1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithNumericIndexer2.ts(11,11): error TS2430: Interface 'B' incorrectly extends interface 'A'.
'number' index signatures are incompatible.
Property 'bar' is missing in type 'Base' but required in type 'Derived'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithNumericIndexer2.ts(24,27): error TS2344: Type 'Base' does not satisfy the constraint 'Derived'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithNumericIndexer2.ts(32,15): error TS2430: Interface 'B3<T>' incorrectly extends interface 'A<T>'.
'number' index signatures are incompatible.
Type 'Base' is not assignable to type 'T'.
'T' could be instantiated with an arbitrary type which could be unrelated to 'Base'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithNumericIndexer2.ts(36,15): error TS2430: Interface 'B4<T>' incorrectly extends interface 'A<T>'.
'number' index signatures are incompatible.
Type 'Derived' is not assignable to type 'T'.
'Derived' is assignable to the constraint of type 'T', but 'T' could be instantiated with a different subtype of constraint 'Derived'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithNumericIndexer2.ts(40,15): error TS2430: Interface 'B5<T>' incorrectly extends interface 'A<T>'.
'number' index signatures are incompatible.
Type 'Derived2' is not assignable to type 'T'.
'Derived2' is assignable to the constraint of type 'T', but 'T' could be instantiated with a different subtype of constraint 'Derived2'.
==== tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithNumericIndexer2.ts (5 errors) ====
// Derived type indexer must be subtype of base type indexer
interface Base { foo: string; }
interface Derived extends Base { bar: string; }
interface Derived2 extends Derived { baz: string; }
interface A {
[x: number]: Derived;
}
interface B extends A {
~
!!! error TS2430: Interface 'B' incorrectly extends interface 'A'.
!!! error TS2430: 'number' index signatures are incompatible.
!!! error TS2430: Property 'bar' is missing in type 'Base' but required in type 'Derived'.
!!! related TS2728 tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithNumericIndexer2.ts:4:34: 'bar' is declared here.
[x: number]: Base; // error
}
interface B2 extends A {
[x: number]: Derived2; // ok
}
module Generics {
interface A<T extends Derived> {
[x: number]: T;
}
interface B extends A<Base> {
~~~~
!!! error TS2344: Type 'Base' does not satisfy the constraint 'Derived'.
[x: number]: Derived; // error
}
interface B2 extends A<Derived> {
[x: number]: Derived2; // ok
}
interface B3<T extends Derived> extends A<T> {
~~
!!! error TS2430: Interface 'B3<T>' incorrectly extends interface 'A<T>'.
!!! error TS2430: 'number' index signatures are incompatible.
!!! error TS2430: Type 'Base' is not assignable to type 'T'.
!!! error TS2430: 'T' could be instantiated with an arbitrary type which could be unrelated to 'Base'.
[x: number]: Base; // error
}
interface B4<T extends Derived> extends A<T> {
~~
!!! error TS2430: Interface 'B4<T>' incorrectly extends interface 'A<T>'.
!!! error TS2430: 'number' index signatures are incompatible.
!!! error TS2430: Type 'Derived' is not assignable to type 'T'.
!!! error TS2430: 'Derived' is assignable to the constraint of type 'T', but 'T' could be instantiated with a different subtype of constraint 'Derived'.
[x: number]: Derived; // error
}
interface B5<T extends Derived2> extends A<T> {
~~
!!! error TS2430: Interface 'B5<T>' incorrectly extends interface 'A<T>'.
!!! error TS2430: 'number' index signatures are incompatible.
!!! error TS2430: Type 'Derived2' is not assignable to type 'T'.
!!! error TS2430: 'Derived2' is assignable to the constraint of type 'T', but 'T' could be instantiated with a different subtype of constraint 'Derived2'.
[x: number]: Derived2; // error
}
}
|
