b24050aefd
* Target types in excess property checking must match all discriminable properties This allows fewer types to be discriminated in excess properties, which fixes some examples. * Add excess property test * Fix semicolon lint * Remove extra semicolon! * Improve EPC for unions with multiple discriminants
60 lines
1.2 KiB
TypeScript
60 lines
1.2 KiB
TypeScript
// Repro from #32657
|
|
|
|
interface Base<T> {
|
|
value: T;
|
|
}
|
|
|
|
interface Int extends Base<number> {
|
|
type: "integer";
|
|
multipleOf?: number;
|
|
}
|
|
|
|
interface Float extends Base<number> {
|
|
type: "number";
|
|
}
|
|
|
|
interface Str extends Base<string> {
|
|
type: "string";
|
|
format?: string;
|
|
}
|
|
|
|
interface Bool extends Base<boolean> {
|
|
type: "boolean";
|
|
}
|
|
|
|
type Primitive = Int | Float | Str | Bool;
|
|
|
|
const foo: Primitive = {
|
|
type: "number",
|
|
value: 10,
|
|
multipleOf: 5, // excess property
|
|
format: "what?"
|
|
}
|
|
|
|
|
|
type DisjointDiscriminants = { p1: 'left'; p2: true; p3: number } | { p1: 'right'; p2: false; p4: string } | { p1: 'left'; p2: boolean };
|
|
|
|
// This has excess error because variant three is the only applicable case.
|
|
const a: DisjointDiscriminants = {
|
|
p1: 'left',
|
|
p2: false,
|
|
p3: 42,
|
|
p4: "hello"
|
|
};
|
|
|
|
// This has no excess error because variant one and three are both applicable.
|
|
const b: DisjointDiscriminants = {
|
|
p1: 'left',
|
|
p2: true,
|
|
p3: 42,
|
|
p4: "hello"
|
|
};
|
|
|
|
// This has excess error because variant two is the only applicable case
|
|
const c: DisjointDiscriminants = {
|
|
p1: 'right',
|
|
p2: false,
|
|
p3: 42,
|
|
p4: "hello"
|
|
};
|