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//// [intersectionWithUnionConstraint.ts]
function f1<T extends string | number, U extends string | number>(x: T & U) {
// Combined constraint of 'T & U' is 'string | number'
let y: string | number = x;
}
function f2<T extends string | number | undefined, U extends string | null | undefined>(x: T & U) {
let y1: string | number = x; // Error
let y2: string | null = x; // Error
let y3: string | undefined = x;
let y4: number | null = x; // Error
let y5: number | undefined = x; // Error
let y6: null | undefined = x; // Error
}
type T1 = (string | number | undefined) & (string | null | undefined); // string | undefined
function f3<T extends string | number | undefined>(x: T & (number | object | undefined)) {
const y: number | undefined = x;
}
function f4<T extends string | number>(x: T & (number | object)) {
const y: number = x;
}
function f5<T, U extends keyof T>(x: keyof T & U) {
let y: keyof any = x;
}
// Repro from #23648
type Example<T, U> = { [K in keyof T]: K extends keyof U ? UnexpectedError<K> : NoErrorHere<K> }
type UnexpectedError<T extends PropertyKey> = T
type NoErrorHere<T extends PropertyKey> = T
//// [intersectionWithUnionConstraint.js]
"use strict";
function f1(x) {
// Combined constraint of 'T & U' is 'string | number'
var y = x;
}
function f2(x) {
var y1 = x; // Error
var y2 = x; // Error
var y3 = x;
var y4 = x; // Error
var y5 = x; // Error
var y6 = x; // Error
}
function f3(x) {
var y = x;
}
function f4(x) {
var y = x;
}
function f5(x) {
var y = x;
}
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