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Re: How to add pseudo vector types

From: Yuan Fu
Subject: Re: How to add pseudo vector types
Date: Mon, 26 Jul 2021 15:06:14 -0400

>>> If we let TS look where it wants, we will lose the ability to restrict
>>> it to a certain part of the buffer text.  This is needed at least for
>>> some specialized modes, and is generally desirable, as it gives Lisp
>>> programs an easy way to impose such restrictions whenever they need.
>> Tree-sitter lets you set ranges for a parser to limit it self within, in 
>> order to support multi-language files.
> That's okay, but why would we want to expose this to Lisp as the means
> to restrict the accessible portion, when we already have such a means?

Tree-sitter lets you set multiple discontinuous ranges, whereas narrowing can 
only narrow to a single continuous range. Multiple discontinuous range is much 
more useful for HTML+CSS+JS, or PHP + HML.


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