8d47bf1822* produce better code for closure environment creation * new 'first write' analysis; * scope based move analyser * code cleanup Co-authored-by: ringabout <43030857+ringabout@users.noreply.github.com>
55 lines
1.1 KiB
Nim
55 lines
1.1 KiB
Nim
discard """
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errormsg: "'=copy' is not available for type <Foo>; requires a copy because it's not the last read of 'otherTree'"
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file: "tprevent_assign2.nim"
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line: 48
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"""
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type
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Foo = object
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x: int
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proc `=destroy`(f: var Foo) = f.x = 0
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proc `=`(a: var Foo; b: Foo) {.error.} # = a.x = b.x
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proc `=sink`(a: var Foo; b: Foo) = a.x = b.x
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proc createTree(x: int): Foo =
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Foo(x: x)
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proc take2(a, b: sink Foo) =
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echo a.x, " ", b.x
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when false:
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var otherTree: Foo
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try:
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for i in 0..3:
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while true:
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#if i == 0:
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otherTree = createTree(44)
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case i
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of 0:
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echo otherTree
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take2(createTree(34), otherTree)
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of 1:
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take2(createTree(34), otherTree)
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else:
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discard
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finally:
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discard
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proc preventThis() =
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var otherTree: Foo
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for i in 0..3:
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while true:
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if i == 0:
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otherTree = createTree(44)
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case i
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of 0:
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echo otherTree
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take2(createTree(34), otherTree)
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of 1:
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take2(createTree(34), otherTree)
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else:
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discard
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#allowThis()
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preventThis()
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