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.
20 lines
661 B
Text
20 lines
661 B
Text
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#eval ("abc" ++ "cde").length
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#eval ("abcd".mkIterator.nextn 2).remainingToString
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#eval ("abcd".mkIterator.nextn 10).remainingToString
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#eval "αβ".length
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#eval "αβcc".mkIterator.pos
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#eval "αβcc".mkIterator.next.pos
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#eval "αβcc".mkIterator.next.next.pos
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#eval "αβcc".mkIterator.next.setCurr 'a'
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#eval "αβcd".mkIterator.toEnd.pos
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#eval "012".splitOn "12"
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#eval "007".splitOn "07"
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#eval "ababcab".splitOn "abc"
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#eval "αbαbcαbcαααbcα".splitOn "αb"
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#eval "αbαbcαbcαααbcα".splitOn "αbcα"
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#eval "here is some text ".splitOn
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#eval "here is some text ".splitOn "some"
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#eval "here is some text ".splitOn ""
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#eval "ababacabac".splitOn "aba"
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