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Re: [Emacs-diffs] master 8dafacd: * lisp/emacs-lisp/syntax.el (syntax-pp

From: Stefan Monnier
Subject: Re: [Emacs-diffs] master 8dafacd: * lisp/emacs-lisp/syntax.el (syntax-ppss-table): New var
Date: Sun, 17 Jan 2016 16:32:42 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux)

>>> * lisp/emacs-lisp/syntax.el (syntax-ppss-table): New var
>> Are there any particular cases where we should use it?

Any time where you want to use a different syntax-table.  E.g. e use it
in nxml-mode where the syntax-table to use normally should be
"text-like" (e.g. parens are matched), but where actual formal parsing
needs something very different (since nothing guarantees that parens
are matched, whereas matching <..> is a lot more useful).

I expect it to be handy as well in cases where the "normal" syntax table
may be changed at various times.  E.g. this allows the use of
syntax-ppss within with-syntax-table.  I actually imagine it may become
"normal and recommended" to set syntax-ppss-table in any buffer where
with-syntax-table may be used, since syntax-ppss can very easily be
triggered by accident (e.g. via forward-sexp -> syntax-propertize ->

>> You've added the var, but without any usages.

Actually there is one usage in trunk (in nxml).  I just mistakenly
installed it before installing the corresponding change in syntax.el.


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