PPStartOfLogicalLineParser.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Mon, 17 Aug 2015 12:13:16 +0100
changeset 515 b5316ef15274
parent 427 a7f5e6de19d2
permissions -rw-r--r--
Updated to PetitCompiler-JanKurs.160, PetitCompiler-Tests-JanKurs.112, PetitCompiler-Extras-Tests-JanKurs.25, PetitCompiler-Benchmarks-JanKurs.17 Name: PetitCompiler-JanKurs.160 Author: JanKurs Time: 17-08-2015, 09:52:26.291 AM UUID: 3b4bfc98-8098-4951-af83-a59e2585b121 Name: PetitCompiler-Tests-JanKurs.112 Author: JanKurs Time: 16-08-2015, 05:00:32.936 PM UUID: 85613d47-08f3-406f-9823-9cdab451e805 Name: PetitCompiler-Extras-Tests-JanKurs.25 Author: JanKurs Time: 16-08-2015, 05:00:10.328 PM UUID: 09731810-51a1-4151-8d3a-56b636fbd1f7 Name: PetitCompiler-Benchmarks-JanKurs.17 Author: JanKurs Time: 05-08-2015, 05:29:32.407 PM UUID: e544b5f1-bcf8-470b-93a6-d2363e4dfc8a

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

"{ NameSpace: Smalltalk }"

PPParser subclass:#PPStartOfLogicalLineParser
	instanceVariableNames:''
	classVariableNames:''
	poolDictionaries:''
	category:'PetitParser-Parsers'
!

!PPStartOfLogicalLineParser methodsFor:'as yet unclassified'!

isBlank: character
	^ (character == Character space or: [character == Character tab])
!

parseOn: aPPContext
	aPPContext peek isAlphaNumeric ifFalse: [ 
		^ PPFailure message: 'Start of logical line expected' context: aPPContext 
	].

	aPPContext isStartOfLine ifTrue: [ ^ #startOfLogicalLine ].
	
	
	[ aPPContext position ~= 0 ] whileTrue: [  
		aPPContext back.
		(self isBlank: aPPContext peek) ifFalse: [ 
			^ PPFailure message: 'Start of logical line expected' context: aPPContext
		].
		aPPContext isStartOfLine ifTrue: [ ^ #startOfLogicalLine ].
	]
! !