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Merged
merged 6 commits into from
Dec 4, 2024
Merged

Avoid incorrectly reusing assertion nodes from property assignments #60576

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a2e2f05
Avoid incorrectly reusing assertion nodes from property assignments
Andarist Nov 24, 2024
a2db14d
Merge remote-tracking branch 'origin/main' into dont-reuse-assertion-…
Andarist Dec 4, 2024
8282c6d
improve the fix
Andarist Dec 4, 2024
1175802
remove obsolete import
Andarist Dec 4, 2024
f001c49
Merge remote-tracking branch 'origin/main' into dont-reuse-assertion-…
Andarist Dec 4, 2024
0407bd6
add dts test
Andarist Dec 4, 2024
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6 changes: 3 additions & 3 deletions src/compiler/expressionToTypeNode.ts
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Expand Up @@ -706,12 +706,12 @@ export function createSyntacticTypeNodeBuilder(
}
if (!result && node.kind === SyntaxKind.PropertyAssignment) {
const initializer = node.initializer;
const type = isJSDocTypeAssertion(initializer) ? getJSDocTypeAssertionType(initializer) :
const assertionNode = isJSDocTypeAssertion(initializer) ? getJSDocTypeAssertionType(initializer) :
initializer.kind === SyntaxKind.AsExpression || initializer.kind === SyntaxKind.TypeAssertionExpression ? (initializer as AsExpression | TypeAssertion).type :
undefined;

if (type && !isConstTypeReference(type)) {
result = serializeExistingTypeNode(type, context);
if (assertionNode && !isConstTypeReference(assertionNode) && resolver.canReuseTypeNodeAnnotation(context, node, assertionNode, symbol)) {
result = serializeExistingTypeNode(assertionNode, context);
Comment on lines +713 to +714
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I was largely unsure about this given you ask a question about node then use that to work with assertionNode, but this is effectively the same check as:

    function typeFromPropertyAssignment(node: PropertyAssignment | ShorthandPropertyAssignment, symbol: Symbol, context: SyntacticTypeNodeBuilderContext) {
        const typeAnnotation = getEffectiveTypeAnnotationNode(node);
        let result;
        if (typeAnnotation && resolver.canReuseTypeNodeAnnotation(context, node, typeAnnotation, symbol)) {
            result = serializeExistingTypeNode(typeAnnotation, context);
        }

So I definitely like this change more than the initial version.

}
}
return result ?? inferTypeOfDeclaration(node, symbol, context, /*reportFallback*/ false);
Expand Down
34 changes: 34 additions & 0 deletions tests/baselines/reference/declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.js
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//// [tests/cases/compiler/declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts] ////

//// [declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts]
type Wrapper<T> = {
_type: T;
};

declare function stringWrapper(): Wrapper<string>;

declare function objWrapper<T extends Record<string, Wrapper<any>>>(
obj: T,
): Wrapper<T>;

const value = objWrapper({
prop1: stringWrapper() as Wrapper<"hello">,
});

type Unwrap<T> = T extends Wrapper<any>
? T["_type"] extends Record<string, Wrapper<any>>
? { [Key in keyof T["_type"]]: Unwrap<T["_type"][Key]> }
: T["_type"]
: never;

declare function unwrap<T>(wrapper: T): Unwrap<T>;

export const unwrapped = unwrap(value);




//// [declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.d.ts]
export declare const unwrapped: {
prop1: "hello";
};
Comment on lines +31 to +34
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@jakebailey here is the requested dts test

78 changes: 78 additions & 0 deletions tests/baselines/reference/declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.symbols
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//// [tests/cases/compiler/declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts] ////

=== declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts ===
type Wrapper<T> = {
>Wrapper : Symbol(Wrapper, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 0, 0))
>T : Symbol(T, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 0, 13))

_type: T;
>_type : Symbol(_type, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 0, 19))
>T : Symbol(T, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 0, 13))

};

declare function stringWrapper(): Wrapper<string>;
>stringWrapper : Symbol(stringWrapper, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 2, 2))
>Wrapper : Symbol(Wrapper, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 0, 0))

declare function objWrapper<T extends Record<string, Wrapper<any>>>(
>objWrapper : Symbol(objWrapper, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 4, 50))
>T : Symbol(T, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 6, 28))
>Record : Symbol(Record, Decl(lib.es5.d.ts, --, --))
>Wrapper : Symbol(Wrapper, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 0, 0))

obj: T,
>obj : Symbol(obj, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 6, 68))
>T : Symbol(T, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 6, 28))

): Wrapper<T>;
>Wrapper : Symbol(Wrapper, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 0, 0))
>T : Symbol(T, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 6, 28))

const value = objWrapper({
>value : Symbol(value, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 10, 5))
>objWrapper : Symbol(objWrapper, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 4, 50))

prop1: stringWrapper() as Wrapper<"hello">,
>prop1 : Symbol(prop1, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 10, 26))
>stringWrapper : Symbol(stringWrapper, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 2, 2))
>Wrapper : Symbol(Wrapper, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 0, 0))

});

type Unwrap<T> = T extends Wrapper<any>
>Unwrap : Symbol(Unwrap, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 12, 3))
>T : Symbol(T, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 14, 12))
>T : Symbol(T, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 14, 12))
>Wrapper : Symbol(Wrapper, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 0, 0))

? T["_type"] extends Record<string, Wrapper<any>>
>T : Symbol(T, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 14, 12))
>Record : Symbol(Record, Decl(lib.es5.d.ts, --, --))
>Wrapper : Symbol(Wrapper, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 0, 0))

? { [Key in keyof T["_type"]]: Unwrap<T["_type"][Key]> }
>Key : Symbol(Key, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 16, 9))
>T : Symbol(T, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 14, 12))
>Unwrap : Symbol(Unwrap, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 12, 3))
>T : Symbol(T, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 14, 12))
>Key : Symbol(Key, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 16, 9))

: T["_type"]
>T : Symbol(T, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 14, 12))

: never;

declare function unwrap<T>(wrapper: T): Unwrap<T>;
>unwrap : Symbol(unwrap, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 18, 10))
>T : Symbol(T, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 20, 24))
>wrapper : Symbol(wrapper, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 20, 27))
>T : Symbol(T, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 20, 24))
>Unwrap : Symbol(Unwrap, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 12, 3))
>T : Symbol(T, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 20, 24))

export const unwrapped = unwrap(value);
>unwrapped : Symbol(unwrapped, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 22, 12))
>unwrap : Symbol(unwrap, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 18, 10))
>value : Symbol(value, Decl(declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts, 10, 5))

74 changes: 74 additions & 0 deletions tests/baselines/reference/declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.types
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//// [tests/cases/compiler/declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts] ////

=== declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts ===
type Wrapper<T> = {
>Wrapper : Wrapper<T>
> : ^^^^^^^^^^

_type: T;
>_type : T
> : ^

};

declare function stringWrapper(): Wrapper<string>;
>stringWrapper : () => Wrapper<string>
> : ^^^^^^

declare function objWrapper<T extends Record<string, Wrapper<any>>>(
>objWrapper : <T extends Record<string, Wrapper<any>>>(obj: T) => Wrapper<T>
> : ^ ^^^^^^^^^ ^^ ^^ ^^^^^

obj: T,
>obj : T
> : ^

): Wrapper<T>;

const value = objWrapper({
>value : Wrapper<{ prop1: Wrapper<"hello">; }>
> : ^^^^^^^^^^^^^^^^^ ^^^^
>objWrapper({ prop1: stringWrapper() as Wrapper<"hello">,}) : Wrapper<{ prop1: Wrapper<"hello">; }>
> : ^^^^^^^^^^^^^^^^^ ^^^^
>objWrapper : <T extends Record<string, Wrapper<any>>>(obj: T) => Wrapper<T>
> : ^ ^^^^^^^^^ ^^ ^^ ^^^^^
>{ prop1: stringWrapper() as Wrapper<"hello">,} : { prop1: Wrapper<"hello">; }
> : ^^^^^^^^^ ^^^

prop1: stringWrapper() as Wrapper<"hello">,
>prop1 : Wrapper<"hello">
> : ^^^^^^^^^^^^^^^^
>stringWrapper() as Wrapper<"hello"> : Wrapper<"hello">
> : ^^^^^^^^^^^^^^^^
>stringWrapper() : Wrapper<string>
> : ^^^^^^^^^^^^^^^
>stringWrapper : () => Wrapper<string>
> : ^^^^^^

});

type Unwrap<T> = T extends Wrapper<any>
>Unwrap : Unwrap<T>
> : ^^^^^^^^^

? T["_type"] extends Record<string, Wrapper<any>>
? { [Key in keyof T["_type"]]: Unwrap<T["_type"][Key]> }
: T["_type"]
: never;

declare function unwrap<T>(wrapper: T): Unwrap<T>;
>unwrap : <T>(wrapper: T) => Unwrap<T>
> : ^ ^^ ^^ ^^^^^
>wrapper : T
> : ^

export const unwrapped = unwrap(value);
>unwrapped : { prop1: "hello"; }
> : ^^^^^^^^^^^^^^^^^^^
>unwrap(value) : { prop1: "hello"; }
> : ^^^^^^^^^^^^^^^^^^^
>unwrap : <T>(wrapper: T) => Unwrap<T>
> : ^ ^^ ^^ ^^^^^
>value : Wrapper<{ prop1: Wrapper<"hello">; }>
> : ^^^^^^^^^^^^^^^^^ ^^^^

27 changes: 27 additions & 0 deletions tests/cases/compiler/declarationAssertionNodeNotReusedWhenTypeNotEquivalent1.ts
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// @strict: true
// @declaration: true
// @emitDeclarationOnly: true

type Wrapper<T> = {
_type: T;
};

declare function stringWrapper(): Wrapper<string>;

declare function objWrapper<T extends Record<string, Wrapper<any>>>(
obj: T,
): Wrapper<T>;

const value = objWrapper({
prop1: stringWrapper() as Wrapper<"hello">,
});

type Unwrap<T> = T extends Wrapper<any>
? T["_type"] extends Record<string, Wrapper<any>>
? { [Key in keyof T["_type"]]: Unwrap<T["_type"][Key]> }
: T["_type"]
: never;

declare function unwrap<T>(wrapper: T): Unwrap<T>;

export const unwrapped = unwrap(value);
36 changes: 36 additions & 0 deletions tests/cases/fourslash/quickInfoAssertionNodeNotReusedWhenTypeNotEquivalent1.ts
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/// <reference path="fourslash.ts" />

// https://github.com/microsoft/TypeScript/issues/60573

// @strict: true

//// type Wrapper<T> = {
//// _type: T;
//// };
////
//// function stringWrapper(): Wrapper<string> {
//// return { _type: "" };
//// }
////
//// function objWrapper<T extends Record<string, Wrapper<any>>>(
//// obj: T,
//// ): Wrapper<T> {
//// return { _type: obj };
//// }
////
//// const value = objWrapper({
//// prop1: stringWrapper() as Wrapper<"hello">,
//// });
////
//// type Unwrap<T extends Wrapper<any>> = T["_type"] extends Record<
//// string,
//// Wrapper<any>
//// >
//// ? { [Key in keyof T["_type"]]: Unwrap<T["_type"][Key]> }
//// : T["_type"];
////
//// type Test/*1*/ = Unwrap<typeof value>;

verify.quickInfoAt("1", `type Test = {
prop1: "hello";
}`)
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