[antlr-interest] Multi-level format parsing

[Martin Probst]

Hi,
> stmt_assign : LITERAL EQU QUOTEDLITERAL ;
>
> And later, after 1st level parsing, I remove quotes from  
> QUOTEDLITERAL and parse it again.
>
> But I would like to add this code directly to ANTLR grammar.
Does every literal contain executable code? How do you detect if it's  
supposed to contain code?

You could probably do something with nested parsers and lexers, but  
maybe you could also employ some sort of hack with lexer states, so  
like if the literal before the EQU was "CodeParam" then ignore the  
quotes and parse the code directly.

An important question is maybe also how you want to disambiguate between
CodeParam = "Var2 = ""text"""
and
CodeParam = Var2 = ""text""

Martin