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
85
86
87
88
89
90
91
92
|
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithConstructSignaturesWithSpecializedSignatures.ts(70,15): error TS2430: Interface 'I2' incorrectly extends interface 'Base2'.
Types of property 'a' are incompatible.
Type 'new (x: string) => string' is not assignable to type '{ new (x: "a"): number; new (x: string): number; }'.
Type 'string' is not assignable to type 'number'.
==== tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithConstructSignaturesWithSpecializedSignatures.ts (1 errors) ====
// same as subtypingWithCallSignatures but with additional specialized signatures that should not affect the results
module CallSignature {
interface Base { // T
// M's
new (x: 'a'): void;
new (x: string, y: number): void;
}
// S's
interface I extends Base {
// N's
new (x: 'a'): number; // ok because base returns void
new (x: string, y: number): number; // ok because base returns void
new <T>(x: T): string; // ok because base returns void
}
interface Base2 { // T
// M's
new (x: 'a'): number;
new (x: string): number;
}
// S's
interface I2 extends Base2 {
// N's
new (x: 'a'): string;
new (x: string): string; // error because base returns non-void;
}
// S's
interface I3 extends Base2 {
// N's
new <T>(x: T): string; // ok, adds a new call signature
}
}
module MemberWithCallSignature {
interface Base { // T
// M's
a: {
new (x: 'a'): void;
new (x: string): void;
}
a2: {
new (x: 'a', y: number): void;
new (x: string, y: number): void;
}
a3: new <T>(x: T) => void;
}
// S's
interface I extends Base {
// N's
a: new (x: string) => number; // ok because base returns void
a2: new (x: string, y: number) => boolean; // ok because base returns void
a3: new <T>(x: T) => string; // ok because base returns void
}
interface Base2 { // T
// M's
a: {
new (x: 'a'): number;
new (x: string): number;
}
a2: new <T>(x: T) => T;
}
// S's
interface I2 extends Base2 {
~~
!!! error TS2430: Interface 'I2' incorrectly extends interface 'Base2'.
!!! error TS2430: Types of property 'a' are incompatible.
!!! error TS2430: Type 'new (x: string) => string' is not assignable to type '{ new (x: "a"): number; new (x: string): number; }'.
!!! error TS2430: Type 'string' is not assignable to type 'number'.
// N's
a: new (x: string) => string; // error because base returns non-void;
}
// S's
interface I3 extends Base2 {
// N's
a2: new <T>(x: T) => string; // error because base returns non-void;
}
}
|
