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* etc/NEWS: Rename 'type' -> 'ftype' and tweak it.

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This commit is contained in:
Andrea Corallo 2024-05-14 10:37:31 +02:00
parent b87670b564
commit e0cbed16b4
1 changed files with 5 additions and 4 deletions
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9
etc/NEWS
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@ -2488,16 +2488,17 @@ and see if you get only warnings that matter.
** Function 'declare' forms
+++
*** New 'type' function declaration.
The declaration '(type TYPE)' specifies the type of a function.
*** New 'ftype' function declaration.
The declaration '(ftype TYPE)' specifies the type of a function.
Example:
(defun hello (x y)
(declare (type (function (integer boolean) string)))
(declare (ftype (function (integer boolean) string)))
...)
specifies that the function takes two arguments, an integer and a
boolean, and returns a string. This information can be used by the
boolean, and returns a string. If the compilation happens with
'compilation-safety' set to zero, this information can be used by the
native compiler to produce better code, but specifying an incorrect type
may lead to Emacs crashing. See the Info node "(elisp) Declare Form"
for further information.