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optional parameter
1 parent c341cd7 commit e67d6e5

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-67
lines changed

‎src/lib/es2022.array.d.ts

+13-13
Original file line numberDiff line numberDiff line change
@@ -3,101 +3,101 @@ interface Array<T> {
33
* Returns the item located at the specified index.
44
* @param index The zero-based index of the desired code unit. A negative index will count back from the last item.
55
*/
6-
at(index: number): T;
6+
at(index?: number): T;
77
}
88

99
interface ReadonlyArray<T> {
1010
/**
1111
* Returns the item located at the specified index.
1212
* @param index The zero-based index of the desired code unit. A negative index will count back from the last item.
1313
*/
14-
at(index: number): T;
14+
at(index?: number): T;
1515
}
1616

1717
interface Int8Array {
1818
/**
1919
* Returns the item located at the specified index.
2020
* @param index The zero-based index of the desired code unit. A negative index will count back from the last item.
2121
*/
22-
at(index: number): number;
22+
at(index?: number): number;
2323
}
2424

2525
interface Uint8Array {
2626
/**
2727
* Returns the item located at the specified index.
2828
* @param index The zero-based index of the desired code unit. A negative index will count back from the last item.
2929
*/
30-
at(index: number): number;
30+
at(index?: number): number;
3131
}
3232

3333
interface Uint8ClampedArray {
3434
/**
3535
* Returns the item located at the specified index.
3636
* @param index The zero-based index of the desired code unit. A negative index will count back from the last item.
3737
*/
38-
at(index: number): number;
38+
at(index?: number): number;
3939
}
4040

4141
interface Int16Array {
4242
/**
4343
* Returns the item located at the specified index.
4444
* @param index The zero-based index of the desired code unit. A negative index will count back from the last item.
4545
*/
46-
at(index: number): number;
46+
at(index?: number): number;
4747
}
4848

4949
interface Uint16Array {
5050
/**
5151
* Returns the item located at the specified index.
5252
* @param index The zero-based index of the desired code unit. A negative index will count back from the last item.
5353
*/
54-
at(index: number): number;
54+
at(index?: number): number;
5555
}
5656

5757
interface Int32Array {
5858
/**
5959
* Returns the item located at the specified index.
6060
* @param index The zero-based index of the desired code unit. A negative index will count back from the last item.
6161
*/
62-
at(index: number): number;
62+
at(index?: number): number;
6363
}
6464

6565
interface Uint32Array {
6666
/**
6767
* Returns the item located at the specified index.
6868
* @param index The zero-based index of the desired code unit. A negative index will count back from the last item.
6969
*/
70-
at(index: number): number;
70+
at(index?: number): number;
7171
}
7272

7373
interface Float32Array {
7474
/**
7575
* Returns the item located at the specified index.
7676
* @param index The zero-based index of the desired code unit. A negative index will count back from the last item.
7777
*/
78-
at(index: number): number;
78+
at(index?: number): number;
7979
}
8080

8181
interface Float64Array {
8282
/**
8383
* Returns the item located at the specified index.
8484
* @param index The zero-based index of the desired code unit. A negative index will count back from the last item.
8585
*/
86-
at(index: number): number;
86+
at(index?: number): number;
8787
}
8888

8989
interface BigInt64Array {
9090
/**
9191
* Returns the item located at the specified index.
9292
* @param index The zero-based index of the desired code unit. A negative index will count back from the last item.
9393
*/
94-
at(index: number): number;
94+
at(index?: number): number;
9595
}
9696

9797
interface BigUint64Array {
9898
/**
9999
* Returns the item located at the specified index.
100100
* @param index The zero-based index of the desired code unit. A negative index will count back from the last item.
101101
*/
102-
at(index: number): number;
102+
at(index?: number): number;
103103
}

‎src/lib/es2022.string.d.ts

+1-1
Original file line numberDiff line numberDiff line change
@@ -3,5 +3,5 @@ interface String {
33
* Returns a new String consisting of the single UTF-16 code unit located at the specified index.
44
* @param index The zero-based index of the desired code unit. A negative index will count back from the last item.
55
*/
6-
at(index: number): string;
6+
at(index?: number): string;
77
}

‎tests/baselines/reference/indexAt(target=es2021).errors.txt

+54-1
Original file line numberDiff line numberDiff line change
@@ -11,9 +11,22 @@ tests/cases/compiler/indexAt.ts(10,20): error TS2550: Property 'at' does not exi
1111
tests/cases/compiler/indexAt.ts(11,20): error TS2550: Property 'at' does not exist on type 'Float64Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
1212
tests/cases/compiler/indexAt.ts(12,21): error TS2550: Property 'at' does not exist on type 'BigInt64Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
1313
tests/cases/compiler/indexAt.ts(13,22): error TS2550: Property 'at' does not exist on type 'BigUint64Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
14+
tests/cases/compiler/indexAt.ts(15,5): error TS2550: Property 'at' does not exist on type 'number[]'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
15+
tests/cases/compiler/indexAt.ts(16,7): error TS2550: Property 'at' does not exist on type '"foo"'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
16+
tests/cases/compiler/indexAt.ts(17,17): error TS2550: Property 'at' does not exist on type 'Int8Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
17+
tests/cases/compiler/indexAt.ts(18,18): error TS2550: Property 'at' does not exist on type 'Uint8Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
18+
tests/cases/compiler/indexAt.ts(19,25): error TS2550: Property 'at' does not exist on type 'Uint8ClampedArray'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
19+
tests/cases/compiler/indexAt.ts(20,18): error TS2550: Property 'at' does not exist on type 'Int16Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
20+
tests/cases/compiler/indexAt.ts(21,19): error TS2550: Property 'at' does not exist on type 'Uint16Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
21+
tests/cases/compiler/indexAt.ts(22,18): error TS2550: Property 'at' does not exist on type 'Int32Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
22+
tests/cases/compiler/indexAt.ts(23,19): error TS2550: Property 'at' does not exist on type 'Uint32Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
23+
tests/cases/compiler/indexAt.ts(24,20): error TS2550: Property 'at' does not exist on type 'Float32Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
24+
tests/cases/compiler/indexAt.ts(25,20): error TS2550: Property 'at' does not exist on type 'Float64Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
25+
tests/cases/compiler/indexAt.ts(26,21): error TS2550: Property 'at' does not exist on type 'BigInt64Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
26+
tests/cases/compiler/indexAt.ts(27,22): error TS2550: Property 'at' does not exist on type 'BigUint64Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
1427

1528

16-
==== tests/cases/compiler/indexAt.ts (13 errors) ====
29+
==== tests/cases/compiler/indexAt.ts (26 errors) ====
1730
[0].at(0);
1831
~~
1932
!!! error TS2550: Property 'at' does not exist on type 'number[]'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
@@ -53,4 +66,44 @@ tests/cases/compiler/indexAt.ts(13,22): error TS2550: Property 'at' does not exi
5366
new BigUint64Array().at(0);
5467
~~
5568
!!! error TS2550: Property 'at' does not exist on type 'BigUint64Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
69+
70+
[0].at();
71+
~~
72+
!!! error TS2550: Property 'at' does not exist on type 'number[]'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
73+
"foo".at();
74+
~~
75+
!!! error TS2550: Property 'at' does not exist on type '"foo"'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
76+
new Int8Array().at();
77+
~~
78+
!!! error TS2550: Property 'at' does not exist on type 'Int8Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
79+
new Uint8Array().at();
80+
~~
81+
!!! error TS2550: Property 'at' does not exist on type 'Uint8Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
82+
new Uint8ClampedArray().at();
83+
~~
84+
!!! error TS2550: Property 'at' does not exist on type 'Uint8ClampedArray'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
85+
new Int16Array().at();
86+
~~
87+
!!! error TS2550: Property 'at' does not exist on type 'Int16Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
88+
new Uint16Array().at();
89+
~~
90+
!!! error TS2550: Property 'at' does not exist on type 'Uint16Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
91+
new Int32Array().at();
92+
~~
93+
!!! error TS2550: Property 'at' does not exist on type 'Int32Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
94+
new Uint32Array().at();
95+
~~
96+
!!! error TS2550: Property 'at' does not exist on type 'Uint32Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
97+
new Float32Array().at();
98+
~~
99+
!!! error TS2550: Property 'at' does not exist on type 'Float32Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
100+
new Float64Array().at();
101+
~~
102+
!!! error TS2550: Property 'at' does not exist on type 'Float64Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
103+
new BigInt64Array().at();
104+
~~
105+
!!! error TS2550: Property 'at' does not exist on type 'BigInt64Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
106+
new BigUint64Array().at();
107+
~~
108+
!!! error TS2550: Property 'at' does not exist on type 'BigUint64Array'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2022' or later.
56109

‎tests/baselines/reference/indexAt(target=es2021).js

+27
Original file line numberDiff line numberDiff line change
@@ -12,6 +12,20 @@ new Float32Array().at(0);
1212
new Float64Array().at(0);
1313
new BigInt64Array().at(0);
1414
new BigUint64Array().at(0);
15+
16+
[0].at();
17+
"foo".at();
18+
new Int8Array().at();
19+
new Uint8Array().at();
20+
new Uint8ClampedArray().at();
21+
new Int16Array().at();
22+
new Uint16Array().at();
23+
new Int32Array().at();
24+
new Uint32Array().at();
25+
new Float32Array().at();
26+
new Float64Array().at();
27+
new BigInt64Array().at();
28+
new BigUint64Array().at();
1529

1630

1731
//// [indexAt.js]
@@ -28,3 +42,16 @@ new Float32Array().at(0);
2842
new Float64Array().at(0);
2943
new BigInt64Array().at(0);
3044
new BigUint64Array().at(0);
45+
[0].at();
46+
"foo".at();
47+
new Int8Array().at();
48+
new Uint8Array().at();
49+
new Uint8ClampedArray().at();
50+
new Int16Array().at();
51+
new Uint16Array().at();
52+
new Int32Array().at();
53+
new Uint32Array().at();
54+
new Float32Array().at();
55+
new Float64Array().at();
56+
new BigInt64Array().at();
57+
new BigUint64Array().at();

‎tests/baselines/reference/indexAt(target=es2021).symbols

+35
Original file line numberDiff line numberDiff line change
@@ -34,3 +34,38 @@ new BigInt64Array().at(0);
3434
new BigUint64Array().at(0);
3535
>BigUint64Array : Symbol(BigUint64Array, Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --))
3636

37+
[0].at();
38+
"foo".at();
39+
new Int8Array().at();
40+
>Int8Array : Symbol(Int8Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2016.array.include.d.ts, --, --))
41+
42+
new Uint8Array().at();
43+
>Uint8Array : Symbol(Uint8Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2016.array.include.d.ts, --, --))
44+
45+
new Uint8ClampedArray().at();
46+
>Uint8ClampedArray : Symbol(Uint8ClampedArray, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2016.array.include.d.ts, --, --))
47+
48+
new Int16Array().at();
49+
>Int16Array : Symbol(Int16Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2016.array.include.d.ts, --, --))
50+
51+
new Uint16Array().at();
52+
>Uint16Array : Symbol(Uint16Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2016.array.include.d.ts, --, --))
53+
54+
new Int32Array().at();
55+
>Int32Array : Symbol(Int32Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2016.array.include.d.ts, --, --))
56+
57+
new Uint32Array().at();
58+
>Uint32Array : Symbol(Uint32Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2016.array.include.d.ts, --, --))
59+
60+
new Float32Array().at();
61+
>Float32Array : Symbol(Float32Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2016.array.include.d.ts, --, --))
62+
63+
new Float64Array().at();
64+
>Float64Array : Symbol(Float64Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2016.array.include.d.ts, --, --))
65+
66+
new BigInt64Array().at();
67+
>BigInt64Array : Symbol(BigInt64Array, Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --))
68+
69+
new BigUint64Array().at();
70+
>BigUint64Array : Symbol(BigUint64Array, Decl(lib.es2020.bigint.d.ts, --, --), Decl(lib.es2020.bigint.d.ts, --, --))
71+

‎tests/baselines/reference/indexAt(target=es2021).types

+90
Original file line numberDiff line numberDiff line change
@@ -102,3 +102,93 @@ new BigUint64Array().at(0);
102102
>at : any
103103
>0 : 0
104104

105+
[0].at();
106+
>[0].at() : any
107+
>[0].at : any
108+
>[0] : number[]
109+
>0 : 0
110+
>at : any
111+
112+
"foo".at();
113+
>"foo".at() : any
114+
>"foo".at : any
115+
>"foo" : "foo"
116+
>at : any
117+
118+
new Int8Array().at();
119+
>new Int8Array().at() : any
120+
>new Int8Array().at : any
121+
>new Int8Array() : Int8Array
122+
>Int8Array : Int8ArrayConstructor
123+
>at : any
124+
125+
new Uint8Array().at();
126+
>new Uint8Array().at() : any
127+
>new Uint8Array().at : any
128+
>new Uint8Array() : Uint8Array
129+
>Uint8Array : Uint8ArrayConstructor
130+
>at : any
131+
132+
new Uint8ClampedArray().at();
133+
>new Uint8ClampedArray().at() : any
134+
>new Uint8ClampedArray().at : any
135+
>new Uint8ClampedArray() : Uint8ClampedArray
136+
>Uint8ClampedArray : Uint8ClampedArrayConstructor
137+
>at : any
138+
139+
new Int16Array().at();
140+
>new Int16Array().at() : any
141+
>new Int16Array().at : any
142+
>new Int16Array() : Int16Array
143+
>Int16Array : Int16ArrayConstructor
144+
>at : any
145+
146+
new Uint16Array().at();
147+
>new Uint16Array().at() : any
148+
>new Uint16Array().at : any
149+
>new Uint16Array() : Uint16Array
150+
>Uint16Array : Uint16ArrayConstructor
151+
>at : any
152+
153+
new Int32Array().at();
154+
>new Int32Array().at() : any
155+
>new Int32Array().at : any
156+
>new Int32Array() : Int32Array
157+
>Int32Array : Int32ArrayConstructor
158+
>at : any
159+
160+
new Uint32Array().at();
161+
>new Uint32Array().at() : any
162+
>new Uint32Array().at : any
163+
>new Uint32Array() : Uint32Array
164+
>Uint32Array : Uint32ArrayConstructor
165+
>at : any
166+
167+
new Float32Array().at();
168+
>new Float32Array().at() : any
169+
>new Float32Array().at : any
170+
>new Float32Array() : Float32Array
171+
>Float32Array : Float32ArrayConstructor
172+
>at : any
173+
174+
new Float64Array().at();
175+
>new Float64Array().at() : any
176+
>new Float64Array().at : any
177+
>new Float64Array() : Float64Array
178+
>Float64Array : Float64ArrayConstructor
179+
>at : any
180+
181+
new BigInt64Array().at();
182+
>new BigInt64Array().at() : any
183+
>new BigInt64Array().at : any
184+
>new BigInt64Array() : BigInt64Array
185+
>BigInt64Array : BigInt64ArrayConstructor
186+
>at : any
187+
188+
new BigUint64Array().at();
189+
>new BigUint64Array().at() : any
190+
>new BigUint64Array().at : any
191+
>new BigUint64Array() : BigUint64Array
192+
>BigUint64Array : BigUint64ArrayConstructor
193+
>at : any
194+

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