/*
* @license Apache-2.0
*
* Copyright (c) 2025 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*    http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

// TypeScript Version: 4.1

/**
* Copies own enumerable and inherited properties from one or more source objects to a target object.
*
* ## Notes
*
* -   If a property key is present in multiple sources, the property from the last source that defines the key prevails.
* -   The target object is mutated.
* -   Both string and symbol properties are copied.
*
* @param target - target object
* @param source - source object
* @throws first argument must not be null or undefined
* @returns target object
*
* @example
* function Foo() {
*     this.a = 1;
*     return this;
* }
*
* Foo.prototype.b = 2;
*
* function Bar() {
*     this.c = 3;
*     return this;
* }
*
* Bar.prototype.d = 4;
*
* var out = assignIn( {}, new Foo(), new Bar() );
* // returns { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
*/
declare function assignIn<T extends object, U>( target: T, source: U ): T & U;

/**
* Copies own and inherited enumerable properties from one or more source objects to a target object.
*
* ## Notes
*
* -   If a property key is present in multiple sources, the property from the last source that defines the key prevails.
* -   The target object is mutated.
* -   Both string and symbol properties are copied.
*
* @param target - target object
* @param source1 - first source object
* @param source2 - second source object
* @throws first argument must not be null or undefined
* @returns target object
*
* @example
* function Foo() {
*     this.a = 1;
*     return this;
* }
*
* Foo.prototype.b = 2;
*
* function Bar() {
*     this.c = 3;
*     return this;
* }
*
* Bar.prototype.d = 4;
*
* var beep = {
*     'e': 5
* };
*
* var out = assignIn( {}, new Foo(), new Bar(), beep );
* // returns { 'a': 1, 'b': 2, 'c': 3, 'd': 4, 'e': 5 }
*/
declare function assignIn<T extends object, U, V>( target: T, source1: U, source2: V ): T & U & V;

/**
* Copies own and inherited enumerable properties from one or more source objects to a target object.
*
* ## Notes
*
* -   If a property key is present in multiple sources, the property from the last source that defines the key prevails.
* -   The target object is mutated.
* -   Both string and symbol properties are copied.
*
* @param target - target object
* @param source1 - first source object
* @param source2 - second source object
* @param source3 - third source object
* @throws first argument must not be null or undefined
* @returns target object
*
* @example
* function Foo() {
*     this.a = 1;
*     return this;
* }
*
* Foo.prototype.b = 2;
*
* function Bar() {
*     this.c = 3;
*     return this;
* }
*
* Bar.prototype.d = 4;
*
* var beep = {
*     'e': 5
* };
*
* var boop = {
*     'f': 6
* };
*
* var out = assignIn( {}, new Foo(), new Bar(), beep, boop );
* // returns { 'a': 1, 'b': 2, 'c': 3, 'd': 4, 'e': 5, 'f': 6 }
*/
declare function assignIn<T extends object, U, V, W>( target: T, source1: U, source2: V, source3: W ): T & U & V & W;

/**
* Copies own and inherited enumerable properties from one or more source objects to a target object.
*
* ## Notes
*
* -   If a property key is present in multiple sources, the property from the last source that defines the key prevails.
* -   The target object is mutated.
* -   Both string and symbol properties are copied.
*
* @param target - target object
* @param source - source object(s)
* @throws first argument must not be null or undefined
* @returns target object
*
* @example
* function Foo() {
*     this.a = 1;
*     return this;
* }
*
* Foo.prototype.b = 2;
*
* function Bar() {
*     this.c = 3;
*     return this;
* }
*
* Bar.prototype.d = 4;
*
* var out = assignIn( {}, new Foo(), new Bar() );
* // returns { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
*/
declare function assignIn( target: object, ...source: Array<any> ): object;


// EXPORTS //

export = assignIn;