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Old 11-12-2009, 12:51 PM
Rogier Rogier is online now
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Join Date: 09-09-2004
Location: the Netherlands
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Script expression for macros that are not always defined?

For every action, you can set a condition "build only if macro or expression ... is true/false/defined/undefined/etc."

Now, occasionally I want to build a step if some macro (let's say "UnsureMacro") is either not defined, or if it's true.

To pull this off I've been messing with a temporary macro "DO_IT" which I first set to true (always), and then (in a separate set macro action) set it to %UnsureMacro% if UnsureMacro is defined.
Then in the actual action, I enable the condition "only if %DO_IT% is true".

This works, but it feels kinda clumsy. Is there some script expression in which I can combine this, so I don't have to mess with a temp macro and separate actions?

I tried stuff like this:
[((vbld_AllMacros()("UnsureMacro")) Is Nothing) OR ((vbld_AllMacros()("UnsureMacro"))<>"0")]
But that still results in an error if UnsureMacro is not defined.

If I write a complete script for this, I can do it, but is there perhaps a neat tight single expression that does the same?

Last edited by Rogier; 11-12-2009 at 01:13 PM.
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Old 11-12-2009, 01:31 PM
kinook kinook is online now
Join Date: 03-06-2001
Location: Colorado
Posts: 5,838
VBScript doesn't do short-circuit evaluation, so you would need to create a project or global script function (View | Other Windows | Script Editor) like this:
Function CheckMacro(name)
  CheckMacro = False
  If vbld_AllMacros()(name) Is Nothing Then
    CheckMacro = True
    CheckMacro = CBool(vbld_AllMacros()(name))
  End If
End Function
and reference this function in the rule:

build only if macro or expression
is true
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Old 11-12-2009, 01:34 PM
Rogier Rogier is online now
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Join Date: 09-09-2004
Location: the Netherlands
Posts: 40
Ok, thanks, will set things up like that.
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