feat: simplify IsNumericLiteral

sindresorhus · Mar 6, 2023 · d238dfc · d238dfc
1 parent 8b387f4
commit d238dfc
Showing 1 changed file with 6 additions and 4 deletions.
diff --git a/source/is-literal.d.ts b/source/is-literal.d.ts
@@ -1,4 +1,5 @@
 import type {Primitive} from './primitive';
+import type {Numeric} from './numeric';
 import type {IsNever, IsNotFalse} from './internal';
 
 /** @link https://stackoverflow.com/a/52806744/10292952 */
@@ -14,14 +15,15 @@ type LiteralCheck<T, LiteralType extends Primitive> = (
 
 type LiteralChecks<T, LiteralUnionType> = (
  // Conditional type to force union distribution
- LiteralUnionType extends Primitive
- ? IsNotFalse<LiteralCheck<T, LiteralUnionType>>
- : false
+ IsNotFalse<LiteralUnionType extends Primitive
+ ? LiteralCheck<T, LiteralUnionType>
+ : never
+ >
 );
 
 export type IsStringLiteral<T> = LiteralCheck<T, string>;
 
-export type IsNumericLiteral<T> = IsNotFalse<LiteralCheck<T, number> | LiteralCheck<T, bigint>>;
+export type IsNumericLiteral<T> = LiteralChecks<T, Numeric>;
 
 export type IsBooleanLiteral<T> = LiteralCheck<T, boolean>;