Macro futures_await_synom::do_parse

macro_rules! do_parse {
    ($i:expr, ( $($rest:expr),* )) => { ... };
    ($i:expr, $e:ident >> $($rest:tt)*) => { ... };
    ($i:expr, $submac:ident!( $($args:tt)* ) >> $($rest:tt)*) => { ... };
    ($i:expr, $field:ident : $e:ident >> $($rest:tt)*) => { ... };
    ($i:expr, $field:ident : $submac:ident!( $($args:tt)* ) >> $($rest:tt)*) => { ... };
    ($i:expr, mut $field:ident : $e:ident >> $($rest:tt)*) => { ... };
    ($i:expr, mut $field:ident : $submac:ident!( $($args:tt)* ) >> $($rest:tt)*) => { ... };
}

Run a series of parsers, one after another, optionally assigning the results a name. Fail if any of the parsers fails.

Produces the result of evaluating the final expression in parentheses with all of the previously named results bound.

• Syntax: do_parse!(name: THING1 >> THING2 >> (RESULT))
• Output: RESULT

extern crate syn;
#[macro_use] extern crate synom;
extern crate proc_macro2;

use syn::{Ident, TokenTree};
use synom::tokens::{Bang, Paren};
use proc_macro2::TokenStream;

// Parse a macro invocation like `stringify!($args)`.
named!(simple_mac -> (Ident, (TokenStream, Paren)), do_parse!(
    name: syn!(Ident) >>
    syn!(Bang) >>
    body: parens!(syn!(TokenStream)) >>
    (name, body)
));