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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278
|
//// [objectSpread.ts]
let o = { a: 1, b: 'no' }
let o2 = { b: 'yes', c: true }
let swap = { a: 'yes', b: -1 };
let addAfter: { a: number, b: string, c: boolean } =
{ ...o, c: false }
let addBefore: { a: number, b: string, c: boolean } =
{ c: false, ...o }
// Note: ignore still changes the order that properties are printed
let ignore: { a: number, b: string } =
{ b: 'ignored', ...o }
let override: { a: number, b: string } =
{ ...o, b: 'override' }
let nested: { a: number, b: boolean, c: string } =
{ ...{ a: 3, ...{ b: false, c: 'overriden' } }, c: 'whatever' }
let combined: { a: number, b: string, c: boolean } =
{ ...o, ...o2 }
let combinedBefore: { a: number, b: string, c: boolean } =
{ b: 'ok', ...o, ...o2 }
let combinedMid: { a: number, b: string, c: boolean } =
{ ...o, b: 'ok', ...o2 }
let combinedAfter: { a: number, b: string, c: boolean } =
{ ...o, ...o2, b: 'ok' }
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 combinedNestedChangeType: { a: number, b: boolean, c: number } =
{ ...{ a: 1, ...{ b: false, c: 'overriden' } }, c: -1 }
let propertyNested: { a: { a: number, b: string } } =
{ a: { ... o } }
// accessors don't copy the descriptor
// (which means that readonly getters become read/write properties)
let op = { get a () { return 6 } };
let getter: { a: number, c: number } =
{ ...op, c: 7 }
getter.a = 12;
// functions result in { }
let spreadFunc = { ...(function () { }) };
type Header = { head: string, body: string, authToken: string }
function from16326(this: { header: Header }, header: Header, authToken: string): Header {
return {
...this.header,
...header,
...authToken && { authToken }
}
}
// boolean && T results in Partial<T>
function conditionalSpreadBoolean(b: boolean) : { x: number, y: number } {
let o = { x: 12, y: 13 }
o = {
...o,
...b && { x: 14 }
}
let o2 = { ...b && { x: 21 }}
return o;
}
function conditionalSpreadNumber(nt: number): { x: number, y: number } {
let o = { x: 15, y: 16 }
o = {
...o,
...nt && { x: nt }
}
let o2 = { ...nt && { x: nt }}
return o;
}
function conditionalSpreadString(st: string): { x: string, y: number } {
let o = { x: 'hi', y: 17 }
o = {
...o,
...st && { x: st }
}
let o2 = { ...st && { x: st }}
return o;
}
// any results in any
let anything: any;
let spreadAny = { ...anything };
// methods are not enumerable
class C { p = 1; m() { } }
let c: C = new C()
let spreadC: { p: number } = { ...c }
// own methods are enumerable
let cplus: { p: number, plus(): void } = { ...c, plus() { return this.p + 1; } };
cplus.plus();
// new field's type conflicting with existing field is OK
let changeTypeAfter: { a: string, b: string } =
{ ...o, a: 'wrong type?' }
let changeTypeBefore: { a: number, b: string } =
{ a: 'wrong type?', ...o };
let changeTypeBoth: { a: string, b: number } =
{ ...o, ...swap };
// optional
function container(
definiteBoolean: { sn: boolean },
definiteString: { sn: string },
optionalString: { sn?: string },
optionalNumber: { sn?: number }) {
let optionalUnionStops: { sn: string | number | boolean } = { ...definiteBoolean, ...definiteString, ...optionalNumber };
let optionalUnionDuplicates: { sn: string | number } = { ...definiteBoolean, ...definiteString, ...optionalString, ...optionalNumber };
let allOptional: { sn?: string | number } = { ...optionalString, ...optionalNumber };
// computed property
let computedFirst: { a: number, b: string, "before everything": number } =
{ ['before everything']: 12, ...o, b: 'yes' }
let computedMiddle: { a: number, b: string, c: boolean, "in the middle": number } =
{ ...o, ['in the middle']: 13, b: 'maybe?', ...o2 }
let computedAfter: { a: number, b: string, "at the end": number } =
{ ...o, b: 'yeah', ['at the end']: 14 }
}
// shortcut syntax
let a = 12;
let shortCutted: { a: number, b: string } = { ...o, a }
// non primitive
let spreadNonPrimitive = { ...<object>{}};
// generic spreads
function f<T, U>(t: T, u: U) {
return { ...t, ...u, id: 'id' };
}
let exclusive: { id: string, a: number, b: string, c: string, d: boolean } =
f({ a: 1, b: 'yes' }, { c: 'no', d: false })
let overlap: { id: string, a: number, b: string } =
f({ a: 1 }, { a: 2, b: 'extra' })
let overlapConflict: { id:string, a: string } =
f({ a: 1 }, { a: 'mismatch' })
let overwriteId: { id: string, a: number, c: number, d: string } =
f({ a: 1, id: true }, { c: 1, d: 'no' })
function genericSpread<T, U>(t: T, u: U, v: T | U, w: T | { s: string }, obj: { x: number }) {
let x01 = { ...t };
let x02 = { ...t, ...t };
let x03 = { ...t, ...u };
let x04 = { ...u, ...t };
let x05 = { a: 5, b: 'hi', ...t };
let x06 = { ...t, a: 5, b: 'hi' };
let x07 = { a: 5, b: 'hi', ...t, c: true, ...obj };
let x09 = { a: 5, ...t, b: 'hi', c: true, ...obj };
let x10 = { a: 5, ...t, b: 'hi', ...u, ...obj };
let x11 = { ...v };
let x12 = { ...v, ...obj };
let x13 = { ...w };
let x14 = { ...w, ...obj };
let x15 = { ...t, ...v };
let x16 = { ...t, ...w };
let x17 = { ...t, ...w, ...obj };
let x18 = { ...t, ...v, ...w };
}
//// [objectSpread.js]
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
var o = { a: 1, b: 'no' };
var o2 = { b: 'yes', c: true };
var swap = { a: 'yes', b: -1 };
var addAfter = __assign({}, o, { c: false });
var addBefore = __assign({ c: false }, o);
// Note: ignore still changes the order that properties are printed
var ignore = __assign({ b: 'ignored' }, o);
var override = __assign({}, o, { b: 'override' });
var nested = __assign({}, __assign({ a: 3 }, { b: false, c: 'overriden' }), { c: 'whatever' });
var combined = __assign({}, o, o2);
var combinedBefore = __assign({ b: 'ok' }, o, o2);
var combinedMid = __assign({}, o, { b: 'ok' }, o2);
var combinedAfter = __assign({}, o, o2, { b: 'ok' });
var combinedNested = __assign({}, __assign({ a: 4 }, { b: false, c: 'overriden' }), { d: 'actually new' }, { a: 5, d: 'maybe new' });
var combinedNestedChangeType = __assign({}, __assign({ a: 1 }, { b: false, c: 'overriden' }), { c: -1 });
var propertyNested = { a: __assign({}, o) };
// accessors don't copy the descriptor
// (which means that readonly getters become read/write properties)
var op = { get a() { return 6; } };
var getter = __assign({}, op, { c: 7 });
getter.a = 12;
// functions result in { }
var spreadFunc = __assign({}, (function () { }));
function from16326(header, authToken) {
return __assign({}, this.header, header, authToken && { authToken: authToken });
}
// boolean && T results in Partial<T>
function conditionalSpreadBoolean(b) {
var o = { x: 12, y: 13 };
o = __assign({}, o, b && { x: 14 });
var o2 = __assign({}, b && { x: 21 });
return o;
}
function conditionalSpreadNumber(nt) {
var o = { x: 15, y: 16 };
o = __assign({}, o, nt && { x: nt });
var o2 = __assign({}, nt && { x: nt });
return o;
}
function conditionalSpreadString(st) {
var o = { x: 'hi', y: 17 };
o = __assign({}, o, st && { x: st });
var o2 = __assign({}, st && { x: st });
return o;
}
// any results in any
var anything;
var spreadAny = __assign({}, anything);
// methods are not enumerable
var C = /** @class */ (function () {
function C() {
this.p = 1;
}
C.prototype.m = function () { };
return C;
}());
var c = new C();
var spreadC = __assign({}, c);
// own methods are enumerable
var cplus = __assign({}, c, { plus: function () { return this.p + 1; } });
cplus.plus();
// new field's type conflicting with existing field is OK
var changeTypeAfter = __assign({}, o, { a: 'wrong type?' });
var changeTypeBefore = __assign({ a: 'wrong type?' }, o);
var changeTypeBoth = __assign({}, o, swap);
// optional
function container(definiteBoolean, definiteString, optionalString, optionalNumber) {
var _a, _b, _c;
var optionalUnionStops = __assign({}, definiteBoolean, definiteString, optionalNumber);
var optionalUnionDuplicates = __assign({}, definiteBoolean, definiteString, optionalString, optionalNumber);
var allOptional = __assign({}, optionalString, optionalNumber);
// computed property
var computedFirst = __assign((_a = {}, _a['before everything'] = 12, _a), o, { b: 'yes' });
var computedMiddle = __assign({}, o, (_b = {}, _b['in the middle'] = 13, _b.b = 'maybe?', _b), o2);
var computedAfter = __assign({}, o, (_c = { b: 'yeah' }, _c['at the end'] = 14, _c));
}
// shortcut syntax
var a = 12;
var shortCutted = __assign({}, o, { a: a });
// non primitive
var spreadNonPrimitive = __assign({}, {});
// generic spreads
function f(t, u) {
return __assign({}, t, u, { id: 'id' });
}
var exclusive = f({ a: 1, b: 'yes' }, { c: 'no', d: false });
var overlap = f({ a: 1 }, { a: 2, b: 'extra' });
var overlapConflict = f({ a: 1 }, { a: 'mismatch' });
var overwriteId = f({ a: 1, id: true }, { c: 1, d: 'no' });
function genericSpread(t, u, v, w, obj) {
var x01 = __assign({}, t);
var x02 = __assign({}, t, t);
var x03 = __assign({}, t, u);
var x04 = __assign({}, u, t);
var x05 = __assign({ a: 5, b: 'hi' }, t);
var x06 = __assign({}, t, { a: 5, b: 'hi' });
var x07 = __assign({ a: 5, b: 'hi' }, t, { c: true }, obj);
var x09 = __assign({ a: 5 }, t, { b: 'hi', c: true }, obj);
var x10 = __assign({ a: 5 }, t, { b: 'hi' }, u, obj);
var x11 = __assign({}, v);
var x12 = __assign({}, v, obj);
var x13 = __assign({}, w);
var x14 = __assign({}, w, obj);
var x15 = __assign({}, t, v);
var x16 = __assign({}, t, w);
var x17 = __assign({}, t, w, obj);
var x18 = __assign({}, t, v, w);
}
|