Introduce type

The Introduce Type refactoring extracts a type that is inside of another type. Also, you can use this refactroing for converting the anonymous structure type to a named type.

For example, the extract operation might look like this. Consider the following JSON.

{ "email": "noah.poulsen@example.com", "gender": "male", "phone_number": "53705244", "birthdate": 1314124015, "location": { "street": "7998 oddenvej", "city": "nr åby", "state": "syddanmark", "postcode": 73617 }, "username": "purplesnake503", "password": "zelda", "first_name": "noah", "last_name": "poulsen", "title": "mr", "picture": "men/41.jpg" }

If you paste it to GoLand's editor and convert it to a struct type, you will get the T struct type with another Location struct type inside. The T struct is valid and you can continue working with it. But you might want to embed the Location type differently. See the following animation.

In the editor, click a type that you want to extract.
Click Refactor | Extract/Introduce and select Introduce Type.
The animation shows how GoLand converts the anonymous structure type to a named type. You can try the Introduce Type refactoring with the following code snippet.
package main func main() { _ = struct { Field1 string Field2 int }{ Field1: "Hello", Field2: 42, } }

Last modified: 11 February 2024