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weswighamweswigham
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Walk up parenthesized type nodes when looking for the type alias hosting a node
1 parent b57b5fe commit d91c088

7 files changed

+175
-3
lines changed

‎src/compiler/checker.ts

Lines changed: 5 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -10868,7 +10868,11 @@ namespace ts {
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}
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function getAliasSymbolForTypeNode(node: TypeNode) {
10871-
return isTypeAlias(node.parent) ? getSymbolOfNode(node.parent) : undefined;
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let host = node.parent;
10872+
while (isParenthesizedTypeNode(host)) {
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host = host.parent;
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}
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return isTypeAlias(host) ? getSymbolOfNode(host) : undefined;
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}
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function getTypeArgumentsForAliasSymbol(symbol: Symbol | undefined) {

‎tests/baselines/reference/destructuringInFunctionType.types

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -18,7 +18,7 @@ type F1 = ([a, b, c]) => void;
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>c : any
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2020
type T2 = ({ a });
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>T2 : { a: any; }
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>T2 : T2
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>a : any
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type F2 = ({ a }) => void;

‎tests/baselines/reference/keyofIntersection.types

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -46,7 +46,7 @@ type Result3 = Example3<'x' | 'y'>; // "x" | "y"
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>Result3 : "x" | "y"
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type Example4<T extends string, U extends string> = (Record<T, any> & Record<U, any>);
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>Example4 : Record<T, any> & Record<U, any>
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>Example4 : Example4<T, U>
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5151
type Result4 = keyof Example4<'x', 'y'>; // "x" | "y"
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>Result4 : "x" | "y"

‎tests/baselines/reference/parenthesisDoesNotBlockAliasSymbolCreation.js

Lines changed: 49 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,49 @@
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//// [parenthesisDoesNotBlockAliasSymbolCreation.ts]
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export type InvalidKeys<K extends string|number|symbol> = { [P in K]? : never };
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export type InvalidKeys2<K extends string|number|symbol> = (
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{ [P in K]? : never }
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);
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export type A<T> = (
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T & InvalidKeys<"a">
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);
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export type A2<T> = (
11+
T & InvalidKeys2<"a">
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);
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export const a = null as A<{ x : number }>;
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export const a2 = null as A2<{ x : number }>;
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export const a3 = null as { x : number } & InvalidKeys<"a">;
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export const a4 = null as { x : number } & InvalidKeys2<"a">;
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//// [parenthesisDoesNotBlockAliasSymbolCreation.js]
21+
"use strict";
22+
exports.__esModule = true;
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exports.a = null;
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exports.a2 = null;
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exports.a3 = null;
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exports.a4 = null;
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//// [parenthesisDoesNotBlockAliasSymbolCreation.d.ts]
30+
export declare type InvalidKeys<K extends string | number | symbol> = {
31+
[P in K]?: never;
32+
};
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export declare type InvalidKeys2<K extends string | number | symbol> = ({
34+
[P in K]?: never;
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});
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export declare type A<T> = (T & InvalidKeys<"a">);
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export declare type A2<T> = (T & InvalidKeys2<"a">);
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export declare const a: A<{
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x: number;
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}>;
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export declare const a2: A2<{
42+
x: number;
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}>;
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export declare const a3: {
45+
x: number;
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} & InvalidKeys<"a">;
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export declare const a4: {
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x: number;
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} & InvalidKeys2<"a">;

‎tests/baselines/reference/parenthesisDoesNotBlockAliasSymbolCreation.symbols

Lines changed: 56 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,56 @@
1+
=== tests/cases/compiler/parenthesisDoesNotBlockAliasSymbolCreation.ts ===
2+
export type InvalidKeys<K extends string|number|symbol> = { [P in K]? : never };
3+
>InvalidKeys : Symbol(InvalidKeys, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 0, 0))
4+
>K : Symbol(K, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 0, 24))
5+
>P : Symbol(P, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 0, 61))
6+
>K : Symbol(K, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 0, 24))
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8+
export type InvalidKeys2<K extends string|number|symbol> = (
9+
>InvalidKeys2 : Symbol(InvalidKeys2, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 0, 80))
10+
>K : Symbol(K, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 1, 25))
11+
12+
{ [P in K]? : never }
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>P : Symbol(P, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 2, 7))
14+
>K : Symbol(K, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 1, 25))
15+
16+
);
17+
18+
export type A<T> = (
19+
>A : Symbol(A, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 3, 2))
20+
>T : Symbol(T, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 5, 14))
21+
22+
T & InvalidKeys<"a">
23+
>T : Symbol(T, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 5, 14))
24+
>InvalidKeys : Symbol(InvalidKeys, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 0, 0))
25+
26+
);
27+
export type A2<T> = (
28+
>A2 : Symbol(A2, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 7, 2))
29+
>T : Symbol(T, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 8, 15))
30+
31+
T & InvalidKeys2<"a">
32+
>T : Symbol(T, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 8, 15))
33+
>InvalidKeys2 : Symbol(InvalidKeys2, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 0, 80))
34+
35+
);
36+
37+
export const a = null as A<{ x : number }>;
38+
>a : Symbol(a, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 12, 12))
39+
>A : Symbol(A, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 3, 2))
40+
>x : Symbol(x, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 12, 28))
41+
42+
export const a2 = null as A2<{ x : number }>;
43+
>a2 : Symbol(a2, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 13, 12))
44+
>A2 : Symbol(A2, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 7, 2))
45+
>x : Symbol(x, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 13, 30))
46+
47+
export const a3 = null as { x : number } & InvalidKeys<"a">;
48+
>a3 : Symbol(a3, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 14, 12))
49+
>x : Symbol(x, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 14, 27))
50+
>InvalidKeys : Symbol(InvalidKeys, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 0, 0))
51+
52+
export const a4 = null as { x : number } & InvalidKeys2<"a">;
53+
>a4 : Symbol(a4, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 15, 12))
54+
>x : Symbol(x, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 15, 27))
55+
>InvalidKeys2 : Symbol(InvalidKeys2, Decl(parenthesisDoesNotBlockAliasSymbolCreation.ts, 0, 80))
56+

‎tests/baselines/reference/parenthesisDoesNotBlockAliasSymbolCreation.types

Lines changed: 45 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,45 @@
1+
=== tests/cases/compiler/parenthesisDoesNotBlockAliasSymbolCreation.ts ===
2+
export type InvalidKeys<K extends string|number|symbol> = { [P in K]? : never };
3+
>InvalidKeys : InvalidKeys<K>
4+
5+
export type InvalidKeys2<K extends string|number|symbol> = (
6+
>InvalidKeys2 : InvalidKeys2<K>
7+
8+
{ [P in K]? : never }
9+
);
10+
11+
export type A<T> = (
12+
>A : A<T>
13+
14+
T & InvalidKeys<"a">
15+
);
16+
export type A2<T> = (
17+
>A2 : A2<T>
18+
19+
T & InvalidKeys2<"a">
20+
);
21+
22+
export const a = null as A<{ x : number }>;
23+
>a : A<{ x: number; }>
24+
>null as A<{ x : number }> : A<{ x: number; }>
25+
>null : null
26+
>x : number
27+
28+
export const a2 = null as A2<{ x : number }>;
29+
>a2 : A2<{ x: number; }>
30+
>null as A2<{ x : number }> : A2<{ x: number; }>
31+
>null : null
32+
>x : number
33+
34+
export const a3 = null as { x : number } & InvalidKeys<"a">;
35+
>a3 : { x: number; } & InvalidKeys<"a">
36+
>null as { x : number } & InvalidKeys<"a"> : { x: number; } & InvalidKeys<"a">
37+
>null : null
38+
>x : number
39+
40+
export const a4 = null as { x : number } & InvalidKeys2<"a">;
41+
>a4 : { x: number; } & InvalidKeys2<"a">
42+
>null as { x : number } & InvalidKeys2<"a"> : { x: number; } & InvalidKeys2<"a">
43+
>null : null
44+
>x : number
45+

‎tests/cases/compiler/parenthesisDoesNotBlockAliasSymbolCreation.ts

Lines changed: 18 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,18 @@
1+
// @declaration: true
2+
3+
export type InvalidKeys<K extends string|number|symbol> = { [P in K]? : never };
4+
export type InvalidKeys2<K extends string|number|symbol> = (
5+
{ [P in K]? : never }
6+
);
7+
8+
export type A<T> = (
9+
T & InvalidKeys<"a">
10+
);
11+
export type A2<T> = (
12+
T & InvalidKeys2<"a">
13+
);
14+
15+
export const a = null as A<{ x : number }>;
16+
export const a2 = null as A2<{ x : number }>;
17+
export const a3 = null as { x : number } & InvalidKeys<"a">;
18+
export const a4 = null as { x : number } & InvalidKeys2<"a">;

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