mirror of
https://github.com/nim-lang/Nim.git
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fb641483f0
* scope based destructors * handle 'or' and 'and' expressions properly, see the new test arc/tcontrolflow.nim * make this branch mergable, logic is disabled for now
157 lines
2.9 KiB
Nim
157 lines
2.9 KiB
Nim
discard """
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output: '''----
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myobj constructed
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myobj destroyed
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----
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mygeneric1 constructed
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mygeneric1 destroyed
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----
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mygeneric2 constructed
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mygeneric2 destroyed
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myobj destroyed
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----
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mygeneric3 constructed
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mygeneric1 destroyed
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----
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mydistinctObj constructed
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myobj destroyed
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mygeneric2 destroyed
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------------------
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----
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----
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myobj destroyed
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mygeneric1 destroyed
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---
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myobj destroyed
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myobj destroyed
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'''
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"""
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type
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TMyObj = object
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x, y: int
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p: pointer
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proc `=destroy`(o: var TMyObj) =
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if o.p != nil:
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dealloc o.p
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o.p = nil
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echo "myobj destroyed"
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type
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TMyGeneric1[T] = object
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x: T
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TMyGeneric2[A, B] = object
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x: A
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y: B
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proc `=destroy`(o: var TMyGeneric1[int]) =
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echo "mygeneric1 destroyed"
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proc `=destroy`[A, B](o: var TMyGeneric2[A, B]) =
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echo "mygeneric2 destroyed"
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type
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TMyGeneric3[A, B, C] = object
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x: A
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y: B
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z: C
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TDistinctObjX = distinct TMyGeneric3[TMyObj, TMyGeneric2[int, int], int]
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TDistinctObj = TDistinctObjX
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TObjKind = enum Z, A, B, C, D
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TCaseObj = object
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z: TMyGeneric3[TMyObj, float, int]
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case kind: TObjKind
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of Z: discard
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of A:
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x: TMyGeneric1[int]
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of B, C:
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y: TMyObj
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else:
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case innerKind: TObjKind
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of Z: discard
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of A, B, C:
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p: TMyGeneric3[int, float, string]
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of D:
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q: TMyGeneric3[TMyObj, int, int]
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r: string
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proc open: TMyObj =
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# allow for superfluous ()
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result = (TMyObj(x: 1, y: 2, p: alloc(3)))
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proc `$`(x: TMyObj): string = $x.y
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proc myobj() =
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var x = open()
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echo "myobj constructed"
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proc mygeneric1() =
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var x = TMyGeneric1[int](x: 10)
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echo "mygeneric1 constructed"
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proc mygeneric2[T](val: T) =
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var a = open()
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var b = TMyGeneric2[int, T](x: 10, y: val)
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echo "mygeneric2 constructed"
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var c = TMyGeneric3[int, int, string](x: 10, y: 20, z: "test")
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proc mygeneric3 =
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var x = TMyGeneric3[int, string, TMyGeneric1[int]](
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x: 10, y: "test", z: TMyGeneric1[int](x: 10))
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echo "mygeneric3 constructed"
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proc mydistinctObj =
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var x = TMyGeneric3[TMyObj, TMyGeneric2[int, int], int](
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x: open(), y: TMyGeneric2[int, int](x: 5, y: 15), z: 20)
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echo "mydistinctObj constructed"
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echo "----"
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myobj()
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echo "----"
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mygeneric1()
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echo "----"
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mygeneric2[int](10)
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echo "----"
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mygeneric3()
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echo "----"
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mydistinctObj()
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proc caseobj =
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block:
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var o1 = TCaseObj(kind: A, x: TMyGeneric1[int](x: 10))
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block:
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echo "----"
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var o2 = TCaseObj(kind: B, y: open())
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block:
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echo "----"
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var o3 = TCaseObj(kind: D, innerKind: B, r: "test",
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p: TMyGeneric3[int, float, string](x: 10, y: 1.0, z: "test"))
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echo "------------------"
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caseobj()
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proc caseobj_test_sink: TCaseObj =
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# check that lifted sink can destroy case val correctly
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result = TCaseObj(kind: D, innerKind: D, r: "test",
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q: TMyGeneric3[TMyObj, int, int](x: open(), y: 1, z: 0))
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result = TCaseObj(kind: B, y: open())
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echo "---"
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discard caseobj_test_sink() |