e41cd310e9
Fixes #3829. As reported on Zulip (both [recently](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/current.20definition.20of.20.60String.2EsplitOn.60.20is.20incorrect/near/430930535) and [a year ago](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/should.20we.20redefine.20.60String.2EsplitOnAux.60.3F/near/365899332)), `String.splitOn` has a bug when dealing with separators of more than one character (which are luckily rare). The code change here is very small, replacing a `i` with `i - j`, but it makes termination more complex so that's where the rest of the line count goes.
18 lines
307 B
Text
18 lines
307 B
Text
6
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"cd"
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""
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2
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{ byteIdx := 0 }
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{ byteIdx := 2 }
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{ byteIdx := 4 }
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String.Iterator.mk "αacc" { byteIdx := 2 }
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{ byteIdx := 6 }
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["0", ""]
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["0", ""]
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["ab", "ab"]
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["", "", "c", "cαα", "cα"]
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["αb", "bcαα", ""]
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["here", "is", "some", "text", ""]
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["here is ", " text "]
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["here is some text "]
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["", "bac", "c"]
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