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Add support for negative array indexes

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Ricard Bejarano 2024-10-23 18:43:02 +02:00 committed by GitHub
parent 2b4d7535f5
commit 47762a99bb
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1 changed files with 4 additions and 1 deletions
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value.go
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@ -294,7 +294,10 @@ func (arr *valueArray) index(i *interpreter, index int) (value, error) {
if 0 <= index && index < arr.length() { if 0 <= index && index < arr.length() {
return i.evaluatePV(arr.elements[index]) return i.evaluatePV(arr.elements[index])
} }
return nil, i.Error(fmt.Sprintf("Index %d out of bounds, not within [0, %v)", index, arr.length())) if -arr.length() <= index && index < 0 {
return i.evaluatePV(arr.elements[index + arr.length()])
}
return nil, i.Error(fmt.Sprintf("Index %d out of bounds, not within [%v, %v)", index, -arr.length(), arr.length()))
} }
func (arr *valueArray) length() int { func (arr *valueArray) length() int {