"{ Package: 'stx:goodies/petitparser/compiler' }"

"{ NameSpace: Smalltalk }"

PPCRewritingVisitor subclass:#PPCSpecializingVisitor

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	category:'PetitCompiler-Visitors'

!

!PPCSpecializingVisitor methodsFor:'visiting'!

visitActionNode: node

    ("(node hasProperty: #trimmingToken) not and: [" node block isSymbol "]") ifTrue: [ 

        self change.

        ^ PPCSymbolActionNode new

            block: node block;

            name: node name;

            child: node child;

            yourself

    ].

    ^ super visitActionNode: node

!

visitForwardNode: node

    self visitChildren: node.

    node name ifNil: [ 

        self change.

        ^ node child.

    ].

    node child name ifNil: [  

        self change.

        node child name: node name.

        ^ node child

    ].

    (node child name = node name) ifTrue: [ 

        self change.

        ^ node child

    ].

    ^ node

!

visitNotNode: node

    self visitChildren: node.

    (node child isKindOf: PPCAbstractLiteralNode) ifTrue: [  

        self change.

        ^ PPCNotLiteralNode new

            name: node name;

            literal: node child literal;

            yourself

    ]. 

    (node child isKindOf: PPCMessagePredicateNode) ifTrue: [  

        self change.

        ^ PPCNotMessagePredicateNode new

            name: node name;

            message: node child message;

            yourself

    ].

    (node child isKindOf: PPCCharSetPredicateNode) ifTrue: [  

        self change.

        ^ PPCNotCharSetPredicateNode new

            name: node name;

            predicate: node child predicate;

            yourself

    ].

    (node child isKindOf: PPCCharacterNode) ifTrue: [  

        self change.

        ^ PPCNotCharacterNode new

            name: node name;

            character: node child character;

            yourself

    ].

    ^ node

    "Modified: / 23-04-2015 / 12:02:15 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

visitPredicateNode: node

    | charSet |

    (node predicate class == PPCharSetPredicate) ifTrue: [ 

        charSet := node predicate.

    ].

    charSet := PPCharSetPredicate on: node predicate.

    (charSet equals: (PPCharSetPredicate on: [ :char | char isLetter])) ifTrue: [ 

        change := true.

        ^ PPCMessagePredicateNode new

            name: node name;

            message: #isLetter;

            predicate: node predicate;

            yourself

    ].

    (charSet equals: (PPCharSetPredicate on: [ :char | char isDigit])) ifTrue: [ 

        change := true.

        ^ PPCMessagePredicateNode new

            name: node name;

            message: #isDigit;

            predicate: node predicate;

            yourself

    ].

    (charSet equals: (PPCharSetPredicate on: [ :char | char isAlphaNumeric])) ifTrue: [ 

        change := true.

        ^ PPCMessagePredicateNode new

            name: node name;

            message: #isAlphaNumeric;

            predicate: node predicate;

            yourself

    ].

    (charSet equals: (PPCharSetPredicate on: [ :char | char isSeparator])) ifTrue: [ 

        change := true.

        ^ PPCMessagePredicateNode new

            name: node name;

            message: #isSeparator;

            predicate: node predicate;

            yourself

    ].

    (charSet equals: (PPCharSetPredicate on: [ :char | true ])) ifTrue: [ 

        change := true.

        ^ PPCAnyNode new

            name: node name;

            yourself

    ].

    change := true.

    ^ PPCCharSetPredicateNode new

        name: node name;

        predicate: charSet;

        yourself.

!

visitStarNode: node

    self visitChildren: node.

    (node child isKindOf: PPCMessagePredicateNode) ifTrue: [ 

        self change.

        ^ PPCStarMessagePredicateNode new

            name: node name;

            child: node child;

            message: node child message;

            yourself

    ].

    (node child isKindOf: PPCAnyNode) ifTrue: [ 

        self change.

        ^ PPCStarAnyNode new

            name: node name;

            child: node child;

            yourself

    ]. 

    (node child isKindOf: PPCCharSetPredicateNode) ifTrue: [ 

        self change.

        ^ PPCStarCharSetPredicateNode new

            name: node name;

            predicate: node child predicate;

            child: node child;

            yourself

    ].

    ^ node

!

visitTrimmingTokenNode: node

    self visitChildren: node.

    (node child isKindOf: PPCCharacterNode) ifTrue: [ 

        self change.

        ^ PPCTrimmingCharacterTokenNode new

            whitespace: node whitespace;

            tokenClass: node tokenClass;

            yourself

    ].

    ^ node

! !