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
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithObjectMembersOptionality2.ts(74,5): error TS2322: Type 'D' is not assignable to type 'C'.
Property 'opt' is missing in type 'D'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithObjectMembersOptionality2.ts(75,5): error TS2322: Type 'E' is not assignable to type 'C'.
Property 'opt' is missing in type 'E'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithObjectMembersOptionality2.ts(76,5): error TS2322: Type 'F' is not assignable to type 'C'.
Property 'opt' is missing in type 'F'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithObjectMembersOptionality2.ts(79,5): error TS2322: Type 'D' is not assignable to type '{ opt: Base; }'.
Property 'opt' is missing in type 'D'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithObjectMembersOptionality2.ts(80,5): error TS2322: Type 'E' is not assignable to type '{ opt: Base; }'.
Property 'opt' is missing in type 'E'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithObjectMembersOptionality2.ts(81,5): error TS2322: Type 'F' is not assignable to type '{ opt: Base; }'.
Property 'opt' is missing in type 'F'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithObjectMembersOptionality2.ts(84,5): error TS2322: Type 'D' is not assignable to type '{ opt: Base; }'.
Property 'opt' is missing in type 'D'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithObjectMembersOptionality2.ts(85,5): error TS2322: Type 'E' is not assignable to type '{ opt: Base; }'.
Property 'opt' is missing in type 'E'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithObjectMembersOptionality2.ts(86,5): error TS2322: Type 'F' is not assignable to type '{ opt: Base; }'.
Property 'opt' is missing in type 'F'.
==== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithObjectMembersOptionality2.ts (9 errors) ====
// M is optional and S contains no property with the same name as M
// N is optional and T contains no property with the same name as N
class Base { foo: string; }
class Derived extends Base { bar: string; }
class Derived2 extends Derived { baz: string; }
module TargetHasOptional {
// targets
interface C {
opt?: Base
}
var c: C;
var a: { opt?: Base; }
var b: typeof a = { opt: new Base() }
// sources
interface D {
other: Base;
}
interface E {
other: Derived;
}
interface F {
other?: Derived;
}
var d: D;
var e: E;
var f: F;
// all ok
c = d;
c = e;
c = f;
c = a;
a = d;
a = e;
a = f;
a = c;
b = d;
b = e;
b = f;
b = a;
b = c;
}
module SourceHasOptional {
// targets
interface C {
opt: Base
}
var c: C;
var a: { opt: Base; }
var b = { opt: new Base() }
// sources
interface D {
other?: Base;
}
interface E {
other?: Derived;
}
interface F {
other: Derived;
}
var d: D;
var e: E;
var f: F;
c = d; // error
~
!!! error TS2322: Type 'D' is not assignable to type 'C'.
!!! error TS2322: Property 'opt' is missing in type 'D'.
c = e; // error
~
!!! error TS2322: Type 'E' is not assignable to type 'C'.
!!! error TS2322: Property 'opt' is missing in type 'E'.
c = f; // error
~
!!! error TS2322: Type 'F' is not assignable to type 'C'.
!!! error TS2322: Property 'opt' is missing in type 'F'.
c = a; // ok
a = d; // error
~
!!! error TS2322: Type 'D' is not assignable to type '{ opt: Base; }'.
!!! error TS2322: Property 'opt' is missing in type 'D'.
a = e; // error
~
!!! error TS2322: Type 'E' is not assignable to type '{ opt: Base; }'.
!!! error TS2322: Property 'opt' is missing in type 'E'.
a = f; // error
~
!!! error TS2322: Type 'F' is not assignable to type '{ opt: Base; }'.
!!! error TS2322: Property 'opt' is missing in type 'F'.
a = c; // ok
b = d; // error
~
!!! error TS2322: Type 'D' is not assignable to type '{ opt: Base; }'.
!!! error TS2322: Property 'opt' is missing in type 'D'.
b = e; // error
~
!!! error TS2322: Type 'E' is not assignable to type '{ opt: Base; }'.
!!! error TS2322: Property 'opt' is missing in type 'E'.
b = f; // error
~
!!! error TS2322: Type 'F' is not assignable to type '{ opt: Base; }'.
!!! error TS2322: Property 'opt' is missing in type 'F'.
b = a; // ok
b = c; // ok
}
|
