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improve fast returns of find and rfind (#18127)

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n5m
2021-05-31 09:20:15 +00:00
committed by GitHub
parent 18b4774311
commit 064fe18de6
2 changed files with 31 additions and 1 deletions
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28
tests/stdlib/tstrutils.nim
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@@ -243,6 +243,34 @@ template main() =
doAssert "/1/2/3".rfind('/', last=1) == 0
doAssert "/1/2/3".rfind('0') == -1
block:
const haystack: string = "ABCABABABABCAB"
doAssert haystack.len == 14
doAssert haystack.rfind("ABC") == 9
doAssert haystack.rfind("ABC", last=13) == 9
doAssert haystack.rfind("ABC", last=12) == 9
doAssert haystack.rfind("ABC", last=11) == 9
doAssert haystack.rfind("ABC", last=10) == 0
doAssert haystack.rfind("ABC", start=0) == 9
doAssert haystack.rfind("ABC", start=1) == 9
doAssert haystack.rfind("ABC", start=2) == 9
doAssert haystack.rfind("ABC", start=9) == 9
doAssert haystack.rfind("ABC", start=10) == -1
doAssert haystack.rfind("ABC", start=11) == -1
doAssert haystack.rfind("ABC", start=12) == -1
doAssert haystack.rfind("ABC", start=0, last=13) == 9
doAssert haystack.rfind("ABC", start=0, last=12) == 9
doAssert haystack.rfind("ABC", start=0, last=11) == 9
doAssert haystack.rfind("ABC", start=0, last=10) == 0
doAssert haystack.rfind("ABC", start=1, last=10) == -1
doAssert "".rfind("/") == -1
doAssert "/".rfind("/") == 0
doAssert "/".rfind("//") == -1
doAssert "///".rfind("//", start=3) == -1
block: # trimZeros
var x = "1200"
x.trimZeros()