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Re: search-default-mode char-fold-to-regexp and Greek Extended block cha


From: Juri Linkov
Subject: Re: search-default-mode char-fold-to-regexp and Greek Extended block characters
Date: 2019年7月25日 21:46:20 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (x86_64-pc-linux-gnu)

> But this one I donʼt understand. Searching for iota (capital or small)
> in a buffer containing ΐ ΐ or Ϊ́ already works with
> char-fold-to-regexp, so why is this needed?
Searching for ι finds ΐ only when searching for a single letter ι
because the search matches the first part of ΐ that contains the base
character ι and ignores the remaining combining accents like ̈́
So for testing you need to search for longer strings, e.g.
in a buffer with this text "ΐΐΪ́." try to search for "ιιι."
It fails to find this text without adding (?ι "ΐ")
to char-fold-include.

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