1 // Copyright 2013 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 use ast::{MetaItem, Item, Expr};
13 use ext::base::ExtCtxt;
14 use ext::build::AstBuilder;
15 use ext::deriving::generic::*;
16 use ext::deriving::generic::ty::*;
17 use parse::token::InternedString;
20 pub fn expand_deriving_totaleq(cx: &mut ExtCtxt,
25 fn cs_total_eq_assert(cx: &mut ExtCtxt, span: Span, substr: &Substructure) -> P<Expr> {
26 cs_same_method(|cx, span, exprs| {
27 // create `a.<method>(); b.<method>(); c.<method>(); ...`
28 // (where method is `assert_receiver_is_total_eq`)
29 let stmts = exprs.move_iter().map(|e| cx.stmt_expr(e)).collect();
30 let block = cx.block(span, stmts, None);
33 |cx, sp, _, _| cx.span_bug(sp, "non matching enums in deriving(Eq)?"),
39 let inline = cx.meta_word(span, InternedString::new("inline"));
40 let hidden = cx.meta_word(span, InternedString::new("hidden"));
41 let doc = cx.meta_list(span, InternedString::new("doc"), vec!(hidden));
42 let attrs = vec!(cx.attribute(span, inline),
43 cx.attribute(span, doc));
44 let trait_def = TraitDef {
46 attributes: Vec::new(),
47 path: Path::new(vec!("std", "cmp", "Eq")),
48 additional_bounds: Vec::new(),
49 generics: LifetimeBounds::empty(),
52 name: "assert_receiver_is_total_eq",
53 generics: LifetimeBounds::empty(),
54 explicit_self: borrowed_explicit_self(),
58 combine_substructure: combine_substructure(|a, b, c| {
59 cs_total_eq_assert(a, b, c)
64 trait_def.expand(cx, mitem, item, push)