From: Paul Pogonyshev <pogonyshev@gmx.net>
To: emacs-devel@gnu.org
Cc: martin rudalics <rudalics@gmx.at>
Subject: Re: generic buffer parsing cache data
Date: Sun, 1 Jul 2007 15:16:31 +0300 [thread overview]
Message-ID: <200707011516.31959.pogonyshev@gmx.net> (raw)
In-Reply-To: <468794AB.20401@gmx.at>
martin rudalics wrote:
> > I propose that each point position could have "cached parsing data".
> > This would be an alist indexed with cache data identifier.
>
> Have you experimented with `syntax-ppss'?
I propose to add something generic. For instance, Python mode needs to
know indentation level of blocks. It seems that `syntax-ppss` doesn't
return it at all. And adding everything that might ever be needed by
some XYZ mode seems counter-productive and complicates an already complex
function and its return value.
I just mean that major modes can have needs beyond that suited by
`syntax-ppss`. And as far as I can see, they can either parse half of
the buffer each time they need something, or invent some ad-hoc custom
code for caching such data.
As a side note, I was told somewhen that `parse-partial-sexp` is not
limited to Lisp syntax. How about this amendment to documentation?
Paul
*** syntax.c 23 Jun 2007 12:18:14 +0300 1.206
--- syntax.c 01 Jul 2007 15:13:54 +0300
***************
*** 3021,3028 ****
}
DEFUN ("parse-partial-sexp", Fparse_partial_sexp, Sparse_partial_sexp, 2, 6, 0,
! doc: /* Parse Lisp syntax starting at FROM until TO; return status of parse at TO.
! Parsing stops at TO or when certain criteria are met;
point is set to where parsing stops.
If fifth arg OLDSTATE is omitted or nil,
parsing assumes that FROM is the beginning of a function.
--- 3021,3029 ----
}
DEFUN ("parse-partial-sexp", Fparse_partial_sexp, Sparse_partial_sexp, 2, 6, 0,
! doc: /* Parse syntax starting at FROM until TO; return status of parse at TO.
! Exact rules are determined by buffer's major mode. Parsing stops at
! TO or when certain criteria are met;
point is set to where parsing stops.
If fifth arg OLDSTATE is omitted or nil,
parsing assumes that FROM is the beginning of a function.
next prev parent reply other threads:[~2007-07-01 12:16 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-30 21:38 generic buffer parsing cache data Paul Pogonyshev
2007-07-01 11:48 ` martin rudalics
2007-07-01 12:16 ` Paul Pogonyshev [this message]
2007-07-01 12:38 ` martin rudalics
2007-07-01 13:41 ` Paul Pogonyshev
2007-07-01 15:20 ` martin rudalics
2007-07-01 20:40 ` Richard Stallman
2007-07-01 12:45 ` Thien-Thi Nguyen
2007-07-01 13:10 ` Paul Pogonyshev
2007-07-01 13:16 ` Lennart Borgman (gmail)
2007-07-01 13:43 ` Paul Pogonyshev
2007-07-01 13:28 ` joakim
2007-07-01 12:52 ` Stefan Monnier
2007-07-01 13:49 ` Paul Pogonyshev
2007-07-01 20:08 ` Stefan Monnier
2007-07-01 20:44 ` Paul Pogonyshev
2007-07-01 21:23 ` Stefan Monnier
2007-07-01 16:32 ` Richard Stallman
2007-07-01 16:32 ` Richard Stallman
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