"

 COPYRIGHT (c) 2006 by eXept Software AG

              All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

"{ Package: 'stx:libbasic' }"

Object subclass:#Lookup

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	category:'Kernel-Classes'

!

!Lookup class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 2006 by eXept Software AG

              All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

! !

!Lookup class methodsFor:'initialization'!

initialize

    self lookupObject: Lookup builtin

    "Created: / 26-04-2010 / 21:15:18 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!Lookup class methodsFor:'accessing'!

builtin

    ^BuiltinLookup instance

    "Created: / 26-04-2010 / 19:26:21 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!Lookup methodsFor:'lookup'!

lookupMethodForSelector: selector directedTo: initialSearchClass

     |cls md method|

	"Following C code is just a performance optimization.

	 It is not neccessary, however it speeds up UI code,

	 since it heavily uses perform:"

%{

	RETURN (  __lookup(initialSearchClass, selector) );

%}.

     cls := initialSearchClass.

     [ cls notNil ] whileTrue:[

        md := cls methodDictionary.

        method := md at:selector ifAbsent:nil.

        method notNil ifTrue:[^ method ].

        cls := cls superclass.

     ].

     ^ nil

    "Created: / 27-04-2010 / 15:30:24 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

lookupMethodForSelector:selector directedTo:initialSearchClass for:aReceiver withArguments:argArrayOrNil from:sendingContext

    "invoked by the VM to ask me for a method to call.

     The arguments are: the selector, receiver and arguments,

     the class to start the search in (for here-, super and directed sends)

     the sending context.

     The returned method object will be put into the inline- and polyCache

     at the call site; it might therefore be called more than once for the

     same receiver-class/selector combination (once for each call site).

     If I return nil, a doesNotUnderstand will be invoked."

     |cls md method|

	"Following C code is just a performance optimization.

	 It is not neccessary, however it speeds up UI code,

	 since it heavily uses perform:"

%{

	RETURN (  __lookup(initialSearchClass, selector) );

%}.

    ^ self lookupMethodForSelector: selector 

		   directedTo: initialSearchClass

!

lookupMethodForSelector:selector directedTo:initialSearchClass for:aReceiver withArguments:argArrayOrNil from:sendingContext ilc: ilcCache

    "Created: / 01-10-2011 / 13:18:40 / Jan Kurs <kursjan@fit.cvut.cz>"

! !

!Lookup class methodsFor:'documentation'!

version_SVN

! !

Lookup initialize!