Add Swift support

[evgenyigumnov]

Launch example

rustsn --lang=swift

Example query:

take 2 parameters and add them and return the result

Example generation:

Package.swift

// swift-tools-version:5.7
import PackageDescription

let package = Package(
    name: "Solution",
    products: [
        .executable(name: "Solution", targets: ["Solution"]),
    ],
    dependencies: [
        .package(url: "https://github.com/apple/swift-test.git", from: "1.0.0"),
    ],
    targets: [
        .target(
            name: "Solution",
            dependencies: []),
        .testTarget(
            name: "SolutionTests",
            dependencies: ["Solution"]),
    ]
)

Sources/Solution/main.swift

public func solution(a: Any, b: Any) -> Any {
    if let intA = a as? Int, let intB = b as? Int {
        return intA + intB
    } else if let stringA = a as? String, let intB = b as? Int {
        return stringA + String(intB)
    }
    return "Invalid input types"
}

// Example usage
// print(solution(a: 1, b: 2)) // Outputs: 3

Tests/SolutionTests/SolutionTests.swift

import XCTest
@testable import Solution

final class SolutionTests: XCTestCase {
    func testAdditionOfIntegers() {
        XCTAssertEqual(solution(a: 1, b: 2) as? Int, 3)
    }

    func testAdditionOfNegativeIntegers() {
        XCTAssertEqual(solution(a: -1, b: -2) as? Int, -3)
    }

    func testAdditionOfStringAndInteger() {
        XCTAssertEqual(solution(a: "1", b: 2) as? String, "12")
    }

    func testInvalidInputTypes() {
        XCTAssertEqual(solution(a: 1.5, b: "test") as? String, "Invalid input types")
    }
}

Example install dependencies

swift package resolve

Example build the project

swift build

Example run tests

swift test