fixed optional arg detection in Subscript helper type in generateTypings

samualtnorman · samualtnorman · commit 432d6defb6bb · 2020-11-24T17:19:05.000Z
diff --git a/index.ts b/index.ts
@@ -386,7 +386,7 @@ export async function generateTypings(srcDir: string, target: string, hackmudPat
 	}
 
 	o += `
-type Subscript<T extends (...args: any) => any> = Parameters<T>[1] extends undefined
+type Subscript<T extends (...args: any) => any> = undefined extends Parameters<T>[1]
 	? (args?: Parameters<T>[1]) => ReturnType<T> | ScriptFailure
 	: (args: Parameters<T>[1]) => ReturnType<T> | ScriptFailure
 

Original file line number	Diff line number	Diff line change
`@@ -386,7 +386,7 @@ export async function generateTypings(srcDir: string, target: string, hackmudPat`
`386`	`386`	`}`
`387`	`387`
`388`	`388`	o += `
`389`		`-type Subscript<T extends (...args: any) => any> = Parameters<T>[1] extends undefined`
	`389`	`+type Subscript<T extends (...args: any) => any> = undefined extends Parameters<T>[1]`
`390`	`390`	`? (args?: Parameters<T>[1]) => ReturnType<T> \| ScriptFailure`
`391`	`391`	`: (args: Parameters<T>[1]) => ReturnType<T> \| ScriptFailure`
`392`	`392`