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hashes: support object default hash (#17175)

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This commit is contained in:
Timothee Cour
2021-02-25 23:45:37 -08:00
committed by GitHub
parent 4a31088ac2
commit 63f1c38f4e
3 changed files with 62 additions and 18 deletions
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46
tests/stdlib/thashes.nim
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@@ -130,5 +130,51 @@ proc main() =
# run at CT, expecting c semantics.
discard
block: # hash(object)
type
Obj = object
x: int
y: string
Obj2[T] = object
x: int
y: string
Obj3 = object
x: int
y: string
Obj4 = object
case t: bool
of false:
x: int
of true:
y: int
z: int
Obj5 = object
case t: bool
of false:
x: int
of true:
y: int
z: int
proc hash(a: Obj2): Hash = hash(a.x)
proc hash(a: Obj3): Hash = hash((a.x,))
proc hash(a: Obj5): Hash =
case a.t
of false: hash(a.x)
of true: hash(a.y)
doAssert hash(Obj(x: 520, y: "Nim")) != hash(Obj(x: 520, y: "Nim2"))
doAssert hash(Obj2[float](x: 520, y: "Nim")) == hash(Obj2[float](x: 520, y: "Nim2"))
doAssert hash(Obj2[float](x: 520, y: "Nim")) != hash(Obj2[float](x: 521, y: "Nim2"))
doAssert hash(Obj3(x: 520, y: "Nim")) == hash(Obj3(x: 520, y: "Nim2"))
doAssert hash(Obj4(t: false, x: 1)) == hash(Obj4(t: false, x: 1))
doAssert hash(Obj4(t: false, x: 1)) != hash(Obj4(t: false, x: 2))
doAssert hash(Obj4(t: false, x: 1)) != hash(Obj4(t: true, y: 1))
doAssert hash(Obj5(t: false, x: 1)) != hash(Obj5(t: false, x: 2))
doAssert hash(Obj5(t: false, x: 1)) == hash(Obj5(t: true, y: 1))
doAssert hash(Obj5(t: false, x: 1)) != hash(Obj5(t: true, y: 2))
static: main()
main()