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Index > Compiler Internals > [BUG] Macro doesn't always pass arguments

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Reverend



Joined: 24 Aug 2004
Posts: 408
Location: Poland
Reverend
I noticed that my macro doesn't pass arguments to the macro body as it should. Here's the macro and code:
Code:
 macro vmi_mov op1, arg2 {
  db 00h
  if arg2 > 16 ; error should be pointed here
   if op1 > 7
    db 1
    dq arg2
   else
    db 2
    db (op1 shl 4) or arg2 ; fasmw shows error here 'db(8 shl 4)or 100.0' Error: Invalid name
   end if
  else if arg2 = -1 | arg2 = -2
   db 3
   db op1
   db arg2
  else
   db 4
   db op1
   if op1 < 4
    dd arg2
   else
    dq arg2
   end if
  end if
 end if }

        vmi_mov 8, 100.0    
Error should be pointed before because when for example I created new asm file and put there:
Code:
if 100.0 < 16    
The error was pointed there and showing 'Error: Extra characters on line'
Post 12 Oct 2005, 20:42
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Tomasz Grysztar
Assembly Artist


Joined: 16 Jun 2003
Posts: 7715
Location: Kraków, Poland
Tomasz Grysztar
The "db(8 shl 4)or 100.0" error is detected at the parsing stage, which is before the actual assembly (when the errors like "if 100.0 > 16" are detected).

In general, do not rely that errors will be detected exactly in the order they occur in source. The other example are the "recoverable" errors, like the negative counts for data reservations of repeats, which are not signaled during the intermediate passes, since the bad values may become valid after the code get resolved better (see section 2.2.5 in manual), in opposite to "unrecoverable" errors, like the syntax ones.
Post 12 Oct 2005, 21:57
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