mirror of
https://github.com/swc-project/swc.git
synced 2024-12-18 19:21:33 +03:00
77 lines
2.6 KiB
TypeScript
77 lines
2.6 KiB
TypeScript
// @target: es5
|
|
// @strictNullChecks: true
|
|
let o = { a: 1, b: 'no' }
|
|
|
|
/// private propagates
|
|
class PrivateOptionalX {
|
|
private x?: number;
|
|
}
|
|
class PublicX {
|
|
public x: number;
|
|
}
|
|
declare let publicX: PublicX;
|
|
declare let privateOptionalX: PrivateOptionalX;
|
|
let o2 = { ...publicX, ...privateOptionalX };
|
|
let sn: number = o2.x; // error, x is private
|
|
declare let optionalString: { sn?: string };
|
|
declare let optionalNumber: { sn?: number };
|
|
let allOptional: { sn: string | number } = { ...optionalString, ...optionalNumber };
|
|
// error, 'sn' is optional in source, required in target
|
|
|
|
// assignability as target
|
|
interface Bool { b: boolean };
|
|
interface Str { s: string };
|
|
let spread = { ...{ b: true }, ...{s: "foo" } };
|
|
spread = { s: "foo" }; // error, missing 'b'
|
|
let b = { b: false };
|
|
spread = b; // error, missing 's'
|
|
|
|
// literal repeats are not allowed, but spread repeats are fine
|
|
let duplicated = { b: 'bad', ...o, b: 'bad', ...o2, b: 'bad' }
|
|
let duplicatedSpread = { ...o, ...o }
|
|
// Note: ignore changes the order that properties are printed
|
|
let ignore: { a: number, b: string } =
|
|
{ b: 'ignored', ...o }
|
|
|
|
let o3 = { a: 1, b: 'no' }
|
|
let o4 = { b: 'yes', c: true }
|
|
let combinedBefore: { a: number, b: string, c: boolean } =
|
|
{ b: 'ok', ...o3, ...o4 }
|
|
let combinedMid: { a: number, b: string, c: boolean } =
|
|
{ ...o3, b: 'ok', ...o4 }
|
|
let combinedNested: { a: number, b: boolean, c: string, d: string } =
|
|
{ ...{ a: 4, ...{ b: false, c: 'overriden' } }, d: 'actually new', ...{ a: 5, d: 'maybe new' } }
|
|
let changeTypeBefore: { a: number, b: string } =
|
|
{ a: 'wrong type?', ...o3 };
|
|
let computedMiddle: { a: number, b: string, c: boolean, "in the middle": number } =
|
|
{ ...o3, ['in the middle']: 13, b: 'maybe?', ...o4 }
|
|
|
|
// primitives are not allowed, except for falsy ones
|
|
let spreadNum = { ...12 };
|
|
let spreadSum = { ...1 + 1 };
|
|
let spreadZero = { ...0 };
|
|
spreadZero.toFixed(); // error, no methods even from a falsy number
|
|
let spreadBool = { ...true };
|
|
spreadBool.valueOf();
|
|
let spreadStr = { ...'foo' };
|
|
spreadStr.length; // error, no 'length'
|
|
spreadStr.charAt(1); // error, no methods either
|
|
// functions are skipped
|
|
let spreadFunc = { ...function () { } }
|
|
spreadFunc(); // error, no call signature
|
|
|
|
// write-only properties get skipped
|
|
let setterOnly = { ...{ set b (bad: number) { } } };
|
|
setterOnly.b = 12; // error, 'b' does not exist
|
|
|
|
// methods are skipped because they aren't enumerable
|
|
class C { p = 1; m() { } }
|
|
let c: C = new C()
|
|
let spreadC = { ...c }
|
|
spreadC.m(); // error 'm' is not in '{ ... c }'
|
|
|
|
// non primitive
|
|
let obj: object = { a: 123 };
|
|
let spreadObj = { ...obj };
|
|
spreadObj.a; // error 'a' is not in {}
|