objc_runtime_swiftification_sketch.swift

/// An opaque type that represents a method in a class definition.
public struct Method {
  
    public struct Description {
        /**< The name (selector) of the method */
        public var selector: Selector
        
        /**< The types of the method arguments */
        public var types: UnsafeMutablePointer<Int8>
        
        public init()
        
        public init(name: Selector, types: UnsafeMutablePointer<Int8>)
    }
  
    /**
     * Returns the name (selector) of a method.
     *
     * @return A pointer of type SEL.
     *
     * @note To get the method name as a C string, call \c sel_getName(method.selector).
     */
    @available(iOS 2.0, *)
    public var selector: Selector { get }
    
    /**
     * Returns or sets the implementation of a method.
     *
     * @return A function pointer of type IMP.
     */
    @available(iOS 2.0, *)
    public var implementation: IMP { get set }
    
    /**
     * Returns a string describing a method's parameter and return types.
     *
     * @return A C string. The string may be \c NULL.
     */
    @available(iOS 2.0, *)
    public var typeEncoding: UnsafePointer<Int8> { get }
    
    /**
     * Returns the number of arguments accepted by a method.
     *
     * @return An integer containing the number of arguments accepted by the given method.
     */
    @available(iOS 2.0, *)
    public var numberOfArguments: UInt32 { get }
    
    /**
     * Returns a string describing a method's return type.
     *
     * @return A C string describing the return type. You must free the string with \c free().
     */
    @available(iOS 2.0, *)
    public var copyReturnType: UnsafeMutablePointer<Int8> { get }
    
    /**
     * Returns a string describing a single parameter type of a method.
     *
     * @param index The index of the parameter to inspect.
     *
     * @return A C string describing the type of the parameter at index \e index, or \c NULL
     *  if method has no parameter index \e index. You must free the string with \c free().
     */
    @available(iOS 2.0, *)
    public func copyArgumentType(at index: UInt32) -> UnsafeMutablePointer<Int8>
    
    /**
     * Returns a string describing a method's return type.
     */
    @available(iOS 2.0, *)
    public var returnType: String { get }
    
    /**
     * Returns a string describing a single parameter type of a method.
     *
     * @param index The index of the parameter you want to inquire about.
     */
    @available(iOS 2.0, *)
    public func argumentType(at index: UInt32) -> String?
    
    @available(iOS 2.0, *)
    public var description: UnsafeMutablePointer<Description> { get }
    
    /**
     * Exchanges the implementations of two methods.
     *
     * @param other Method to exchange with the current method.
     */
    @available(iOS 2.0, *)
    public func exchangeImplementation(with other: Method)
}