[antlr-interest] Rewriting questions

[pnicklas at freenet.de]

Hi!
 
I want to write a code rewriter, but I don't know how to realize the following pseudocode:
 
 
string[] list = {"int", "float"};
 
foreach(string newtype in list){
 
 //rewriting rule
 if(predefined_type != newtype)
 predefined_type -> newtype;
 
 // action: create the new TokenString
 tokens.ToString();
 
 // use the original tokens to go on
 tokens.ToOriginalString();
}
 
 
Explanation:
 
1. The first problem is, that I don't want to write a grammar for every type I want to insert. Can I use a list/array/multi-value type for that?
 
2. I don't want to replace all occurrencies of the type, only the first, the second etc. in the file. Can I execute an action (save the token strings) right after the rewrite and set the tokens back after that?
 
3. Can I insert some conditions in the rule, like exluding the actual type?
 
Do you have any better ideas to realize that?
(Sry for my newbie questions, I couldn't find it in the docs.)
 
Thank you.
 
Peter


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