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Index > Main > Legal label characters

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marksibly



Joined: 10 Sep 2003
Posts: 2
marksibly
Hi,

The docs are a bit vague on this, so what exactly are the legal characters that can appear within a label?

A forum search reveals that '.' is legal, but not at the start of a label. How about '$'? any others?

Will such labels export correctly?

Bye!
Mark
Post 08 Feb 2004, 01:49
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JohnFound



Joined: 16 Jun 2003
Posts: 3502
Location: Bulgaria
JohnFound
Hi.
Actually "." is valid symbol even at the begining of the label, only it have a little bit special meaning. Point as first char in label defines so called "local" labels. Actually this means that the label with point will be concatenated with the last used "global" label (i.e. without "." as first char) for form the full name of the label. This allows programmer to create equal names for labels in different parts of code, for example subroutines.
Another case is with labels begining with two points: '..'
Such labels are global, but they did not become "current" global label. Example:
Code:
SomeGlobal1:
    nop
.local1: 
    nop
.local2:
SomeGlobal2:
    nop
.local1: 
    nop
..GlobalNotCurrent:
    nop
.local2:
    ret     Wink
    


In the above example the full names of the labels are:
1) SomeGlobal1
2) SomeGlobal1.local1
3) SomeGlobal1.local2
4) SomeGlobal2
5) SomeGlobal2.local1
6) ..GlobalNotCurrent
7) SomeGlobal2.local2

Regards
Post 08 Feb 2004, 02:30
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