Macro case 

case!() { /* proc-macro */ }

Small macro that converts the input path to a given case.

The general accepted format is: case!(path::to::Type => Case)

Hereby

• path::to::Type can be any path. It does not need to exist.
• => is just a fat arrow that separates the two parameters.
• Case is any path that points to any value of the convert_case crate’s Case enum.

This macro always expands to a &str literal (LitStr).

Examples

The identifier given does not need to be an existing type:

use mongodb_ext_derive::case;

// `MyImaginaryType` is not imported, but works anyways
// `Case` is not imported, but works anyways
assert_eq!(
    case!(MyImaginaryType => Case::Camel),
    "myImaginaryType"
);

If a path is given, only the last element will be parsed:

use mongodb_ext_derive::case;

assert_eq!(
    case!(std::collection::HashMap => Snake),
    "hash_map"
);

use mongodb_ext_derive::case;

assert_eq!(
    case!(std::this::r#type::does::not::exist::THIS_CONSTANT_DOES_NOT_EXIST => Pascal),
    "ThisConstantDoesNotExist"
);

assert_eq!(
    case!(std::this::r#type::does::not::exist::this_function_does_not_exist => Title),
    "This Function Does Not Exist"
);

assert_eq!(
    case!(std::this::r#type::does::not::exist::ThisTypeDoesNotExist => Camel),
    "thisTypeDoesNotExist"
);