FormPathLeaves caused a memory leak when using svelte-package.

Fixes #404

Author: ciscoheat

CHANGELOG.md

@@ -5,6 +5,12 @@ Headlines: Added, Changed, Deprecated, Removed, Fixed, Security
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+
+- `FormPathLeaves` caused a memory leak when using `svelte-package`.
+
 ## [2.12.3] - 2024-04-08
 
 ### Fixed

src/lib/stringPath.ts

@@ -24,32 +24,28 @@ type BuiltInObjects = Date | Set<unknown> | File;
 /**
  * Lists all paths in an object as string accessors.
  */
-export type FormPath<T extends object, Type = any> = string & T extends any
-	? StringPath<T, { filter: 'all'; objAppend: never; path: ''; type: Type }>
-	: never;
+export type FormPath<T extends object, Type = any> = string &
+	StringPath<T, { filter: 'all'; objAppend: never; path: ''; type: Type }>;
 
 /**
  * List paths in an object as string accessors, but only with non-objects as accessible properties.
  * Similar to the leaves in a node tree, if you look at the object as a tree structure.
  */
-export type FormPathLeaves<T extends object, Type = any> = string & T extends any
-	? StringPath<T, { filter: 'leaves'; objAppend: never; path: ''; type: Type }>
-	: never;
+export type FormPathLeaves<T extends object, Type = any> = string &
+	StringPath<T, { filter: 'leaves'; objAppend: never; path: ''; type: Type }>;
 
 /**
  * List paths in an object as string accessors, but only with non-objects as accessible properties.
  * Also includes the _errors field for objects and arrays.
  */
-export type FormPathLeavesWithErrors<T extends object, Type = any> = string & T extends any
-	? StringPath<T, { filter: 'leaves'; objAppend: '_errors'; path: ''; type: Type }>
-	: never;
+export type FormPathLeavesWithErrors<T extends object, Type = any> = string &
+	StringPath<T, { filter: 'leaves'; objAppend: '_errors'; path: ''; type: Type }>;
 
 /**
  * List all arrays in an object as string accessors.
  */
-export type FormPathArrays<T extends object, Type = any> = string & T extends any
-	? StringPath<T, { filter: 'arrays'; objAppend: never; path: ''; type: Type }>
-	: never;
+export type FormPathArrays<T extends object, Type = any> = string &
+	StringPath<T, { filter: 'arrays'; objAppend: never; path: ''; type: Type }>;
 
 type Concat<
 	Path extends string,