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.DS_Store | ||
/.build | ||
/.swiftpm | ||
/Packages | ||
/*.xcodeproj | ||
xcuserdata/ |
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// swift-tools-version:5.3 | ||
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import PackageDescription | ||
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let package = Package( | ||
name: "ChainSwift", | ||
products: [ | ||
.library(name: "ChainSwift", targets: ["ChainSwift"]), | ||
], | ||
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targets: [ | ||
.target(name: "ChainSwift", dependencies: []), | ||
.testTarget(name: "ChainSwiftTests", dependencies: ["ChainSwift"]), | ||
] | ||
) |
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# ChainSwift | ||
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A description of this package. |
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// | ||
// Chain.swift | ||
// ChainSwift | ||
// | ||
// Created by Orkhan Alikhanov on 5/29/21. | ||
// | ||
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@dynamicMemberLookup | ||
public struct Chain<Base> { | ||
public var ch: Base | ||
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init(_ base: Base) { | ||
self.ch = base | ||
} | ||
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public subscript<T>(dynamicMember keyPath: WritableKeyPath<Base, T>) -> Callable<Base, T> { | ||
Callable(ch, keyPath: keyPath) | ||
} | ||
} | ||
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public class Callable<Base, T> { | ||
var base: Base | ||
var keyPath: WritableKeyPath<Base, T> | ||
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init(_ base: Base, keyPath: WritableKeyPath<Base, T>) { | ||
self.base = base | ||
self.keyPath = keyPath | ||
} | ||
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@discardableResult | ||
public func callAsFunction(_ value: T) -> Chain<Base> { | ||
base[keyPath: keyPath] = value | ||
return Chain(base) | ||
} | ||
} | ||
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public protocol Chainable { | ||
associatedtype ChainableBase | ||
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static var ch: Chain<ChainableBase>.Type { get } | ||
var ch: Chain<ChainableBase> { get } | ||
} | ||
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public extension Chainable { | ||
static var ch: Chain<Self>.Type { | ||
Chain<Self>.self | ||
} | ||
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var ch: Chain<Self> { | ||
Chain(self) | ||
} | ||
} |
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import XCTest | ||
import ChainSwift | ||
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enum MyEnum { | ||
case value1 | ||
case value2 | ||
} | ||
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class MyClass { | ||
var text = "" | ||
var int = 0 | ||
var myEnum: MyEnum = .value1 | ||
} | ||
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struct MyStruct { | ||
var text = "" | ||
var int = 0 | ||
var myEnum: MyEnum = .value1 | ||
} | ||
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extension MyClass: Chainable { } | ||
extension MyStruct: Chainable { } | ||
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/// Ensure compiles with NSObject | ||
import Foundation | ||
extension NSObject: Chainable { } | ||
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final class ChainSwiftTests: XCTestCase { | ||
func testClassWorks() { | ||
let myClass = MyClass() | ||
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XCTAssertEqual(myClass.text, "") | ||
XCTAssertEqual(myClass.int, 0) | ||
XCTAssertEqual(myClass.myEnum, .value1) | ||
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myClass.ch | ||
.text("It works") | ||
.int(99) | ||
.myEnum(.value2) | ||
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XCTAssertEqual(myClass.text, "It works") | ||
XCTAssertEqual(myClass.int, 99) | ||
XCTAssertEqual(myClass.myEnum, .value2) | ||
} | ||
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func testTakingChValueWorks() { | ||
let myClass = MyClass().ch | ||
.text("It works") | ||
.int(99) | ||
.myEnum(.value2) | ||
.ch | ||
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XCTAssertEqual(myClass.text, "It works") | ||
XCTAssertEqual(myClass.int, 99) | ||
XCTAssertEqual(myClass.myEnum, .value2) | ||
} | ||
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func testStructWorks() { | ||
let myStruct = MyStruct() | ||
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XCTAssertEqual(myStruct.text, "") | ||
XCTAssertEqual(myStruct.int, 0) | ||
XCTAssertEqual(myStruct.myEnum, .value1) | ||
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let updatedMyStruct = myStruct.ch | ||
.text("It works") | ||
.int(99) | ||
.myEnum(.value2) | ||
.ch | ||
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XCTAssertEqual(myStruct.text, "") | ||
XCTAssertEqual(myStruct.int, 0) | ||
XCTAssertEqual(myStruct.myEnum, .value1) | ||
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XCTAssertEqual(updatedMyStruct.text, "It works") | ||
XCTAssertEqual(updatedMyStruct.int, 99) | ||
XCTAssertEqual(updatedMyStruct.myEnum, .value2) | ||
} | ||
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static var allTests = [ | ||
("testClassWorks", testClassWorks), | ||
("testTakingChValueWorks", testTakingChValueWorks), | ||
("testStructWorks", testStructWorks), | ||
] | ||
} |
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import XCTest | ||
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#if !canImport(ObjectiveC) | ||
public func allTests() -> [XCTestCaseEntry] { | ||
return [ | ||
testCase(ChainSwiftTests.allTests), | ||
] | ||
} | ||
#endif |
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import XCTest | ||
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import ChainSwiftTests | ||
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var tests = [XCTestCaseEntry]() | ||
tests += ChainSwiftTests.allTests() | ||
XCTMain(tests) |