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"{ Package: 'stx:goodies/petitparser' }"
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PPCompositeParser subclass:#PPArithmeticParser
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instanceVariableNames:'terms addition factors multiplication power primary parentheses
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number'
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classVariableNames:''
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poolDictionaries:''
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category:'PetitTests-Examples'
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!
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!PPArithmeticParser methodsFor:'accessing'!
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start
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^ terms end
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! !
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!PPArithmeticParser methodsFor:'grammar'!
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addition
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183
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^ (factors separatedBy: ($+ asParser / $- asParser) trim)
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foldLeft: [ :a :op :b | a perform: op asSymbol with: b ]
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!
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factors
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^ multiplication / power
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!
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multiplication
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183
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^ (power separatedBy: ($* asParser / $/ asParser) trim)
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foldLeft: [ :a :op :b | a perform: op asSymbol with: b ]
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!
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number
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^ ($- asParser optional , #digit asParser plus , ($. asParser , #digit asParser plus) optional) flatten trim
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==> [ :value | value asNumber ]
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!
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parentheses
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183
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^ $( asParser trim , terms , $) asParser trim
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==> [ :nodes | nodes second ]
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!
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power
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183
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^ (primary separatedBy: $^ asParser trim)
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foldRight: [ :a :op :b | a raisedTo: b ]
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!
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primary
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^ number / parentheses
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terms
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^ addition / factors
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! !
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!PPArithmeticParser class methodsFor:'documentation'!
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31
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version
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183
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^ '$Header: /cvs/stx/stx/goodies/petitparser/PPArithmeticParser.st,v 1.4 2014-03-04 14:33:59 cg Exp $'
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!
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version_CVS
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183
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^ '$Header: /cvs/stx/stx/goodies/petitparser/PPArithmeticParser.st,v 1.4 2014-03-04 14:33:59 cg Exp $'
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!
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version_SVN
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^ '$Id: PPArithmeticParser.st,v 1.4 2014-03-04 14:33:59 cg Exp $'
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! !
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183
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