Optional+Unwrapped.swift

//
//  Optional+Unwrapped.swift
//

public enum UnwrapError: Error {
    case failedToUnwrap(file: StaticString, function: StaticString, line: UInt)
}

extension Optional {
    
    public func unwrapped(error: Error? = nil, file: StaticString = #file, function: StaticString = #function, line: UInt = #line) throws -> Wrapped {
        switch self {
        case .none:
            throw error ?? UnwrapError.failedToUnwrap(file: file, function: function, line: line)
            
        case .some(let value):
            return value
        }
    }
    
    public func unwrap(error: Error? = nil, file: StaticString = #file, function: StaticString = #function, line: UInt = #line, then: (Wrapped) -> Void) throws {
        switch self {
        case .none:
            throw error ?? UnwrapError.failedToUnwrap(file: file, function: function, line: line)
            
        case .some(let value):
            then(value)
        }
    }
}