quote_into 0.2.0

Easily & efficiently generate code by quoting it in a macro
Documentation 
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use proc_macro2::TokenStream;
use quote_into::quote_into;

#[test]
fn interpolation_variable() {
    let world = "world";

    let mut s = TokenStream::new();
    quote_into!(s += hello #world);
    assert_eq!(s.to_string(), "hello \"world\"");
}

#[test]
fn interpolate_in_loop() {
    let mut s = TokenStream::new();
    quote_into!(s += [#{
        for i in 0..3 {
            quote_into!(s += #i, );
        }
    }]);
    assert_eq!(s.to_string(), "[0i32 , 1i32 , 2i32 ,]");
}

#[test]
fn interpolation_block() {
    fn world(t: &mut TokenStream) {
        quote_into! {t += world }
    }

    let mut s = TokenStream::new();
    quote_into!(s += hello #{ world(s) } );
    assert_eq!(s.to_string(), "hello world");
}

#[test]
fn loop_with_nest() {
    let mut s = TokenStream::new();

    quote_into! {s +=
        #{
            for _ in 0..3 {
                quote_into!(s +=
                    hi
                );
            }
        }
    };

    assert_eq!(s.to_string(), "hi hi hi");
}

#[test]
fn interpolation_expression() {
    let mut s = TokenStream::new();
    quote_into!(s += const ANSWER: u32 =  #(7 * 6););
    assert_eq!(s.to_string(), "const ANSWER : u32 = 42i32 ;");
}

#[test]
fn attribute() {
    let mut s = TokenStream::new();

    quote_into! {s +=
        #[allow(unused)]
        fn main() {}
    };

    assert_eq!(s.to_string(), "# [allow (unused)] fn main () { }");
}