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Siberian



Joined: 09 Mar 2010
Posts: 14
Siberian
Hello.

Is there anybody to help me with macro constructions?
I'm trying to write a macro which will be used to create other macros from the list of supplied arguments. But during one of development phase I got stuck with a problem, which I'm still not capable to resolve.

Here is short excerpt of the working version:
Code:
macro MacroBuilder varName, macroName, action {
  macro varName#.#macroName \{
          action
      \}
}

macro DisplayOk {
    display 'Ok', 13, 10
}

MacroBuilder testVar, DisplayOk, DisplayOk

testVar.DisplayOk
    


Then I decided to replace one of the arguments with global constant:
Code:
macro MacroBuilder varName, macroName {
      macro varName#.#macroName \{
          Action
      \}
}

macro DisplayOk {
    display 'Ok', 13, 10
}

Action equ DisplayOk

MacroBuilder testVar, DisplayOk

testVar.DisplayOk
    

and right away I got first problem in the form of error message which said that Action is illegal instruction. After studying preprocessor dumps I realized that macro receives an argument by reference, not by value, so I added a match directive to do argument dereferencing which improved the situation (I use here HLL terms because I don't know more appropriate ones). So I got this code, which also worked:
Code:
macro MacroBuilder varName, macroName {
  macro varName#.#macroName \{
          match act, Action \\{
                        act
         \\}
  \}
}

macro DisplayOk {
    display 'Ok', 13, 10
}

Action equ DisplayOk

MacroBuilder testVar, DisplayOk

testVar.DisplayOk
    

But then I decided to remove macroName argument as well and replace it with global constant the same way as with action argument. Considering the previous experience with referenced argument the resulting code should look like this:
Code:
macro MacroBuilder varName {
      match name, MacroName \{
              macro varName#.#name \\{
                     match act, Action \\\{
                              act
                 \\\}
                \\}
  \}
}

macro DisplayOk {
    display 'Ok', 13, 10
}

Action          equ DisplayOk
MacroName      equ DisplayOk

MacroBuilder testVar

testVar.DisplayOk
    

but it doesn't work. I have played a little bit with fix directive, and it helped but only when I had it before macro declaration, which doesn't suit my purposes at all.
Is there another way to make it work as intended?

Thank you.
Post 13 Mar 2010, 17:10
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17287
Location: In your JS exploiting you and your system
revolution
You need to escape the hashes (#).
Code:
macro varName\#.\#name    
Post 13 Mar 2010, 17:15
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Siberian



Joined: 09 Mar 2010
Posts: 14
Siberian
So hashes are also bound to current macro context. Good to know. Thank you revolution for such a quick answer. Smile
Post 13 Mar 2010, 17:21
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17287
Location: In your JS exploiting you and your system
revolution
You have to tell the preprocessor at what depth you need the hashes processed. You do this by prefixing the appropriate number of backslashes.
Post 13 Mar 2010, 17:24
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Siberian



Joined: 09 Mar 2010
Posts: 14
Siberian
Yes, I understand. That is what I call "sensitive (or bound) to current macro context". I just didn't know that hashes are "sensitive" too. Thank you again. Smile
Post 13 Mar 2010, 17:31
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