Round-trip literals faithfully

[dtolnay]

extern crate syn;

#[macro_use]
extern crate quote;

fn main() {
    let ref int = syn::parse_token_trees("0_0").unwrap()[0];
    println!("{}", quote!(#int));
}

0

This should print 0_0. Relevant for making sure not to corrupt input to other macros: #124.

[mystor]

This should be fixed by #147, as we faithfully parse integers into Literal objects and don't interpret them now.

[mystor]

This is fixed on master 🎊 (see #158)