> For the complete documentation index, see [llms.txt](https://hadeslang.gitbook.io/doc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hadeslang.gitbook.io/doc/language-spec/other/annotations.md).

# Annotations

Methods, classes, structs and class-variables can be annotated with `#`. Annotations do not have to be declared. Multiple annotations can be used. An annotation can have a single value of any type.

```swift
with UserRepository //automatically imports from the first file that matches UserRepository\.hd (case insensitive)

#route("/")
func handleMain()
    put 200
end

#service
#constructor(true)
class UserService
    #injected(UserRepository)
    let userRepository
    
    func getById(id)
        put userRepository.findById(id).orElse(null)
    end
end
```