local label names conflict

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CandyMan

Joined: 04 Sep 2009
Posts: 414
Location: film "CandyMan" directed through Bernard Rose OR Candy Shop

CandyMan 23 Dec 2022, 15:19

Code:

Name?0:

macro test
{
local Name
Name: mov eax,Name ;<- symbol already defined
}

test

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23 Dec 2022, 15:19

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8359
Location: Kraków, Poland

Tomasz Grysztar 23 Dec 2022, 17:32

It's a limitation of the multi-layered architecture of fasm 1, where the preprocessor needs to generate identifiers for local labels that are then passed to parser/assembler. Whatever the rule would be used to form these names, you would be able to collide with them manually, because the text generated by preprocessor is the same kind of text that you could just input directly. This is easily demonstrated by PREPSRC tool, which generates a text that can be normally assembled by fasm.

The new engine, used by fasmg, does not have this problem, as it has a true namespace separation by design.

23 Dec 2022, 17:32

CandyMan

Joined: 04 Sep 2009
Posts: 414
Location: film "CandyMan" directed through Bernard Rose OR Candy Shop

CandyMan 24 Dec 2022, 12:25

Can you replace the "?" for example ";" in local labels (one that cannot be "entered")?

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smaller is better

24 Dec 2022, 12:25

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8359
Location: Kraków, Poland

Tomasz Grysztar 24 Dec 2022, 12:33

It would break any uses that assume tokens to be correctly translatable back to text (like mentioned PREPSRC).

24 Dec 2022, 12:33

CandyMan

Joined: 04 Sep 2009
Posts: 414
Location: film "CandyMan" directed through Bernard Rose OR Candy Shop

CandyMan 24 Dec 2022, 12:38

It's hard, you can't have everything.

Thanks.

24 Dec 2022, 12:38

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