#![feature(plugin_registrar, quote, rustc_private)]
extern crate syntax;
extern crate rustc;
extern crate rustc_plugin;
use syntax::codemap::Span;
use syntax::parse::token;
use syntax::ast::{TokenTree, Ident};
use syntax::ext::base::{ExtCtxt, MacResult, DummyResult, MacEager, IdentTT, get_single_str_from_tts};
use syntax::util::small_vector::SmallVector;
use rustc_plugin::Registry;
fn expand_mod_path<'a>(cx: &'a mut ExtCtxt, sp: Span, ident: Ident, tts: Vec<TokenTree>)
-> Box<MacResult + 'a> {
let path = match get_single_str_from_tts(cx, sp, &*tts, "mod_path!") {
Some(string) => string,
None => return DummyResult::expr(sp),
};
let path = &*path;
MacEager::items(SmallVector::one(quote_item!(cx,
#[path = $path]
pub mod $ident;
).unwrap()))
}
#[plugin_registrar]
pub fn plugin_registrar(reg: &mut Registry) {
reg.register_syntax_extension(token::intern("mod_path"), IdentTT(Box::new(expand_mod_path), None, false));
}