File: genericCallWithFunctionTypedArguments5.types

package info (click to toggle)
node-typescript 3.3.3333-1
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 324,548 kB
  • sloc: makefile: 6; sh: 3
file content (106 lines) | stat: -rw-r--r-- 3,062 bytes parent folder | download
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
=== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithFunctionTypedArguments5.ts ===
// Generic call with parameter of object type with member of function type of n args passed object whose associated member is call signature with n+1 args

function foo<T, U>(arg: { cb: (t: T) => U }) {
>foo : <T, U>(arg: { cb: (t: T) => U; }) => U
>arg : { cb: (t: T) => U; }
>cb : (t: T) => U
>t : T

    return arg.cb(null);
>arg.cb(null) : U
>arg.cb : (t: T) => U
>arg : { cb: (t: T) => U; }
>cb : (t: T) => U
>null : null
}

var arg = { cb: <T>(x: T) => '' };
>arg : { cb: <T>(x: T) => string; }
>{ cb: <T>(x: T) => '' } : { cb: <T>(x: T) => string; }
>cb : <T>(x: T) => string
><T>(x: T) => '' : <T>(x: T) => string
>x : T
>'' : ""

var r = foo(arg); // {}
>r : string
>foo(arg) : string
>foo : <T, U>(arg: { cb: (t: T) => U; }) => U
>arg : { cb: <T>(x: T) => string; }

// more args not allowed
var r2 = foo({ cb: <T>(x: T, y: T) => '' }); // error
>r2 : any
>foo({ cb: <T>(x: T, y: T) => '' }) : any
>foo : <T, U>(arg: { cb: (t: T) => U; }) => U
>{ cb: <T>(x: T, y: T) => '' } : { cb: <T>(x: T, y: T) => string; }
>cb : <T>(x: T, y: T) => string
><T>(x: T, y: T) => '' : <T>(x: T, y: T) => string
>x : T
>y : T
>'' : ""

var r3 = foo({ cb: (x: string, y: number) => '' }); // error
>r3 : any
>foo({ cb: (x: string, y: number) => '' }) : any
>foo : <T, U>(arg: { cb: (t: T) => U; }) => U
>{ cb: (x: string, y: number) => '' } : { cb: (x: string, y: number) => string; }
>cb : (x: string, y: number) => string
>(x: string, y: number) => '' : (x: string, y: number) => string
>x : string
>y : number
>'' : ""

function foo2<T, U>(arg: { cb: (t: T, t2: T) => U }) {
>foo2 : <T, U>(arg: { cb: (t: T, t2: T) => U; }) => U
>arg : { cb: (t: T, t2: T) => U; }
>cb : (t: T, t2: T) => U
>t : T
>t2 : T

    return arg.cb(null, null);
>arg.cb(null, null) : U
>arg.cb : (t: T, t2: T) => U
>arg : { cb: (t: T, t2: T) => U; }
>cb : (t: T, t2: T) => U
>null : null
>null : null
}

// fewer args ok
var r4 = foo(arg); // {}
>r4 : string
>foo(arg) : string
>foo : <T, U>(arg: { cb: (t: T) => U; }) => U
>arg : { cb: <T>(x: T) => string; }

var r5 = foo({ cb: <T>(x: T) => '' }); // {}
>r5 : string
>foo({ cb: <T>(x: T) => '' }) : string
>foo : <T, U>(arg: { cb: (t: T) => U; }) => U
>{ cb: <T>(x: T) => '' } : { cb: <T>(x: T) => string; }
>cb : <T>(x: T) => string
><T>(x: T) => '' : <T>(x: T) => string
>x : T
>'' : ""

var r6 = foo({ cb: (x: string) => '' }); // string
>r6 : string
>foo({ cb: (x: string) => '' }) : string
>foo : <T, U>(arg: { cb: (t: T) => U; }) => U
>{ cb: (x: string) => '' } : { cb: (x: string) => string; }
>cb : (x: string) => string
>(x: string) => '' : (x: string) => string
>x : string
>'' : ""

var r7 = foo({ cb: () => '' }); // string
>r7 : string
>foo({ cb: () => '' }) : string
>foo : <T, U>(arg: { cb: (t: T) => U; }) => U
>{ cb: () => '' } : { cb: () => string; }
>cb : () => string
>() => '' : () => string
>'' : ""