Skip to content

Reorder TypeFlags to improve sort order #1226

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
ahejlsberg merged 6 commits into from
Jun 18, 2025
Merged

Reorder TypeFlags to improve sort order #1226

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
6 commits
Select commit Hold shift + click to select a range
ff9e1f9
Move TypeFlagsNonPrimitive to lower position in type ordering
ahejlsberg Jun 18, 2025
72a37a7
Accept new baselines
ahejlsberg Jun 18, 2025
32a6f86
Add regression test
ahejlsberg Jun 18, 2025
303ea05
Move unions/intersections to last position in sort order
ahejlsberg Jun 18, 2025
9778e51
Accept new baselines
ahejlsberg Jun 18, 2025
20e51f8
Merge branch 'main' into fix-1164
ahejlsberg Jun 18, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
24 changes: 12 additions & 12 deletions internal/checker/types.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -427,18 +427,18 @@ const (
TypeFlagsUniqueESSymbol TypeFlags = 1 << 14 // unique symbol
TypeFlagsEnumLiteral TypeFlags = 1 << 15 // Always combined with StringLiteral, NumberLiteral, or Union
TypeFlagsEnum TypeFlags = 1 << 16 // Numeric computed enum member value (must be right after EnumLiteral, see getSortOrderFlags)
TypeFlagsNever TypeFlags = 1 << 17 // Never type
TypeFlagsTypeParameter TypeFlags = 1 << 18 // Type parameter
TypeFlagsObject TypeFlags = 1 << 19 // Object type
TypeFlagsUnion TypeFlags = 1 << 20 // Union (T | U)
TypeFlagsIntersection TypeFlags = 1 << 21 // Intersection (T & U)
TypeFlagsIndex TypeFlags = 1 << 22 // keyof T
TypeFlagsIndexedAccess TypeFlags = 1 << 23 // T[K]
TypeFlagsConditional TypeFlags = 1 << 24 // T extends U ? X : Y
TypeFlagsSubstitution TypeFlags = 1 << 25 // Type parameter substitution
TypeFlagsNonPrimitive TypeFlags = 1 << 26 // intrinsic object type
TypeFlagsTemplateLiteral TypeFlags = 1 << 27 // Template literal type
TypeFlagsStringMapping TypeFlags = 1 << 28 // Uppercase/Lowercase type
TypeFlagsNonPrimitive TypeFlags = 1 << 17 // intrinsic object type
TypeFlagsNever TypeFlags = 1 << 18 // Never type
TypeFlagsTypeParameter TypeFlags = 1 << 19 // Type parameter
TypeFlagsObject TypeFlags = 1 << 20 // Object type
TypeFlagsIndex TypeFlags = 1 << 21 // keyof T
TypeFlagsIndexedAccess TypeFlags = 1 << 22 // T[K]
TypeFlagsConditional TypeFlags = 1 << 23 // T extends U ? X : Y
TypeFlagsSubstitution TypeFlags = 1 << 24 // Type parameter substitution
TypeFlagsTemplateLiteral TypeFlags = 1 << 25 // Template literal type
TypeFlagsStringMapping TypeFlags = 1 << 26 // Uppercase/Lowercase type
TypeFlagsUnion TypeFlags = 1 << 27 // Union (T | U)
TypeFlagsIntersection TypeFlags = 1 << 28 // Intersection (T & U)
TypeFlagsReserved1 TypeFlags = 1 << 29 // Used by union/intersection type construction
TypeFlagsReserved2 TypeFlags = 1 << 30 // Used by union/intersection type construction
TypeFlagsReserved3 TypeFlags = 1 << 31
Expand Down
26 changes: 26 additions & 0 deletions testdata/baselines/reference/compiler/objectSubtypeReduction.symbols
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,26 @@
//// [tests/cases/compiler/objectSubtypeReduction.ts] ////

=== objectSubtypeReduction.ts ===
// https://github.com/microsoft/typescript-go/issues/1164

function foo(x?: object) {
>foo : Symbol(foo, Decl(objectSubtypeReduction.ts, 0, 0))
>x : Symbol(x, Decl(objectSubtypeReduction.ts, 2, 13))

return Object.entries(x || {})
>Object.entries(x || {}) .sort : Symbol(sort, Decl(lib.es5.d.ts, --, --))
>Object.entries : Symbol(entries, Decl(lib.es2017.object.d.ts, --, --), Decl(lib.es2017.object.d.ts, --, --))
>Object : Symbol(Object, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>entries : Symbol(entries, Decl(lib.es2017.object.d.ts, --, --), Decl(lib.es2017.object.d.ts, --, --))
>x : Symbol(x, Decl(objectSubtypeReduction.ts, 2, 13))

.sort(([k1, v1], [k2, v2]) => v1.name.localeCompare(v2.name));
>sort : Symbol(sort, Decl(lib.es5.d.ts, --, --))
>k1 : Symbol(k1, Decl(objectSubtypeReduction.ts, 4, 16))
>v1 : Symbol(v1, Decl(objectSubtypeReduction.ts, 4, 19))
>k2 : Symbol(k2, Decl(objectSubtypeReduction.ts, 4, 26))
>v2 : Symbol(v2, Decl(objectSubtypeReduction.ts, 4, 29))
>v1 : Symbol(v1, Decl(objectSubtypeReduction.ts, 4, 19))
>v2 : Symbol(v2, Decl(objectSubtypeReduction.ts, 4, 29))
}

38 changes: 38 additions & 0 deletions testdata/baselines/reference/compiler/objectSubtypeReduction.types
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,38 @@
//// [tests/cases/compiler/objectSubtypeReduction.ts] ////

=== objectSubtypeReduction.ts ===
// https://github.com/microsoft/typescript-go/issues/1164

function foo(x?: object) {
>foo : (x?: object | undefined) => [string, any][]
>x : object | undefined

return Object.entries(x || {})
>Object.entries(x || {}) .sort(([k1, v1], [k2, v2]) => v1.name.localeCompare(v2.name)) : [string, any][]
>Object.entries(x || {}) .sort : (compareFn?: ((a: [string, any], b: [string, any]) => number) | undefined) => [string, any][]
>Object.entries(x || {}) : [string, any][]
>Object.entries : { <T>(o: ArrayLike<T> | { [s: string]: T; }): [string, T][]; (o: {}): [string, any][]; }
>Object : ObjectConstructor
>entries : { <T>(o: ArrayLike<T> | { [s: string]: T; }): [string, T][]; (o: {}): [string, any][]; }
>x || {} : object
>x : object | undefined
>{} : {}

.sort(([k1, v1], [k2, v2]) => v1.name.localeCompare(v2.name));
>sort : (compareFn?: ((a: [string, any], b: [string, any]) => number) | undefined) => [string, any][]
>([k1, v1], [k2, v2]) => v1.name.localeCompare(v2.name) : ([k1, v1]: [string, any], [k2, v2]: [string, any]) => any
>k1 : string
>v1 : any
>k2 : string
>v2 : any
>v1.name.localeCompare(v2.name) : any
>v1.name.localeCompare : any
>v1.name : any
>v1 : any
>name : any
>localeCompare : any
>v2.name : any
>v2 : any
>name : any
}

8 changes: 4 additions & 4 deletions testdata/baselines/reference/submodule/compiler/circularContextualReturnType.types
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -5,19 +5,19 @@

Object.freeze({
>Object.freeze({ foo() { return Object.freeze('a'); },}) : Readonly<{ foo(): string; }>
>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object | null | undefined; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U | null | undefined; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object : ObjectConstructor
>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object | null | undefined; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U | null | undefined; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>{ foo() { return Object.freeze('a'); },} : { foo(): string; }

foo() {
>foo : () => string

return Object.freeze('a');
>Object.freeze('a') : string
>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object | null | undefined; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U | null | undefined; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object : ObjectConstructor
>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object | null | undefined; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U | null | undefined; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>'a' : "a"

},
Expand Down
8 changes: 4 additions & 4 deletions testdata/baselines/reference/submodule/compiler/circularContextualReturnType.types.diff
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -5,10 +5,10 @@
Object.freeze({
>Object.freeze({ foo() { return Object.freeze('a'); },}) : Readonly<{ foo(): string; }>
->Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | null | undefined | object; }, U extends string | bigint | number | boolean | symbol>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
+>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object | null | undefined; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
+>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U | null | undefined; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object : ObjectConstructor
->freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | null | undefined | object; }, U extends string | bigint | number | boolean | symbol>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
+>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object | null | undefined; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
+>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U | null | undefined; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>{ foo() { return Object.freeze('a'); },} : { foo(): string; }

foo() {
Expand All @@ -17,10 +17,10 @@
return Object.freeze('a');
>Object.freeze('a') : string
->Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | null | undefined | object; }, U extends string | bigint | number | boolean | symbol>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
+>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object | null | undefined; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
+>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U | null | undefined; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object : ObjectConstructor
->freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | null | undefined | object; }, U extends string | bigint | number | boolean | symbol>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
+>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object | null | undefined; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
+>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U | null | undefined; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>'a' : "a"

},
4 changes: 2 additions & 2 deletions testdata/baselines/reference/submodule/compiler/contextualSignatureInObjectFreeze.types
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -5,9 +5,9 @@

Object.freeze({
>Object.freeze({ f: function () { }}) : Readonly<{ f: () => void; }>
>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object : ObjectConstructor
>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>{ f: function () { }} : { f: () => void; }

f: function () { }
Expand Down
4 changes: 2 additions & 2 deletions testdata/baselines/reference/submodule/compiler/contextualSignatureInObjectFreeze.types.diff
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -5,10 +5,10 @@
Object.freeze({
>Object.freeze({ f: function () { }}) : Readonly<{ f: () => void; }>
->Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | null | undefined | object; }, U extends string | bigint | number | boolean | symbol>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
+>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
+>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object : ObjectConstructor
->freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | null | undefined | object; }, U extends string | bigint | number | boolean | symbol>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
+>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
+>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>{ f: function () { }} : { f: () => void; }

f: function () { }
6 changes: 3 additions & 3 deletions testdata/baselines/reference/submodule/compiler/correlatedUnions.types
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -860,15 +860,15 @@ function getConfigOrDefault<T extends keyof Config>(
>key : T

const assertedCheck = userValue ? userValue! : defaultValue;
>assertedCheck : NonNullable<Partial<Config>[T]>
>userValue ? userValue! : defaultValue : NonNullable<Partial<Config>[T]>
>assertedCheck : Config[T]
>userValue ? userValue! : defaultValue : Config[T]
>userValue : Partial<Config>[T]
>userValue! : NonNullable<Partial<Config>[T]>
>userValue : NonNullable<Partial<Config>[T]>
>defaultValue : Config[T]

return assertedCheck;
>assertedCheck : NonNullable<Partial<Config>[T]>
>assertedCheck : Config[T]
}

// repro from #47523
Expand Down
21 changes: 20 additions & 1 deletion testdata/baselines/reference/submodule/compiler/correlatedUnions.types.diff
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -141,4 +141,23 @@
+>< K extends KeyOfOriginal, N extends NestedKeyOfOriginalFor<K>>( original: Original, mappedFromOriginal: MappedFromOriginal, key: K, nestedKey: N): [Original[K][N], MappedFromOriginal[K][N]] => { return [original[key][nestedKey], mappedFromOriginal[key][nestedKey]];} : <K extends keyof Original, N extends keyof Original[K]>(original: Original, mappedFromOriginal: SameKeys<Original>, key: K, nestedKey: N) => [Original[K][N], SameKeys<Original>[K][N]]

K extends KeyOfOriginal,
N extends NestedKeyOfOriginalFor<K>
N extends NestedKeyOfOriginalFor<K>
@@= skipped -63, +63 lines =@@
>key : T

const assertedCheck = userValue ? userValue! : defaultValue;
->assertedCheck : NonNullable<Partial<Config>[T]>
->userValue ? userValue! : defaultValue : NonNullable<Partial<Config>[T]>
+>assertedCheck : Config[T]
+>userValue ? userValue! : defaultValue : Config[T]
>userValue : Partial<Config>[T]
>userValue! : NonNullable<Partial<Config>[T]>
>userValue : NonNullable<Partial<Config>[T]>
>defaultValue : Config[T]

return assertedCheck;
->assertedCheck : NonNullable<Partial<Config>[T]>
+>assertedCheck : Config[T]
}

// repro from #47523
4 changes: 2 additions & 2 deletions testdata/baselines/reference/submodule/compiler/jsEnumTagOnObjectFrozen.types
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -51,9 +51,9 @@ cbThing(type => {
const Thing = Object.freeze({
>Thing : Readonly<{ a: "thing"; b: "chill"; }>
>Object.freeze({ a: "thing", b: "chill"}) : Readonly<{ a: "thing"; b: "chill"; }>
>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object : ObjectConstructor
>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>{ a: "thing", b: "chill"} : { a: "thing"; b: "chill"; }

a: "thing",
Expand Down
16 changes: 8 additions & 8 deletions testdata/baselines/reference/submodule/compiler/objectFreeze.types
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4,9 +4,9 @@
const f = Object.freeze(function foo(a: number, b: string) { return false; });
>f : (a: number, b: string) => false
>Object.freeze(function foo(a: number, b: string) { return false; }) : (a: number, b: string) => false
>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object : ObjectConstructor
>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>function foo(a: number, b: string) { return false; } : (a: number, b: string) => false
>foo : (a: number, b: string) => false
>a : number
Expand All @@ -28,9 +28,9 @@ class C { constructor(a: number) { } }
const c = Object.freeze(C);
>c : typeof C
>Object.freeze(C) : typeof C
>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object : ObjectConstructor
>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>C : typeof C

new c(1);
Expand All @@ -41,9 +41,9 @@ new c(1);
const a = Object.freeze([1, 2, 3]);
>a : readonly number[]
>Object.freeze([1, 2, 3]) : readonly number[]
>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object : ObjectConstructor
>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>[1, 2, 3] : number[]
>1 : 1
>2 : 2
Expand All @@ -64,9 +64,9 @@ a[0] = a[2].toString();
const o = Object.freeze({ a: 1, b: "string", c: true });
>o : Readonly<{ a: 1; b: "string"; c: true; }>
>Object.freeze({ a: 1, b: "string", c: true }) : Readonly<{ a: 1; b: "string"; c: true; }>
>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object.freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>Object : ObjectConstructor
>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: U | object; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>freeze : { <T extends Function>(f: T): T; <T extends { [idx: string]: object | U; }, U extends string | number | bigint | symbol | boolean>(o: T): Readonly<T>; <T>(o: T): Readonly<T>; }
>{ a: 1, b: "string", c: true } : { a: 1; b: "string"; c: true; }
>a : 1
>1 : 1
Expand Down
Loading