Unknown node of kind "NewExpression" - When using Set values as union

[gotenxds]

This might be a fringe case and I'm going to workaround it using Enums instead but I still think this is intersting and should probably be fixed / we should add a proper error here.

When using a normal union type like so 'a' | 'b' the schema generator works just fine.
But when creating a union type from a Set (it's the same union) we an error.

to create the union first create a helper type like so:
export type SetValues<T> = T extends Set<infer V> ? V : never;

Then call this type with your set (it is important to use as const with the provided array)
type myUnion = SetValues<new Set(['a', 'b'] as const)> // 'a' | 'b'

use this type in an interface to generate a schema

Get following error:

UnknownNodeError: Unknown node of kind "NewExpression" at ChainNodeParser.getNodeParser (C:\project\node_modules\ts-json-schema-generator\src\ChainNodeParser.ts:50:15)

[arthurfiorette]

Im not sure if the example you provided is a valid TS syntax.

type myUnion = SetValues<new Set(['a', 'b'] as const)>

[gotenxds]

Hya @arthurfiorette , yes, my bad, you need to extract the set into a variable first.

Here is an example in the playground:

[arthurfiorette]

Would you like to work on a PR? Remember to add unit tests :)