Use global NonNullable type for nonnull types (#22096)
* Use NonNullable type for nonnull types * Add noLib test * Remove conditional type fallback for when lib is not present
This commit is contained in:
parent
4ddf045d6a
commit
2f0a13c7c3
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@ -401,6 +401,7 @@ namespace ts {
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let anyArrayType: Type;
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let autoArrayType: Type;
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let anyReadonlyArrayType: Type;
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let deferredGlobalNonNullableTypeAlias: Symbol;
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// The library files are only loaded when the feature is used.
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// This allows users to just specify library files they want to used through --lib
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@ -11122,8 +11123,19 @@ namespace ts {
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return type.flags & TypeFlags.Undefined ? type : getUnionType([type, undefinedType]);
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}
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function getGlobalNonNullableTypeInstantiation(type: Type) {
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if (!deferredGlobalNonNullableTypeAlias) {
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deferredGlobalNonNullableTypeAlias = getGlobalSymbol("NonNullable" as __String, SymbolFlags.TypeAlias, /*diagnostic*/ undefined) || unknownSymbol;
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}
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// Use NonNullable global type alias if available to improve quick info/declaration emit
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if (deferredGlobalNonNullableTypeAlias !== unknownSymbol) {
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return getTypeAliasInstantiation(deferredGlobalNonNullableTypeAlias, [type]);
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}
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return getTypeWithFacts(type, TypeFacts.NEUndefinedOrNull); // Type alias unavailable, fall back to non-higherorder behavior
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}
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function getNonNullableType(type: Type): Type {
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return strictNullChecks ? getTypeWithFacts(type, TypeFacts.NEUndefinedOrNull) : type;
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return strictNullChecks ? getGlobalNonNullableTypeInstantiation(type) : type;
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}
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/**
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@ -13427,7 +13439,6 @@ namespace ts {
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return parent.kind === SyntaxKind.PropertyAccessExpression ||
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parent.kind === SyntaxKind.CallExpression && (<CallExpression>parent).expression === node ||
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parent.kind === SyntaxKind.ElementAccessExpression && (<ElementAccessExpression>parent).expression === node ||
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parent.kind === SyntaxKind.NonNullExpression ||
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parent.kind === SyntaxKind.BindingElement && (<BindingElement>parent).name === node && !!(<BindingElement>parent).initializer;
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}
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@ -23,18 +23,18 @@ function fn<T extends string | undefined, U extends string>(one: T, two: U) {
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foo(one!);
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>foo(one!) : void
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>foo : (p: string) => void
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>one! : string
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>one : string | undefined
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>one! : NonNullable<T>
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>one : T
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foo(two!);
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>foo(two!) : void
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>foo : (p: string) => void
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>two! : U
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>two! : NonNullable<U>
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>two : U
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foo(three!); // this line is the important one
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>foo(three!) : void
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>foo : (p: string) => void
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>three! : string
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>three : string
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>three! : NonNullable<T> | NonNullable<U>
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>three : T | U
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}
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@ -0,0 +1,55 @@
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error TS2318: Cannot find global type 'Array'.
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error TS2318: Cannot find global type 'Boolean'.
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error TS2318: Cannot find global type 'Function'.
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error TS2318: Cannot find global type 'IArguments'.
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error TS2318: Cannot find global type 'Number'.
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error TS2318: Cannot find global type 'Object'.
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error TS2318: Cannot find global type 'RegExp'.
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error TS2318: Cannot find global type 'String'.
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tests/cases/compiler/strictNullNotNullIndexTypeNoLib.ts(10,28): error TS2339: Property 'name' does not exist on type 'T["params"]'.
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!!! error TS2318: Cannot find global type 'Array'.
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!!! error TS2318: Cannot find global type 'Boolean'.
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!!! error TS2318: Cannot find global type 'Function'.
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!!! error TS2318: Cannot find global type 'IArguments'.
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!!! error TS2318: Cannot find global type 'Number'.
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!!! error TS2318: Cannot find global type 'Object'.
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!!! error TS2318: Cannot find global type 'RegExp'.
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!!! error TS2318: Cannot find global type 'String'.
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==== tests/cases/compiler/strictNullNotNullIndexTypeNoLib.ts (1 errors) ====
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type Readonly<T> = {readonly [K in keyof T]: T[K]}
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interface A {
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params?: { name: string; };
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}
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class Test<T extends A> {
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attrs: Readonly<T>;
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m() {
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this.attrs.params!.name;
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~~~~
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!!! error TS2339: Property 'name' does not exist on type 'T["params"]'.
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}
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}
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interface Foo {
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foo?: number;
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}
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class FooClass<P extends Foo = Foo> {
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properties: Readonly<P>;
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foo(): number {
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const { foo = 42 } = this.properties;
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return foo;
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}
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}
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class Test2<T extends A> {
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attrs: Readonly<T>;
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m() {
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return this.attrs.params!; // Return type should maintain relationship with `T` after being not-null-asserted, ideally
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}
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}
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61
tests/baselines/reference/strictNullNotNullIndexTypeNoLib.js
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61
tests/baselines/reference/strictNullNotNullIndexTypeNoLib.js
Normal file
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@ -0,0 +1,61 @@
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//// [strictNullNotNullIndexTypeNoLib.ts]
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type Readonly<T> = {readonly [K in keyof T]: T[K]}
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interface A {
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params?: { name: string; };
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}
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class Test<T extends A> {
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attrs: Readonly<T>;
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m() {
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this.attrs.params!.name;
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}
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}
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interface Foo {
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foo?: number;
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}
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class FooClass<P extends Foo = Foo> {
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properties: Readonly<P>;
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foo(): number {
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const { foo = 42 } = this.properties;
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return foo;
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}
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}
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class Test2<T extends A> {
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attrs: Readonly<T>;
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m() {
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return this.attrs.params!; // Return type should maintain relationship with `T` after being not-null-asserted, ideally
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}
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}
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//// [strictNullNotNullIndexTypeNoLib.js]
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var Test = /** @class */ (function () {
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function Test() {
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}
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Test.prototype.m = function () {
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this.attrs.params.name;
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};
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return Test;
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}());
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var FooClass = /** @class */ (function () {
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function FooClass() {
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}
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FooClass.prototype.foo = function () {
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var _a = this.properties.foo, foo = _a === void 0 ? 42 : _a;
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return foo;
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};
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return FooClass;
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}());
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var Test2 = /** @class */ (function () {
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function Test2() {
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}
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Test2.prototype.m = function () {
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return this.attrs.params; // Return type should maintain relationship with `T` after being not-null-asserted, ideally
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};
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return Test2;
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}());
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@ -0,0 +1,92 @@
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=== tests/cases/compiler/strictNullNotNullIndexTypeNoLib.ts ===
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type Readonly<T> = {readonly [K in keyof T]: T[K]}
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>Readonly : Symbol(Readonly, Decl(strictNullNotNullIndexTypeNoLib.ts, 0, 0))
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>T : Symbol(T, Decl(strictNullNotNullIndexTypeNoLib.ts, 0, 14))
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>K : Symbol(K, Decl(strictNullNotNullIndexTypeNoLib.ts, 0, 30))
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>T : Symbol(T, Decl(strictNullNotNullIndexTypeNoLib.ts, 0, 14))
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>T : Symbol(T, Decl(strictNullNotNullIndexTypeNoLib.ts, 0, 14))
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>K : Symbol(K, Decl(strictNullNotNullIndexTypeNoLib.ts, 0, 30))
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interface A {
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>A : Symbol(A, Decl(strictNullNotNullIndexTypeNoLib.ts, 0, 50))
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params?: { name: string; };
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>params : Symbol(A.params, Decl(strictNullNotNullIndexTypeNoLib.ts, 1, 13))
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>name : Symbol(name, Decl(strictNullNotNullIndexTypeNoLib.ts, 2, 14))
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}
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class Test<T extends A> {
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>Test : Symbol(Test, Decl(strictNullNotNullIndexTypeNoLib.ts, 3, 1))
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>T : Symbol(T, Decl(strictNullNotNullIndexTypeNoLib.ts, 5, 11))
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>A : Symbol(A, Decl(strictNullNotNullIndexTypeNoLib.ts, 0, 50))
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attrs: Readonly<T>;
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>attrs : Symbol(Test.attrs, Decl(strictNullNotNullIndexTypeNoLib.ts, 5, 25))
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>Readonly : Symbol(Readonly, Decl(strictNullNotNullIndexTypeNoLib.ts, 0, 0))
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>T : Symbol(T, Decl(strictNullNotNullIndexTypeNoLib.ts, 5, 11))
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m() {
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>m : Symbol(Test.m, Decl(strictNullNotNullIndexTypeNoLib.ts, 6, 23))
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this.attrs.params!.name;
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>this.attrs.params : Symbol(params, Decl(strictNullNotNullIndexTypeNoLib.ts, 1, 13))
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>this.attrs : Symbol(Test.attrs, Decl(strictNullNotNullIndexTypeNoLib.ts, 5, 25))
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>this : Symbol(Test, Decl(strictNullNotNullIndexTypeNoLib.ts, 3, 1))
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>attrs : Symbol(Test.attrs, Decl(strictNullNotNullIndexTypeNoLib.ts, 5, 25))
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>params : Symbol(params, Decl(strictNullNotNullIndexTypeNoLib.ts, 1, 13))
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}
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}
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interface Foo {
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>Foo : Symbol(Foo, Decl(strictNullNotNullIndexTypeNoLib.ts, 11, 1))
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foo?: number;
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>foo : Symbol(Foo.foo, Decl(strictNullNotNullIndexTypeNoLib.ts, 13, 15))
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}
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class FooClass<P extends Foo = Foo> {
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>FooClass : Symbol(FooClass, Decl(strictNullNotNullIndexTypeNoLib.ts, 15, 1))
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>P : Symbol(P, Decl(strictNullNotNullIndexTypeNoLib.ts, 17, 15))
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>Foo : Symbol(Foo, Decl(strictNullNotNullIndexTypeNoLib.ts, 11, 1))
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>Foo : Symbol(Foo, Decl(strictNullNotNullIndexTypeNoLib.ts, 11, 1))
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properties: Readonly<P>;
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>properties : Symbol(FooClass.properties, Decl(strictNullNotNullIndexTypeNoLib.ts, 17, 37))
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>Readonly : Symbol(Readonly, Decl(strictNullNotNullIndexTypeNoLib.ts, 0, 0))
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>P : Symbol(P, Decl(strictNullNotNullIndexTypeNoLib.ts, 17, 15))
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foo(): number {
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>foo : Symbol(FooClass.foo, Decl(strictNullNotNullIndexTypeNoLib.ts, 18, 28))
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const { foo = 42 } = this.properties;
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>foo : Symbol(foo, Decl(strictNullNotNullIndexTypeNoLib.ts, 21, 15))
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>this.properties : Symbol(FooClass.properties, Decl(strictNullNotNullIndexTypeNoLib.ts, 17, 37))
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>this : Symbol(FooClass, Decl(strictNullNotNullIndexTypeNoLib.ts, 15, 1))
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>properties : Symbol(FooClass.properties, Decl(strictNullNotNullIndexTypeNoLib.ts, 17, 37))
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return foo;
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>foo : Symbol(foo, Decl(strictNullNotNullIndexTypeNoLib.ts, 21, 15))
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}
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}
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class Test2<T extends A> {
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>Test2 : Symbol(Test2, Decl(strictNullNotNullIndexTypeNoLib.ts, 24, 1))
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>T : Symbol(T, Decl(strictNullNotNullIndexTypeNoLib.ts, 26, 12))
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>A : Symbol(A, Decl(strictNullNotNullIndexTypeNoLib.ts, 0, 50))
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attrs: Readonly<T>;
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>attrs : Symbol(Test2.attrs, Decl(strictNullNotNullIndexTypeNoLib.ts, 26, 26))
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>Readonly : Symbol(Readonly, Decl(strictNullNotNullIndexTypeNoLib.ts, 0, 0))
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>T : Symbol(T, Decl(strictNullNotNullIndexTypeNoLib.ts, 26, 12))
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m() {
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>m : Symbol(Test2.m, Decl(strictNullNotNullIndexTypeNoLib.ts, 27, 23))
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return this.attrs.params!; // Return type should maintain relationship with `T` after being not-null-asserted, ideally
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>this.attrs.params : Symbol(params, Decl(strictNullNotNullIndexTypeNoLib.ts, 1, 13))
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>this.attrs : Symbol(Test2.attrs, Decl(strictNullNotNullIndexTypeNoLib.ts, 26, 26))
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>this : Symbol(Test2, Decl(strictNullNotNullIndexTypeNoLib.ts, 24, 1))
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>attrs : Symbol(Test2.attrs, Decl(strictNullNotNullIndexTypeNoLib.ts, 26, 26))
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>params : Symbol(params, Decl(strictNullNotNullIndexTypeNoLib.ts, 1, 13))
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}
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}
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@ -0,0 +1,97 @@
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=== tests/cases/compiler/strictNullNotNullIndexTypeNoLib.ts ===
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type Readonly<T> = {readonly [K in keyof T]: T[K]}
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>Readonly : Readonly<T>
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>T : T
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>K : K
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>T : T
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>T : T
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>K : K
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interface A {
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>A : A
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params?: { name: string; };
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>params : { name: string; } | undefined
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>name : string
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}
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class Test<T extends A> {
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>Test : Test<T>
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>T : T
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>A : A
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attrs: Readonly<T>;
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>attrs : Readonly<T>
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>Readonly : Readonly<T>
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>T : T
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m() {
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>m : () => void
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this.attrs.params!.name;
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>this.attrs.params!.name : any
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>this.attrs.params! : T["params"]
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>this.attrs.params : T["params"]
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>this.attrs : Readonly<T>
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>this : this
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>attrs : Readonly<T>
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>params : T["params"]
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>name : any
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}
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}
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interface Foo {
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>Foo : Foo
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foo?: number;
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>foo : number | undefined
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}
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class FooClass<P extends Foo = Foo> {
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>FooClass : FooClass<P>
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>P : P
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>Foo : Foo
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>Foo : Foo
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properties: Readonly<P>;
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>properties : Readonly<P>
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>Readonly : Readonly<T>
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>P : P
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foo(): number {
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>foo : () => number
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const { foo = 42 } = this.properties;
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>foo : number
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>42 : 42
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>this.properties : Readonly<P>
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>this : this
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>properties : Readonly<P>
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return foo;
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>foo : number
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}
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}
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class Test2<T extends A> {
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>Test2 : Test2<T>
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>T : T
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>A : A
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attrs: Readonly<T>;
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>attrs : Readonly<T>
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>Readonly : Readonly<T>
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>T : T
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m() {
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>m : () => T["params"]
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return this.attrs.params!; // Return type should maintain relationship with `T` after being not-null-asserted, ideally
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>this.attrs.params! : T["params"]
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>this.attrs.params : T["params"]
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>this.attrs : Readonly<T>
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>this : this
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>attrs : Readonly<T>
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>params : T["params"]
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}
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}
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@ -22,12 +22,12 @@ class Test<T extends A> {
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this.attrs.params!.name;
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>this.attrs.params!.name : string
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>this.attrs.params! : { name: string; }
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>this.attrs.params : { name: string; } | undefined
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>this.attrs.params! : NonNullable<T["params"]>
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>this.attrs.params : T["params"]
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>this.attrs : Readonly<T>
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>this : this
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>attrs : Readonly<T>
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>params : { name: string; } | undefined
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>params : T["params"]
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>name : string
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}
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}
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@ -76,14 +76,14 @@ class Test2<T extends A> {
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>T : T
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m() {
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>m : () => { name: string; }
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>m : () => NonNullable<T["params"]>
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return this.attrs.params!; // Return type should maintain relationship with `T` after being not-null-asserted, ideally
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>this.attrs.params! : { name: string; }
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>this.attrs.params : { name: string; } | undefined
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>this.attrs.params! : NonNullable<T["params"]>
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>this.attrs.params : T["params"]
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>this.attrs : Readonly<T>
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>this : this
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>attrs : Readonly<T>
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>params : { name: string; } | undefined
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>params : T["params"]
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}
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}
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35
tests/cases/compiler/strictNullNotNullIndexTypeNoLib.ts
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35
tests/cases/compiler/strictNullNotNullIndexTypeNoLib.ts
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@ -0,0 +1,35 @@
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// @strictNullChecks: true
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// @noLib: true
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type Readonly<T> = {readonly [K in keyof T]: T[K]}
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interface A {
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params?: { name: string; };
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}
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class Test<T extends A> {
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attrs: Readonly<T>;
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m() {
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this.attrs.params!.name;
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}
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}
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interface Foo {
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foo?: number;
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}
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class FooClass<P extends Foo = Foo> {
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properties: Readonly<P>;
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foo(): number {
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const { foo = 42 } = this.properties;
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return foo;
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}
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}
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class Test2<T extends A> {
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attrs: Readonly<T>;
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m() {
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return this.attrs.params!; // Return type should maintain relationship with `T` after being not-null-asserted, ideally
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}
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}
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