Macro pascal 

macro_rules! pascal {
    ($ident:expr => ident) => { ... };
    ($ts:expr => token_stream) => { ... };
    ($s:expr) => { ... };
}

Converts a string or ident to PascalCase.

Usage

• pascal!("hello_world") → "HelloWorld" (String)
• pascal!(ident => ident) → PascalCase syn::Ident
• pascal!(token_stream => token_stream) → PascalCase last ident in path