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Fixed single signature type instantiations leaking between calls with different mappers #59972

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Fixed single signature type instantiations leaking between calls with different mappers #59972

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c8d92fa
Fixed single signature type instantiations leaking between calls with…
Andarist Sep 15, 2024
0a0e499
Merge remote-tracking branch 'origin/main' into fix/single-signature-…
Andarist Jan 23, 2025
12a5fba
add extra test case
Andarist Jan 23, 2025
e1eb82c
update baseline
Andarist Jan 23, 2025
bd42209
Merge remote-tracking branch 'origin/main' into fix/single-signature-…
Andarist Apr 30, 2025
06bbb9b
add test case
Andarist Apr 30, 2025
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12 changes: 5 additions & 7 deletions src/compiler/checker.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -20515,7 +20515,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
const links = getNodeLinks(declaration);
const target = type.objectFlags & ObjectFlags.Reference ? links.resolvedType! as DeferredTypeReference :
type.objectFlags & ObjectFlags.Instantiated ? type.target! : type;
let typeParameters = type.objectFlags & ObjectFlags.SingleSignatureType ? (type as SingleSignatureType).outerTypeParameters : links.outerTypeParameters;
let typeParameters = links.outerTypeParameters;
if (!typeParameters) {
// The first time an anonymous type is instantiated we compute and store a list of the type
// parameters that are in scope (and therefore potentially referenced). For type literals that
Expand All @@ -20541,18 +20541,13 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
const typeArguments = map(typeParameters, t => getMappedType(t, combinedMapper));
const newAliasSymbol = aliasSymbol || type.aliasSymbol;
const newAliasTypeArguments = aliasSymbol ? aliasTypeArguments : instantiateTypes(type.aliasTypeArguments, mapper);
const id = (type.objectFlags & ObjectFlags.SingleSignatureType ? "S" : "") + getTypeListId(typeArguments) + getAliasId(newAliasSymbol, newAliasTypeArguments);
const id = getTypeListId(typeArguments) + getAliasId(newAliasSymbol, newAliasTypeArguments);
if (!target.instantiations) {
target.instantiations = new Map<string, Type>();
target.instantiations.set(getTypeListId(typeParameters) + getAliasId(target.aliasSymbol, target.aliasTypeArguments), target);
}
let result = target.instantiations.get(id);
if (!result) {
if (type.objectFlags & ObjectFlags.SingleSignatureType) {
result = instantiateAnonymousType(type, mapper);
target.instantiations.set(id, result);
return result;
}
const newMapper = createTypeMapper(typeParameters, typeArguments);
result = target.objectFlags & ObjectFlags.Reference ? createDeferredTypeReference((type as DeferredTypeReference).target, (type as DeferredTypeReference).node, newMapper, newAliasSymbol, newAliasTypeArguments) :
target.objectFlags & ObjectFlags.Mapped ? instantiateMappedType(target as MappedType, newMapper, newAliasSymbol, newAliasTypeArguments) :
Expand Down Expand Up @@ -20830,6 +20825,9 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
if (objectFlags & ObjectFlags.ReverseMapped) {
return instantiateReverseMappedType(type as ReverseMappedType, mapper);
}
if (objectFlags & ObjectFlags.SingleSignatureType) {
return instantiateAnonymousType(type as SingleSignatureType, mapper);
}
return getObjectTypeInstantiation(type as TypeReference | AnonymousType | MappedType, mapper, aliasSymbol, aliasTypeArguments);
}
return type;
Expand Down
173 changes: 173 additions & 0 deletions tests/baselines/reference/genericCallInferenceInConditionalTypes1.symbols
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@@ -0,0 +1,173 @@
//// [tests/cases/compiler/genericCallInferenceInConditionalTypes1.ts] ////

=== genericCallInferenceInConditionalTypes1.ts ===
// https://github.com/microsoft/TypeScript/issues/59937

type Ref<T> = {
>Ref : Symbol(Ref, Decl(genericCallInferenceInConditionalTypes1.ts, 0, 0))
>T : Symbol(T, Decl(genericCallInferenceInConditionalTypes1.ts, 2, 9))

current: T;
>current : Symbol(current, Decl(genericCallInferenceInConditionalTypes1.ts, 2, 15))
>T : Symbol(T, Decl(genericCallInferenceInConditionalTypes1.ts, 2, 9))

};

type FunctionComponent<P> = (props: P) => unknown;
>FunctionComponent : Symbol(FunctionComponent, Decl(genericCallInferenceInConditionalTypes1.ts, 4, 2))
>P : Symbol(P, Decl(genericCallInferenceInConditionalTypes1.ts, 6, 23))
>props : Symbol(props, Decl(genericCallInferenceInConditionalTypes1.ts, 6, 29))
>P : Symbol(P, Decl(genericCallInferenceInConditionalTypes1.ts, 6, 23))

type ComponentProps<T extends FunctionComponent<any>> =
>ComponentProps : Symbol(ComponentProps, Decl(genericCallInferenceInConditionalTypes1.ts, 6, 50))
>T : Symbol(T, Decl(genericCallInferenceInConditionalTypes1.ts, 8, 20))
>FunctionComponent : Symbol(FunctionComponent, Decl(genericCallInferenceInConditionalTypes1.ts, 4, 2))

T extends FunctionComponent<infer P> ? P : {};
>T : Symbol(T, Decl(genericCallInferenceInConditionalTypes1.ts, 8, 20))
>FunctionComponent : Symbol(FunctionComponent, Decl(genericCallInferenceInConditionalTypes1.ts, 4, 2))
>P : Symbol(P, Decl(genericCallInferenceInConditionalTypes1.ts, 9, 35))
>P : Symbol(P, Decl(genericCallInferenceInConditionalTypes1.ts, 9, 35))

type PropsWithoutRef<P> = P extends any
>PropsWithoutRef : Symbol(PropsWithoutRef, Decl(genericCallInferenceInConditionalTypes1.ts, 9, 48))
>P : Symbol(P, Decl(genericCallInferenceInConditionalTypes1.ts, 11, 21))
>P : Symbol(P, Decl(genericCallInferenceInConditionalTypes1.ts, 11, 21))

? "ref" extends keyof P
>P : Symbol(P, Decl(genericCallInferenceInConditionalTypes1.ts, 11, 21))

? Omit<P, "ref">
>Omit : Symbol(Omit, Decl(lib.es5.d.ts, --, --))
>P : Symbol(P, Decl(genericCallInferenceInConditionalTypes1.ts, 11, 21))

: P
>P : Symbol(P, Decl(genericCallInferenceInConditionalTypes1.ts, 11, 21))

: P;
>P : Symbol(P, Decl(genericCallInferenceInConditionalTypes1.ts, 11, 21))

type ComponentPropsWithoutRef<T extends FunctionComponent<any>> =
>ComponentPropsWithoutRef : Symbol(ComponentPropsWithoutRef, Decl(genericCallInferenceInConditionalTypes1.ts, 15, 6))
>T : Symbol(T, Decl(genericCallInferenceInConditionalTypes1.ts, 17, 30))
>FunctionComponent : Symbol(FunctionComponent, Decl(genericCallInferenceInConditionalTypes1.ts, 4, 2))

PropsWithoutRef<ComponentProps<T>>;
>PropsWithoutRef : Symbol(PropsWithoutRef, Decl(genericCallInferenceInConditionalTypes1.ts, 9, 48))
>ComponentProps : Symbol(ComponentProps, Decl(genericCallInferenceInConditionalTypes1.ts, 6, 50))
>T : Symbol(T, Decl(genericCallInferenceInConditionalTypes1.ts, 17, 30))

declare function forwardRef<T, P>(
>forwardRef : Symbol(forwardRef, Decl(genericCallInferenceInConditionalTypes1.ts, 18, 37))
>T : Symbol(T, Decl(genericCallInferenceInConditionalTypes1.ts, 20, 28))
>P : Symbol(P, Decl(genericCallInferenceInConditionalTypes1.ts, 20, 30))

component: (props: P, ref: Ref<T>) => unknown,
>component : Symbol(component, Decl(genericCallInferenceInConditionalTypes1.ts, 20, 34))
>props : Symbol(props, Decl(genericCallInferenceInConditionalTypes1.ts, 21, 14))
>P : Symbol(P, Decl(genericCallInferenceInConditionalTypes1.ts, 20, 30))
>ref : Symbol(ref, Decl(genericCallInferenceInConditionalTypes1.ts, 21, 23))
>Ref : Symbol(Ref, Decl(genericCallInferenceInConditionalTypes1.ts, 0, 0))
>T : Symbol(T, Decl(genericCallInferenceInConditionalTypes1.ts, 20, 28))

): (props: P & { ref?: Ref<T> }) => unknown;
>props : Symbol(props, Decl(genericCallInferenceInConditionalTypes1.ts, 22, 4))
>P : Symbol(P, Decl(genericCallInferenceInConditionalTypes1.ts, 20, 30))
>ref : Symbol(ref, Decl(genericCallInferenceInConditionalTypes1.ts, 22, 16))
>Ref : Symbol(Ref, Decl(genericCallInferenceInConditionalTypes1.ts, 0, 0))
>T : Symbol(T, Decl(genericCallInferenceInConditionalTypes1.ts, 20, 28))

const ComponentWithForwardRef = forwardRef(
>ComponentWithForwardRef : Symbol(ComponentWithForwardRef, Decl(genericCallInferenceInConditionalTypes1.ts, 24, 5))
>forwardRef : Symbol(forwardRef, Decl(genericCallInferenceInConditionalTypes1.ts, 18, 37))

<T extends FunctionComponent<any>>(
>T : Symbol(T, Decl(genericCallInferenceInConditionalTypes1.ts, 25, 3))
>FunctionComponent : Symbol(FunctionComponent, Decl(genericCallInferenceInConditionalTypes1.ts, 4, 2))

props: ComponentPropsWithoutRef<T>,
>props : Symbol(props, Decl(genericCallInferenceInConditionalTypes1.ts, 25, 37))
>ComponentPropsWithoutRef : Symbol(ComponentPropsWithoutRef, Decl(genericCallInferenceInConditionalTypes1.ts, 15, 6))
>T : Symbol(T, Decl(genericCallInferenceInConditionalTypes1.ts, 25, 3))

ref: Ref<HTMLElement>,
>ref : Symbol(ref, Decl(genericCallInferenceInConditionalTypes1.ts, 26, 39))
>Ref : Symbol(Ref, Decl(genericCallInferenceInConditionalTypes1.ts, 0, 0))
>HTMLElement : Symbol(HTMLElement, Decl(lib.dom.d.ts, --, --), Decl(lib.dom.d.ts, --, --))

) => {
return null;
},
);

type Test<T> = T extends { component?: infer Component }
>Test : Symbol(Test, Decl(genericCallInferenceInConditionalTypes1.ts, 31, 2))
>T : Symbol(T, Decl(genericCallInferenceInConditionalTypes1.ts, 33, 10))
>T : Symbol(T, Decl(genericCallInferenceInConditionalTypes1.ts, 33, 10))
>component : Symbol(component, Decl(genericCallInferenceInConditionalTypes1.ts, 33, 26))
>Component : Symbol(Component, Decl(genericCallInferenceInConditionalTypes1.ts, 33, 44))

? Component extends FunctionComponent<any>
>Component : Symbol(Component, Decl(genericCallInferenceInConditionalTypes1.ts, 33, 44))
>FunctionComponent : Symbol(FunctionComponent, Decl(genericCallInferenceInConditionalTypes1.ts, 4, 2))

? ComponentProps<Component>
>ComponentProps : Symbol(ComponentProps, Decl(genericCallInferenceInConditionalTypes1.ts, 6, 50))
>Component : Symbol(Component, Decl(genericCallInferenceInConditionalTypes1.ts, 33, 44))

: never
: never;

// the first one here has a chance to pollute the cache
type Result1 = ComponentProps<typeof ComponentWithForwardRef>;
>Result1 : Symbol(Result1, Decl(genericCallInferenceInConditionalTypes1.ts, 37, 10))
>ComponentProps : Symbol(ComponentProps, Decl(genericCallInferenceInConditionalTypes1.ts, 6, 50))
>ComponentWithForwardRef : Symbol(ComponentWithForwardRef, Decl(genericCallInferenceInConditionalTypes1.ts, 24, 5))

// that could be incorrectly reused by this one
type Result2 = Test<{ component: typeof ComponentWithForwardRef }>; // no `T` leak
>Result2 : Symbol(Result2, Decl(genericCallInferenceInConditionalTypes1.ts, 40, 62))
>Test : Symbol(Test, Decl(genericCallInferenceInConditionalTypes1.ts, 31, 2))
>component : Symbol(component, Decl(genericCallInferenceInConditionalTypes1.ts, 42, 21))
>ComponentWithForwardRef : Symbol(ComponentWithForwardRef, Decl(genericCallInferenceInConditionalTypes1.ts, 24, 5))

// same as ComponentWithForwardRef above but using a resolved signature instead of a direct inferred result of `forwardRef`
declare const ComponentWithForwardRef2: <T extends FunctionComponent<any>>(
>ComponentWithForwardRef2 : Symbol(ComponentWithForwardRef2, Decl(genericCallInferenceInConditionalTypes1.ts, 45, 13))
>T : Symbol(T, Decl(genericCallInferenceInConditionalTypes1.ts, 45, 41))
>FunctionComponent : Symbol(FunctionComponent, Decl(genericCallInferenceInConditionalTypes1.ts, 4, 2))

props: PropsWithoutRef<ComponentProps<T>> & {
>props : Symbol(props, Decl(genericCallInferenceInConditionalTypes1.ts, 45, 75))
>PropsWithoutRef : Symbol(PropsWithoutRef, Decl(genericCallInferenceInConditionalTypes1.ts, 9, 48))
>ComponentProps : Symbol(ComponentProps, Decl(genericCallInferenceInConditionalTypes1.ts, 6, 50))
>T : Symbol(T, Decl(genericCallInferenceInConditionalTypes1.ts, 45, 41))

className?: string;
>className : Symbol(className, Decl(genericCallInferenceInConditionalTypes1.ts, 46, 47))

as?: T | undefined;
>as : Symbol(as, Decl(genericCallInferenceInConditionalTypes1.ts, 47, 23))
>T : Symbol(T, Decl(genericCallInferenceInConditionalTypes1.ts, 45, 41))

} & {
ref?: Ref<HTMLElement> | undefined;
>ref : Symbol(ref, Decl(genericCallInferenceInConditionalTypes1.ts, 49, 7))
>Ref : Symbol(Ref, Decl(genericCallInferenceInConditionalTypes1.ts, 0, 0))
>HTMLElement : Symbol(HTMLElement, Decl(lib.dom.d.ts, --, --), Decl(lib.dom.d.ts, --, --))

},
) => unknown;

type Result3 = ComponentProps<typeof ComponentWithForwardRef2>;
>Result3 : Symbol(Result3, Decl(genericCallInferenceInConditionalTypes1.ts, 52, 13))
>ComponentProps : Symbol(ComponentProps, Decl(genericCallInferenceInConditionalTypes1.ts, 6, 50))
>ComponentWithForwardRef2 : Symbol(ComponentWithForwardRef2, Decl(genericCallInferenceInConditionalTypes1.ts, 45, 13))

type Result4 = Test<{ component: typeof ComponentWithForwardRef2 }>;
>Result4 : Symbol(Result4, Decl(genericCallInferenceInConditionalTypes1.ts, 54, 63))
>Test : Symbol(Test, Decl(genericCallInferenceInConditionalTypes1.ts, 31, 2))
>component : Symbol(component, Decl(genericCallInferenceInConditionalTypes1.ts, 55, 21))
>ComponentWithForwardRef2 : Symbol(ComponentWithForwardRef2, Decl(genericCallInferenceInConditionalTypes1.ts, 45, 13))

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