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Try - finally alternative

, 5 Jun 2011 CPOL
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There are times when "try"-related wrappers can be useful. For example, a Try() wrapper DLL written in a language other than C# could pass an Exception parameter to the Finally clause indicating whether the Try clause succeeded. For example:Try (() => {DoSomething();}, (Exception inner_ex)...
There are times when "try"-related wrappers can be useful. For example, a Try() wrapper DLL written in a language other than C# could pass an Exception parameter to the Finally clause indicating whether the Try clause succeeded. For example:
Try (() => {DoSomething();}, (Exception inner_ex) =>
{
    try
    {
      DoCleanup();
    }
    catch Exception ex
    {
      throw new CleanupException(outer_ex, ex);
    }
}
Note that an exception that occurs during cleanup will be made available up the calling stack, but the calling code will also be able to access the exception (if any) which prompted the cleanup in the first place.

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supercat9
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Embedded systems programmer since 1994.

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