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Silent UTF-8 assumption?

X-seq: zsh-workers 23410
From: Andrey Borzenkov <arvidjaar@xxxxxxxxxx>
To: zsh-workers@xxxxxxxxxx
Subject: Silent UTF-8 assumption?
Date: Thu, 10 May 2007 11:56:18 +0400
Mailing-list: contact zsh-workers-help@xxxxxxxxxx; run by ezmlm

This caught my attention:

static wchar_t
charref(char *x, char *y)
{
    wchar_t wc;
    size_t ret;

    if (!(patglobflags & GF_MULTIBYTE) || !(STOUC(*x) & 0x80))
        return (wchar_t) STOUC(*x);

well, this is definitely not valid for arbitrary multibyte character set. I am 
just curious if it is possible to consistently assume that UTF-8 is in use? 
That can definitely simplify things.

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Follow-Ups:
- Re: Silent UTF-8 assumption?
  - From: Peter Stephenson

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