Generate Code From Usage

Generate Code From Usage feature available in every modern IDE enables you to use classes, members, methods, ... before you define them.

Why

• This minimizes interruption to your workflow
• You can think about your code as a consumer it is particularly useful when you use TDD
  • It generates new types and members in the source code when you first reference them in your test cases, before they are defined
• Your IDE is more reliable and create code faster than us, so it will avoid you a lot of mistales

Problems

• How can I be more efficient when using my IDE?
• How may I avoid mistakes when writing code?

How to

Red stuff appears for undefined identifiers. When you rest the mouse pointer on the identifier, an error message appears in a tooltip.

Depending on your IDE and Operating System shortcuts can differ but you should be able to access options like:

• Generate property
• Generate field
• Generate method
• Generate class
• Generate new type (for a class, struct, interface, record, or other data structures)

Example

• Imagine we want to implement a test like this

• We can create Hunter type directly from here
  • Go on the red part
  • From Rider contextual we can display available actions
  • You have the same kind of actions in every good IDE

• We can then create our methods directly from our tests as well

Constraint

You are authorized to create new code only from usage (from a test or production code)

Resources

• Rider generate code from usage
• Generate code from IntelliJ
• Visual Studio Generate from usage Feature