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Diffstat (limited to 'doc/lispref/control.texi')
| -rw-r--r-- | doc/lispref/control.texi | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/doc/lispref/control.texi b/doc/lispref/control.texi index 22b665bc931..06da1025186 100644 --- a/doc/lispref/control.texi +++ b/doc/lispref/control.texi @@ -555,6 +555,16 @@ Two symbols to avoid are @code{t}, which behaves like @code{_} Likewise, it makes no sense to bind keyword symbols (@pxref{Constant Variables}). +@item (cl-type @var{type}) +Matches if @var{expval} is of type @var{type}, which is a type +descriptor as accepted by @code{cl-typep} (@pxref{Type Predicates,,,cl,Common +Lisp Extensions}). Examples: + +@lisp +(cl-type integer) +(cl-type (integer 0 10)) +@end lisp + @item (pred @var{function}) Matches if the predicate @var{function} returns non-@code{nil} when called on @var{expval}. The test can be negated with the syntax @@ -1273,6 +1283,15 @@ bindings that can then be used inside @var{body}. The variable bindings are produced by destructuring binding of elements of @var{pattern} to the values of the corresponding elements of the evaluated @var{exp}. + +Here's a trivial example: + +@example +(pcase-let ((`(,major ,minor) + (split-string "image/png" "/"))) + minor) + @result{} "png" +@end example @end defmac @defmac pcase-let* bindings body@dots{} @@ -1302,6 +1321,10 @@ element of @var{list}. The bindings are performed as if by up being equivalent to @code{dolist} (@pxref{Iteration}). @end defmac +@defmac pcase-setq pattern value@dots{} +Assign values to variables in a @code{setq} form, destructuring each +@var{value} according to its respective @var{pattern}. +@end defmac @node Iteration @section Iteration |