Return to the
comp.compilers page.
Search the
comp.compilers archives again.
| Related articles |
|---|
| Lexical feedback plong@perf.com (Paul Long) (1995-09-22) |
| Re: Lexical feedback mnp@compass-da.com (Mitchell Perilstein) (1995-09-29) |
| Re: Lexical feedback plong@perf.com (Paul Long) (1995-10-06) |
| Lexical feedback 75066.3204@CompuServe.COM (Carl Barron) (1995-10-21) |
| Re: Lexical feedback rich@rdp.introl.com (Richard Pennington) (1995-10-22) |
| Re: Lexical feedback pardo@cs.washington.edu (1995-10-23) |
| Re: Lexical feedback vern@daffy.ee.lbl.gov (1995-10-25) |
| Newsgroups: | comp.compilers |
| From: | Mitchell Perilstein <mnp@compass-da.com> |
| Keywords: | parse, yacc, comment |
| Organization: | Compilers Central |
| References: | 95-09-143 |
| Date: | Fri, 29 Sep 1995 04:23:26 GMT |
What's wrong with the parser communicating its state to the lexer at the
same time it asks the lexer for the next token?
I'm about to do exactly this for a C-like language that has its own
macro processor. Some of the macros are only valid in certain contexts.
If I pass a little context information to lex from the parser, all the
macros can be handled by lex. Fortunately, this is a by-hand lex and
parser; who knows how to teach lex and yacc this trick without globals?
What are the reasons for your hesitation?
---
Mitchell N. Perilstein [\]
COMPASS Design Automation, Columbia MD USA
mnp@compass-da.com
Tel: 410-992-5700 x1225, Fax: 410-992-3536
[Don't forget that yacc can be reading a token ahead of where it's parsing.
That makes lexical feedback more exciting. -John]
--
Return to the
comp.compilers page.
Search the
comp.compilers archives again.