Class: UndefinedVariable

• Inheritance
• Description
• Class protocol
  • instance creation
• Instance protocol
  • accessing
  • catching messages
  • error reporting
  • file skipping
  • printing & storing
  • private-accessing

Inheritance:

   Object
   |
   +--UndefinedVariable

Package:

stx:libcomp

Category:

System-Compiler-Support

Version:

rev: 1.28 date: 2021/01/20 10:29:54

user: cg

file: UndefinedVariable.st directory: libcomp

module: stx stc-classLibrary: libcomp

Description:

node for parse-trees, representing undefined variables
This is a helper class for the compiler.

This class exists solely for the error message when accessing undefined
variables - instead of returning nil,  the compiler returns an instance
of this class,  which will not understand ANY message.
The error message will then be 'UndefinedVariable ...' 
instead of 'UndefineObject ...', which is somewhat more informative.

copyright
COPYRIGHT (c) 1993 by Claus Gittinger
             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.

Class protocol:

 name: aString

Instance protocol:

 name

return the value of the instance variable 'name' (automatically generated)

 class

 methods

 methodsFor

 methodsFor: arg

 methodsFor: aCategory stamp: time

This was added to allow squeak code to be filedIn.

 privateMethodsFor: arg

 protectedMethodsFor: arg

 publicMethodsFor: arg

 subclass: t instanceVariableNames: f classVariableNames: d poolDictionaries: s

 subclass: t instanceVariableNames: f classVariableNames: d poolDictionaries: s category: cat

 subclass: t instanceVariableNames: f classVariableNames: d poolDictionaries: s classInstanceVariableNames: ci

 variableByteSubclass: t instanceVariableNames: f classVariableNames: d poolDictionaries: s category: cat

Modified (format): / 26-12-2020 / 13:36:35 / exept MBP

 variableSubclass: t instanceVariableNames: f classVariableNames: d poolDictionaries: s category: cat

Modified (format): / 26-12-2020 / 13:36:42 / exept MBP

 variableWordSubclass: t instanceVariableNames: f classVariableNames: d poolDictionaries: s category: cat

Modified (format): / 26-12-2020 / 13:36:45 / exept MBP

 methodError

 subclassingError

 fileInFrom: aStream notifying: someOne passChunk: passChunk

this is sent, if you continue after a warning about
methods for undefined class.
It simply skips chunks and sends a warning to the Transcript.

 printOn: aStream

print myself on aStream

Usage example(s):

self new printOn:Transcript

 setName: aString