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node_modules/effect/src/Unify.ts

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+/**
+ * @since 2.0.0
+ */
+
+import { identity } from "./Function.js"
+
+/**
+ * @since 2.0.0
+ */
+export declare const unifySymbol: unique symbol
+
+/**
+ * @since 2.0.0
+ */
+export type unifySymbol = typeof unifySymbol
+
+/**
+ * @since 2.0.0
+ */
+export declare const typeSymbol: unique symbol
+
+/**
+ * @since 2.0.0
+ */
+export type typeSymbol = typeof typeSymbol
+
+/**
+ * @since 2.0.0
+ */
+export declare const ignoreSymbol: unique symbol
+
+/**
+ * @since 2.0.0
+ */
+export type ignoreSymbol = typeof ignoreSymbol
+
+type MaybeReturn<F> = F extends () => infer R ? R : NonNullable<F>
+
+type Values<X extends [any, any]> = X extends [infer A, infer Ignore]
+  ? Exclude<keyof A, Ignore> extends infer k ? k extends keyof A ? MaybeReturn<A[k]> : never : never
+  : never
+
+type Ignore<X> = X extends { [ignoreSymbol]?: infer Obj } ? keyof NonNullable<Obj>
+  : never
+
+type ExtractTypes<
+  X
+> = X extends {
+  [typeSymbol]?: infer _Type
+  [unifySymbol]?: infer _Unify
+} ? [NonNullable<_Unify>, Ignore<X>]
+  : never
+
+type FilterIn<A> = A extends any ? typeSymbol extends keyof A ? A : never : never
+
+type FilterOut<A> = A extends any ? typeSymbol extends keyof A ? never : A : never
+
+/**
+ * @since 2.0.0
+ */
+export type Unify<A> = Values<
+  ExtractTypes<
+    (
+      & FilterIn<A>
+      & { [typeSymbol]: A }
+    )
+  >
+> extends infer Z ? Z | Exclude<A, Z> | FilterOut<A> : never
+
+/**
+ * @since 2.0.0
+ */
+export const unify: {
+  /**
+   * @since 2.0.0
+   */
+  <
+    Args extends Array<any>,
+    Args2 extends Array<any>,
+    Args3 extends Array<any>,
+    Args4 extends Array<any>,
+    Args5 extends Array<any>,
+    T
+  >(
+    x: (...args: Args) => (...args: Args2) => (...args: Args3) => (...args: Args4) => (...args: Args5) => T
+  ): (...args: Args) => (...args: Args2) => (...args: Args3) => (...args: Args4) => (...args: Args5) => Unify<T>
+  /**
+   * @since 2.0.0
+   */
+  <
+    Args extends Array<any>,
+    Args2 extends Array<any>,
+    Args3 extends Array<any>,
+    Args4 extends Array<any>,
+    T
+  >(
+    x: (...args: Args) => (...args: Args2) => (...args: Args3) => (...args: Args4) => T
+  ): (...args: Args) => (...args: Args2) => (...args: Args3) => (...args: Args4) => Unify<T>
+  /**
+   * @since 2.0.0
+   */
+  <
+    Args extends Array<any>,
+    Args2 extends Array<any>,
+    Args3 extends Array<any>,
+    T
+  >(x: (...args: Args) => (...args: Args2) => (...args: Args3) => T): (...args: Args) => (...args: Args2) => (...args: Args3) => Unify<T>
+  /**
+   * @since 2.0.0
+   */
+  <
+    Args extends Array<any>,
+    Args2 extends Array<any>,
+    T
+  >(x: (...args: Args) => (...args: Args2) => T): (...args: Args) => (...args: Args2) => Unify<T>
+  /**
+   * @since 2.0.0
+   */
+  <
+    Args extends Array<any>,
+    T
+  >(x: (...args: Args) => T): (...args: Args) => Unify<T>
+  /**
+   * @since 2.0.0
+   */
+  <T>(x: T): Unify<T>
+} = identity as any