| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687 |
- Smalltalk createPackage: 'Lyst'!
- Object subclass: #Lyst
- instanceVariableNames: ''
- package: 'Lyst'!
- !Lyst class methodsFor: 'parsing'!
- parse: message
- | result stack anArray |
- anArray := message tokenize: ' '.
- result := #().
- stack := { result }.
- anArray do: [ :each |
- | asNum inner close |
- close := 0.
- inner := each.
- [ inner notEmpty and: [ inner first = '(' ]] whileTrue: [ inner := inner allButFirst. stack add: (stack last add: #()) ].
- [ inner notEmpty and: [ inner last = ')' ]] whileTrue: [ inner := inner allButLast. close := close + 1 ].
- (inner notEmpty and: [ inner first = '#' ]) ifTrue: [ inner := { inner allButFirst } ].
- asNum := inner isString ifTrue: [ (inner ifEmpty: [ 'NaN' ]) asNumber ] ifFalse: [ inner ].
- asNum = asNum ifTrue: [ stack last add: asNum ] ifFalse: [
- inner ifNotEmpty: [ stack last add: inner ] ].
- close timesRepeat: [ stack removeLast ] ].
- ^ result
- ! !
- !Array methodsFor: '*Lyst'!
- atYndexIn: anObject ifAbsent: aBlock
- | selector |
- selector := self first.
- (anObject respondsTo: selector)
- ifTrue: [ ^ anObject perform: selector ]
- ifFalse: aBlock
- !
- atYndexIn: anObject ifAbsent: aBlock put: anotherObject
- | selector |
- selector := self first asMutator.
- (anObject respondsTo: selector)
- ifTrue: [ ^ anObject perform: selector withArguments: { anotherObject } ]
- ifFalse: aBlock
- ! !
- !Number methodsFor: '*Lyst'!
- atYndexIn: anObject ifAbsent: aBlock
- (anObject respondsTo: #at:ifAbsent:)
- ifTrue: [ ^ anObject at: self ifAbsent: aBlock ]
- ifFalse: aBlock
- !
- atYndexIn: anObject ifAbsent: aBlock put: anotherObject
- (anObject respondsTo: #at:put:)
- ifTrue: [ ^ anObject at: self put: anotherObject ]
- ifFalse: aBlock
- ! !
- !Object methodsFor: '*Lyst'!
- atLyst: aCollection ifAbsent: aBlock
- ^ aCollection inject: self into: [ :soFar :segment |
- segment atYndexIn: soFar ifAbsent: [ ^ aBlock value ]]
- !
- atYndexIn: anObject ifAbsent: aBlock
- ^ aBlock value
- !
- atYndexIn: anObject ifAbsent: aBlock put: anotherObject
- ^ aBlock value
- ! !
- !String methodsFor: '*Lyst'!
- atYndexIn: anObject ifAbsent: aBlock
- (anObject respondsTo: #at:ifAbsent:)
- ifTrue: [ ^ anObject at: self ifAbsent: aBlock ]
- ifFalse: aBlock
- !
- atYndexIn: anObject ifAbsent: aBlock put: anotherObject
- (anObject respondsTo: #at:put:)
- ifTrue: [ ^ anObject at: self put: anotherObject ]
- ifFalse: aBlock
- ! !
|
