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The goto-less goto!

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25 Jan 2011CPOL 41.8K   4   33
Alternative 2 can be enhanced by returning a booleen value if we want to code something similar to the original example. A (early) return value of false would indicate a failure which could then be handle by checking the function result.if (!DoAllActions()){ ...
Alternative 2 can be enhanced by returning a booleen value if we want to code something similar to the original example. A (early) return value of false would indicate a failure which could then be handle by checking the function result.

if (!DoAllActions())
{
   DoFailedCleanup();
}

bool DoAllActions()
{
   if (condition1_fails)
      return false;
   if (condition2_fails)
      return false;
   ...
   if(!conditionN_fails)
      retrun false;
   PerformActionOnAllSuccess();
   DoNormalCleanup();
   return true;
}


Alternatively, if each action are independant, a variation like this might be more appropriate:
if (DoAction1() && 
    DoAction2() && 
    ... && 
    DoActionN())
{
   PerformActionOnAllSuccess();
   DoNormalCleanup();
}
else 
{
   DoFailedCleanup();
}

bool DoAction1()
{
   bool condition1_fails = ...;
   return !condition1_fails;
}
...

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Software Developer (Senior)
Canada Canada
Programmer at Maid LABS from 2003 (www.maidlabs.com)

Programmer-Analyst at Viasat Geo Technoligies from 1995 to 2002 (www.viasat-geo.com).

I have studied at École Polytechnique de Montréal in computer engineering.

Comments and Discussions

 
GeneralRe: Reason for my vote of 1People who put more than one return ... Pin
pasztorpisti9-Oct-13 23:17
pasztorpisti9-Oct-13 23:17 
GeneralRe: Reason for my vote of 1People who put more than one return ... Pin
Wolfgang_Baron10-Oct-13 2:40
professionalWolfgang_Baron10-Oct-13 2:40 
GeneralRe: Reason for my vote of 1People who put more than one return ... Pin
pasztorpisti10-Oct-13 3:21
pasztorpisti10-Oct-13 3:21 
GeneralRe: Reason for my vote of 1People who put more than one return ... Pin
pasztorpisti7-Oct-13 22:56
pasztorpisti7-Oct-13 22:56 
GeneralRe: Reason for my vote of 1People who put more than one return ... Pin
Wolfgang_Baron9-Oct-13 14:09
professionalWolfgang_Baron9-Oct-13 14:09 
GeneralRe: Reason for my vote of 1People who put more than one return ... Pin
pasztorpisti9-Oct-13 22:38
pasztorpisti9-Oct-13 22:38 
GeneralReason for my vote of 5 The first alternate is the most read... Pin
NicolasG1-Feb-11 8:21
NicolasG1-Feb-11 8:21 
GeneralReason for my vote of 5 IMHO the superior technique. I don't... Pin
dmjm-h31-Jan-11 7:31
dmjm-h31-Jan-11 7:31 

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