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https://github.com/nim-lang/Nim.git
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f052e251be
* fix #15958
* also cover openArray and VarArgs
* more tests
* cover even more types
* cover even more types
* Trigger build
* Trigger build
* cover sets passed as arrays
(cherry picked from commit fcb2ec4ed6)
56 lines
1.2 KiB
Nim
56 lines
1.2 KiB
Nim
discard """
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targets: "c cpp"
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output: "1"
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"""
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proc viewInto(a: array[4, string]): lent string =
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result = a[0]
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proc passToVar(x: var string) =
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discard
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proc main =
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let x = ["1", "2", "3", "4"]
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echo viewInto(x)
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doAssert(not compiles(passToVar(viewInto(x))))
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main()
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#------------------------------------------------------------------------------
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# issue #15958
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block:
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proc byLent[T](a: T): lent T = a
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let a = [11,12]
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let b = @[21,23]
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let ss = {1, 2, 3, 5}
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doAssert byLent(a) == [11,12]
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doAssert byLent(a).unsafeAddr == a.unsafeAddr
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doAssert byLent(b) == @[21,23]
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doAssert byLent(b).unsafeAddr == b.unsafeAddr
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doAssert byLent(ss) == {1, 2, 3, 5}
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doAssert byLent(ss).unsafeAddr == ss.unsafeAddr
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let r = new(float)
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r[] = 10.0
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doAssert byLent(r)[] == 10.0
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let p = create(float)
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p[] = 20.0
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doAssert byLent(p)[] == 20.0
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proc byLent2[T](a: openarray[T]): lent T = a[0]
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doAssert byLent2(a) == 11
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doAssert byLent2(a).unsafeAddr == a[0].unsafeAddr
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doAssert byLent2(b) == 21
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doAssert byLent2(b).unsafeAddr == b[0].unsafeAddr
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proc byLent3[T](a: varargs[T]): lent T = a[1]
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let
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x = 10
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y = 20
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z = 30
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doAssert byLent3(x, y, z) == 20
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