SourceLocation.swift

public struct SourceLocation: CustomDebugStringConvertible {
    init(file: String = __FILE__, line: Int = __LINE__, column: Int = __COLUMN__, function: String = __FUNCTION__) {
        self.file = file
        self.line = line
        self.column = column
        self.function = function
    }

    public let file: String
    public let line: Int
    public let column: Int
    public let function: String

    public var debugDescription: String {
        return "\(function) @ \(file):\(line):\(column)"
    }
}

Can be used to get the current location in source, as a structure.
For example:

let location = SourceLocation()
print("\(location)")
print("current file: \(location.file)")