SRFI 2: AND-LET*: an AND with local bindings, a guarded LET* special form

by Oleg Kiselyov

status: final (1999-03-01)

keywords: Binding, Control Flow

See also SRFI 202: Pattern-matching Variant of the and-let* Form that Supports Multiple Values.

Abstract

Like an ordinary AND, an AND-LET* special form evaluates its arguments -- expressions -- one after another in order, till the first one that yields #f. Unlike AND, however, a non-#f result of one expression can be bound to a fresh variable and used in the subsequent expressions. AND-LET* is a cross-breed between LET* and AND.