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Clarify the doc string of plist-memeber and plist-put

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* src/fns.c (Fplist_member):
(Fplist_put): Clarify what comparison function is used for PROP
(bug#47426) and don't claim that PROP has to be a symbol.
This commit is contained in:
Lars Ingebrigtsen 2021-03-28 14:58:43 +02:00
parent aceaa0a334
commit 661f52f6d0
1 changed files with 8 additions and 2 deletions
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10
src/fns.c
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@ -2369,7 +2369,10 @@ This is the last value stored with `(put SYMBOL PROPNAME VALUE)'. */)
DEFUN ("plist-put", Fplist_put, Splist_put, 3, 3, 0,
doc: /* Change value in PLIST of PROP to VAL.
PLIST is a property list, which is a list of the form
\(PROP1 VALUE1 PROP2 VALUE2 ...). PROP is a symbol and VAL is any object.
\(PROP1 VALUE1 PROP2 VALUE2 ...).
The comparison with PROP is done using `eq'.
If PROP is already a property on the list, its value is set to VAL,
otherwise the new PROP VAL pair is added. The new plist is returned;
use `(setq x (plist-put x prop val))' to be sure to use the new value.
@ -3211,7 +3214,10 @@ suppressed. */)
DEFUN ("plist-member", Fplist_member, Splist_member, 2, 2, 0,
doc: /* Return non-nil if PLIST has the property PROP.
PLIST is a property list, which is a list of the form
\(PROP1 VALUE1 PROP2 VALUE2 ...). PROP is a symbol.
\(PROP1 VALUE1 PROP2 VALUE2 ...).
The comparison with PROP is done using `eq'.
Unlike `plist-get', this allows you to distinguish between a missing
property and a property with the value nil.
The value is actually the tail of PLIST whose car is PROP. */)