PPStartOfLogicalLineParser.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Tue, 16 Jun 2015 06:45:26 +0100
changeset 489 0ca7a70db0f5
parent 427 a7f5e6de19d2
permissions -rw-r--r--
Fix in codegen for inlined sequence nodes. For inlined sequence nodes, generate nested ifs rather than sequential code which does not work when inlined. The reason is that #codeReturn: in inline generates instvar assignment, not method return, so in sequential code the next child of a sequence will be probed even if previous failed. If that happends, the whole sequence fail and therefore we must generate nested ifs to correctly handle this w.r.t. inlining.
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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