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Re: character syntax fixes needed

From: Kenichi Handa
Subject: Re: character syntax fixes needed
Date: Tue, 12 Apr 2005 10:35:15 +0900 (JST)
User-agent: SEMI/1.14.3 (Ushinoya) FLIM/1.14.2 (Yagi-Nishiguchi) APEL/10.2 Emacs/22.0.50 (sparc-sun-solaris2.6) MULE/5.0 (SAKAKI)

In article <address@hidden>, Dave Love <address@hidden> writes:

> Kenichi Handa <address@hidden> writes:
>>  Unicode doesn't say which syntax a character should have in
>>  Emacs.

> I know it doesn't in detail -- the Emacs syntax codes don't actually
> map directly to the Unicode properties.  Categories can do that if
> appropriate.

>>  Even if we give guillemets "generic string
>>  delimiter" syntax, it doesn't mean emacs thinks it's not a
>>  punctuation character.  What emacs thinks is just that its
>>  SYNTAX is not "punctuation character", which doesn't
>>  conflict wiht Unicode's definition about a character.

> I don't understand what you mean, 

What I mean is that there's no confliction between these:
1) Emacs gives the syntax other than punctuation to character X.
2) Unicode categorizes X as a punctuation character.

> but if you give these things generic
> string syntax (a) it's contrary to what the Emacs doc says about how
> text modes should behave, (b) they have to be assumed to be balanced
> and (c) they have to be assumed not to nest like « … ‹ … › … ».

That is a meaningful point to be discussed.  But, as I don't
use those characters, I don't know what is the most
convenient behaviour of Emacs for users.

>>  So, it seems that even Unicode thinks that they are supposed
>>  to be used as a pair in some sense.

> Yes, typically, but they are not always used in pairs and as far as I
> remember, only the low-9 Latin quotation marks are used consistently.  

Even '(' and ')' are not always used in pairs as what I
wrote above, but don't you think it is convenient (in
general) that they have open/close paren syntaxes as now?

So, what is the more convenient behaviour for users (in
general) as to those guillemets; giving them punctuation
syntax, generic string syntax, or something else?

Ken'ichi HANDA

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