TypeScript/tests/baselines/reference/tailRecursiveConditionalTypes.symbols
Anders Hejlsberg b9eeb74f37
Tail recursive evaluation of conditional types (#45711)
* Implement tail-recursion for conditional types and lower general instantiation depth limit to 100

* Add tests

* Skip caching for tail recursive temporary conditional types
2021-09-08 15:42:09 -07:00

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=== tests/cases/compiler/tailRecursiveConditionalTypes.ts ===
type Trim<S extends string> =
>Trim : Symbol(Trim, Decl(tailRecursiveConditionalTypes.ts, 0, 0))
>S : Symbol(S, Decl(tailRecursiveConditionalTypes.ts, 0, 10))
S extends ` ${infer T}` ? Trim<T> :
>S : Symbol(S, Decl(tailRecursiveConditionalTypes.ts, 0, 10))
>T : Symbol(T, Decl(tailRecursiveConditionalTypes.ts, 1, 23))
>Trim : Symbol(Trim, Decl(tailRecursiveConditionalTypes.ts, 0, 0))
>T : Symbol(T, Decl(tailRecursiveConditionalTypes.ts, 1, 23))
S extends `${infer T} ` ? Trim<T> :
>S : Symbol(S, Decl(tailRecursiveConditionalTypes.ts, 0, 10))
>T : Symbol(T, Decl(tailRecursiveConditionalTypes.ts, 2, 22))
>Trim : Symbol(Trim, Decl(tailRecursiveConditionalTypes.ts, 0, 0))
>T : Symbol(T, Decl(tailRecursiveConditionalTypes.ts, 2, 22))
S;
>S : Symbol(S, Decl(tailRecursiveConditionalTypes.ts, 0, 10))
type T10 = Trim<' hello '>;
>T10 : Symbol(T10, Decl(tailRecursiveConditionalTypes.ts, 3, 6))
>Trim : Symbol(Trim, Decl(tailRecursiveConditionalTypes.ts, 0, 0))
type T11 = Trim<' hello '>;
>T11 : Symbol(T11, Decl(tailRecursiveConditionalTypes.ts, 5, 170))
>Trim : Symbol(Trim, Decl(tailRecursiveConditionalTypes.ts, 0, 0))
type GetChars<S> = GetCharsRec<S, never>;
>GetChars : Symbol(GetChars, Decl(tailRecursiveConditionalTypes.ts, 6, 170))
>S : Symbol(S, Decl(tailRecursiveConditionalTypes.ts, 8, 14))
>GetCharsRec : Symbol(GetCharsRec, Decl(tailRecursiveConditionalTypes.ts, 8, 41))
>S : Symbol(S, Decl(tailRecursiveConditionalTypes.ts, 8, 14))
type GetCharsRec<S, Acc> =
>GetCharsRec : Symbol(GetCharsRec, Decl(tailRecursiveConditionalTypes.ts, 8, 41))
>S : Symbol(S, Decl(tailRecursiveConditionalTypes.ts, 9, 17))
>Acc : Symbol(Acc, Decl(tailRecursiveConditionalTypes.ts, 9, 19))
S extends `${infer Char}${infer Rest}` ? GetCharsRec<Rest, Char | Acc> : Acc;
>S : Symbol(S, Decl(tailRecursiveConditionalTypes.ts, 9, 17))
>Char : Symbol(Char, Decl(tailRecursiveConditionalTypes.ts, 10, 22))
>Rest : Symbol(Rest, Decl(tailRecursiveConditionalTypes.ts, 10, 35))
>GetCharsRec : Symbol(GetCharsRec, Decl(tailRecursiveConditionalTypes.ts, 8, 41))
>Rest : Symbol(Rest, Decl(tailRecursiveConditionalTypes.ts, 10, 35))
>Char : Symbol(Char, Decl(tailRecursiveConditionalTypes.ts, 10, 22))
>Acc : Symbol(Acc, Decl(tailRecursiveConditionalTypes.ts, 9, 19))
>Acc : Symbol(Acc, Decl(tailRecursiveConditionalTypes.ts, 9, 19))
type T20 = GetChars<'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'>;
>T20 : Symbol(T20, Decl(tailRecursiveConditionalTypes.ts, 10, 81))
>GetChars : Symbol(GetChars, Decl(tailRecursiveConditionalTypes.ts, 6, 170))
type Reverse<T> = any[] extends T ? T : ReverseRec<T, []>;
>Reverse : Symbol(Reverse, Decl(tailRecursiveConditionalTypes.ts, 12, 86))
>T : Symbol(T, Decl(tailRecursiveConditionalTypes.ts, 14, 13))
>T : Symbol(T, Decl(tailRecursiveConditionalTypes.ts, 14, 13))
>T : Symbol(T, Decl(tailRecursiveConditionalTypes.ts, 14, 13))
>ReverseRec : Symbol(ReverseRec, Decl(tailRecursiveConditionalTypes.ts, 14, 58))
>T : Symbol(T, Decl(tailRecursiveConditionalTypes.ts, 14, 13))
type ReverseRec<T, Acc extends unknown[]> =
>ReverseRec : Symbol(ReverseRec, Decl(tailRecursiveConditionalTypes.ts, 14, 58))
>T : Symbol(T, Decl(tailRecursiveConditionalTypes.ts, 15, 16))
>Acc : Symbol(Acc, Decl(tailRecursiveConditionalTypes.ts, 15, 18))
T extends [infer Head, ...infer Tail] ? ReverseRec<Tail, [Head, ...Acc]> : Acc;
>T : Symbol(T, Decl(tailRecursiveConditionalTypes.ts, 15, 16))
>Head : Symbol(Head, Decl(tailRecursiveConditionalTypes.ts, 16, 20))
>Tail : Symbol(Tail, Decl(tailRecursiveConditionalTypes.ts, 16, 35))
>ReverseRec : Symbol(ReverseRec, Decl(tailRecursiveConditionalTypes.ts, 14, 58))
>Tail : Symbol(Tail, Decl(tailRecursiveConditionalTypes.ts, 16, 35))
>Head : Symbol(Head, Decl(tailRecursiveConditionalTypes.ts, 16, 20))
>Acc : Symbol(Acc, Decl(tailRecursiveConditionalTypes.ts, 15, 18))
>Acc : Symbol(Acc, Decl(tailRecursiveConditionalTypes.ts, 15, 18))
type T30 = Reverse<[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9]>;
>T30 : Symbol(T30, Decl(tailRecursiveConditionalTypes.ts, 16, 83))
>Reverse : Symbol(Reverse, Decl(tailRecursiveConditionalTypes.ts, 12, 86))
type T31 = Reverse<string[]>;
>T31 : Symbol(T31, Decl(tailRecursiveConditionalTypes.ts, 18, 171))
>Reverse : Symbol(Reverse, Decl(tailRecursiveConditionalTypes.ts, 12, 86))
type TupleOf<T, N extends number> = number extends N ? T[] : TupleOfRec<T, N, []>;
>TupleOf : Symbol(TupleOf, Decl(tailRecursiveConditionalTypes.ts, 19, 29))
>T : Symbol(T, Decl(tailRecursiveConditionalTypes.ts, 21, 13))
>N : Symbol(N, Decl(tailRecursiveConditionalTypes.ts, 21, 15))
>N : Symbol(N, Decl(tailRecursiveConditionalTypes.ts, 21, 15))
>T : Symbol(T, Decl(tailRecursiveConditionalTypes.ts, 21, 13))
>TupleOfRec : Symbol(TupleOfRec, Decl(tailRecursiveConditionalTypes.ts, 21, 82))
>T : Symbol(T, Decl(tailRecursiveConditionalTypes.ts, 21, 13))
>N : Symbol(N, Decl(tailRecursiveConditionalTypes.ts, 21, 15))
type TupleOfRec<T, N extends number, Acc extends unknown[]> =
>TupleOfRec : Symbol(TupleOfRec, Decl(tailRecursiveConditionalTypes.ts, 21, 82))
>T : Symbol(T, Decl(tailRecursiveConditionalTypes.ts, 22, 16))
>N : Symbol(N, Decl(tailRecursiveConditionalTypes.ts, 22, 18))
>Acc : Symbol(Acc, Decl(tailRecursiveConditionalTypes.ts, 22, 36))
Acc["length"] extends N ? Acc : TupleOfRec<T, N, [T, ...Acc]>;
>Acc : Symbol(Acc, Decl(tailRecursiveConditionalTypes.ts, 22, 36))
>N : Symbol(N, Decl(tailRecursiveConditionalTypes.ts, 22, 18))
>Acc : Symbol(Acc, Decl(tailRecursiveConditionalTypes.ts, 22, 36))
>TupleOfRec : Symbol(TupleOfRec, Decl(tailRecursiveConditionalTypes.ts, 21, 82))
>T : Symbol(T, Decl(tailRecursiveConditionalTypes.ts, 22, 16))
>N : Symbol(N, Decl(tailRecursiveConditionalTypes.ts, 22, 18))
>T : Symbol(T, Decl(tailRecursiveConditionalTypes.ts, 22, 16))
>Acc : Symbol(Acc, Decl(tailRecursiveConditionalTypes.ts, 22, 36))
type T40 = TupleOf<any, 200>;
>T40 : Symbol(T40, Decl(tailRecursiveConditionalTypes.ts, 23, 66))
>TupleOf : Symbol(TupleOf, Decl(tailRecursiveConditionalTypes.ts, 19, 29))
type T41 = TupleOf<any, number>;
>T41 : Symbol(T41, Decl(tailRecursiveConditionalTypes.ts, 25, 29))
>TupleOf : Symbol(TupleOf, Decl(tailRecursiveConditionalTypes.ts, 19, 29))