2002-08-01 00:34:42 +01:00
<?xml version="1.0" encoding="iso-8859-1"?>
2005-12-24 18:00:21 +00:00
< !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
2001-06-06 21:07:01 +01:00
2005-12-24 18:00:21 +00:00
< html xmlns = "http://www.w3.org/1999/xhtml" xml:lang = "en" >
2001-06-06 21:07:01 +01:00
< head >
2003-12-30 13:33:51 +00:00
< meta http-equiv = "content-type" content = "text/html; charset=iso-8859-1" / >
< title > Logtalk control construct: ::/2< / title >
2005-12-24 18:00:21 +00:00
< link rel = "stylesheet" href = "../../screen.css" type = "text/css" media = "screen" / >
< link rel = "stylesheet" href = "../../print.css" type = "text/css" media = "print" / >
2001-06-06 21:07:01 +01:00
< / head >
< body >
2005-12-24 18:00:21 +00:00
< div class = "top-left" > Logtalk reference manual< / div >
< div class = "top-right" > Control construct: ::/2< / div >
< div class = "bottom-left" > < span class = "page" / > < / div >
< div class = "bottom-right" > < span class = "page" / > < / div >
< div class = "navtop" > < a href = "../../index.html" > contents< / a > > < a href = "../index.html" > reference manual< / a > > < a href = "../index.html#constructs" > control constructs< / a > < / div >
2003-12-30 13:33:51 +00:00
2005-12-24 18:00:21 +00:00
< h2 class = "code" > ::/2< / h2 >
2001-06-06 21:07:01 +01:00
< h4 > Description< / h4 >
2003-12-30 13:33:51 +00:00
< pre > Object::Predicate
2001-06-06 21:07:01 +01:00
(Object1, Object2, ...)::Predicate
2001-12-05 23:57:48 +00:00
(Object1; Object2; ...)::Predicate
2001-06-06 21:07:01 +01:00
Object::(Predicate1, Predicate2, ...)
2003-12-30 13:33:51 +00:00
Object::(Predicate1; Predicate2; ...)< / pre >
2001-06-06 21:07:01 +01:00
< p >
2002-08-26 17:45:50 +01:00
Sends a message to an object. The message argument must match a public predicate of the receiver object. We can also send the same message to a set of objects or a set of messages to the same object. The "< code > ,< / code > " and "< code > ;< / code > " in the list have the usual Prolog meaning.
2001-06-06 21:07:01 +01:00
< / p >
< h4 > Template and modes< / h4 >
2003-12-30 13:33:51 +00:00
< pre > +receivers::+messages< / pre >
2001-06-06 21:07:01 +01:00
2001-12-05 23:57:48 +00:00
< h4 > Errors< / h4 >
2001-06-06 21:07:01 +01:00
< blockquote >
< dl >
< dt > Either Object or Predicate is a variable:< / dt >
< dd > < code > instantiation_error< / code > < / dd >
< dt > Predicate is declared private:< / dt >
< dd > < code > permission_error(access, private_predicate, Predicate)< / code > < / dd >
< dt > Predicate is declared protected:< / dt >
< dd > < code > permission_error(access, protected_predicate, Predicate)< / code > < / dd >
< dt > Predicate is not declared:< / dt >
< dd > < code > existence_error(predicate_declaration, Predicate)< / code > < / dd >
< dt > Object does not exist:< / dt >
< dd > < code > existence_error(object, Object)< / code > < / dd >
< / dl >
< / blockquote >
< h4 > Examples< / h4 >
2004-07-25 19:47:43 +01:00
< pre > | ?- list::member(X, [1, 2, 3]).
X = 1 ;
X = 2 ;
X = 3
2005-12-24 18:00:21 +00:00
yes< / pre >
2001-06-06 21:07:01 +01:00
2003-12-30 13:33:51 +00:00
< div class = "footer" >
2005-12-24 18:00:21 +00:00
< div class = "navbottom" > < a href = "../index.html#constructs" > previous< / a > | < a href = "../../glossary.html" > glossary< / a > | < a href = "to_self1.html" > next< / a > < / div >
< div class = "copyright" > Copyright © < a href = "mailto:pmoura@logtalk.org" > Paulo Moura< / a > — < a href = "http://www.logtalk.org" > Logtalk.org< / a > < / div >
< div class = "footnote" >
< span class = "validators" > < a href = "http://validator.w3.org/check/referer" > XHTML< / a > + < a href = "http://jigsaw.w3.org/css-validator/check/referer" > CSS< / a > < / span >
< span class = "date" > Last updated on: November 16, 2005< / span >
< / div >
2003-12-30 13:33:51 +00:00
< / div >
2005-12-24 18:00:21 +00:00
2003-12-30 13:33:51 +00:00
< / body >
2001-06-06 21:07:01 +01:00
< / html >
