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fix(52514): overload Tags do not receive noImplicitAny errors on missing return types #52518

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Jan 31, 2023
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11 changes: 10 additions & 1 deletion src/compiler/checker.ts
Original file line number Diff line number Diff line change
Expand Up @@ -14446,7 +14446,11 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
if (node.tags) {
for (const tag of node.tags) {
if (isJSDocOverloadTag(tag)) {
result.push(getSignatureFromDeclaration(tag.typeExpression));
const jsDocSignature = tag.typeExpression;
if (jsDocSignature.type === undefined) {
reportImplicitAny(jsDocSignature, anyType);
}
result.push(getSignatureFromDeclaration(jsDocSignature));
hasJSDocOverloads = true;
}
}
Expand Down Expand Up @@ -23419,6 +23423,11 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
case SyntaxKind.JSDocFunctionType:
error(declaration, Diagnostics.Function_type_which_lacks_return_type_annotation_implicitly_has_an_0_return_type, typeAsString);
return;
case SyntaxKind.JSDocSignature:
if (noImplicitAny && isJSDocOverloadTag(declaration.parent)) {
error(declaration.parent.tagName, Diagnostics.This_overload_implicitly_returns_the_type_0_because_it_lacks_a_return_type_annotation, typeAsString);
}
return;
case SyntaxKind.FunctionDeclaration:
case SyntaxKind.MethodDeclaration:
case SyntaxKind.MethodSignature:
Expand Down
4 changes: 4 additions & 0 deletions src/compiler/diagnosticMessages.json
Original file line number Diff line number Diff line change
Expand Up @@ -6213,6 +6213,10 @@
"category": "Error",
"code": 7011
},
"This overload implicitly returns the type '{0}' because it lacks a return type annotation.": {
"category": "Error",
"code": 7012
},
"Construct signature, which lacks return-type annotation, implicitly has an 'any' return type.": {
"category": "Error",
"code": 7013
Expand Down
30 changes: 30 additions & 0 deletions tests/baselines/reference/jsFileMethodOverloads3.errors.txt
Original file line number Diff line number Diff line change
@@ -0,0 +1,30 @@
/a.js(2,5): error TS7012: This overload implicitly returns the type 'any' because it lacks a return type annotation.
/a.js(7,5): error TS7012: This overload implicitly returns the type 'any' because it lacks a return type annotation.


==== /a.js (2 errors) ====
/**
* @overload
~~~~~~~~
!!! error TS7012: This overload implicitly returns the type 'any' because it lacks a return type annotation.
* @param {number} x
*/

/**
* @overload
~~~~~~~~
!!! error TS7012: This overload implicitly returns the type 'any' because it lacks a return type annotation.
* @param {string} x
*/

/**
* @param {string | number} x
* @returns {string | number}
*/
function id(x) {
return x;
}

export let a = id(123);
export let b = id("hello");

31 changes: 31 additions & 0 deletions tests/baselines/reference/jsFileMethodOverloads3.symbols
Original file line number Diff line number Diff line change
@@ -0,0 +1,31 @@
=== /a.js ===
/**
* @overload
* @param {number} x
*/

/**
* @overload
* @param {string} x
*/

/**
* @param {string | number} x
* @returns {string | number}
*/
function id(x) {
>id : Symbol(id, Decl(a.js, 0, 0))
>x : Symbol(x, Decl(a.js, 14, 12))

return x;
>x : Symbol(x, Decl(a.js, 14, 12))
}

export let a = id(123);
>a : Symbol(a, Decl(a.js, 18, 10))
>id : Symbol(id, Decl(a.js, 0, 0))

export let b = id("hello");
>b : Symbol(b, Decl(a.js, 19, 10))
>id : Symbol(id, Decl(a.js, 0, 0))

35 changes: 35 additions & 0 deletions tests/baselines/reference/jsFileMethodOverloads3.types
Original file line number Diff line number Diff line change
@@ -0,0 +1,35 @@
=== /a.js ===
/**
* @overload
* @param {number} x
*/

/**
* @overload
* @param {string} x
*/

/**
* @param {string | number} x
* @returns {string | number}
*/
function id(x) {
>id : { (x: number): any; (x: string): any; }
>x : string | number

return x;
>x : string | number
}

export let a = id(123);
>a : any
>id(123) : any
>id : { (x: number): any; (x: string): any; }
>123 : 123

export let b = id("hello");
>b : any
>id("hello") : any
>id : { (x: number): any; (x: string): any; }
>"hello" : "hello"

Original file line number Diff line number Diff line change
Expand Up @@ -1363,6 +1363,7 @@ Info 32 [00:01:13.000] response:
"6931",
"7009",
"7011",
"7012",
"7013",
"7014",
"7015",
Expand Down Expand Up @@ -2711,6 +2712,7 @@ Info 38 [00:01:19.000] response:
"6931",
"7009",
"7011",
"7012",
"7013",
"7014",
"7015",
Expand Down Expand Up @@ -3971,6 +3973,7 @@ Info 40 [00:01:21.000] response:
"6931",
"7009",
"7011",
"7012",
"7013",
"7014",
"7015",
Expand Down
26 changes: 26 additions & 0 deletions tests/cases/compiler/jsFileMethodOverloads3.ts
Original file line number Diff line number Diff line change
@@ -0,0 +1,26 @@
// @noImplicitAny: true
// @allowJs: true
// @checkJs: true
// @noEmit: true
// @filename: /a.js

/**
* @overload
* @param {number} x
*/

/**
* @overload
* @param {string} x
*/

/**
* @param {string | number} x
* @returns {string | number}
*/
function id(x) {
return x;
}

export let a = id(123);
export let b = id("hello");