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Issue #543 : string.match returns nil when there is no match #544

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Issue #543 : string.match returns nil when there is no match #544

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6 changes: 6 additions & 0 deletions _glua-tests/strings.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -11,3 +11,9 @@ assert(ret1 == 1)
assert(ret2 == 3)
assert(ret3 == "aaa")
assert(ret4 == 4)

-- issue #543: string.match returns nil when there is no match
assert(select("#", ("abc"):match("(%d+)")) == 1)
assert(("abc"):match("(%d+)") == nil)
assert(tonumber(("abc"):match("(%d+)")) == nil)
assert(select("#", string.match("abc", "%d")) == 1)
2 changes: 1 addition & 1 deletion stringlib.go
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Original file line number Diff line number Diff line change
Expand Up @@ -369,7 +369,7 @@ func strMatch(L *LState) int {
}
if len(mds) == 0 {
L.Push(LNil)
return 0
return 1
}
md := mds[0]
nsubs := md.CaptureLength() / 2
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