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fix #16555, fixes #16405: len, high honors '\0' for cstring in vm (#16610)

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Timothee Cour 2021-01-11 01:16:20 -08:00 • committed by GitHub
commit f6c2450cdb
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6 changed files with 74 additions and 15 deletions
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34
tests/stdlib/tstring.nim
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@ -96,11 +96,43 @@ func reverse*(a: string): string =
proc main() =
# xxx put all tests here to test in VM and RT
test_string_slice()
test_string_cmp()
tester(1)
doAssert reverse("hello") == "olleh"
block: # reverse
doAssert reverse("hello") == "olleh"
block: # len, high
var a = "ab\0cd"
var b = a.cstring
doAssert a.len == 5
block: # bug #16405
when defined(js):
when nimvm: doAssert b.len == 2
else: doAssert b.len == 5
else: doAssert b.len == 2
doAssert a.high == a.len - 1
doAssert b.high == b.len - 1
doAssert "".len == 0
doAssert "".high == -1
doAssert "".cstring.len == 0
doAssert "".cstring.high == -1
var c: cstring = nil
template impl() =
doAssert c.len == 0
doAssert c.high == -1
when defined js:
when nimvm: impl()
else:
# xxx pending bug #16674
discard
else: impl()
static: main()
main()