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Merge pull request #4112 from Microsoft/nonObjectTypeConstraints

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Support non-object type constraints
This commit is contained in:
Anders Hejlsberg 2015-08-05 11:44:14 -07:00
parent c8b4a2edfd 0a71f2f3b2
commit 5cdb0d6b00
27 changed files with 371 additions and 107 deletions
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182
src/compiler/checker.ts
View file

@ -4668,19 +4668,21 @@ namespace ts {
let result: Ternary;
// both types are the same - covers 'they are the same primitive type or both are Any' or the same type parameter cases
if (source === target) return Ternary.True;
if (relation !== identityRelation) {
if (isTypeAny(target)) return Ternary.True;
if (source === undefinedType) return Ternary.True;
if (source === nullType && target !== undefinedType) return Ternary.True;
if (source.flags & TypeFlags.Enum && target === numberType) return Ternary.True;
if (source.flags & TypeFlags.StringLiteral && target === stringType) return Ternary.True;
if (relation === assignableRelation) {
if (isTypeAny(source)) return Ternary.True;
if (source === numberType && target.flags & TypeFlags.Enum) return Ternary.True;
}
if (relation === identityRelation) {
return isIdenticalTo(source, target);
}
if (relation !== identityRelation && source.flags & TypeFlags.FreshObjectLiteral) {
if (isTypeAny(target)) return Ternary.True;
if (source === undefinedType) return Ternary.True;
if (source === nullType && target !== undefinedType) return Ternary.True;
if (source.flags & TypeFlags.Enum && target === numberType) return Ternary.True;
if (source.flags & TypeFlags.StringLiteral && target === stringType) return Ternary.True;
if (relation === assignableRelation) {
if (isTypeAny(source)) return Ternary.True;
if (source === numberType && target.flags & TypeFlags.Enum) return Ternary.True;
}
if (source.flags & TypeFlags.FreshObjectLiteral) {
if (hasExcessProperties(<FreshObjectLiteralType>source, target, reportErrors)) {
if (reportErrors) {
reportRelationError(headMessage, source, target);
@ -4696,78 +4698,66 @@ namespace ts {
let saveErrorInfo = errorInfo;
if (source.flags & TypeFlags.Reference && target.flags & TypeFlags.Reference && (<TypeReference>source).target === (<TypeReference>target).target) {
// We have type references to same target type, see if relationship holds for all type arguments
if (result = typesRelatedTo((<TypeReference>source).typeArguments, (<TypeReference>target).typeArguments, reportErrors)) {
// Note that the "each" checks must precede the "some" checks to produce the correct results
if (source.flags & TypeFlags.Union) {
if (result = eachTypeRelatedToType(<UnionType>source, target, reportErrors)) {
return result;
}
}
else if (source.flags & TypeFlags.TypeParameter && target.flags & TypeFlags.TypeParameter) {
if (result = typeParameterRelatedTo(<TypeParameter>source, <TypeParameter>target, reportErrors)) {
else if (target.flags & TypeFlags.Intersection) {
if (result = typeRelatedToEachType(source, <IntersectionType>target, reportErrors)) {
return result;
}
}
else if (relation !== identityRelation) {
// Note that the "each" checks must precede the "some" checks to produce the correct results
if (source.flags & TypeFlags.Union) {
if (result = eachTypeRelatedToType(<UnionType>source, target, reportErrors)) {
return result;
}
}
else if (target.flags & TypeFlags.Intersection) {
if (result = typeRelatedToEachType(source, <IntersectionType>target, reportErrors)) {
return result;
}
}
else {
// It is necessary to try "each" checks on both sides because there may be nested "some" checks
// on either side that need to be prioritized. For example, A | B = (A | B) & (C | D) or
// A & B = (A & B) | (C & D).
if (source.flags & TypeFlags.Intersection) {
// If target is a union type the following check will report errors so we suppress them here
if (result = someTypeRelatedToType(<IntersectionType>source, target, reportErrors && !(target.flags & TypeFlags.Union))) {
return result;
}
}
if (target.flags & TypeFlags.Union) {
if (result = typeRelatedToSomeType(source, <UnionType>target, reportErrors)) {
return result;
}
}
}
}
else {
if (source.flags & TypeFlags.Union && target.flags & TypeFlags.Union ||
source.flags & TypeFlags.Intersection && target.flags & TypeFlags.Intersection) {
if (result = eachTypeRelatedToSomeType(<UnionOrIntersectionType>source, <UnionOrIntersectionType>target)) {
if (result &= eachTypeRelatedToSomeType(<UnionOrIntersectionType>target, <UnionOrIntersectionType>source)) {
return result;
}
// It is necessary to try "some" checks on both sides because there may be nested "each" checks
// on either side that need to be prioritized. For example, A | B = (A | B) & (C | D) or
// A & B = (A & B) | (C & D).
if (source.flags & TypeFlags.Intersection) {
// If target is a union type the following check will report errors so we suppress them here
if (result = someTypeRelatedToType(<IntersectionType>source, target, reportErrors && !(target.flags & TypeFlags.Union))) {
return result;
}
}
if (target.flags & TypeFlags.Union) {
if (result = typeRelatedToSomeType(source, <UnionType>target, reportErrors)) {
return result;
}
}
}
// Even if relationship doesn't hold for unions, type parameters, or generic type references,
// it may hold in a structural comparison.
// Report structural errors only if we haven't reported any errors yet
let reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo;
// Identity relation does not use apparent type
let sourceOrApparentType = relation === identityRelation ? source : getApparentType(source);
// In a check of the form X = A & B, we will have previously checked if A relates to X or B relates
// to X. Failing both of those we want to check if the aggregation of A and B's members structurally
// relates to X. Thus, we include intersection types on the source side here.
if (sourceOrApparentType.flags & (TypeFlags.ObjectType | TypeFlags.Intersection) && target.flags & TypeFlags.ObjectType) {
if (result = objectTypeRelatedTo(sourceOrApparentType, <ObjectType>target, reportStructuralErrors)) {
if (source.flags & TypeFlags.TypeParameter) {
let constraint = getConstraintOfTypeParameter(<TypeParameter>source);
if (!constraint || constraint.flags & TypeFlags.Any) {
constraint = emptyObjectType;
}
// Report constraint errors only if the constraint is not the empty object type
let reportConstraintErrors = reportErrors && constraint !== emptyObjectType;
if (result = isRelatedTo(constraint, target, reportConstraintErrors)) {
errorInfo = saveErrorInfo;
return result;
}
}
else if (source.flags & TypeFlags.TypeParameter && sourceOrApparentType.flags & TypeFlags.UnionOrIntersection) {
// We clear the errors first because the following check often gives a better error than
// the union or intersection comparison above if it is applicable.
errorInfo = saveErrorInfo;
if (result = isRelatedTo(sourceOrApparentType, target, reportErrors)) {
return result;
else {
if (source.flags & TypeFlags.Reference && target.flags & TypeFlags.Reference && (<TypeReference>source).target === (<TypeReference>target).target) {
// We have type references to same target type, see if relationship holds for all type arguments
if (result = typesRelatedTo((<TypeReference>source).typeArguments, (<TypeReference>target).typeArguments, reportErrors)) {
return result;
}
}
// Even if relationship doesn't hold for unions, intersections, or generic type references,
// it may hold in a structural comparison.
let apparentType = getApparentType(source);
// In a check of the form X = A & B, we will have previously checked if A relates to X or B relates
// to X. Failing both of those we want to check if the aggregation of A and B's members structurally
// relates to X. Thus, we include intersection types on the source side here.
if (apparentType.flags & (TypeFlags.ObjectType | TypeFlags.Intersection) && target.flags & TypeFlags.ObjectType) {
// Report structural errors only if we haven't reported any errors yet
let reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo;
if (result = objectTypeRelatedTo(apparentType, <ObjectType>target, reportStructuralErrors)) {
errorInfo = saveErrorInfo;
return result;
}
}
}
@ -4777,6 +4767,31 @@ namespace ts {
return Ternary.False;
}
function isIdenticalTo(source: Type, target: Type): Ternary {
let result: Ternary;
if (source.flags & TypeFlags.ObjectType && target.flags & TypeFlags.ObjectType) {
if (source.flags & TypeFlags.Reference && target.flags & TypeFlags.Reference && (<TypeReference>source).target === (<TypeReference>target).target) {
// We have type references to same target type, see if all type arguments are identical
if (result = typesRelatedTo((<TypeReference>source).typeArguments, (<TypeReference>target).typeArguments, /*reportErrors*/ false)) {
return result;
}
}
return objectTypeRelatedTo(<ObjectType>source, <ObjectType>target, /*reportErrors*/ false);
}
if (source.flags & TypeFlags.TypeParameter && target.flags & TypeFlags.TypeParameter) {
return typeParameterIdenticalTo(<TypeParameter>source, <TypeParameter>target);
}
if (source.flags & TypeFlags.Union && target.flags & TypeFlags.Union ||
source.flags & TypeFlags.Intersection && target.flags & TypeFlags.Intersection) {
if (result = eachTypeRelatedToSomeType(<UnionOrIntersectionType>source, <UnionOrIntersectionType>target)) {
if (result &= eachTypeRelatedToSomeType(<UnionOrIntersectionType>target, <UnionOrIntersectionType>source)) {
return result;
}
}
}
return Ternary.False;
}
function hasExcessProperties(source: FreshObjectLiteralType, target: Type, reportErrors: boolean): boolean {
for (let prop of getPropertiesOfObjectType(source)) {
if (!isKnownProperty(target, prop.name)) {
@ -4861,29 +4876,18 @@ namespace ts {
return result;
}
function typeParameterRelatedTo(source: TypeParameter, target: TypeParameter, reportErrors: boolean): Ternary {
if (relation === identityRelation) {
if (source.symbol.name !== target.symbol.name) {
return Ternary.False;
}
// covers case when both type parameters does not have constraint (both equal to noConstraintType)
if (source.constraint === target.constraint) {
return Ternary.True;
}
if (source.constraint === noConstraintType || target.constraint === noConstraintType) {
return Ternary.False;
}
return isRelatedTo(source.constraint, target.constraint, reportErrors);
}
else {
while (true) {
let constraint = getConstraintOfTypeParameter(source);
if (constraint === target) return Ternary.True;
if (!(constraint && constraint.flags & TypeFlags.TypeParameter)) break;
source = <TypeParameter>constraint;
}
function typeParameterIdenticalTo(source: TypeParameter, target: TypeParameter): Ternary {
if (source.symbol.name !== target.symbol.name) {
return Ternary.False;
}
// covers case when both type parameters does not have constraint (both equal to noConstraintType)
if (source.constraint === target.constraint) {
return Ternary.True;
}
if (source.constraint === noConstraintType || target.constraint === noConstraintType) {
return Ternary.False;
}
return isIdenticalTo(source.constraint, target.constraint);
}
// Determine if two object types are related by structure. First, check if the result is already available in the global cache.

2
tests/baselines/reference/apparentTypeSupertype.errors.txt
View file

@ -1,6 +1,7 @@
tests/cases/conformance/types/typeRelationships/apparentType/apparentTypeSupertype.ts(9,7): error TS2415: Class 'Derived<U>' incorrectly extends base class 'Base'.
Types of property 'x' are incompatible.
Type 'U' is not assignable to type 'string'.
Type 'String' is not assignable to type 'string'.
==== tests/cases/conformance/types/typeRelationships/apparentType/apparentTypeSupertype.ts (1 errors) ====
@ -17,5 +18,6 @@ tests/cases/conformance/types/typeRelationships/apparentType/apparentTypeSuperty
!!! error TS2415: Class 'Derived<U>' incorrectly extends base class 'Base'.
!!! error TS2415: Types of property 'x' are incompatible.
!!! error TS2415: Type 'U' is not assignable to type 'string'.
!!! error TS2415: Type 'String' is not assignable to type 'string'.
x: U;
}

4
tests/baselines/reference/assignmentCompatWithNumericIndexer.errors.txt
View file

@ -12,12 +12,14 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithNumericIndexer.ts(33,9): error TS2322: Type 'A<T>' is not assignable to type '{ [x: number]: Derived; }'.
Index signatures are incompatible.
Type 'T' is not assignable to type 'Derived'.
Type 'Base' is not assignable to type 'Derived'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithNumericIndexer.ts(36,9): error TS2322: Type '{ [x: number]: Derived2; }' is not assignable to type 'A<T>'.
Index signatures are incompatible.
Type 'Derived2' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithNumericIndexer.ts(37,9): error TS2322: Type 'A<T>' is not assignable to type '{ [x: number]: Derived2; }'.
Index signatures are incompatible.
Type 'T' is not assignable to type 'Derived2'.
Type 'Base' is not assignable to type 'Derived2'.
==== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithNumericIndexer.ts (6 errors) ====
@ -72,6 +74,7 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
!!! error TS2322: Type 'A<T>' is not assignable to type '{ [x: number]: Derived; }'.
!!! error TS2322: Index signatures are incompatible.
!!! error TS2322: Type 'T' is not assignable to type 'Derived'.
!!! error TS2322: Type 'Base' is not assignable to type 'Derived'.
var b2: { [x: number]: Derived2; }
a = b2; // error
@ -84,6 +87,7 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
!!! error TS2322: Type 'A<T>' is not assignable to type '{ [x: number]: Derived2; }'.
!!! error TS2322: Index signatures are incompatible.
!!! error TS2322: Type 'T' is not assignable to type 'Derived2'.
!!! error TS2322: Type 'Base' is not assignable to type 'Derived2'.
var b3: { [x: number]: T; }
a = b3; // ok

4
tests/baselines/reference/assignmentCompatWithNumericIndexer2.errors.txt
View file

@ -12,12 +12,14 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithNumericIndexer2.ts(33,9): error TS2322: Type 'A<T>' is not assignable to type '{ [x: number]: Derived; }'.
Index signatures are incompatible.
Type 'T' is not assignable to type 'Derived'.
Type 'Base' is not assignable to type 'Derived'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithNumericIndexer2.ts(36,9): error TS2322: Type '{ [x: number]: Derived2; }' is not assignable to type 'A<T>'.
Index signatures are incompatible.
Type 'Derived2' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithNumericIndexer2.ts(37,9): error TS2322: Type 'A<T>' is not assignable to type '{ [x: number]: Derived2; }'.
Index signatures are incompatible.
Type 'T' is not assignable to type 'Derived2'.
Type 'Base' is not assignable to type 'Derived2'.
==== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithNumericIndexer2.ts (6 errors) ====
@ -72,6 +74,7 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
!!! error TS2322: Type 'A<T>' is not assignable to type '{ [x: number]: Derived; }'.
!!! error TS2322: Index signatures are incompatible.
!!! error TS2322: Type 'T' is not assignable to type 'Derived'.
!!! error TS2322: Type 'Base' is not assignable to type 'Derived'.
var b2: { [x: number]: Derived2; }
a = b2; // error
@ -84,6 +87,7 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
!!! error TS2322: Type 'A<T>' is not assignable to type '{ [x: number]: Derived2; }'.
!!! error TS2322: Index signatures are incompatible.
!!! error TS2322: Type 'T' is not assignable to type 'Derived2'.
!!! error TS2322: Type 'Base' is not assignable to type 'Derived2'.
var b3: { [x: number]: T; }
a = b3; // ok

4
tests/baselines/reference/assignmentCompatWithStringIndexer.errors.txt
View file

@ -18,12 +18,14 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithStringIndexer.ts(47,9): error TS2322: Type 'A<T>' is not assignable to type '{ [x: string]: Derived; }'.
Index signatures are incompatible.
Type 'T' is not assignable to type 'Derived'.
Type 'Base' is not assignable to type 'Derived'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithStringIndexer.ts(50,9): error TS2322: Type '{ [x: string]: Derived2; }' is not assignable to type 'A<T>'.
Index signatures are incompatible.
Type 'Derived2' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithStringIndexer.ts(51,9): error TS2322: Type 'A<T>' is not assignable to type '{ [x: string]: Derived2; }'.
Index signatures are incompatible.
Type 'T' is not assignable to type 'Derived2'.
Type 'Base' is not assignable to type 'Derived2'.
==== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithStringIndexer.ts (8 errors) ====
@ -100,6 +102,7 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
!!! error TS2322: Type 'A<T>' is not assignable to type '{ [x: string]: Derived; }'.
!!! error TS2322: Index signatures are incompatible.
!!! error TS2322: Type 'T' is not assignable to type 'Derived'.
!!! error TS2322: Type 'Base' is not assignable to type 'Derived'.
var b4: { [x: string]: Derived2; };
a3 = b4; // error
@ -112,5 +115,6 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
!!! error TS2322: Type 'A<T>' is not assignable to type '{ [x: string]: Derived2; }'.
!!! error TS2322: Index signatures are incompatible.
!!! error TS2322: Type 'T' is not assignable to type 'Derived2'.
!!! error TS2322: Type 'Base' is not assignable to type 'Derived2'.
}
}

4
tests/baselines/reference/assignmentCompatWithStringIndexer2.errors.txt
View file

@ -18,12 +18,14 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithStringIndexer2.ts(47,9): error TS2322: Type 'A<T>' is not assignable to type '{ [x: string]: Derived; }'.
Index signatures are incompatible.
Type 'T' is not assignable to type 'Derived'.
Type 'Base' is not assignable to type 'Derived'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithStringIndexer2.ts(50,9): error TS2322: Type '{ [x: string]: Derived2; }' is not assignable to type 'A<T>'.
Index signatures are incompatible.
Type 'Derived2' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithStringIndexer2.ts(51,9): error TS2322: Type 'A<T>' is not assignable to type '{ [x: string]: Derived2; }'.
Index signatures are incompatible.
Type 'T' is not assignable to type 'Derived2'.
Type 'Base' is not assignable to type 'Derived2'.
==== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithStringIndexer2.ts (8 errors) ====
@ -100,6 +102,7 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
!!! error TS2322: Type 'A<T>' is not assignable to type '{ [x: string]: Derived; }'.
!!! error TS2322: Index signatures are incompatible.
!!! error TS2322: Type 'T' is not assignable to type 'Derived'.
!!! error TS2322: Type 'Base' is not assignable to type 'Derived'.
var b4: { [x: string]: Derived2; };
a3 = b4; // error
@ -112,5 +115,6 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
!!! error TS2322: Type 'A<T>' is not assignable to type '{ [x: string]: Derived2; }'.
!!! error TS2322: Index signatures are incompatible.
!!! error TS2322: Type 'T' is not assignable to type 'Derived2'.
!!! error TS2322: Type 'Base' is not assignable to type 'Derived2'.
}
}

2
tests/baselines/reference/assignmentCompatWithStringIndexer3.errors.txt
View file

@ -5,6 +5,7 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithStringIndexer3.ts(21,9): error TS2322: Type 'A<T>' is not assignable to type '{ [x: string]: string; }'.
Index signatures are incompatible.
Type 'T' is not assignable to type 'string'.
Type 'Derived' is not assignable to type 'string'.
==== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithStringIndexer3.ts (3 errors) ====
@ -39,5 +40,6 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
!!! error TS2322: Type 'A<T>' is not assignable to type '{ [x: string]: string; }'.
!!! error TS2322: Index signatures are incompatible.
!!! error TS2322: Type 'T' is not assignable to type 'string'.
!!! error TS2322: Type 'Derived' is not assignable to type 'string'.
}
}

42
tests/baselines/reference/assignmentNonObjectTypeConstraints.js Normal file
View file

@ -0,0 +1,42 @@
//// [assignmentNonObjectTypeConstraints.ts]
const enum E { A, B, C }
function foo<T extends number>(x: T) {
var y: number = x; // Ok
}
foo(5);
foo(E.A);
class A { a }
class B { b }
function bar<T extends A | B>(x: T) {
var y: A | B = x; // Ok
}
bar(new A);
bar(new B);
//// [assignmentNonObjectTypeConstraints.js]
function foo(x) {
var y = x; // Ok
}
foo(5);
foo(0 /* A */);
var A = (function () {
function A() {
}
return A;
})();
var B = (function () {
function B() {
}
return B;
})();
function bar(x) {
var y = x; // Ok
}
bar(new A);
bar(new B);

58
tests/baselines/reference/assignmentNonObjectTypeConstraints.symbols Normal file
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@ -0,0 +1,58 @@
=== tests/cases/compiler/assignmentNonObjectTypeConstraints.ts ===
const enum E { A, B, C }
>E : Symbol(E, Decl(assignmentNonObjectTypeConstraints.ts, 0, 0))
>A : Symbol(E.A, Decl(assignmentNonObjectTypeConstraints.ts, 0, 14))
>B : Symbol(E.B, Decl(assignmentNonObjectTypeConstraints.ts, 0, 17))
>C : Symbol(E.C, Decl(assignmentNonObjectTypeConstraints.ts, 0, 20))
function foo<T extends number>(x: T) {
>foo : Symbol(foo, Decl(assignmentNonObjectTypeConstraints.ts, 0, 24))
>T : Symbol(T, Decl(assignmentNonObjectTypeConstraints.ts, 2, 13))
>x : Symbol(x, Decl(assignmentNonObjectTypeConstraints.ts, 2, 31))
>T : Symbol(T, Decl(assignmentNonObjectTypeConstraints.ts, 2, 13))
var y: number = x; // Ok
>y : Symbol(y, Decl(assignmentNonObjectTypeConstraints.ts, 3, 7))
>x : Symbol(x, Decl(assignmentNonObjectTypeConstraints.ts, 2, 31))
}
foo(5);
>foo : Symbol(foo, Decl(assignmentNonObjectTypeConstraints.ts, 0, 24))
foo(E.A);
>foo : Symbol(foo, Decl(assignmentNonObjectTypeConstraints.ts, 0, 24))
>E.A : Symbol(E.A, Decl(assignmentNonObjectTypeConstraints.ts, 0, 14))
>E : Symbol(E, Decl(assignmentNonObjectTypeConstraints.ts, 0, 0))
>A : Symbol(E.A, Decl(assignmentNonObjectTypeConstraints.ts, 0, 14))
class A { a }
>A : Symbol(A, Decl(assignmentNonObjectTypeConstraints.ts, 7, 9))
>a : Symbol(a, Decl(assignmentNonObjectTypeConstraints.ts, 9, 9))
class B { b }
>B : Symbol(B, Decl(assignmentNonObjectTypeConstraints.ts, 9, 13))
>b : Symbol(b, Decl(assignmentNonObjectTypeConstraints.ts, 10, 9))
function bar<T extends A | B>(x: T) {
>bar : Symbol(bar, Decl(assignmentNonObjectTypeConstraints.ts, 10, 13))
>T : Symbol(T, Decl(assignmentNonObjectTypeConstraints.ts, 12, 13))
>A : Symbol(A, Decl(assignmentNonObjectTypeConstraints.ts, 7, 9))
>B : Symbol(B, Decl(assignmentNonObjectTypeConstraints.ts, 9, 13))
>x : Symbol(x, Decl(assignmentNonObjectTypeConstraints.ts, 12, 30))
>T : Symbol(T, Decl(assignmentNonObjectTypeConstraints.ts, 12, 13))
var y: A | B = x; // Ok
>y : Symbol(y, Decl(assignmentNonObjectTypeConstraints.ts, 13, 7))
>A : Symbol(A, Decl(assignmentNonObjectTypeConstraints.ts, 7, 9))
>B : Symbol(B, Decl(assignmentNonObjectTypeConstraints.ts, 9, 13))
>x : Symbol(x, Decl(assignmentNonObjectTypeConstraints.ts, 12, 30))
}
bar(new A);
>bar : Symbol(bar, Decl(assignmentNonObjectTypeConstraints.ts, 10, 13))
>A : Symbol(A, Decl(assignmentNonObjectTypeConstraints.ts, 7, 9))
bar(new B);
>bar : Symbol(bar, Decl(assignmentNonObjectTypeConstraints.ts, 10, 13))
>B : Symbol(B, Decl(assignmentNonObjectTypeConstraints.ts, 9, 13))

65
tests/baselines/reference/assignmentNonObjectTypeConstraints.types Normal file
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@ -0,0 +1,65 @@
=== tests/cases/compiler/assignmentNonObjectTypeConstraints.ts ===
const enum E { A, B, C }
>E : E
>A : E
>B : E
>C : E
function foo<T extends number>(x: T) {
>foo : <T extends number>(x: T) => void
>T : T
>x : T
>T : T
var y: number = x; // Ok
>y : number
>x : T
}
foo(5);
>foo(5) : void
>foo : <T extends number>(x: T) => void
>5 : number
foo(E.A);
>foo(E.A) : void
>foo : <T extends number>(x: T) => void
>E.A : E
>E : typeof E
>A : E
class A { a }
>A : A
>a : any
class B { b }
>B : B
>b : any
function bar<T extends A | B>(x: T) {
>bar : <T extends A | B>(x: T) => void
>T : T
>A : A
>B : B
>x : T
>T : T
var y: A | B = x; // Ok
>y : A | B
>A : A
>B : B
>x : T
}
bar(new A);
>bar(new A) : void
>bar : <T extends A | B>(x: T) => void
>new A : A
>A : typeof A
bar(new B);
>bar(new B) : void
>bar : <T extends A | B>(x: T) => void
>new B : B
>B : typeof B

4
tests/baselines/reference/functionConstraintSatisfaction2.errors.txt
View file

@ -14,7 +14,7 @@ tests/cases/conformance/types/typeParameters/typeArgumentLists/functionConstrain
tests/cases/conformance/types/typeParameters/typeArgumentLists/functionConstraintSatisfaction2.ts(34,16): error TS2345: Argument of type 'F2' is not assignable to parameter of type '(x: string) => string'.
tests/cases/conformance/types/typeParameters/typeArgumentLists/functionConstraintSatisfaction2.ts(36,38): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeParameters/typeArgumentLists/functionConstraintSatisfaction2.ts(37,10): error TS2345: Argument of type 'T' is not assignable to parameter of type '(x: string) => string'.
Type 'void' is not assignable to type 'string'.
Type '() => void' is not assignable to type '(x: string) => string'.
tests/cases/conformance/types/typeParameters/typeArgumentLists/functionConstraintSatisfaction2.ts(38,10): error TS2345: Argument of type 'U' is not assignable to parameter of type '(x: string) => string'.
@ -85,7 +85,7 @@ tests/cases/conformance/types/typeParameters/typeArgumentLists/functionConstrain
foo2(x);
~
!!! error TS2345: Argument of type 'T' is not assignable to parameter of type '(x: string) => string'.
!!! error TS2345: Type 'void' is not assignable to type 'string'.
!!! error TS2345: Type '() => void' is not assignable to type '(x: string) => string'.
foo2(y);
~
!!! error TS2345: Argument of type 'U' is not assignable to parameter of type '(x: string) => string'.

8
tests/baselines/reference/genericCallWithGenericSignatureArguments2.errors.txt
View file

@ -5,7 +5,8 @@ tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGen
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(25,23): error TS2345: Argument of type '(a: T) => T' is not assignable to parameter of type '(x: Date) => Date'.
Types of parameters 'a' and 'x' are incompatible.
Type 'T' is not assignable to type 'Date'.
Property 'toDateString' is missing in type 'RegExp'.
Type 'RegExp' is not assignable to type 'Date'.
Property 'toDateString' is missing in type 'RegExp'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(37,36): error TS2345: Argument of type '(x: E) => F' is not assignable to parameter of type '(x: E) => E'.
Type 'F' is not assignable to type 'E'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(50,21): error TS2345: Argument of type 'Date' is not assignable to parameter of type 'T'.
@ -13,6 +14,7 @@ tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGen
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(60,23): error TS2345: Argument of type '(a: T) => T' is not assignable to parameter of type '(x: Date) => Date'.
Types of parameters 'a' and 'x' are incompatible.
Type 'T' is not assignable to type 'Date'.
Type 'RegExp' is not assignable to type 'Date'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(67,51): error TS2304: Cannot find name 'U'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGenericSignatureArguments2.ts(67,57): error TS2304: Cannot find name 'U'.
@ -54,7 +56,8 @@ tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGen
!!! error TS2345: Argument of type '(a: T) => T' is not assignable to parameter of type '(x: Date) => Date'.
!!! error TS2345: Types of parameters 'a' and 'x' are incompatible.
!!! error TS2345: Type 'T' is not assignable to type 'Date'.
!!! error TS2345: Property 'toDateString' is missing in type 'RegExp'.
!!! error TS2345: Type 'RegExp' is not assignable to type 'Date'.
!!! error TS2345: Property 'toDateString' is missing in type 'RegExp'.
var r7b = foo2((a) => a, (b) => b); // valid, T is inferred to be Date
}
@ -101,6 +104,7 @@ tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithGen
!!! error TS2345: Argument of type '(a: T) => T' is not assignable to parameter of type '(x: Date) => Date'.
!!! error TS2345: Types of parameters 'a' and 'x' are incompatible.
!!! error TS2345: Type 'T' is not assignable to type 'Date'.
!!! error TS2345: Type 'RegExp' is not assignable to type 'Date'.
var r7b = foo2((a) => a, (b) => b);
}

5
tests/baselines/reference/genericCallWithObjectTypeArgsAndIndexersErrors.errors.txt
View file

@ -1,9 +1,8 @@
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithObjectTypeArgsAndIndexersErrors.ts(15,17): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithObjectTypeArgsAndIndexersErrors.ts(18,9): error TS2413: Numeric index type 'T' is not assignable to string index type 'Object'.
tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithObjectTypeArgsAndIndexersErrors.ts(23,9): error TS2322: Type 'T' is not assignable to type 'U'.
==== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithObjectTypeArgsAndIndexersErrors.ts (3 errors) ====
==== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithObjectTypeArgsAndIndexersErrors.ts (2 errors) ====
// Type inference infers from indexers in target type, error cases
function foo<T>(x: T) {
@ -24,8 +23,6 @@ tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithObj
var b: {
[x: string]: Object;
[x: number]: T;
~~~~~~~~~~~~~~~
!!! error TS2413: Numeric index type 'T' is not assignable to string index type 'Object'.
};
var r2 = foo(b);
var d = r2[1];

2
tests/baselines/reference/genericTypeAssertions6.errors.txt
View file

@ -1,6 +1,7 @@
tests/cases/compiler/genericTypeAssertions6.ts(8,13): error TS2352: Neither type 'U' nor type 'T' is assignable to the other.
tests/cases/compiler/genericTypeAssertions6.ts(9,13): error TS2352: Neither type 'T' nor type 'U' is assignable to the other.
tests/cases/compiler/genericTypeAssertions6.ts(19,17): error TS2352: Neither type 'U' nor type 'T' is assignable to the other.
Type 'Date' is not assignable to type 'T'.
==== tests/cases/compiler/genericTypeAssertions6.ts (3 errors) ====
@ -29,6 +30,7 @@ tests/cases/compiler/genericTypeAssertions6.ts(19,17): error TS2352: Neither typ
var e = <T><U>new Date();
~~~~~~~~~~~~~~~~
!!! error TS2352: Neither type 'U' nor type 'T' is assignable to the other.
!!! error TS2352: Type 'Date' is not assignable to type 'T'.
}
}

10
tests/baselines/reference/genericTypeWithNonGenericBaseMisMatch.errors.txt
View file

@ -3,8 +3,9 @@ tests/cases/compiler/genericTypeWithNonGenericBaseMisMatch.ts(4,7): error TS2420
Type '(a: T) => void' is not assignable to type '(a: { a: number; }) => void'.
Types of parameters 'a' and 'a' are incompatible.
Type 'T' is not assignable to type '{ a: number; }'.
Types of property 'a' are incompatible.
Type 'string' is not assignable to type 'number'.
Type '{ a: string; }' is not assignable to type '{ a: number; }'.
Types of property 'a' are incompatible.
Type 'string' is not assignable to type 'number'.
tests/cases/compiler/genericTypeWithNonGenericBaseMisMatch.ts(8,5): error TS2322: Type 'X<{ a: string; }>' is not assignable to type 'I'.
Types of property 'f' are incompatible.
Type '(a: { a: string; }) => void' is not assignable to type '(a: { a: number; }) => void'.
@ -25,8 +26,9 @@ tests/cases/compiler/genericTypeWithNonGenericBaseMisMatch.ts(8,5): error TS2322
!!! error TS2420: Type '(a: T) => void' is not assignable to type '(a: { a: number; }) => void'.
!!! error TS2420: Types of parameters 'a' and 'a' are incompatible.
!!! error TS2420: Type 'T' is not assignable to type '{ a: number; }'.
!!! error TS2420: Types of property 'a' are incompatible.
!!! error TS2420: Type 'string' is not assignable to type 'number'.
!!! error TS2420: Type '{ a: string; }' is not assignable to type '{ a: number; }'.
!!! error TS2420: Types of property 'a' are incompatible.
!!! error TS2420: Type 'string' is not assignable to type 'number'.
f(a: T): void { }
}
var x = new X<{ a: string }>();

4
tests/baselines/reference/interfaceWithMultipleBaseTypes.errors.txt
View file

@ -18,11 +18,9 @@ tests/cases/conformance/interfaces/interfaceDeclarations/interfaceWithMultipleBa
tests/cases/conformance/interfaces/interfaceDeclarations/interfaceWithMultipleBaseTypes.ts(60,15): error TS2430: Interface 'Derived5<T>' incorrectly extends interface 'Base1<T>'.
Types of property 'x' are incompatible.
Type 'T' is not assignable to type '{ a: T; }'.
Property 'a' is missing in type '{}'.
tests/cases/conformance/interfaces/interfaceDeclarations/interfaceWithMultipleBaseTypes.ts(60,15): error TS2430: Interface 'Derived5<T>' incorrectly extends interface 'Base2<T>'.
Types of property 'x' are incompatible.
Type 'T' is not assignable to type '{ b: T; }'.
Property 'b' is missing in type '{}'.
==== tests/cases/conformance/interfaces/interfaceDeclarations/interfaceWithMultipleBaseTypes.ts (6 errors) ====
@ -111,12 +109,10 @@ tests/cases/conformance/interfaces/interfaceDeclarations/interfaceWithMultipleBa
!!! error TS2430: Interface 'Derived5<T>' incorrectly extends interface 'Base1<T>'.
!!! error TS2430: Types of property 'x' are incompatible.
!!! error TS2430: Type 'T' is not assignable to type '{ a: T; }'.
!!! error TS2430: Property 'a' is missing in type '{}'.
~~~~~~~~
!!! error TS2430: Interface 'Derived5<T>' incorrectly extends interface 'Base2<T>'.
!!! error TS2430: Types of property 'x' are incompatible.
!!! error TS2430: Type 'T' is not assignable to type '{ b: T; }'.
!!! error TS2430: Property 'b' is missing in type '{}'.
x: T;
}
}

6
tests/baselines/reference/objectTypeWithRecursiveWrappedPropertyCheckedNominally.errors.txt
View file

@ -5,9 +5,12 @@ tests/cases/conformance/types/typeRelationships/recursiveTypes/objectTypeWithRec
Types of property 'data' are incompatible.
Type 'number' is not assignable to type 'string'.
tests/cases/conformance/types/typeRelationships/recursiveTypes/objectTypeWithRecursiveWrappedPropertyCheckedNominally.ts(30,5): error TS2322: Type 'U' is not assignable to type 'T'.
Type 'MyList<number>' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/recursiveTypes/objectTypeWithRecursiveWrappedPropertyCheckedNominally.ts(31,5): error TS2322: Type 'T' is not assignable to type 'U'.
Type 'List<number>' is not assignable to type 'U'.
tests/cases/conformance/types/typeRelationships/recursiveTypes/objectTypeWithRecursiveWrappedPropertyCheckedNominally.ts(41,15): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/recursiveTypes/objectTypeWithRecursiveWrappedPropertyCheckedNominally.ts(42,5): error TS2322: Type 'U' is not assignable to type 'T'.
Type 'MyList<number>' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/recursiveTypes/objectTypeWithRecursiveWrappedPropertyCheckedNominally.ts(43,5): error TS2322: Type 'T' is not assignable to type 'U'.
tests/cases/conformance/types/typeRelationships/recursiveTypes/objectTypeWithRecursiveWrappedPropertyCheckedNominally.ts(48,5): error TS2322: Type 'T' is not assignable to type 'List<number>'.
tests/cases/conformance/types/typeRelationships/recursiveTypes/objectTypeWithRecursiveWrappedPropertyCheckedNominally.ts(50,5): error TS2322: Type 'T' is not assignable to type 'MyList<number>'.
@ -54,9 +57,11 @@ tests/cases/conformance/types/typeRelationships/recursiveTypes/objectTypeWithRec
t = u; // error
~
!!! error TS2322: Type 'U' is not assignable to type 'T'.
!!! error TS2322: Type 'MyList<number>' is not assignable to type 'T'.
u = t; // error
~
!!! error TS2322: Type 'T' is not assignable to type 'U'.
!!! error TS2322: Type 'List<number>' is not assignable to type 'U'.
var a: List<number>;
var b: MyList<number>;
@ -72,6 +77,7 @@ tests/cases/conformance/types/typeRelationships/recursiveTypes/objectTypeWithRec
t = u; // error
~
!!! error TS2322: Type 'U' is not assignable to type 'T'.
!!! error TS2322: Type 'MyList<number>' is not assignable to type 'T'.
u = t; // was error, ok after constraint made illegal, doesn't matter
~
!!! error TS2322: Type 'T' is not assignable to type 'U'.

4
tests/baselines/reference/subtypesOfTypeParameterWithConstraints.errors.txt
View file

@ -101,12 +101,14 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints.ts(132,7): error TS2415: Class 'D23<T, U, V>' incorrectly extends base class 'C3<T>'.
Types of property 'foo' are incompatible.
Type 'V' is not assignable to type 'T'.
Type 'Date' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints.ts(132,11): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints.ts(132,24): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints.ts(134,5): error TS2411: Property 'foo' of type 'V' is not assignable to string index type 'T'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints.ts(137,7): error TS2415: Class 'D24<T, U, V>' incorrectly extends base class 'C3<U>'.
Types of property 'foo' are incompatible.
Type 'V' is not assignable to type 'U'.
Type 'Date' is not assignable to type 'U'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints.ts(137,11): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints.ts(137,24): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints.ts(139,5): error TS2411: Property 'foo' of type 'V' is not assignable to string index type 'U'.
@ -441,6 +443,7 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
!!! error TS2415: Class 'D23<T, U, V>' incorrectly extends base class 'C3<T>'.
!!! error TS2415: Types of property 'foo' are incompatible.
!!! error TS2415: Type 'V' is not assignable to type 'T'.
!!! error TS2415: Type 'Date' is not assignable to type 'T'.
~~~~~~~~~~~
!!! error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
~~~~~~~~~~~
@ -456,6 +459,7 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
!!! error TS2415: Class 'D24<T, U, V>' incorrectly extends base class 'C3<U>'.
!!! error TS2415: Types of property 'foo' are incompatible.
!!! error TS2415: Type 'V' is not assignable to type 'U'.
!!! error TS2415: Type 'Date' is not assignable to type 'U'.
~~~~~~~~~~~
!!! error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
~~~~~~~~~~~

6
tests/baselines/reference/subtypesOfTypeParameterWithConstraints4.errors.txt
View file

@ -1,11 +1,11 @@
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints4.ts(45,7): error TS2415: Class 'D3<T, U, V>' incorrectly extends base class 'B1<Foo>'.
Types of property 'foo' are incompatible.
Type 'V' is not assignable to type 'Foo'.
Property 'foo' is missing in type '{}'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints4.ts(47,5): error TS2411: Property 'foo' of type 'V' is not assignable to string index type 'Foo'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints4.ts(55,7): error TS2415: Class 'D5<T, U, V>' incorrectly extends base class 'B1<T>'.
Types of property 'foo' are incompatible.
Type 'U' is not assignable to type 'T'.
Type 'Foo' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints4.ts(57,5): error TS2411: Property 'foo' of type 'U' is not assignable to string index type 'T'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints4.ts(60,7): error TS2415: Class 'D6<T, U, V>' incorrectly extends base class 'B1<T>'.
Types of property 'foo' are incompatible.
@ -14,6 +14,7 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints4.ts(65,7): error TS2415: Class 'D7<T, U, V>' incorrectly extends base class 'B1<U>'.
Types of property 'foo' are incompatible.
Type 'T' is not assignable to type 'U'.
Type 'Foo' is not assignable to type 'U'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints4.ts(67,5): error TS2411: Property 'foo' of type 'T' is not assignable to string index type 'U'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints4.ts(75,7): error TS2415: Class 'D9<T, U, V>' incorrectly extends base class 'B1<U>'.
Types of property 'foo' are incompatible.
@ -71,7 +72,6 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
!!! error TS2415: Class 'D3<T, U, V>' incorrectly extends base class 'B1<Foo>'.
!!! error TS2415: Types of property 'foo' are incompatible.
!!! error TS2415: Type 'V' is not assignable to type 'Foo'.
!!! error TS2415: Property 'foo' is missing in type '{}'.
[x: string]: Foo;
foo: V; // error
~~~~~~~
@ -88,6 +88,7 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
!!! error TS2415: Class 'D5<T, U, V>' incorrectly extends base class 'B1<T>'.
!!! error TS2415: Types of property 'foo' are incompatible.
!!! error TS2415: Type 'U' is not assignable to type 'T'.
!!! error TS2415: Type 'Foo' is not assignable to type 'T'.
[x: string]: T;
foo: U; // error
~~~~~~~
@ -110,6 +111,7 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
!!! error TS2415: Class 'D7<T, U, V>' incorrectly extends base class 'B1<U>'.
!!! error TS2415: Types of property 'foo' are incompatible.
!!! error TS2415: Type 'T' is not assignable to type 'U'.
!!! error TS2415: Type 'Foo' is not assignable to type 'U'.
[x: string]: U;
foo: T; // error
~~~~~~~

12
tests/baselines/reference/subtypesOfTypeParameterWithRecursiveConstraints.errors.txt
View file

@ -7,6 +7,7 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(66,11): error TS2415: Class 'D2<T, U, V>' incorrectly extends base class 'Base<T>'.
Types of property 'foo' are incompatible.
Type 'U' is not assignable to type 'T'.
Type 'Foo<any>' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(66,14): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(66,32): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(66,50): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
@ -14,6 +15,7 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(71,11): error TS2415: Class 'D3<T, U, V>' incorrectly extends base class 'Base<T>'.
Types of property 'foo' are incompatible.
Type 'V' is not assignable to type 'T'.
Type 'Foo<any>' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(71,14): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(71,32): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(71,50): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
@ -21,6 +23,7 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(76,11): error TS2415: Class 'D4<T, U, V>' incorrectly extends base class 'Base<U>'.
Types of property 'foo' are incompatible.
Type 'T' is not assignable to type 'U'.
Type 'Foo<any>' is not assignable to type 'U'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(76,14): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(76,32): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(76,50): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
@ -31,6 +34,7 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(86,11): error TS2415: Class 'D6<T, U, V>' incorrectly extends base class 'Base<U>'.
Types of property 'foo' are incompatible.
Type 'V' is not assignable to type 'U'.
Type 'Foo<any>' is not assignable to type 'U'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(86,14): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(86,32): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(86,50): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
@ -38,6 +42,7 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(91,11): error TS2415: Class 'D7<T, U, V>' incorrectly extends base class 'Base<V>'.
Types of property 'foo' are incompatible.
Type 'T' is not assignable to type 'V'.
Type 'Foo<any>' is not assignable to type 'V'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(91,14): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(91,32): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(91,50): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
@ -45,6 +50,7 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(96,11): error TS2415: Class 'D8<T, U, V>' incorrectly extends base class 'Base<V>'.
Types of property 'foo' are incompatible.
Type 'U' is not assignable to type 'V'.
Type 'Foo<any>' is not assignable to type 'V'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(96,14): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(96,32): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithRecursiveConstraints.ts(96,50): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
@ -170,6 +176,7 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
!!! error TS2415: Class 'D2<T, U, V>' incorrectly extends base class 'Base<T>'.
!!! error TS2415: Types of property 'foo' are incompatible.
!!! error TS2415: Type 'U' is not assignable to type 'T'.
!!! error TS2415: Type 'Foo<any>' is not assignable to type 'T'.
~~~~~~~~~~~~~~~~
!!! error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
~~~~~~~~~~~~~~~~
@ -187,6 +194,7 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
!!! error TS2415: Class 'D3<T, U, V>' incorrectly extends base class 'Base<T>'.
!!! error TS2415: Types of property 'foo' are incompatible.
!!! error TS2415: Type 'V' is not assignable to type 'T'.
!!! error TS2415: Type 'Foo<any>' is not assignable to type 'T'.
~~~~~~~~~~~~~~~~
!!! error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
~~~~~~~~~~~~~~~~
@ -204,6 +212,7 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
!!! error TS2415: Class 'D4<T, U, V>' incorrectly extends base class 'Base<U>'.
!!! error TS2415: Types of property 'foo' are incompatible.
!!! error TS2415: Type 'T' is not assignable to type 'U'.
!!! error TS2415: Type 'Foo<any>' is not assignable to type 'U'.
~~~~~~~~~~~~~~~~
!!! error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
~~~~~~~~~~~~~~~~
@ -232,6 +241,7 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
!!! error TS2415: Class 'D6<T, U, V>' incorrectly extends base class 'Base<U>'.
!!! error TS2415: Types of property 'foo' are incompatible.
!!! error TS2415: Type 'V' is not assignable to type 'U'.
!!! error TS2415: Type 'Foo<any>' is not assignable to type 'U'.
~~~~~~~~~~~~~~~~
!!! error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
~~~~~~~~~~~~~~~~
@ -249,6 +259,7 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
!!! error TS2415: Class 'D7<T, U, V>' incorrectly extends base class 'Base<V>'.
!!! error TS2415: Types of property 'foo' are incompatible.
!!! error TS2415: Type 'T' is not assignable to type 'V'.
!!! error TS2415: Type 'Foo<any>' is not assignable to type 'V'.
~~~~~~~~~~~~~~~~
!!! error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
~~~~~~~~~~~~~~~~
@ -266,6 +277,7 @@ tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOf
!!! error TS2415: Class 'D8<T, U, V>' incorrectly extends base class 'Base<V>'.
!!! error TS2415: Types of property 'foo' are incompatible.
!!! error TS2415: Type 'U' is not assignable to type 'V'.
!!! error TS2415: Type 'Foo<any>' is not assignable to type 'V'.
~~~~~~~~~~~~~~~~
!!! error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
~~~~~~~~~~~~~~~~

8
tests/baselines/reference/typeParameterAssignability2.errors.txt
View file

@ -16,9 +16,11 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typePara
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability2.ts(24,28): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability2.ts(25,5): error TS2322: Type 'U' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability2.ts(26,5): error TS2322: Type 'V' is not assignable to type 'T'.
Type 'Date' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability2.ts(27,5): error TS2322: Type 'Date' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability2.ts(29,5): error TS2322: Type 'T' is not assignable to type 'U'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability2.ts(30,5): error TS2322: Type 'V' is not assignable to type 'U'.
Type 'Date' is not assignable to type 'U'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability2.ts(31,5): error TS2322: Type 'Date' is not assignable to type 'U'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability2.ts(33,5): error TS2322: Type 'T' is not assignable to type 'V'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability2.ts(34,5): error TS2322: Type 'U' is not assignable to type 'V'.
@ -29,9 +31,11 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typePara
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability2.ts(44,44): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability2.ts(45,5): error TS2322: Type 'U' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability2.ts(46,5): error TS2322: Type 'V' is not assignable to type 'T'.
Type 'Date' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability2.ts(47,5): error TS2322: Type 'Date' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability2.ts(49,5): error TS2322: Type 'T' is not assignable to type 'U'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability2.ts(50,5): error TS2322: Type 'V' is not assignable to type 'U'.
Type 'Date' is not assignable to type 'U'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability2.ts(51,5): error TS2322: Type 'Date' is not assignable to type 'U'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability2.ts(53,5): error TS2322: Type 'T' is not assignable to type 'V'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability2.ts(54,5): error TS2322: Type 'U' is not assignable to type 'V'.
@ -110,6 +114,7 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typePara
t = v; // error
~
!!! error TS2322: Type 'V' is not assignable to type 'T'.
!!! error TS2322: Type 'Date' is not assignable to type 'T'.
t = new Date(); // error
~
!!! error TS2322: Type 'Date' is not assignable to type 'T'.
@ -120,6 +125,7 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typePara
u = v; // error
~
!!! error TS2322: Type 'V' is not assignable to type 'U'.
!!! error TS2322: Type 'Date' is not assignable to type 'U'.
u = new Date(); // error
~
!!! error TS2322: Type 'Date' is not assignable to type 'U'.
@ -156,6 +162,7 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typePara
t = v; // error
~
!!! error TS2322: Type 'V' is not assignable to type 'T'.
!!! error TS2322: Type 'Date' is not assignable to type 'T'.
t = new Date(); // error
~
!!! error TS2322: Type 'Date' is not assignable to type 'T'.
@ -166,6 +173,7 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typePara
u = v; // error
~
!!! error TS2322: Type 'V' is not assignable to type 'U'.
!!! error TS2322: Type 'Date' is not assignable to type 'U'.
u = new Date(); // error
~
!!! error TS2322: Type 'Date' is not assignable to type 'U'.

8
tests/baselines/reference/typeParameterAssignability3.errors.txt
View file

@ -1,7 +1,11 @@
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability3.ts(14,5): error TS2322: Type 'U' is not assignable to type 'T'.
Type 'Foo' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability3.ts(15,5): error TS2322: Type 'T' is not assignable to type 'U'.
Type 'Foo' is not assignable to type 'U'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability3.ts(22,9): error TS2322: Type 'U' is not assignable to type 'T'.
Type 'Foo' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability3.ts(23,9): error TS2322: Type 'T' is not assignable to type 'U'.
Type 'Foo' is not assignable to type 'U'.
==== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability3.ts (4 errors) ====
@ -21,9 +25,11 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typePara
t = u; // error
~
!!! error TS2322: Type 'U' is not assignable to type 'T'.
!!! error TS2322: Type 'Foo' is not assignable to type 'T'.
u = t; // error
~
!!! error TS2322: Type 'T' is not assignable to type 'U'.
!!! error TS2322: Type 'Foo' is not assignable to type 'U'.
}
class C<T extends Foo, U extends Foo> {
@ -33,8 +39,10 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typePara
this.t = this.u; // error
~~~~~~
!!! error TS2322: Type 'U' is not assignable to type 'T'.
!!! error TS2322: Type 'Foo' is not assignable to type 'T'.
this.u = this.t; // error
~~~~~~
!!! error TS2322: Type 'T' is not assignable to type 'U'.
!!! error TS2322: Type 'Foo' is not assignable to type 'U'.
}
}

6
tests/baselines/reference/typeParameterDiamond3.errors.txt
View file

@ -4,6 +4,9 @@ tests/cases/compiler/typeParameterDiamond3.ts(9,13): error TS2322: Type 'Bottom'
Type 'Top | T | U' is not assignable to type 'T | U'.
Type 'Top' is not assignable to type 'T | U'.
Type 'Top' is not assignable to type 'U'.
Type 'Bottom' is not assignable to type 'U'.
Type 'Top | T | U' is not assignable to type 'U'.
Type 'Top' is not assignable to type 'U'.
tests/cases/compiler/typeParameterDiamond3.ts(10,13): error TS2322: Type 'Bottom' is not assignable to type 'Top'.
Type 'Top | T | U' is not assignable to type 'Top'.
Type 'T' is not assignable to type 'Top'.
@ -27,6 +30,9 @@ tests/cases/compiler/typeParameterDiamond3.ts(10,13): error TS2322: Type 'Bottom
!!! error TS2322: Type 'Top | T | U' is not assignable to type 'T | U'.
!!! error TS2322: Type 'Top' is not assignable to type 'T | U'.
!!! error TS2322: Type 'Top' is not assignable to type 'U'.
!!! error TS2322: Type 'Bottom' is not assignable to type 'U'.
!!! error TS2322: Type 'Top | T | U' is not assignable to type 'U'.
!!! error TS2322: Type 'Top' is not assignable to type 'U'.
top = bottom;
~~~
!!! error TS2322: Type 'Bottom' is not assignable to type 'Top'.

2
tests/baselines/reference/typeParameterUsedAsTypeParameterConstraint4.errors.txt
View file

@ -2,6 +2,7 @@ tests/cases/conformance/types/objectTypeLiteral/callSignatures/typeParameterUsed
tests/cases/conformance/types/objectTypeLiteral/callSignatures/typeParameterUsedAsTypeParameterConstraint4.ts(4,25): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/objectTypeLiteral/callSignatures/typeParameterUsedAsTypeParameterConstraint4.ts(5,8): error TS2304: Cannot find name 'W'.
tests/cases/conformance/types/objectTypeLiteral/callSignatures/typeParameterUsedAsTypeParameterConstraint4.ts(8,16): error TS2322: Type 'W' is not assignable to type 'T'.
Type 'V' is not assignable to type 'T'.
tests/cases/conformance/types/objectTypeLiteral/callSignatures/typeParameterUsedAsTypeParameterConstraint4.ts(12,16): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/objectTypeLiteral/callSignatures/typeParameterUsedAsTypeParameterConstraint4.ts(12,29): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
tests/cases/conformance/types/objectTypeLiteral/callSignatures/typeParameterUsedAsTypeParameterConstraint4.ts(15,8): error TS2304: Cannot find name 'W'.
@ -42,6 +43,7 @@ tests/cases/conformance/types/objectTypeLiteral/callSignatures/typeParameterUsed
return x;
~
!!! error TS2322: Type 'W' is not assignable to type 'T'.
!!! error TS2322: Type 'V' is not assignable to type 'T'.
}
}

6
tests/baselines/reference/typeParametersShouldNotBeEqual2.errors.txt
View file

@ -1,8 +1,11 @@
tests/cases/compiler/typeParametersShouldNotBeEqual2.ts(4,5): error TS2322: Type 'U' is not assignable to type 'T'.
Type 'Date' is not assignable to type 'T'.
tests/cases/compiler/typeParametersShouldNotBeEqual2.ts(5,5): error TS2322: Type 'V' is not assignable to type 'T'.
tests/cases/compiler/typeParametersShouldNotBeEqual2.ts(6,5): error TS2322: Type 'T' is not assignable to type 'V'.
Type 'Date' is not assignable to type 'V'.
tests/cases/compiler/typeParametersShouldNotBeEqual2.ts(7,5): error TS2322: Type 'V' is not assignable to type 'U'.
tests/cases/compiler/typeParametersShouldNotBeEqual2.ts(8,5): error TS2322: Type 'U' is not assignable to type 'V'.
Type 'Date' is not assignable to type 'V'.
tests/cases/compiler/typeParametersShouldNotBeEqual2.ts(9,5): error TS2322: Type 'Object' is not assignable to type 'T'.
@ -13,18 +16,21 @@ tests/cases/compiler/typeParametersShouldNotBeEqual2.ts(9,5): error TS2322: Type
x = y; // Ok
~
!!! error TS2322: Type 'U' is not assignable to type 'T'.
!!! error TS2322: Type 'Date' is not assignable to type 'T'.
x = z; // Error
~
!!! error TS2322: Type 'V' is not assignable to type 'T'.
z = x; // Error
~
!!! error TS2322: Type 'T' is not assignable to type 'V'.
!!! error TS2322: Type 'Date' is not assignable to type 'V'.
y = z; // Error
~
!!! error TS2322: Type 'V' is not assignable to type 'U'.
z = y; // Error
~
!!! error TS2322: Type 'U' is not assignable to type 'V'.
!!! error TS2322: Type 'Date' is not assignable to type 'V'.
x = zz; // Error
~
!!! error TS2322: Type 'Object' is not assignable to type 'T'.

2
tests/baselines/reference/typeParametersShouldNotBeEqual3.errors.txt
View file

@ -1,4 +1,5 @@
tests/cases/compiler/typeParametersShouldNotBeEqual3.ts(4,5): error TS2322: Type 'U' is not assignable to type 'T'.
Type 'Object' is not assignable to type 'T'.
tests/cases/compiler/typeParametersShouldNotBeEqual3.ts(5,5): error TS2322: Type 'Object' is not assignable to type 'T'.
@ -9,6 +10,7 @@ tests/cases/compiler/typeParametersShouldNotBeEqual3.ts(5,5): error TS2322: Type
x = y; // Ok
~
!!! error TS2322: Type 'U' is not assignable to type 'T'.
!!! error TS2322: Type 'Object' is not assignable to type 'T'.
x = z; // Ok
~
!!! error TS2322: Type 'Object' is not assignable to type 'T'.

18
tests/cases/compiler/assignmentNonObjectTypeConstraints.ts Normal file
View file

@ -0,0 +1,18 @@
const enum E { A, B, C }
function foo<T extends number>(x: T) {
var y: number = x; // Ok
}
foo(5);
foo(E.A);
class A { a }
class B { b }
function bar<T extends A | B>(x: T) {
var y: A | B = x; // Ok
}
bar(new A);
bar(new B);