Macro case 

macro_rules! case {
    (snake) => { ... };
    (constant) => { ... };
    (upper_snake) => { ... };
    (ada) => { ... };
    (kebab) => { ... };
    (cobol) => { ... };
    (upper_kebab) => { ... };
    (train) => { ... };
    (flat) => { ... };
    (upper_flat) => { ... };
    (pascal) => { ... };
    (upper_camel) => { ... };
    (camel) => { ... };
    (lower) => { ... };
    (upper) => { ... };
    (title) => { ... };
    (sentence) => { ... };
}

The variant of case from a token.

The token associated with each variant is the variant written in snake case. To do conversion with a macro, see ccase.