Return to the
comp.compilers page.
Search the
comp.compilers archives again.
| Related articles |
|---|
| Yacc with multiple entry points. rockbrentwood@gmail.com (2019-12-09) |
| From: | rockbrentwood@gmail.com |
| Newsgroups: | comp.compilers |
| Date: | Mon, 9 Dec 2019 16:13:06 -0800 (PST) |
| Organization: | Compilers Central |
| Injection-Info: | gal.iecc.com; posting-host="news.iecc.com:2001:470:1f07:1126:0:676f:7373:6970"; logging-data="96022"; mail-complaints-to="abuse@iecc.com" |
| Keywords: | yacc, parse, comment |
| Posted-Date: | 10 Dec 2019 13:23:10 EST |
There is a lot of saving and code-reuse possible if multiple entry points are allowed in a parser generator. This can be done by a simple extension of the LR process, but does complicate the issue of end-markers a little.
You'll see brief mention of it, by the way, here on page 199 of the Lex and Yacc reference. https://books.google.com/books?id=vsHcnR4kXIAC&pg=PA199&lpg=PA199 authored by (... searching author page ...) Oh! The moderator, John!
[I put the same trick on pp 163-164 of flex&bison. Fiddle the lexer
so it sends the parser a fake token when it starts and use initial
rules with the fake token to select the real entry point. That works
in plain yacc or bison. -John]
Return to the
comp.compilers page.
Search the
comp.compilers archives again.