Two pass scanning

[Henrik Sorensen]

Hi List,

For the gnu pl1 project, I am investigating various approaches to perform two 
pass scanning and parsing.

Beside the obvious choice, of reading the source files twice, has other 
approaches for two pass scanning been tried ?

This is what I had in mind: 
First pass scans the source code and stores tokens and strings away, before 
returning to the parser. The second pass reads the stored tokens instead of 
the actual source code.

Would the YY_BREAK macro, be the right place to add code that saves the tokens 
and strings during the first pass before returning to the parser ?

Any comments, references or other ideas are highly appreciated.

Thanks

Henrik