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git.proxmox.com Git - rustc.git/blob - src/libsyntax/ext/deriving/cmp/totaleq.rs
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
<F
>(cx
: &mut ExtCtxt
,
27 fn cs_total_eq_assert(cx
: &mut ExtCtxt
, span
: Span
, substr
: &Substructure
) -> P
<Expr
> {
28 cs_same_method(|cx
, span
, exprs
| {
29 // create `a.<method>(); b.<method>(); c.<method>(); ...`
30 // (where method is `assert_receiver_is_total_eq`)
31 let stmts
= exprs
.into_iter().map(|e
| cx
.stmt_expr(e
)).collect();
32 let block
= cx
.block(span
, stmts
, None
);
35 Box
::new(|cx
, sp
, _
, _
| {
36 cx
.span_bug(sp
, "non matching enums in derive(Eq)?") }),
42 let inline
= cx
.meta_word(span
, InternedString
::new("inline"));
43 let hidden
= cx
.meta_word(span
, InternedString
::new("hidden"));
44 let doc
= cx
.meta_list(span
, InternedString
::new("doc"), vec
!(hidden
));
45 let attrs
= vec
!(cx
.attribute(span
, inline
),
46 cx
.attribute(span
, doc
));
47 let trait_def
= TraitDef
{
49 attributes
: Vec
::new(),
50 path
: path_std
!(cx
, core
::cmp
::Eq
),
51 additional_bounds
: Vec
::new(),
52 generics
: LifetimeBounds
::empty(),
55 name
: "assert_receiver_is_total_eq",
56 generics
: LifetimeBounds
::empty(),
57 explicit_self
: borrowed_explicit_self(),
61 combine_substructure
: combine_substructure(Box
::new(|a
, b
, c
| {
62 cs_total_eq_assert(a
, b
, c
)
66 associated_types
: Vec
::new(),
68 trait_def
.expand(cx
, mitem
, item
, push
)