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The spec doesn't describe the newest cast semantics #12419
Description
When casting from a type A to a type B, the spec says that either A is assignable to B, or B is assignable to A. But the playground allows something more general: in some cases, as long as A and B have a common subtype, it doesn’t warn. The next example is valid.
function f(x: number | string) {
return <number | boolean>(x);
}The playground uses the comparable relation. The spec should be updated to include it.
Activity
RyanCavanaugh commentedon Jul 20, 2020
The spec is now an "archived" artifact and we won't be tracking defects against it anymore.