Function named_struct 

pub fn named_struct(
    name: GeneratedToken,
    parameters: Vec<Vec<GeneratedToken>>,
    predicates: Vec<Vec<GeneratedToken>>,
    fields: Vec<Vec<GeneratedToken>>,
) -> Result<Vec<GeneratedToken>, Overflow>

One named struct struct Name<...> where ... { fields }.

Errors

Returns Overflow where the field group outgrows the declared generated-token magnitude.