PPStartOfLogicalLineParser.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Mon, 24 Aug 2015 15:34:14 +0100
changeset 524 f6f68d32de73
parent 427 a7f5e6de19d2
permissions -rw-r--r--
Merged in PetitCompiler-JanVrany.170, PetitCompiler-Tests-JanKurs.116, PetitCompiler-Extras-Tests-JanKurs.29, PetitCompiler-Benchmarks-JanKurs.19 Name: PetitCompiler-JanVrany.170 Author: JanVrany Time: 24-08-2015, 03:19:51.340 PM UUID: c20a744f-3b41-4aaa-bb8a-71ce74a2a952 Name: PetitCompiler-Tests-JanKurs.116 Author: JanKurs Time: 24-08-2015, 11:37:54.332 AM UUID: 549e0927-358a-4a1b-8270-050ccfcb4217 Name: PetitCompiler-Extras-Tests-JanKurs.29 Author: JanKurs Time: 24-08-2015, 11:36:52.503 AM UUID: ea1dbb67-f884-4237-8f34-adb0677c0954 Name: PetitCompiler-Benchmarks-JanKurs.19 Author: JanKurs Time: 24-08-2015, 11:48:47.045 AM UUID: 1c342fdb-8ddd-4104-9c47-a8f589c51694

"{ 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 ].
	]
! !