloading operator|| for
    1.46 +   TLeave. However, this macro is not intended for use within general
    1.47 +   expressions, just to guard individual calls to methods that may
    1.48 +   return an error code.
    1.49 + */
    1.50 +#define OR_LEAVE || ELeave
    1.51 +
    1.52 +/**
    1.53 +   Enabling overload for OR_LEAVE. Should only be invoked via
    1.54 +   OR_LEAVE, never directly.
    1.55 + */
    1.56 +inline void operator||(TInt aStatus, TLeave /*aTag*/)
    1.57 +	{
    1.58 +	User::LeaveIfError(aStatus);
    1.59 +	}
    1.60 +
    1.61 +#endif // !EMISC_H
    1.62 +