fix union type as named group

Author: sertonix

src/index.d.ts

@@ -12,7 +12,7 @@ type NamedGroups = undefined | { [key: string]: string };
 export type TypedRegExpMatchArray<TGroups extends Groups = Groups, TNamedGroups extends NamedGroups = NamedGroups, TInputString extends string = string> = {
     index?: number;
     input?: TInputString;
-    groups: TNamedGroups extends undefined ? never : TNamedGroups;
+    groups: TNamedGroups;
 } & ( [string,...TGroups] & IntersectedArray<string,TypedRegExpMatchArray<TGroups,TNamedGroups,TInputString>> );
 
 export type TypedRegExpExecArray<TGroups extends Groups = Groups, TNamedGroups extends NamedGroups = NamedGroups, TInputString extends string = string> = TypedRegExpMatchArray<TGroups,TNamedGroups,TInputString> & {

tests/tests.ts

@@ -57,16 +57,16 @@ if (exec) {
   t(exec.index)<number>();
   t(exec.input)<"exec string">();
   t( exec.sort(() => 0) )<typeof exec>();
-  t(exec.groups)<never>();
+  t(exec.groups)<undefined>();
 } else {
   t(exec)<null>();
 }
 
 declare const match2: TypedRegExpMatchArray<[],undefined|{some?:"test group",other?:"more"}>;
 
-t(match2.groups)<{some?:"test group",other?:"more"}|never>(); // TODO fix never is ignored
+t(match2.groups)<{some?:"test group",other?:"more"}|undefined>(); // TODO fix never is ignored
 if (match2.groups) {
   t(match2.groups)<{some?:"test group",other?:"more"}>();
 } else {
-  t(match2.groups)<never>();
+  t(match2.groups)<undefined>();
 }

tsconfig.json

@@ -9,7 +9,6 @@
         "noUncheckedIndexedAccess": true,
         "noUnusedLocals": true,
         "noUnusedParameters": true,
-        "exactOptionalPropertyTypes": true,
         "moduleResolution": "node"
     }
 }