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bug#30458: 26.0; `ucs-names': No reverse lookup function now
From: |
Andy Moreton |
Subject: |
bug#30458: 26.0; `ucs-names': No reverse lookup function now |
Date: |
Wed, 14 Feb 2018 19:04:11 +0000 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.0.91 (windows-nt) |
On Wed 14 Feb 2018, Drew Adams wrote:
> Before Emacs 26, `ucs-names' was an alist. That meant that you could
> not only look up a character, given its name or code, but you could also
> easily look up a character name, given the character:
>
> (car (rassq CHARACTER (ucs-names)))
>
> How is this done now, with (ucs-names) returning a hash table?
>
> There is now a function `char-from-name', to replace the former forward
> alist lookup (car (assoc CHAR-NAME (ucs-names))). But there doesn't
> seem to be any reverse lookup now for `ucs-names' (e.g. `char-name' or
> `char-name-from-char').
Looking at the implementation of ucs-names, does get-char-code-property
do what you want ?
(char-from-name "GREEK SMALL LETTER LAMBDA")
=> 955
(char-from-name "GREEK SMALL LETTER LAMDA")
=> 955
(get-char-code-property 955 'name)
=> "GREEK SMALL LETTER LAMDA"
(get-char-code-property 955 'old-name)
=> "GREEK SMALL LETTER LAMBDA"
HTH,
AndyM