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// 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.
use ast::{MetaItem, MetaWord, Item};
use codemap::Span;
use ext::base::ExtCtxt;
use ext::deriving::generic::*;
use ext::deriving::generic::ty::*;
use std::gc::Gc;
pub fn expand_deriving_bound(cx: &mut ExtCtxt,
span: Span,
mitem: Gc<MetaItem>,
item: Gc<Item>,
push: |Gc<Item>|) {
let name = match mitem.node {
MetaWord(ref tname) => {
match tname.get() {
"Copy" => "Copy",
"Send" => "Send",
"Share" => "Share",
ref tname => {
cx.span_bug(span,
format!("expected built-in trait name but \
found {}",
*tname).as_slice())
}
}
},
_ => {
return cx.span_err(span, "unexpected value in deriving, expected \
a trait")
}
};
let trait_def = TraitDef {
span: span,
attributes: Vec::new(),
path: Path::new(vec!("std", "kinds", name)),
additional_bounds: Vec::new(),
generics: LifetimeBounds::empty(),
methods: vec!()
};
trait_def.expand(cx, mitem, item, push)
}
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