Class: AssignmentNode

• Inheritance
• Description
• Class protocol
  • instance creation
• Instance protocol
  • accessing
  • code generation
  • enumerating
  • evaluation
  • printing & storing
  • queries
  • testing
  • visiting

Inheritance:

   Object
   |
   +--ParseNode
      |
      +--AssignmentNode
         |
         +--JavaScriptParser::JavaScriptAssignmentNode

Package:

stx:libcomp

Category:

System-Compiler-Support

Version:

rev: 1.53 date: 2021/02/15 21:33:05

user: cg

file: AssignmentNode.st directory: libcomp

module: stx stc-classLibrary: libcomp

Description:

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

copyright
COPYRIGHT (c) 1989 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:

 variable: v expression: e

Instance protocol:

 endCharPosition

 endCharPosition: something

 endLineNr

 endLineNr: something

 expression

 expression: something

 lineNr

 lineNr: something

 lineNumber

return lineNr

 lineNumber: something

set lineNr

 variable

 variable: something

 variable: v expression: e

any block, which gets assigned to something

 checkIncDecOn: aStream

check if we can use incMvar / decMvar instruction.
If so, code it and return true.
Otherwise, return false.

 codeForSideEffectOn: aStream inBlock: b for: aCompiler

(comment from inherited method)
generate code for this statement - value not needed

 codeNormalOn: aStream valueNeeded: forValue inBlock: b for: aCompiler

must do workspace variables here, because these

 codeOn: aStream inBlock: b for: aCompiler

 allSubNodesDo: aBlock

(comment from inherited method)
self subclassResponsibility.

 childrenDo: aBlock

 messagesDo: aBlock

evaluate aBlock for each message-node here and in subnodes

 nodeDo: anEnumerator

helper for parse tree walking

 variableNodesDo: aBlock

evaluate aBlock for each variable-node in this node and subnodes

 evaluateIn: anEnvironment

 printOn: aStream indent: i

(comment from inherited method)
append a user printed representation of the receiver to aStream.
The format is suitable for a human - not meant to be read back.

 printOperatorOn: aStream

 collectBlocksInto: aCollection

 evaluatesToConstant

return true, if this is a node for an assignment

 precedence

 withConstantValueDo: aBlock

return true, if this evaluates to a constant value
and evaluate aBlock with it

 isAssignment

return true, if this is a node for an assignment

 acceptVisitor: aVisitor

Double dispatch back to the visitor, passing my type encoded in
the selector (visitor pattern)