Class: ReturnNode

• Inheritance
• Description
• Instance protocol
  • accessing
  • checks
  • code generation
  • enumerating
  • enumeration
  • evaluation
  • printing & storing
  • queries
  • visiting

Inheritance:

   Object
   |
   +--ParseNode
      |
      +--StatementNode
         |
         +--ReturnNode
            |
            +--JavaScriptParser::JavaScriptReturnNode

Package:

stx:libcomp

Category:

System-Compiler-Support

Version:

rev: 1.51 date: 2023/06/04 09:30:13

user: cg

file: ReturnNode.st directory: libcomp

module: stx stc-classLibrary: libcomp

Description:

node for parse-trees, representing return expressions
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.

Instance protocol:

 expression: e

any block, which is returned cannot be inlined.

 home

 home: someOne blockHome: aBlockNode

 lineNumber: something

set lineNr

 plausibilityCheckIn: aParser

check for return-in-return, as in
^ foo ifTrue:[ ^x]
that is (currently) not compilable by stc (generates bad C-code for it).
TODO: rewite to use lint/lint rules and apply them before accepting

 basicCodeOn: aStream inBlock: b for: aCompiler

Transcript showCR:'====> %1 [%2]' with:lineNr with:expression printString.

 codeForSideEffectOn: aStream inBlock: b for: aCompiler

redefined - drop not needed since notreached

 codeForSimpleReturnOn: aStream inBlock: b lineNumber: lineNrOrNil for: aCompiler

generate code to return myself as a simple method return

 codeLocalReturnOn: aStream inBlock: b for: aCompiler

 codeOn: aStream inBlock: b for: aCompiler

aCompiler parserFlags allowPossibleSTCCompilationProblems ifFalse:[

 nodeDo: anEnumerator

helper for parse tree walking

 childrenDo: aBlock

 evaluateExpressionIn: anEnvironment

when we arrive here, the parser context is already gone
- try block-return

 printOn: aStream indent: i

 isJavaScriptReturnNode

 isReturnNode

 isSimpleConstant

 isSimpleExpression

 isSimpleVariable

 acceptVisitor: aVisitor

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