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Fixed contravariant inferences from annotated optional parameters#55397

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Merged
Wesley Wigham (weswigham) merged 2 commits into from
Aug 16, 2023
Merged

Fixed contravariant inferences from annotated optional parameters #55397

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6a188ae
Fixed contravariant inferences from annotated optional parameters
Andarist Aug 16, 2023
3edbe2e
Handle JSDoc annotations better
Andarist Aug 16, 2023
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4 changes: 3 additions & 1 deletion src/compiler/checker.ts
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Original file line numberDiff line numberDiff line change
Expand Up@@ -35120,7 +35120,9 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
if (declaration.type) {
const typeNode = getEffectiveTypeAnnotationNode(declaration);
if (typeNode) {
inferTypes(inferenceContext.inferences, getTypeFromTypeNode(typeNode), getTypeAtPosition(context, i));
const source = addOptionality(getTypeFromTypeNode(typeNode), /*isProperty*/ false, isOptionalDeclaration(declaration));

@weswighamWesley Wigham (weswigham)Aug 16, 2023

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hasQuestionToken(declaration) isn't going to do the right thing for jsdoc optional parameters - instead, use the catch-all isOptionalDeclaration.

@AndaristMateusz Burzyński (Andarist)Aug 16, 2023•
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👍 pushed out the appropriate change (and a test case)

const target = getTypeAtPosition(context, i);
inferTypes(inferenceContext.inferences, source, target);
}
}
}
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25 changes: 25 additions & 0 deletions tests/baselines/reference/contravariantOnlyInferenceWithAnnotatedOptionalParameter.symbols
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@@ -0,0 +1,25 @@
//// [tests/cases/compiler/contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts] ////

=== contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts ===
// repro https://github.com/microsoft/TypeScript/issues/55394

declare function filter<T>(predicate: (value: T, index: number) => boolean): T;
>filter : Symbol(filter, Decl(contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts, 0, 0))
>T : Symbol(T, Decl(contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts, 2, 24))
>predicate : Symbol(predicate, Decl(contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts, 2, 27))
>value : Symbol(value, Decl(contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts, 2, 39))
>T : Symbol(T, Decl(contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts, 2, 24))
>index : Symbol(index, Decl(contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts, 2, 48))
>T : Symbol(T, Decl(contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts, 2, 24))

const a = filter((pose?: number) => true);
>a : Symbol(a, Decl(contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts, 3, 5))
>filter : Symbol(filter, Decl(contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts, 0, 0))
>pose : Symbol(pose, Decl(contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts, 3, 18))

const b = filter((pose?: number, _?: number) => true);
>b : Symbol(b, Decl(contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts, 4, 5))
>filter : Symbol(filter, Decl(contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts, 0, 0))
>pose : Symbol(pose, Decl(contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts, 4, 18))
>_ : Symbol(_, Decl(contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts, 4, 32))

28 changes: 28 additions & 0 deletions tests/baselines/reference/contravariantOnlyInferenceWithAnnotatedOptionalParameter.types
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@@ -0,0 +1,28 @@
//// [tests/cases/compiler/contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts] ////

=== contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts ===
// repro https://github.com/microsoft/TypeScript/issues/55394

declare function filter<T>(predicate: (value: T, index: number) => boolean): T;
>filter : <T>(predicate: (value: T, index: number) => boolean) => T
>predicate : (value: T, index: number) => boolean
>value : T
>index : number

const a = filter((pose?: number) => true);
>a : number | undefined
>filter((pose?: number) => true) : number | undefined
>filter : <T>(predicate: (value: T, index: number) => boolean) => T
>(pose?: number) => true : (pose?: number) => true
>pose : number | undefined
>true : true

const b = filter((pose?: number, _?: number) => true);
>b : number | undefined
>filter((pose?: number, _?: number) => true) : number | undefined
>filter : <T>(predicate: (value: T, index: number) => boolean) => T
>(pose?: number, _?: number) => true : (pose?: number, _?: number) => true
>pose : number | undefined
>_ : number | undefined
>true : true

41 changes: 41 additions & 0 deletions tests/baselines/reference/contravariantOnlyInferenceWithAnnotatedOptionalParameterJs.symbols
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@@ -0,0 +1,41 @@
//// [tests/cases/compiler/contravariantOnlyInferenceWithAnnotatedOptionalParameterJs.ts] ////

=== index.js ===
/**
* @template T
* @param {(value: T, index: number) => boolean} predicate
* @returns {T}
*/
function filter(predicate) {
>filter : Symbol(filter, Decl(index.js, 0, 0))
>predicate : Symbol(predicate, Decl(index.js, 5, 16))

return /** @type {any} */ (null);
}

const a = filter(
>a : Symbol(a, Decl(index.js, 9, 5))
>filter : Symbol(filter, Decl(index.js, 0, 0))

/**
* @param {number} [pose]
*/
(pose) => true
>pose : Symbol(pose, Decl(index.js, 13, 3))

);

const b = filter(
>b : Symbol(b, Decl(index.js, 16, 5))
>filter : Symbol(filter, Decl(index.js, 0, 0))

/**
* @param {number} [pose]
* @param {number} [_]
*/
(pose, _) => true
>pose : Symbol(pose, Decl(index.js, 21, 3))
>_ : Symbol(_, Decl(index.js, 21, 8))

);

48 changes: 48 additions & 0 deletions tests/baselines/reference/contravariantOnlyInferenceWithAnnotatedOptionalParameterJs.types
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@@ -0,0 +1,48 @@
//// [tests/cases/compiler/contravariantOnlyInferenceWithAnnotatedOptionalParameterJs.ts] ////

=== index.js ===
/**
* @template T
* @param {(value: T, index: number) => boolean} predicate
* @returns {T}
*/
function filter(predicate) {
>filter : <T>(predicate: (value: T, index: number) => boolean) => T
>predicate : (value: T, index: number) => boolean

return /** @type {any} */ (null);
>(null) : any
}

const a = filter(
>a : number | undefined
>filter( /** * @param {number} [pose] */ (pose) => true) : number | undefined
>filter : <T>(predicate: (value: T, index: number) => boolean) => T

/**
* @param {number} [pose]
*/
(pose) => true
>(pose) => true : (pose?: number | undefined) => true
>pose : number | undefined
>true : true

);

const b = filter(
>b : number | undefined
>filter( /** * @param {number} [pose] * @param {number} [_] */ (pose, _) => true) : number | undefined
>filter : <T>(predicate: (value: T, index: number) => boolean) => T

/**
* @param {number} [pose]
* @param {number} [_]
*/
(pose, _) => true
>(pose, _) => true : (pose?: number | undefined, _?: number | undefined) => true
>pose : number | undefined
>_ : number | undefined
>true : true

);

8 changes: 8 additions & 0 deletions tests/cases/compiler/contravariantOnlyInferenceWithAnnotatedOptionalParameter.ts
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@@ -0,0 +1,8 @@
// @strict: true
// @noEmit: true

// repro https://github.com/microsoft/TypeScript/issues/55394

declare function filter<T>(predicate: (value: T, index: number) => boolean): T;
const a = filter((pose?: number) => true);
const b = filter((pose?: number, _?: number) => true);
29 changes: 29 additions & 0 deletions tests/cases/compiler/contravariantOnlyInferenceWithAnnotatedOptionalParameterJs.ts
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@@ -0,0 +1,29 @@
// @strict: true
// @checkJs: true
// @noEmit: true

// @filename: index.js

/**
* @template T
* @param {(value: T, index: number) => boolean} predicate
* @returns {T}
*/
function filter(predicate) {
return /** @type {any} */ (null);
}

const a = filter(
/**
* @param {number} [pose]
*/
(pose) => true
);

const b = filter(
/**
* @param {number} [pose]
* @param {number} [_]
*/
(pose, _) => true
);