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9e1b170a09
fixes #16771 follow up https://github.com/nim-lang/Nim/pull/16536 Ideally it should be handled in the IR part in the future I have also checked the double evaluation of `swap` in the JS runtime https://github.com/nim-lang/Nim/issues/16779, that might be solved by a copy flag or something. Well, it should be best solved in the IR so that it doesn't bother backends anymore.
40 lines
551 B
Nim
40 lines
551 B
Nim
discard """
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matrix: "--mm:refc; --mm:orc"
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targets: "c cpp js"
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"""
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import std/assertions
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# bug #20227
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type
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Data = object
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id: int
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Test = distinct Data
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Object = object
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data: Test
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var x: Object = Object(data: Test(Data(id: 12)))
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doAssert Data(x.data).id == 12
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block: # bug #16771
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type A = object
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n: int
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proc foo(a, b: var A) =
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swap a, b
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var a, b: A
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a.n = 42
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b.n = 1
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doAssert a.n == 42
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doAssert b.n == 1
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a.swap b
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doAssert a.n == 1
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doAssert b.n == 42
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a.foo b
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doAssert a.n == 42
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doAssert b.n == 1
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