bug#36486: [PATCH] Add tests for text-property-search to check prop-match-value

[Lars Ingebrigtsen <larsi@gnus.org>]

Juri Linkov <juri@linkov.net> writes:

>> I don't understand -- this will still return a symbol.  (And error out
>> if you enter stuff like "foo bar".)
>
> Yes, entering a symbol returns a symbol, entering a string
> like "foo bar" returns a string "foo bar" literally.

Oh, right.  Hm.  Well, entering things with "..." is very unusual in
Emacs prompts, so if we want that, the prompt should at least say that
that's what's expected...

> Currently text-property-search-forward has more problems:
> today I needed to search the property ‘face’ with the value
> ‘hi-yellow’ in the buffer with regexps highlighted by hi-lock.el.
> Executing interactively:
>
>   M-x text-property-search-forward RET face RET hi-yellow RET
>
> failed to find the property because all hi-lock occurrences were
> combined with font-lock text properties, i.e. all they had the
> property ‘face’ with the value ‘(hi-yellow font-lock-keyword-face)’
> and text-property-search-forward fails to find a value in the list
> of values.

Yes, you can't really use text-property-search-forward to do that in any
meaningful manner, which is why I didn't add that to the interactive
bit.  It's a function useful almost only when programming, and the only
useful interactive thing is to vaguely poke around in the buffer.

-- 
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   bloggy blog: http://lars.ingebrigtsen.no