1 ! Copyright (C) 2008 Doug Coleman.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: help.markup help.syntax io.streams.string quotations
5 IN: combinators.short-circuit
8 { $values { "quots" "a sequence of quotations with stack effect " { $snippet "( -- ? )" } } { "?" "the result of the last quotation, or " { $link f } } }
9 { $description "If every quotation in the sequence outputs a true value, outputs the result of the last quotation, otherwise outputs " { $link f } "." } ;
12 { $values { "quots" "a sequence of quotations with stack effect " { $snippet "( -- ? )" } } { "?" "the first true result, or " { $link f } } }
13 { $description "If every quotation in the sequence outputs " { $link f } ", outputs " { $link f } ", otherwise outputs the result of the first quotation that did not yield " { $link f } "." } ;
16 { $values { "obj" object } { "quots" "a sequence of quotations with stack effect " { $snippet "( obj -- ? )" } } { "?" "the result of the last quotation, or " { $link f } } }
17 { $description "If every quotation in the sequence outputs a true value, outputs the result of the last quotation, otherwise outputs " { $link f } "." } ;
20 { $values { "obj" object } { "quots" "a sequence of quotations with stack effect " { $snippet "( obj -- ? )" } } { "?" "the first true result, or " { $link f } } }
21 { $description "Returns true if any quotation in the sequence returns true. Each quotation takes the same element from the datastack and must return a boolean." } ;
24 { $values { "obj1" object } { "obj2" object } { "quots" "a sequence of quotations with stack effect " { $snippet "( obj1 obj2 -- ? )" } } { "?" "the result of the last quotation, or " { $link f } } }
25 { $description "If every quotation in the sequence outputs a true value, outputs the result of the last quotation, otherwise outputs " { $link f } "." } ;
28 { $values { "obj1" object } { "obj2" object } { "quots" "a sequence of quotations with stack effect " { $snippet "( obj1 obj2 -- ? )" } } { "?" "the first true result, or " { $link f } } }
29 { $description "Returns true if any quotation in the sequence returns true. Each quotation takes the same two elements from the datastack and must return a boolean." } ;
32 { $values { "obj1" object } { "obj2" object } { "obj3" object } { "quots" "a sequence of quotations with stack effect " { $snippet "( obj1 obj2 obj3 -- ? )" } } { "?" "the result of the last quotation, or " { $link f } } }
33 { $description "If every quotation in the sequence outputs a true value, outputs the result of the last quotation, otherwise outputs " { $link f } "." } ;
36 { $values { "obj1" object } { "obj2" object } { "obj3" object } { "quots" "a sequence of quotations with stack effect " { $snippet "( obj1 obj2 obj3 -- ? )" } } { "?" "the first true result, or " { $link f } } }
37 { $description "Returns true if any quotation in the sequence returns true. Each quotation takes the same three elements from the datastack and must return a boolean." } ;
41 { "quots" "a sequence of quotations" } { "n" integer }
42 { "quot" quotation } }
43 { $description "A macro that rewrites the code to pass " { $snippet "n" } " parameters from the stack to each quotation, evaluating the result in the same manner as " { $link 0&& } "." } ;
47 { "quots" "a sequence of quotations" } { "n" integer }
48 { "quot" quotation } }
49 { $description "A macro that rewrites the code to pass " { $snippet "n" } " parameters from the stack to each OR quotation." } ;
51 ARTICLE: "combinators.short-circuit" "Short-circuit combinators"
52 "The " { $vocab-link "combinators.short-circuit" } " vocabulary stops a computation early once a condition is met." $nl
67 "Generalized combinators:"
74 ABOUT: "combinators.short-circuit"