tarau.jinni
Class lazy_head

java.lang.Object
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  +--tarau.jinni.Term
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        +--tarau.jinni.Nonvar
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              +--tarau.jinni.Const
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                    +--tarau.jinni.Fun
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                          +--tarau.jinni.FunBuiltin
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                                +--tarau.jinni.lazy_head

class lazy_head

extends FunBuiltin

returns the first element of a lazy list

Fields inherited from class tarau.jinni.Fun

args

Fields inherited from class tarau.jinni.Const

aFail, anEof, aNil, aNo, aTrue, aYes, sym

Fields inherited from class tarau.jinni.Term

CONST, INT, JAVA, REAL, VAR

Constructor Summary

(package private)

lazy_head()

Method Summary

int	exec(Prog p) Executed when a builtin is called.

Methods inherited from class tarau.jinni.FunBuiltin

isBuiltin

Methods inherited from class tarau.jinni.Fun

bind_to, funClone, funToString, getArg, getArity, getIntArg, init, initializedClone, isClause, listify, putArg, reaction, setArg, show_args, toBuiltin, token, toString, unify_to, unInitializedClone, watchNull

Methods inherited from class tarau.jinni.Const

eq, getKey, name, qname, the, toUnquoted

Methods inherited from class tarau.jinni.Term

action, charsToString, copy, exec, fromString, matches, matching_copy, numbervars, pprint, pprint, ref, stringToChars, toChars, toClause, toObject, toTerm, undo, unify, varsOf

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, wait, wait, wait

Constructor Detail

lazy_head

lazy_head()

Method Detail

exec

public int exec(Prog p)

Description copied from class: Term

Executed when a builtin is called. Needs to be overriden. Returns a run-time warning if this is forgotten.

Overrides:

exec in class FunBuiltin