PPStartOfLogicalLineParser.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Tue, 16 Jun 2015 07:49:21 +0100
changeset 491 82b272c7dc37
parent 427 a7f5e6de19d2
permissions -rw-r--r--
Codegen: added support for smart action node compiling. Avoid creation of intermediate result collection for action nodes if all references to action block's argument (i.e., the nodes collection) is in form of: * <nodes> at: <numeric constant> * <nodes> first (second, third...
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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"{ Package: 'stx:goodies/petitparser' }"
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"{ NameSpace: Smalltalk }"
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PPParser subclass:#PPStartOfLogicalLineParser
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	instanceVariableNames:''
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	classVariableNames:''
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	poolDictionaries:''
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	category:'PetitParser-Parsers'
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!
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!PPStartOfLogicalLineParser methodsFor:'as yet unclassified'!
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isBlank: character
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	^ (character == Character space or: [character == Character tab])
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!
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parseOn: aPPContext
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	aPPContext peek isAlphaNumeric ifFalse: [ 
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		^ PPFailure message: 'Start of logical line expected' context: aPPContext 
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	].
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	aPPContext isStartOfLine ifTrue: [ ^ #startOfLogicalLine ].
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	[ aPPContext position ~= 0 ] whileTrue: [  
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		aPPContext back.
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		(self isBlank: aPPContext peek) ifFalse: [ 
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			^ PPFailure message: 'Start of logical line expected' context: aPPContext
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		].
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		aPPContext isStartOfLine ifTrue: [ ^ #startOfLogicalLine ].
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	]
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! !
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