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"{ Package: 'stx:goodies/petitparser' }"
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0
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PPArithmeticParserTest subclass:#PPExpressionParserTest
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instanceVariableNames:''
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classVariableNames:''
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poolDictionaries:''
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category:'PetitTests-Tests'
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!
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!PPExpressionParserTest class methodsFor:'testing'!
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shouldInheritSelectors
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^ true
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! !
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!PPExpressionParserTest methodsFor:'accessing'!
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parserInstance
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| expression parens number |
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expression := PPExpressionParser new.
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parens := $( asParser token trim , expression , $) asParser token trim
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==> [ :nodes | nodes second ].
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number := (#digit asParser plus , ($. asParser , #digit asParser plus) optional) token trim
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==> [ :token | token value asNumber ].
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expression term: parens / number.
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expression
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group: [ :g |
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g prefix: $- asParser token trim do: [ :op :a | a negated ] ];
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group: [ :g |
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g postfix: '++' asParser token trim do: [ :a :op | a + 1 ].
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g postfix: '--' asParser token trim do: [ :a :op | a - 1 ] ];
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group: [ :g |
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g right: $^ asParser token trim do: [ :a :op :b | a raisedTo: b ] ];
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group: [ :g |
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g left: $* asParser token trim do: [ :a :op :b | a * b ].
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g left: $/ asParser token trim do: [ :a :op :b | a / b ] ];
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group: [ :g |
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g left: $+ asParser token trim do: [ :a :op :b | a + b ].
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g left: $- asParser token trim do: [ :a :op :b | a - b ] ].
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^ expression end
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! !
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!PPExpressionParserTest methodsFor:'testing'!
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testPostfixAdd
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self assert: '0++' is: 1.
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self assert: '0++++' is: 2.
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self assert: '0++++++' is: 3.
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self assert: '0+++1' is: 2.
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self assert: '0+++++1' is: 3.
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self assert: '0+++++++1' is: 4
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!
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testPostfixSub
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self assert: '1--' is: 0.
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self assert: '2----' is: 0.
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self assert: '3------' is: 0.
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self assert: '2---1' is: 0.
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self assert: '3-----1' is: 0.
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self assert: '4-------1' is: 0.
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!
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testPrefixNegate
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self assert: '1' is: 1.
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self assert: '-1' is: -1.
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self assert: '--1' is: 1.
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self assert: '---1' is: -1
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! !
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!PPExpressionParserTest class methodsFor:'documentation'!
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74 |
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13
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version
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^ '$Header: /cvs/stx/stx/goodies/petitparser/PPExpressionParserTest.st,v 1.3 2012-05-04 21:59:27 vrany Exp $'
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!
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version_CVS
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^ '$Header: /cvs/stx/stx/goodies/petitparser/PPExpressionParserTest.st,v 1.3 2012-05-04 21:59:27 vrany Exp $'
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!
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82 |
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0
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version_SVN
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13
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^ '§Id: PPExpressionParserTest.st 4 2010-12-18 17:02:23Z kursjan §'
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! !
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