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// Copyright 2013 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, item, Expr};
use codemap::Span;
use ext::base::ExtCtxt;
use ext::build::AstBuilder;
use ext::deriving::generic::*;
pub fn expand_deriving_totaleq(cx: &ExtCtxt,
span: Span,
mitem: @MetaItem,
in_items: ~[@item]) -> ~[@item] {
fn cs_equals(cx: &ExtCtxt, span: Span, substr: &Substructure) -> @Expr {
cs_and(|cx, span, _, _| cx.expr_bool(span, false),
cx, span, substr)
}
let trait_def = TraitDef {
cx: cx, span: span,
path: Path::new(~["std", "cmp", "TotalEq"]),
additional_bounds: ~[],
generics: LifetimeBounds::empty(),
methods: ~[
MethodDef {
name: "equals",
generics: LifetimeBounds::empty(),
explicit_self: borrowed_explicit_self(),
args: ~[borrowed_self()],
ret_ty: Literal(Path::new(~["bool"])),
inline: true,
const_nonmatching: true,
combine_substructure: cs_equals
}
]
};
trait_def.expand(mitem, in_items)
}
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