| Literal | Type | Value |
|---|---|---|
| #file | String | The path to the file in which it appears. |
| #fileID | String | The name of the file and module in which it appears. |
| #filePath | String | The path to the file in which it appears. |
| #line | Int | The line number on which it appears. |
| #column | Int | The column number in which it begins. |
| #function | String | The name of the declaration in which it appears. |
| #dsohandle | UnsafeRawPointer | The dynamic shared object (DSO) handle in use where it appears. |
See documentation for more information
Example:
print("Function: \(#function), line: \(#line)")
With default values in parameters you can also create a function:
public func track(_ message: String, file: String = #file, function: String = #function, line: Int = #line ) {
print("\(message) called from \(function) \(file):\(line)")
}
which can be used like this
track("enters app")