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Fixed an issue with satisfies "resolving" generic types of references #60710

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Fixed an issue with satisfies "resolving" generic types of references #60710

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bcdb043
Fixed an issue with `satisfies` "resolving" generic types of references
Andarist Dec 7, 2024
049c013
fixed tests
Andarist Dec 7, 2024
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16 changes: 9 additions & 7 deletions src/compiler/checker.ts
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Expand Up @@ -1333,6 +1333,7 @@ export const enum CheckMode {
// e.g. in `const { a, ...rest } = foo`, when checking the type of `foo` to determine the type of `rest`,
// we need to preserve generic types instead of substituting them for constraints
TypeOnly = 1 << 6, // Called from getTypeOfExpression, diagnostics may be omitted
SatisfiesOutput = 1 << 7, // Used to get output type of a satisfies expression unaffected by narrowable types for references, used in combination with `ContextFlags.SkipSatisfies`
}

/** @internal */
Expand Down Expand Up @@ -29800,17 +29801,15 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
!!(type.flags & TypeFlags.Instantiable && !maybeTypeOfKind(getBaseConstraintOrType(type), TypeFlags.Nullable));
}

function hasContextualTypeWithNoGenericTypes(node: Node, checkMode: CheckMode | undefined) {
function hasContextualTypeWithNoGenericTypes(node: Node, checkMode = CheckMode.Normal) {
// Computing the contextual type for a child of a JSX element involves resolving the type of the
// element's tag name, so we exclude that here to avoid circularities.
// If check mode has `CheckMode.RestBindingElement`, we skip binding pattern contextual types,
// as we want the type of a rest element to be generic when possible.
const contextualType = (isIdentifier(node) || isPropertyAccessExpression(node) || isElementAccessExpression(node)) &&
!((isJsxOpeningElement(node.parent) || isJsxSelfClosingElement(node.parent)) && node.parent.tagName === node) &&
(checkMode && checkMode & CheckMode.RestBindingElement ?
getContextualType(node, ContextFlags.SkipBindingPatterns)
: getContextualType(node, /*contextFlags*/ undefined));
return contextualType && !isGenericType(contextualType);
getContextualType(node, (checkMode & CheckMode.RestBindingElement ? ContextFlags.SkipBindingPatterns : 0) | (checkMode & CheckMode.SatisfiesOutput ? ContextFlags.SkipSatisfies : 0));
return contextualType && !(contextualType.flags & TypeFlags.Any) && !isGenericType(contextualType);
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The added !(contextualType.flags & TypeFlags.Any) bit here isn't exactly related to satisfies at all. I have added it to account for auto types, that affected all the baselines that had any as the contextual type in a few places. It also affected those codefixes for missing function declarations since the error type (a special kind of any) was the contextual type for those arguments here. I think those changes are positive

}

function getNarrowableTypeForReference(type: Type, reference: Node, checkMode?: CheckMode, forReturnTypeNarrowing?: boolean) {
Expand Down Expand Up @@ -32190,6 +32189,9 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
case SyntaxKind.NonNullExpression:
return getContextualType(parent as NonNullExpression, contextFlags);
case SyntaxKind.SatisfiesExpression:
if (contextFlags && contextFlags & ContextFlags.SkipSatisfies) {
return getContextualType(parent as SatisfiesExpression, contextFlags);
}
return getTypeFromTypeNode((parent as SatisfiesExpression).type);
case SyntaxKind.ExportAssignment:
return tryGetTypeFromEffectiveTypeNode(parent as ExportAssignment);
Expand Down Expand Up @@ -37573,15 +37575,15 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
return checkSatisfiesExpressionWorker(node.expression, node.type);
}

function checkSatisfiesExpressionWorker(expression: Expression, target: TypeNode, checkMode?: CheckMode) {
function checkSatisfiesExpressionWorker(expression: Expression, target: TypeNode, checkMode = CheckMode.Normal) {
const exprType = checkExpression(expression, checkMode);
const targetType = getTypeFromTypeNode(target);
if (isErrorType(targetType)) {
return targetType;
}
const errorNode = findAncestor(target.parent, n => n.kind === SyntaxKind.SatisfiesExpression || n.kind === SyntaxKind.JSDocSatisfiesTag);
checkTypeAssignableToAndOptionallyElaborate(exprType, targetType, errorNode, expression, Diagnostics.Type_0_does_not_satisfy_the_expected_type_1);
return exprType;
return checkExpression(expression, checkMode | CheckMode.SatisfiesOutput);
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exprType is used to check the assignability, it may contain "resolved" types for narrowable references. So the assignability works like it works in:

const x: "A" = genericReferenceNarrowedDownToA;

But the output type is different because we should propagate that "resolved" type in:

// actual on main: `"A"`
// expected: `AB extends "A" | "B"`
const x = genericReferenceNarrowedDownToA satisfies "A";

}

function checkMetaProperty(node: MetaProperty): Type {
Expand Down
9 changes: 5 additions & 4 deletions src/compiler/types.ts
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Expand Up @@ -5462,11 +5462,12 @@ export const enum IntersectionFlags {
// dprint-ignore
/** @internal */
export const enum ContextFlags {
None = 0,
Signature = 1 << 0, // Obtaining contextual signature
NoConstraints = 1 << 1, // Don't obtain type variable constraints
Completions = 1 << 2, // Ignore inference to current node and parent nodes out to the containing call for completions
None = 0,
Signature = 1 << 0, // Obtaining contextual signature
NoConstraints = 1 << 1, // Don't obtain type variable constraints
Completions = 1 << 2, // Ignore inference to current node and parent nodes out to the containing call for completions
SkipBindingPatterns = 1 << 3, // Ignore contextual types applied by binding patterns
SkipSatisfies = 1 << 4, // Ignore contextual types applied by `satisfies` types
}

// NOTE: If modifying this enum, must modify `TypeFormatFlags` too!
Expand Down
41 changes: 41 additions & 0 deletions tests/baselines/reference/controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.symbols
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@@ -0,0 +1,41 @@
//// [tests/cases/compiler/controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts] ////

=== controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts ===
const foo_autoType = <T extends 1 | 2>(bar: T) => {
>foo_autoType : Symbol(foo_autoType, Decl(controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts, 0, 5))
>T : Symbol(T, Decl(controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts, 0, 22))
>bar : Symbol(bar, Decl(controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts, 0, 39))
>T : Symbol(T, Decl(controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts, 0, 22))

let test1;
>test1 : Symbol(test1, Decl(controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts, 1, 5))

test1 = bar;
>test1 : Symbol(test1, Decl(controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts, 1, 5))
>bar : Symbol(bar, Decl(controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts, 0, 39))

return test1;
>test1 : Symbol(test1, Decl(controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts, 1, 5))

};

const foo_autoArrayType = <T extends 1 | 2>(bar: T) => {
>foo_autoArrayType : Symbol(foo_autoArrayType, Decl(controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts, 6, 5))
>T : Symbol(T, Decl(controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts, 6, 27))
>bar : Symbol(bar, Decl(controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts, 6, 44))
>T : Symbol(T, Decl(controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts, 6, 27))

let test1 = [];
>test1 : Symbol(test1, Decl(controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts, 7, 5))

test1.push(bar);
>test1.push : Symbol(Array.push, Decl(lib.es5.d.ts, --, --))
>test1 : Symbol(test1, Decl(controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts, 7, 5))
>push : Symbol(Array.push, Decl(lib.es5.d.ts, --, --))
>bar : Symbol(bar, Decl(controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts, 6, 44))

return test1;
>test1 : Symbol(test1, Decl(controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts, 7, 5))

};

59 changes: 59 additions & 0 deletions tests/baselines/reference/controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.types
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@@ -0,0 +1,59 @@
//// [tests/cases/compiler/controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts] ////

=== controlFlowGenericTypesNarrowableReferencesWithAutoTypes1.ts ===
const foo_autoType = <T extends 1 | 2>(bar: T) => {
>foo_autoType : <T extends 1 | 2>(bar: T) => T
> : ^ ^^^^^^^^^ ^^ ^^ ^^^^^^
><T extends 1 | 2>(bar: T) => { let test1; test1 = bar; return test1;} : <T extends 1 | 2>(bar: T) => T
> : ^ ^^^^^^^^^ ^^ ^^ ^^^^^^
>bar : T
> : ^

let test1;
>test1 : any

test1 = bar;
>test1 = bar : T
> : ^
>test1 : any
>bar : T
> : ^

return test1;
>test1 : T
> : ^

};

const foo_autoArrayType = <T extends 1 | 2>(bar: T) => {
>foo_autoArrayType : <T extends 1 | 2>(bar: T) => T[]
> : ^ ^^^^^^^^^ ^^ ^^ ^^^^^^^^
><T extends 1 | 2>(bar: T) => { let test1 = []; test1.push(bar); return test1;} : <T extends 1 | 2>(bar: T) => T[]
> : ^ ^^^^^^^^^ ^^ ^^ ^^^^^^^^
>bar : T
> : ^

let test1 = [];
>test1 : any[]
> : ^^^^^
>[] : never[]
> : ^^^^^^^

test1.push(bar);
>test1.push(bar) : number
> : ^^^^^^
>test1.push : (...items: any[]) => number
> : ^^^^ ^^^^^^^^^^^^
>test1 : any[]
> : ^^^^^
>push : (...items: any[]) => number
> : ^^^^ ^^^^^^^^^^^^
>bar : T
> : ^

return test1;
>test1 : T[]
> : ^^^

};

75 changes: 75 additions & 0 deletions .../baselines/reference/controlFlowGenericTypesNarrowableReferencesWithSatisfies1.errors.txt
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@@ -0,0 +1,75 @@
controlFlowGenericTypesNarrowableReferencesWithSatisfies1.ts(50,3): error TS2322: Type '{ readonly table: T; readonly id: "foo"; }' is not assignable to type 'RecordPointer<Table>'.
Type '{ readonly table: T; readonly id: "foo"; }' is not assignable to type '{ id: string; table: "space"; }'.
Types of property 'table' are incompatible.
Type 'T' is not assignable to type '"space"'.
Type 'Table' is not assignable to type '"space"'.
Type '"block"' is not assignable to type '"space"'.


==== controlFlowGenericTypesNarrowableReferencesWithSatisfies1.ts (1 errors) ====
// https://github.com/microsoft/TypeScript/issues/52394

const foo52394 = <T extends 1 | 2>(bar: T) => {
const a = bar satisfies any;
return a;
};

type MyType52394 = {
a: string;
b: "a" | "b" | "c" | "d" | "e";
};
const foo2_52394 = <T extends "a" | "b" | "c">(bar: T) =>
({
a: bar,
b: bar,
}) satisfies MyType52394;

type BoxState = "open" | "closed";

type Box = {
boxState: BoxState;
boxedObject: unknown;
};

function boxFactorySafe<BS extends BoxState>(
boxState: BS,
boxedObject: unknown,
) {
return {
boxState,
boxedObject,
} as const satisfies Box;
}

const safeBoxedObject = boxFactorySafe("open", "some value");

// https://github.com/microsoft/TypeScript/issues/60698

type Table = "block" | "collection" | "space";

type RecordPointer<T extends Table> = {
[T_ in T]: {
id: string;
table: T_;
};
}[T];

function g<T extends Table>(t: T): RecordPointer<Table> {
const x = { table: t, id: "foo" } as const satisfies RecordPointer<Table>;
return x; // error
~~~~~~
!!! error TS2322: Type '{ readonly table: T; readonly id: "foo"; }' is not assignable to type 'RecordPointer<Table>'.
!!! error TS2322: Type '{ readonly table: T; readonly id: "foo"; }' is not assignable to type '{ id: string; table: "space"; }'.
!!! error TS2322: Types of property 'table' are incompatible.
!!! error TS2322: Type 'T' is not assignable to type '"space"'.
!!! error TS2322: Type 'Table' is not assignable to type '"space"'.
!!! error TS2322: Type '"block"' is not assignable to type '"space"'.
}

export function bounceAndTakeIfA<AB extends "A" | "B">(value: AB) {
if (value === "A") {
const temp = value satisfies "A"
const takeA: "A" = value satisfies "A";
}
}

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