(fasmg) invalid identifier

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Mike Gonta

Joined: 26 Dec 2010
Posts: 243

Mike Gonta 07 Apr 2017, 10:19

Code:

include '8086.inc'
        org     100h
display_text = 9
hello_asm:
        mov     ah,display_text
        mov     dx,.1
        int     21h
        int     20h
.1 db 'Hello world!',24h

The use of doted numbers as labels is very popular (at least with me).
Even (for example) hello_asm.1 is an invalid identifier

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07 Apr 2017, 10:19

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8354
Location: Kraków, Poland

Tomasz Grysztar 07 Apr 2017, 10:23

In fasmg "." is no longer a part of label, it is a special character that here indicates that symbol is going to be defined in the "hello_asm" namespace. Because it is not allowed to have a symbol with name "1", this results in error. This is something that is a consequence of fasmg having namespaces and it cannot be easily altered in this architecture.

07 Apr 2017, 10:23

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8354
Location: Kraków, Poland

Tomasz Grysztar 07 Apr 2017, 18:23

As a side note: even in fasm 1 such labels were a bit non-standard (I would personally avoid them), as before version 1.52 a symbol like ".1" was interpreted as a floating-point number.

07 Apr 2017, 18:23

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8354
Location: Kraków, Poland

Tomasz Grysztar 03 Sep 2017, 20:10

With the new releases of fasmg the identifier requirements are relaxed, numeric names are now allowed after the dot operator. The above source now assembles with no changes.

I'm sorry this took so long, I needed to re-consider the idea several times before I realized that this shouldn't hurt anything.

03 Sep 2017, 20:10

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