Function genco::tokens::from_fn

pub fn from_fn<F, L>(f: F) -> FromFn<F> where
    F: FnOnce(&mut Tokens<L>),
    L: Lang, 

Construct a formatter from a function.

Examples

use genco::quote_in;
use genco::lang::Lang;
use genco::tokens::{ItemStr, FormatInto, from_fn, static_literal};

fn comment<L>(s: impl Into<ItemStr>) -> impl FormatInto<L>
where
    L: Lang
{
    from_fn(move |tokens| {
        let s = s.into();
        quote_in!(*tokens => #(static_literal("//")) #s);
    })
}