"{ Package: 'stx:goodies/petitparser/compiler' }"
"{ NameSpace: Smalltalk }"
PPCCodeGenerator subclass:#PPCTokenCodeGenerator
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'PetitCompiler-Visitors'
!
!PPCTokenCodeGenerator methodsFor:'as yet unclassified'!
afterAccept: node retval: retval
| return |
return := super afterAccept: node retval: retval.
return category: 'generated - tokens'.
^ return
!
fromTokenMode
compiler rememberStrategy: (PPCCompilerTokenizingRememberStrategy on: compiler).
compiler errorStrategy: (PPCCompilerTokenizingErrorStrategy on: compiler).
!
toTokenMode
compiler rememberStrategy: (PPCCompilerTokenRememberStrategy on: compiler).
compiler errorStrategy: (PPCCompilerTokenErrorStrategy on: compiler).
! !
!PPCTokenCodeGenerator methodsFor:'visiting'!
visitOptionalNode: node
compiler
codeAssignParsedValueOf:[ self visit:node child ]
to:self retvalVar.
compiler codeAssign: 'false.' to: 'error'.
compiler codeReturn.
!
visitTokenNode: node
| id startVar endVar |
"Tokens cannot be inlined,
- their result is true/false
- the return value is always stored in currentTokenValue
- the current token type is always stored in currentTokenType
"
self assert: node isMarkedForInline not.
startVar := compiler allocateTemporaryVariableNamed: 'start'.
endVar := compiler allocateTemporaryVariableNamed: 'end'.
id := compiler idFor: node.
self toTokenMode.
compiler add: 'currentTokenType isNil ifFalse: [ ^ currentTokenType == ', id storeString, '].'.
compiler profileTokenRead: id.
node allNodes size > 2 ifTrue: [
self addGuard: node ifTrue: nil ifFalse: [ compiler addOnLine: '^ false' ].
].
compiler codeAssign: 'context position + 1.' to: startVar.
compiler codeAssignParsedValueOf:[ self visit:node child ] to:#whatever.
compiler add: 'error ifTrue: [ ^ error := false ].'.
compiler codeAssign: 'context position.' to: endVar.
compiler codeTranscriptShow: 'current token type: ', id storeString.
compiler codeAssign: id storeString, '.' to: 'currentTokenType'.
compiler codeAssign: node tokenClass asString, ' on: (context collection)
start: ', startVar, '
stop: ', endVar, '
value: nil.'
to: 'currentTokenValue := ', self retvalVar.
compiler codeClearError.
compiler add: '^ true'.
self fromTokenMode.
!
visitTrimmingTokenCharacterNode: node
| id |
"Tokens cannot be inlined,
- their result is true/false
- the return value is always stored in currentTokenValue
- the current token type is always stored in currentTokenType
"
self assert: node isMarkedForInline not.
id := compiler idFor: node.
self toTokenMode.
compiler add: 'currentTokenType isNil ifFalse: [ ^ currentTokenType == ', id storeString, '].'.
compiler profileTokenRead: id.
self addGuard: node ifTrue: nil ifFalse: [ compiler addOnLine: ' ^ false' ].
compiler add: 'context next.'.
compiler codeTranscriptShow: 'current token type: ', id storeString.
compiler codeAssign: id storeString, '.' to: 'currentTokenType'.
compiler codeAssign: node tokenClass asString, ' on: (context collection)
start: context position
stop: context position
value: nil.'
to: 'currentTokenValue := ', self retvalVar.
compiler addComment: 'Consume Whitespace:'.
compiler
codeAssignParsedValueOf:[ self visit:node whitespace ]
to:#whatever.
compiler nl.
compiler add: '^ true'.
self fromTokenMode.
!
visitTrimmingTokenNode: node
| id startVar endVar |
"Tokens cannot be inlined,
- their result is true/false
- the return value is always stored in currentTokenValue
- the current token type is always stored in currentTokenType
"
self assert: node isMarkedForInline not.
startVar := compiler allocateTemporaryVariableNamed: 'start'.
endVar := compiler allocateTemporaryVariableNamed: 'end'.
id := compiler idFor: node.
self toTokenMode.
compiler add: 'currentTokenType isNil ifFalse: [ ^ currentTokenType == ', id storeString, '].'.
compiler profileTokenRead: id.
node allNodes size > 2 ifTrue: [
self addGuard: node ifTrue: nil ifFalse: [ compiler addOnLine: '^ false' ].
].
compiler codeAssign: 'context position + 1.' to: startVar.
compiler codeAssignParsedValueOf:[ self visit:node child ] to:#whatever.
compiler add: 'error ifTrue: [ ^ error := false ].'.
compiler codeAssign: 'context position.' to: endVar.
compiler addComment: 'Consume Whitespace:'.
compiler
codeAssignParsedValueOf:[ self visit:node whitespace ]
to:#whatever.
compiler nl.
compiler codeTranscriptShow: 'current token type: ', id storeString.
compiler codeAssign: id storeString, '.' to: 'currentTokenType'.
compiler codeAssign: node tokenClass asString, ' on: (context collection)
start: ', startVar, '
stop: ', endVar, '
value: nil.'
to: 'currentTokenValue := ', self retvalVar.
compiler codeClearError.
compiler add: '^ true'.
self fromTokenMode.
! !
!PPCTokenCodeGenerator class methodsFor:'documentation'!
version_HG
^ '$Changeset: <not expanded> $'
! !