Backward incompatibility?

[Gösta H. Lovgren-2]

Compiles In PBWin 8 but Not In PBWin 9
Error 543 - Must be outside Sub/Function

'

#Compile Exe  
#Include "WIN32API.INC"
Sub test_Include 
    %Top = %MB_TASKMODAL 'keep for older msgbox msgs  
End Sub
Function PBMain
  Call test_Include
  ? "Worked"
End Function
'

[Kev Peel]

Yes it's a new restriction due to the forward-referencing feature.
Simply move the constant(s) outside of a FUNCTION or SUB and the code will compile fine.

[Paul Squires]

Looks like only subs/functions can be forward referenced, right? I tried a quick test to see if equates and types could be forward referenced and I don't think they can. They need to be defined prior to being referenced. Am I correct in saying that?

[José Roca]

Yes.

[Rodney Hicks]

They need to be defined prior to being referenced.

They can now be redefined prior to being used.

[Richard Angell]

Just to be clear the help file notes (What's New, Additional Changes), an equate (constant) that can be re-defined before use is one "which is pre-defined in the compiler"

Here's the complete change remark:

Any numeric equate or string equate which is pre-defined in the compiler may be assigned a revised value if the new assignment is performed before the equate is referenced in the program

[George Bleck]

I would consider a slight language rewrite as follows:

The value of any numeric equate or string equate which is pre-defined in the compiler may overridden if the new assignment is performed before the equate is referenced in the program

[Rodney Hicks]

which is pre-defined in the compiler

Who put that there?
Well, that's only my second mistake, first since 1962.

Glad somebody caught it.

[Michael Mattias]

It's just as well that that it's only pre-defined constants. Otherwise you could inadvertently redefine some equate you forgot you had used and buried deep down in some #INCLUDE file.

That's why I use #IF %DEF(%equate_name) a lot. Very handy.

Still waiting (apparently) for support for '%Def (procedure_name)' but setting my own equates and using %DEF(%equate_meaning_procedure_name_is_defined) works OK.

#UNDEF and/or #REDEF would still be useful.

MCM

[Dale Yarker]

delete