syntax_extension_with_dll_deps_2.rs

// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

// force-host

#![crate_type = "dylib"]
#![feature(plugin_registrar, quote, rustc_private)]

extern crate syntax_extension_with_dll_deps_1 as other;
extern crate syntax;
extern crate rustc;

use syntax::ast::{TokenTree, Item, MetaItem};
use syntax::codemap::Span;
use syntax::ext::base::*;
use rustc::plugin::Registry;

#[plugin_registrar]
pub fn plugin_registrar(reg: &mut Registry) {
    reg.register_macro("foo", expand_foo);
}

fn expand_foo(cx: &mut ExtCtxt, sp: Span, tts: &[TokenTree])
              -> Box<MacResult+'static> {
    let answer = other::the_answer();
    MacEager::expr(quote_expr!(cx, $answer))
}