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Smile



Joined: 07 May 2006
Posts: 6
Smile
Hi

Used compiler fasm-1.64

Code:
macro Parse string
{
 match char tail, string
 \{
  Parse tail ; extra characters on line 'parse+1'
 \}
}

Parse 1+1
    


What is wrong?
Post 08 May 2006, 21:05
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
In FASM 1.66 I get illegal instruction 'Parse+1' and it's OK because there is no previous macro definition named "Parse"
Post 08 May 2006, 21:59
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Smile



Joined: 07 May 2006
Posts: 6
Smile
so i can not use recursion at all?
Post 08 May 2006, 22:56
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
In that way not, if you call a macro with the same name that the current macro you will call the previous definition.

2.3.3 Macroinstructions wrote:
macro mov op1,op2
{
if op1 in <ds,es,fs,gs,ss> & op2 in <cs,ds,es,fs,gs,ss>
push op2
pop op1
else
mov op1,op2
end if
}


"mov op1, op2" is not a recursive call, it calls the previous definition of that macro and since there is not one the MOV instruction is assembled.

Recursion is posible with some tricks, but, I can't remember...
[edit]Maybe you can get some info in win32ax.inc with the allow_nesting macro[/edit]
Post 08 May 2006, 23:12
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dead_body



Joined: 21 Sep 2005
Posts: 188
Location: Ukraine,Kharkov
dead_body
Code:
macro Parse string 
{ 
 match char tail, string 
 \{ 
  ;here you must include macro Parse(it must be in another file)
  Parse tail ; extra characters on line 'parse+1'
  ;here purge it 
 \} 
} 

Parse 1+1    


read about this in documentation.

it is one of the way to do recursion.
Post 09 May 2006, 07:21
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Tomasz Grysztar
Assembly Artist


Joined: 16 Jun 2003
Posts: 7543
Location: Kraków, Poland
Tomasz Grysztar
See the PARSECOND macro in the MACRO/IF.INC in fasmw package. It does some parsing without recursion, it uses IRPS instead.
As for sample recursion, you can find some in the JNCONDEL and other similar macros in the same file.
Post 09 May 2006, 07:32
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7108
Location: Slovakia
vid
Code:
macro Define_Parse {
  macro Parse \{  
    Define_Parse
    Parse
  \}
}
Define_Parse    

this is the idea


Last edited by vid on 09 May 2006, 12:31; edited 1 time in total
Post 09 May 2006, 09:48
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Tomasz Grysztar
Assembly Artist


Joined: 16 Jun 2003
Posts: 7543
Location: Kraków, Poland
Tomasz Grysztar
vid: well said. Smile
Post 09 May 2006, 12:14
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7108
Location: Slovakia
vid
thanks, anyway it's stolen from your nested call macros Wink
Post 09 May 2006, 12:30
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