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Relate sources to base constraints of mapped type generic indexed accesses #61677

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12 changes: 9 additions & 3 deletions src/compiler/checker.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -23515,9 +23515,15 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
const baseObjectType = getBaseConstraintOfType(objectType) || objectType;
const baseIndexType = getBaseConstraintOfType(indexType) || indexType;
if (!isGenericObjectType(baseObjectType) && !isGenericIndexType(baseIndexType)) {
const accessFlags = AccessFlags.Writing | (baseObjectType !== objectType ? AccessFlags.NoIndexSignatures : 0);
const constraint = getIndexedAccessTypeOrUndefined(baseObjectType, baseIndexType, accessFlags);
if (constraint) {
let constraint;
if (
isMappedTypeGenericIndexedAccess(target) &&
(constraint = getBaseConstraintOfType(target)) &&
(result = isRelatedTo(source, constraint, RecursionFlags.Target, /*reportErrors*/ false, /*headMessage*/ undefined, intersectionState))
) {
return result;
}
if (constraint = getIndexedAccessTypeOrUndefined(baseObjectType, baseIndexType, AccessFlags.Writing | (baseObjectType !== objectType ? AccessFlags.NoIndexSignatures : 0))) {
if (reportErrors && originalErrorInfo) {
// create a new chain for the constraint error
resetErrorInfo(saveErrorInfo);
Expand Down
93 changes: 93 additions & 0 deletions tests/baselines/reference/correlatedUnions2.symbols
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@@ -0,0 +1,93 @@
//// [tests/cases/compiler/correlatedUnions2.ts] ////

=== correlatedUnions2.ts ===
// https://github.com/microsoft/TypeScript/issues/61676

type Definitions = {
>Definitions : Symbol(Definitions, Decl(correlatedUnions2.ts, 0, 0))

onFoo: [arg: number];
>onFoo : Symbol(onFoo, Decl(correlatedUnions2.ts, 2, 20))

onBar: [arg: string];
>onBar : Symbol(onBar, Decl(correlatedUnions2.ts, 3, 23))

};

type SomeCallbacks = {
>SomeCallbacks : Symbol(SomeCallbacks, Decl(correlatedUnions2.ts, 5, 2))

[K in keyof Definitions]: (...args: Definitions[K]) => void;
>K : Symbol(K, Decl(correlatedUnions2.ts, 8, 3))
>Definitions : Symbol(Definitions, Decl(correlatedUnions2.ts, 0, 0))
>args : Symbol(args, Decl(correlatedUnions2.ts, 8, 29))
>Definitions : Symbol(Definitions, Decl(correlatedUnions2.ts, 0, 0))
>K : Symbol(K, Decl(correlatedUnions2.ts, 8, 3))

};

const wrapCallback = <K extends keyof SomeCallbacks>(
>wrapCallback : Symbol(wrapCallback, Decl(correlatedUnions2.ts, 11, 5))
>K : Symbol(K, Decl(correlatedUnions2.ts, 11, 22))
>SomeCallbacks : Symbol(SomeCallbacks, Decl(correlatedUnions2.ts, 5, 2))

source: SomeCallbacks,
>source : Symbol(source, Decl(correlatedUnions2.ts, 11, 53))
>SomeCallbacks : Symbol(SomeCallbacks, Decl(correlatedUnions2.ts, 5, 2))

target: SomeCallbacks,
>target : Symbol(target, Decl(correlatedUnions2.ts, 12, 24))
>SomeCallbacks : Symbol(SomeCallbacks, Decl(correlatedUnions2.ts, 5, 2))

key: K,
>key : Symbol(key, Decl(correlatedUnions2.ts, 13, 24))
>K : Symbol(K, Decl(correlatedUnions2.ts, 11, 22))

) => {
const callback = source[key];
>callback : Symbol(callback, Decl(correlatedUnions2.ts, 16, 7))
>source : Symbol(source, Decl(correlatedUnions2.ts, 11, 53))
>key : Symbol(key, Decl(correlatedUnions2.ts, 13, 24))

target[key] = (...args) => {
>target : Symbol(target, Decl(correlatedUnions2.ts, 12, 24))
>key : Symbol(key, Decl(correlatedUnions2.ts, 13, 24))
>args : Symbol(args, Decl(correlatedUnions2.ts, 18, 17))

if (Math.random() > 0.5) {
>Math.random : Symbol(Math.random, Decl(lib.es5.d.ts, --, --))
>Math : Symbol(Math, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>random : Symbol(Math.random, Decl(lib.es5.d.ts, --, --))

return callback(...args);
>callback : Symbol(callback, Decl(correlatedUnions2.ts, 16, 7))
>args : Symbol(args, Decl(correlatedUnions2.ts, 18, 17))
}
};
};

function wrapAll(callbacks: SomeCallbacks): SomeCallbacks {
>wrapAll : Symbol(wrapAll, Decl(correlatedUnions2.ts, 23, 2))
>callbacks : Symbol(callbacks, Decl(correlatedUnions2.ts, 25, 17))
>SomeCallbacks : Symbol(SomeCallbacks, Decl(correlatedUnions2.ts, 5, 2))
>SomeCallbacks : Symbol(SomeCallbacks, Decl(correlatedUnions2.ts, 5, 2))

const wrapped = {} as SomeCallbacks;
>wrapped : Symbol(wrapped, Decl(correlatedUnions2.ts, 26, 7))
>SomeCallbacks : Symbol(SomeCallbacks, Decl(correlatedUnions2.ts, 5, 2))

for (let key in callbacks) {
>key : Symbol(key, Decl(correlatedUnions2.ts, 27, 10))
>callbacks : Symbol(callbacks, Decl(correlatedUnions2.ts, 25, 17))

wrapCallback(callbacks, wrapped, key as keyof SomeCallbacks);
>wrapCallback : Symbol(wrapCallback, Decl(correlatedUnions2.ts, 11, 5))
>callbacks : Symbol(callbacks, Decl(correlatedUnions2.ts, 25, 17))
>wrapped : Symbol(wrapped, Decl(correlatedUnions2.ts, 26, 7))
>key : Symbol(key, Decl(correlatedUnions2.ts, 27, 10))
>SomeCallbacks : Symbol(SomeCallbacks, Decl(correlatedUnions2.ts, 5, 2))
}
return wrapped;
>wrapped : Symbol(wrapped, Decl(correlatedUnions2.ts, 26, 7))
}

138 changes: 138 additions & 0 deletions tests/baselines/reference/correlatedUnions2.types
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Original file line number Diff line number Diff line change
@@ -0,0 +1,138 @@
//// [tests/cases/compiler/correlatedUnions2.ts] ////

=== correlatedUnions2.ts ===
// https://github.com/microsoft/TypeScript/issues/61676

type Definitions = {
>Definitions : Definitions
> : ^^^^^^^^^^^

onFoo: [arg: number];
>onFoo : [arg: number]
> : ^^^^^^^^^^^^^

onBar: [arg: string];
>onBar : [arg: string]
> : ^^^^^^^^^^^^^

};

type SomeCallbacks = {
>SomeCallbacks : SomeCallbacks
> : ^^^^^^^^^^^^^

[K in keyof Definitions]: (...args: Definitions[K]) => void;
>args : Definitions[K]
> : ^^^^^^^^^^^^^^

};

const wrapCallback = <K extends keyof SomeCallbacks>(
>wrapCallback : <K extends keyof SomeCallbacks>(source: SomeCallbacks, target: SomeCallbacks, key: K) => void
> : ^ ^^^^^^^^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^^^^^^^^
><K extends keyof SomeCallbacks>( source: SomeCallbacks, target: SomeCallbacks, key: K,) => { const callback = source[key]; target[key] = (...args) => { if (Math.random() > 0.5) { return callback(...args); } };} : <K extends keyof SomeCallbacks>(source: SomeCallbacks, target: SomeCallbacks, key: K) => void
> : ^ ^^^^^^^^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^^^^^^^^

source: SomeCallbacks,
>source : SomeCallbacks
> : ^^^^^^^^^^^^^

target: SomeCallbacks,
>target : SomeCallbacks
> : ^^^^^^^^^^^^^

key: K,
>key : K
> : ^

) => {
const callback = source[key];
>callback : SomeCallbacks[K]
> : ^^^^^^^^^^^^^^^^
>source[key] : SomeCallbacks[K]
> : ^^^^^^^^^^^^^^^^
>source : SomeCallbacks
> : ^^^^^^^^^^^^^
>key : K
> : ^

target[key] = (...args) => {
>target[key] = (...args) => { if (Math.random() > 0.5) { return callback(...args); } } : (...args: Definitions[K]) => void
> : ^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^
>target[key] : SomeCallbacks[K]
> : ^^^^^^^^^^^^^^^^
>target : SomeCallbacks
> : ^^^^^^^^^^^^^
>key : K
> : ^
>(...args) => { if (Math.random() > 0.5) { return callback(...args); } } : (...args: Definitions[K]) => void
> : ^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^
>args : Definitions[K]
> : ^^^^^^^^^^^^^^

if (Math.random() > 0.5) {
>Math.random() > 0.5 : boolean
> : ^^^^^^^
>Math.random() : number
> : ^^^^^^
>Math.random : () => number
> : ^^^^^^
>Math : Math
> : ^^^^
>random : () => number
> : ^^^^^^
>0.5 : 0.5
> : ^^^

return callback(...args);
>callback(...args) : void
> : ^^^^
>callback : SomeCallbacks[K]
> : ^^^^^^^^^^^^^^^^
>...args : string | number
> : ^^^^^^^^^^^^^^^
>args : Definitions[K]
> : ^^^^^^^^^^^^^^
}
};
};

function wrapAll(callbacks: SomeCallbacks): SomeCallbacks {
>wrapAll : (callbacks: SomeCallbacks) => SomeCallbacks
> : ^ ^^ ^^^^^
>callbacks : SomeCallbacks
> : ^^^^^^^^^^^^^

const wrapped = {} as SomeCallbacks;
>wrapped : SomeCallbacks
> : ^^^^^^^^^^^^^
>{} as SomeCallbacks : SomeCallbacks
> : ^^^^^^^^^^^^^
>{} : {}
> : ^^

for (let key in callbacks) {
>key : string
> : ^^^^^^
>callbacks : SomeCallbacks
> : ^^^^^^^^^^^^^

wrapCallback(callbacks, wrapped, key as keyof SomeCallbacks);
>wrapCallback(callbacks, wrapped, key as keyof SomeCallbacks) : void
> : ^^^^
>wrapCallback : <K extends keyof SomeCallbacks>(source: SomeCallbacks, target: SomeCallbacks, key: K) => void
> : ^ ^^^^^^^^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^^^^^^^^
>callbacks : SomeCallbacks
> : ^^^^^^^^^^^^^
>wrapped : SomeCallbacks
> : ^^^^^^^^^^^^^
>key as keyof SomeCallbacks : keyof Definitions
> : ^^^^^^^^^^^^^^^^^
>key : string
> : ^^^^^^
}
return wrapped;
>wrapped : SomeCallbacks
> : ^^^^^^^^^^^^^
}

96 changes: 96 additions & 0 deletions tests/baselines/reference/correlatedUnions3.symbols
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Original file line number Diff line number Diff line change
@@ -0,0 +1,96 @@
//// [tests/cases/compiler/correlatedUnions3.ts] ////

=== correlatedUnions3.ts ===
type Definitions = {
>Definitions : Symbol(Definitions, Decl(correlatedUnions3.ts, 0, 0))

onFoo: [arg: number];
>onFoo : Symbol(onFoo, Decl(correlatedUnions3.ts, 0, 20))

onBar: [arg: string];
>onBar : Symbol(onBar, Decl(correlatedUnions3.ts, 1, 23))

};

type SomeCallbacks = {
>SomeCallbacks : Symbol(SomeCallbacks, Decl(correlatedUnions3.ts, 3, 2))

[K in keyof Definitions]?: (...args: Definitions[K]) => void;
>K : Symbol(K, Decl(correlatedUnions3.ts, 6, 3))
>Definitions : Symbol(Definitions, Decl(correlatedUnions3.ts, 0, 0))
>args : Symbol(args, Decl(correlatedUnions3.ts, 6, 30))
>Definitions : Symbol(Definitions, Decl(correlatedUnions3.ts, 0, 0))
>K : Symbol(K, Decl(correlatedUnions3.ts, 6, 3))

};

const wrapCallback = <K extends keyof SomeCallbacks>(
>wrapCallback : Symbol(wrapCallback, Decl(correlatedUnions3.ts, 9, 5))
>K : Symbol(K, Decl(correlatedUnions3.ts, 9, 22))
>SomeCallbacks : Symbol(SomeCallbacks, Decl(correlatedUnions3.ts, 3, 2))

source: SomeCallbacks,
>source : Symbol(source, Decl(correlatedUnions3.ts, 9, 53))
>SomeCallbacks : Symbol(SomeCallbacks, Decl(correlatedUnions3.ts, 3, 2))

target: SomeCallbacks,
>target : Symbol(target, Decl(correlatedUnions3.ts, 10, 24))
>SomeCallbacks : Symbol(SomeCallbacks, Decl(correlatedUnions3.ts, 3, 2))

key: K,
>key : Symbol(key, Decl(correlatedUnions3.ts, 11, 24))
>K : Symbol(K, Decl(correlatedUnions3.ts, 9, 22))

) => {
const callback = source[key];
>callback : Symbol(callback, Decl(correlatedUnions3.ts, 14, 7))
>source : Symbol(source, Decl(correlatedUnions3.ts, 9, 53))
>key : Symbol(key, Decl(correlatedUnions3.ts, 11, 24))

target[key] =
>target : Symbol(target, Decl(correlatedUnions3.ts, 10, 24))
>key : Symbol(key, Decl(correlatedUnions3.ts, 11, 24))

callback &&
>callback : Symbol(callback, Decl(correlatedUnions3.ts, 14, 7))

((...args) => {
>args : Symbol(args, Decl(correlatedUnions3.ts, 17, 6))

if (Math.random() > 0.5) {
>Math.random : Symbol(Math.random, Decl(lib.es5.d.ts, --, --))
>Math : Symbol(Math, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>random : Symbol(Math.random, Decl(lib.es5.d.ts, --, --))

return callback(...args);
>callback : Symbol(callback, Decl(correlatedUnions3.ts, 14, 7))
>args : Symbol(args, Decl(correlatedUnions3.ts, 17, 6))
}
});
};

function wrapAll(callbacks: SomeCallbacks): SomeCallbacks {
>wrapAll : Symbol(wrapAll, Decl(correlatedUnions3.ts, 22, 2))
>callbacks : Symbol(callbacks, Decl(correlatedUnions3.ts, 24, 17))
>SomeCallbacks : Symbol(SomeCallbacks, Decl(correlatedUnions3.ts, 3, 2))
>SomeCallbacks : Symbol(SomeCallbacks, Decl(correlatedUnions3.ts, 3, 2))

const wrapped: SomeCallbacks = {};
>wrapped : Symbol(wrapped, Decl(correlatedUnions3.ts, 25, 7))
>SomeCallbacks : Symbol(SomeCallbacks, Decl(correlatedUnions3.ts, 3, 2))

for (let key in callbacks) {
>key : Symbol(key, Decl(correlatedUnions3.ts, 26, 10))
>callbacks : Symbol(callbacks, Decl(correlatedUnions3.ts, 24, 17))

wrapCallback(callbacks, wrapped, key as keyof SomeCallbacks);
>wrapCallback : Symbol(wrapCallback, Decl(correlatedUnions3.ts, 9, 5))
>callbacks : Symbol(callbacks, Decl(correlatedUnions3.ts, 24, 17))
>wrapped : Symbol(wrapped, Decl(correlatedUnions3.ts, 25, 7))
>key : Symbol(key, Decl(correlatedUnions3.ts, 26, 10))
>SomeCallbacks : Symbol(SomeCallbacks, Decl(correlatedUnions3.ts, 3, 2))
}
return wrapped;
>wrapped : Symbol(wrapped, Decl(correlatedUnions3.ts, 25, 7))
}

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