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feat(stdlib)!: Handle printing of reference cycles (#1844)
* feat(stdlib)!: Handle printing of reference cycles * include boxes, arrays, improve average case perf * make types in test recursive
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open Grain_tests.TestFramework; | ||
open Grain_tests.Runner; | ||
|
||
describe("cyclic references", ({test, testSkip}) => { | ||
let test_or_skip = | ||
Sys.backend_type == Other("js_of_ocaml") ? testSkip : test; | ||
|
||
let assertRun = makeRunner(test_or_skip); | ||
|
||
assertRun( | ||
"cycles1", | ||
{| | ||
record rec A { | ||
mut a: Option<A> | ||
} | ||
let x = { a: None } | ||
x.a = Some(x) | ||
print(x) | ||
|}, | ||
"<1> {\n a: Some(<cycle to <1>>)\n}\n", | ||
); | ||
assertRun( | ||
"cycles2", | ||
{| | ||
record rec A { | ||
val: Number, | ||
mut a: Option<A> | ||
} | ||
let x = { val: 1, a: None } | ||
let y = { val: 2, a: None } | ||
let xOpt = Some(x) | ||
let yOpt = Some(y) | ||
x.a = yOpt | ||
y.a = xOpt | ||
print([x, y]) | ||
|}, | ||
"[<1> {\n val: 1,\n a: Some({\n val: 2,\n a: Some(<cycle to <1>>)\n })\n}, <2> {\n val: 2,\n a: Some(<1> {\n val: 1,\n a: Some(<cycle to <2>>)\n })\n}]\n", | ||
); | ||
assertRun( | ||
"cycles3", | ||
{| | ||
record rec A { | ||
val: Number, | ||
mut next: Option<A> | ||
} | ||
let a = { val: 1, next: None } | ||
let aOpt = Some(a) | ||
let b = Some({ val: 2, next: aOpt }) | ||
let c = Some({ val: 3, next: b }) | ||
let d = Some({ val: 4, next: c }) | ||
let e = Some({ val: 5, next: d }) | ||
a.next = e | ||
print([aOpt, b, c, d, e]) | ||
|}, | ||
{|[Some(<1> { | ||
val: 1, | ||
next: Some({ | ||
val: 5, | ||
next: Some({ | ||
val: 4, | ||
next: Some({ | ||
val: 3, | ||
next: Some({ | ||
val: 2, | ||
next: Some(<cycle to <1>>) | ||
}) | ||
}) | ||
}) | ||
}) | ||
}), Some(<2> { | ||
val: 2, | ||
next: Some(<1> { | ||
val: 1, | ||
next: Some({ | ||
val: 5, | ||
next: Some({ | ||
val: 4, | ||
next: Some({ | ||
val: 3, | ||
next: Some(<cycle to <2>>) | ||
}) | ||
}) | ||
}) | ||
}) | ||
}), Some(<3> { | ||
val: 3, | ||
next: Some(<2> { | ||
val: 2, | ||
next: Some(<1> { | ||
val: 1, | ||
next: Some({ | ||
val: 5, | ||
next: Some({ | ||
val: 4, | ||
next: Some(<cycle to <3>>) | ||
}) | ||
}) | ||
}) | ||
}) | ||
}), Some(<4> { | ||
val: 4, | ||
next: Some(<3> { | ||
val: 3, | ||
next: Some(<2> { | ||
val: 2, | ||
next: Some(<1> { | ||
val: 1, | ||
next: Some({ | ||
val: 5, | ||
next: Some(<cycle to <4>>) | ||
}) | ||
}) | ||
}) | ||
}) | ||
}), Some(<5> { | ||
val: 5, | ||
next: Some(<4> { | ||
val: 4, | ||
next: Some(<3> { | ||
val: 3, | ||
next: Some(<2> { | ||
val: 2, | ||
next: Some(<1> { | ||
val: 1, | ||
next: Some(<cycle to <5>>) | ||
}) | ||
}) | ||
}) | ||
}) | ||
})] | ||
|}, | ||
); | ||
assertRun( | ||
"cycles4", | ||
{| | ||
enum rec R { | ||
Rec(Box<Option<R>>), | ||
} | ||
let a = box(None) | ||
let b = Rec(a) | ||
a := Some(b) | ||
print(a) | ||
print(unbox(a)) | ||
|}, | ||
"<1> box(Some(Rec(<cycle to <1>>)))\nSome(Rec(<1> box(Some(Rec(<cycle to <1>>)))))\n", | ||
); | ||
assertRun( | ||
"cycles5", | ||
{| | ||
enum rec R { | ||
Rec(Array<Option<R>>), | ||
} | ||
let a = [> None] | ||
let b = Rec(a) | ||
a[0] = Some(b) | ||
print(a) | ||
|}, | ||
"<1> [> Some(Rec(<cycle to <1>>))]\n", | ||
); | ||
}); |
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