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Added guard clause for seting readstream position, when not changed. #615

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Mar 18, 2024
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Added guard clause for seting readstream position, when not changed. #615

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13 changes: 13 additions & 0 deletions dev/src/ExercismTools/TonelParser.extension.st
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Original file line number Diff line number Diff line change
Expand Up @@ -5,3 +5,16 @@ TonelParser >> documentFrom: aString [
self stream: aString readStream.
^self document
]

{ #category : #'*ExercismTools' }
TonelParser >> try: aBlock onSuccess: successBlock onFailure: failureBlock [
| pos |

pos := stream position.
[ ^ successBlock value: aBlock value ]
on: TonelParseError
do: [ :e |
stream position > pos ifTrue: [stream position: pos].
^ failureBlock value ].

]