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Defined(Foo, #PB_Macro) ?
Posted: Wed May 11, 2011 12:10 am
by Little John
Hi all,
I wanted to check, whether a macro is defined:
Code: Select all
CompilerIf Defined(Foo, #PB_Macro)
Debug "Macro 'Foo' is already defined."
CompilerEndIf
But this does not work (tesed with PB 4.51 and PB 4.60 Beta 3).
Why is there no cnstant
#PB_Macro for this purpose?
Is there any other possibility to check, whether a particular macro is defined?
Regards, Little John
Re: Defined(Foo, #PB_Macro) ?
Posted: Wed May 11, 2011 8:47 am
by STARGÅTE
You can not test in this way because the macro (the name) will replace already during the test.
Code: Select all
Macro Foo
Debug 1
EndMacro
CompilerIf Defined(Foo, #PB_Macro)
CompilerEndIf
will be:
Code: Select all
Macro Foo
Debug 1
EndMacro
CompilerIf Defined(Debug 1, #PB_Macro)
;[...]
Re: Defined(Foo, #PB_Macro) ?
Posted: Wed May 11, 2011 8:48 am
by Fred
That's it.
Re: Defined(Foo, #PB_Macro) ?
Posted: Wed May 11, 2011 3:38 pm
by Little John
Hi, thank you for the explanation!
Maybe it is possible (and desirable) to change the compiler a little, so that it makes and exception in this case:
If a macro name is an argument of Defined(), then the compiler will not expand the macro.
Regards, Little John
Re: Defined(Foo, #PB_Macro) ?
Posted: Wed May 11, 2011 8:13 pm
by freak
You can use a separate constant to guard against the double definition of a macro. Its not perfect, but it does the job for me:
Code: Select all
CompilerIf Defined(macro_test_defined, #PB_Constant) = 0
#macro_test_defined = 1
Macro test()
; something
EndMacro
CompilerEndIf
Re: Defined(Foo, #PB_Macro) ?
Posted: Thu May 12, 2011 5:40 am
by Little John
That's a good idea, thank you!
Regards, Little John
Re: Defined(Foo, #PB_Macro) ?
Posted: Fri Jun 23, 2023 9:05 am
by jacdelad
Or the compiler could store the macro names in a map or list, so even if the are replaced it remembers they were there.
Re: Defined(Foo, #PB_Macro) ?
Posted: Fri Jun 23, 2023 11:05 am
by Fred
The whole line is evaluated before being parsed, so it wouldn't solve the issue.
Re: Defined(Foo, #PB_Macro) ?
Posted: Sat Jun 24, 2023 9:06 pm
by Olli
Solve --> A homemade IDE tool set as pre-process, feature available since long time.
That is not very complex to do. Just the homemade feature would not be native nor public...
Just a remark : what's so bad with this code below ?
Code: Select all
Macro aa()
Debug 11
EndMacro
UndefineMacro aa
Macro aa()
Debug 13
EndMacro
aa()