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=== tests/cases/compiler/a.ts ===
interface BigIntIndex<E> {
[index: bigint]: E; // should error
>index : bigint
}
const arr: number[] = [1, 2, 3];
>arr : number[]
>[1, 2, 3] : number[]
>1 : 1
>2 : 2
>3 : 3
let num: number = arr[1];
>num : number
>arr[1] : number
>arr : number[]
>1 : 1
num = arr["1"];
>num = arr["1"] : number
>num : number
>arr["1"] : number
>arr : number[]
>"1" : "1"
num = arr[1n]; // should error
>num = arr[1n] : any
>num : number
>arr[1n] : any
>arr : number[]
>1n : 1n
let key: keyof any; // should be type "string | number | symbol"
>key : string | number | symbol
key = 123;
>key = 123 : 123
>key : string | number | symbol
>123 : 123
key = "abc";
>key = "abc" : "abc"
>key : string | number | symbol
>"abc" : "abc"
key = Symbol();
>key = Symbol() : symbol
>key : string | number | symbol
>Symbol() : symbol
>Symbol : SymbolConstructor
key = 123n; // should error
>key = 123n : 123n
>key : string | number | symbol
>123n : 123n
// Show correct usage of bigint index: explicitly convert to string
const bigNum: bigint = 0n;
>bigNum : bigint
>0n : 0n
const typedArray = new Uint8Array(3);
>typedArray : Uint8Array
>new Uint8Array(3) : Uint8Array
>Uint8Array : Uint8ArrayConstructor
>3 : 3
typedArray[bigNum] = 0xAA; // should error
>typedArray[bigNum] = 0xAA : 170
>typedArray[bigNum] : any
>typedArray : Uint8Array
>bigNum : bigint
>0xAA : 170
typedArray[String(bigNum)] = 0xAA;
>typedArray[String(bigNum)] = 0xAA : 170
>typedArray[String(bigNum)] : any
>typedArray : Uint8Array
>String(bigNum) : string
>String : StringConstructor
>bigNum : bigint
>0xAA : 170
typedArray["1"] = 0xBB;
>typedArray["1"] = 0xBB : 187
>typedArray["1"] : number
>typedArray : Uint8Array
>"1" : "1"
>0xBB : 187
typedArray[2] = 0xCC;
>typedArray[2] = 0xCC : 204
>typedArray[2] : number
>typedArray : Uint8Array
>2 : 2
>0xCC : 204
// {1n: 123} is a syntax error; must go in separate file so BigIntIndex error is shown
=== tests/cases/compiler/b.ts ===
// BigInt cannot be used as an object literal property
const a = {1n: 123};
>a : {}
>{ : {}
>1n : 1n
>123 : 123
const b = {[1n]: 456};
>b : {}
>{[1n]: 456} : {}
>[1n] : number
>1n : 1n
>456 : 456
const c = {[bigNum]: 789};
>c : {}
>{[bigNum]: 789} : {}
>[bigNum] : number
>bigNum : bigint
>789 : 789
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