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: 1.49 date: 2019/07/31 15:10:23

user: cg

file: AssignmentNode.st directory: libcomp

module: stx stc-classLibrary: libcomp

Author:

Claus Gittinger

Description:

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

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

 messagesDo: aBlock

evaluate aBlock for each message-node here and in subnodes

 nodeDo: anEnumerator

helper for parse tree walking

 evaluateIn: anEnvironment

 printOn: aStream indent: i

 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)