PPStartOfLogicalLineParser.st
author Patrik Svestka <patrik.svestka@gmail.com>
Wed, 14 Nov 2018 13:01:14 +0100
changeset 642 77d5fddb6462
parent 427 a7f5e6de19d2
permissions -rw-r--r--
Issue #239: Fix all Smalltak/X source files to be in unicode (UTF8 without BOM) and prefixed by "{ Encoding: utf8 }" when any unicode character is present - All source *.st files are now Unicode UTF8 without BOM Files are in two groups (fileOut works this way in Smalltalk/X): - containing a unicode character have "{ Encoding: utf8 }" at the header - ASCII only are without the header

"{ 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 ].
	]
! !