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Index > Macroinstructions > eqtype question

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Nikolay Petrov



Joined: 22 Apr 2004
Posts: 101
Location: Bulgaria
Nikolay Petrov
Hi,
Why eqtype didn't work in this case
Code:
macro foo p
{if p eqtype ''
    append p ;macro from fasm manual
 end if}

list equ
foo '555'
foo '444'
foo eax
list; result is '555','444',eax. if check p eqtype % - result is identical Confused     


thanks
Post 13 Mar 2006, 19:53
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Tomasz Grysztar
Assembly Artist


Joined: 16 Jun 2003
Posts: 7715
Location: Kraków, Poland
Tomasz Grysztar
EQU is a directive of preprocessor, while IF is a directive of assembler. Thus IF cannot affect the EQU, since prepressor finishes its job even before assembler has the change to look at the source.
This problem is covered in FAQ, and also in my recent Understanding fasm article, which I write to explain those confusing things about preprocessor and assembler (though you have to wait a bit till it's finished).

The solution is to use MATCH instead, which can be frequently used as an analogue of IF for the preprocessor. In this case it may look like:
Code:
macro foo p
{ match `p,p
  \{ append p \} }    
Post 13 Mar 2006, 19:59
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Nikolay Petrov



Joined: 22 Apr 2004
Posts: 101
Location: Bulgaria
Nikolay Petrov
didn't work on fasm 1.64(unexpected characters) - i will download the new version and try it.
thanks again
Post 13 Mar 2006, 20:51
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Tomasz Grysztar
Assembly Artist


Joined: 16 Jun 2003
Posts: 7715
Location: Kraków, Poland
Tomasz Grysztar
Oh, right, the ` operator was not yet as fully suppoted by 1.64 as it is by 1.65.
Post 13 Mar 2006, 21:05
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