On Wednesday 28 June 2006 02:26, João Cruz Morais wrote: > With that said I have some questions (i'm sorry if they were answered > already somewhere): > - Whats the point of using PGE+TGE over the good old LEX+YACC besides the > better regexps?
Transforming trees with real objects is a lot easier than mangling C data structures. > - Can I use PGE skipping TGE? Yes. > - PAST seems just fine as a concept but isn't it useless if I can target > directly to POST with minor fuss? Define "minor"; I've found it much easier in Pheme to go from one tree structure to another rather than from one textual representation to another. After a bit of learning, it's pretty obvious which is the appropriate level for a specific transformation. (Oh, I want to hoist out define-lambda pairs; that's obviously PAST, so that I can scan the whole tree for Sub declarations and get the symbol names later.) -- c
