jens@0: //
jens@0: //  With.m
jens@0: //  MYUtilities
jens@0: //
jens@0: //  Copyright 2008 Jens Alfke. All rights reserved.
jens@0: //
jens@0: 
jens@0: #import "With.h"
jens@0: #import "Logging.h"
jens@0: 
jens@0: 
jens@0: @interface NSObject (With)
jens@0: - (BOOL) endWith: (NSException*)x;
jens@0: @end
jens@0: 
jens@0: 
jens@0: void _catchWith( id with, NSException *x )
jens@0: {
jens@0:     Warn(@"Exception thrown from WITH(%@) block: %@",[with class],x);
jens@0:     if( [with respondsToSelector: @selector(endWith:)] ) {
jens@0:         if( ! [with endWith: x] )
jens@0:             @throw x;                           // propagate the exception if -endWith: returns NO
jens@0:     } else {
jens@0:         [with endWith];
jens@0:     }
jens@0: }
jens@0: 
jens@0: 
jens@0: 
jens@0: @implementation NSAutoreleasePool (With)
jens@0: + (NSAutoreleasePool*) beginWith    {return [self new];}
jens@0: - (void) endWith                    {[self drain];}
jens@0: - (BOOL) endWith: (NSException*)x   {[self drain]; return YES;}
jens@0: @end