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

PPCAbstractPredicateNode subclass:#PPCPredicateNode

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	category:'PetitCompiler-Nodes'

!

!PPCPredicateNode methodsFor:'as yet unclassified'!

bodyOfPredicate: compiler

	| id |

	id := (compiler idFor: predicate prefixed: #predicate).

	compiler addConstant: predicate as: id.

	compiler addOnLine: '(context atEnd not and: [ ', id , ' value: context uncheckedPeek])'.

	compiler indent.

	compiler add: 'ifFalse: [ self error: ''predicate not found'' ]'.

	compiler add: 'ifTrue: [ context next ].'.

	compiler dedent.	

!

rewrite: changeStatus

	| charSet |

	(predicate class == PPCharSetPredicate) ifTrue: [ 

		charSet := predicate.

	].

	charSet := PPCharSetPredicate on: predicate.

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

		changeStatus change.

		^ PPCMessagePredicateNode new

			name: name;

			message: #isLetter;

			predicate: predicate;

			yourself

	].

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

		changeStatus change.

		^ PPCMessagePredicateNode new

			name: name;

			message: #isDigit;

			predicate: predicate;

			yourself

	].

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

		changeStatus change.

		^ PPCMessagePredicateNode new

			name: name;

			message: #isAlphaNumeric;

			predicate: predicate;

			yourself

	].

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

		changeStatus change.

		^ PPCMessagePredicateNode new

			name: name;

			message: #isSeparator;

			predicate: predicate;

			yourself

	].

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

		changeStatus change.

		^ PPCAnyNode new

			name: name;

			yourself

	].

	changeStatus change.

	^ PPCCharSetPredicateNode new

		name: name;

		predicate: charSet;

		yourself.

! !