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Arithmetic evaluation: Difference between revisions
→{{header|Elena}}
m (→{{header|Sidef}}: code simplifications) |
|||
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=={{header|Elena}}==
<lang elena>#define system.
#define system'routines.
#define extensions.
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#method level = theLevel.
#method append
[
theValue += aChar.
]
#method number =
}
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#method number = theLeft number - theRight number.
}
// --- ProductNode ---▼
#class ProductNode :: Node
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#method number => theTop.
}
#symbol operatorState = (:ch)
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]
! [
self new &token append
].
].
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]
! [
self append
].
].
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]
! [
self new &token append
].
].
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]
#method append
[
((ch >= 48) and:(ch < 58))
? [ theToken append
! [ #throw InvalidArgumentException new &message:"Invalid expression". ].
]
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#method append &literal:aLiteral
[
]
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#method append &last:aLastNode &new:aNewNode
[
($nil == aLastNode)
? [ ^ aNewNode. ].
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#var aParent := aLastNode.
#var aCurrent := aLastNode right.
#loop ((
[ aParent := aCurrent. aCurrent := aCurrent right. ].
($nil == aCurrent)
? [ aParent set &right:aNewNode. ]
! [ aNewNode set &left:aCurrent. aParent set &right:aNewNode. ].
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#var aScope := Scope new &parser:$self.
^ aScope number.
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#var aParser := Parser new.
[
| if &Error:e [
].
].
| |||