1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
// Copyright 2012-2013 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.
/*!
The compiler code necessary to implement the `#[deriving]` extensions.
FIXME (#2810): hygiene. Search for "__" strings (in other files too).
We also assume "extra" is the standard library, and "std" is the core
library.
*/
use ast::{Item, MetaItem, MetaList, MetaNameValue, MetaWord};
use ext::base::ExtCtxt;
use codemap::Span;
use std::gc::Gc;
pub mod bounds;
pub mod clone;
pub mod encodable;
pub mod decodable;
pub mod hash;
pub mod rand;
pub mod show;
pub mod zero;
pub mod default;
pub mod primitive;
#[path="cmp/eq.rs"]
pub mod eq;
#[path="cmp/totaleq.rs"]
pub mod totaleq;
#[path="cmp/ord.rs"]
pub mod ord;
#[path="cmp/totalord.rs"]
pub mod totalord;
pub mod generic;
pub fn expand_meta_deriving(cx: &mut ExtCtxt,
_span: Span,
mitem: Gc<MetaItem>,
item: Gc<Item>,
push: |Gc<Item>|) {
match mitem.node {
MetaNameValue(_, ref l) => {
cx.span_err(l.span, "unexpected value in `deriving`");
}
MetaWord(_) => {
cx.span_warn(mitem.span, "empty trait list in `deriving`");
}
MetaList(_, ref titems) if titems.len() == 0 => {
cx.span_warn(mitem.span, "empty trait list in `deriving`");
}
MetaList(_, ref titems) => {
for &titem in titems.iter().rev() {
match titem.node {
MetaNameValue(ref tname, _) |
MetaList(ref tname, _) |
MetaWord(ref tname) => {
macro_rules! expand(($func:path) => ($func(cx, titem.span,
titem, item,
|i| push(i))));
match tname.get() {
"Clone" => expand!(clone::expand_deriving_clone),
"Hash" => expand!(hash::expand_deriving_hash),
"Encodable" => expand!(encodable::expand_deriving_encodable),
"Decodable" => expand!(decodable::expand_deriving_decodable),
// NOTE: after a stage0 snap this needs treatment
"PartialEq" => expand!(eq::expand_deriving_eq),
"Eq" => expand!(totaleq::expand_deriving_totaleq),
"PartialOrd" => expand!(ord::expand_deriving_ord),
"Ord" => expand!(totalord::expand_deriving_totalord),
"Rand" => expand!(rand::expand_deriving_rand),
"Show" => expand!(show::expand_deriving_show),
"Zero" => expand!(zero::expand_deriving_zero),
"Default" => expand!(default::expand_deriving_default),
"FromPrimitive" => expand!(primitive::expand_deriving_from_primitive),
"Send" => expand!(bounds::expand_deriving_bound),
"Share" => expand!(bounds::expand_deriving_bound),
"Copy" => expand!(bounds::expand_deriving_bound),
ref tname => {
cx.span_err(titem.span,
format!("unknown `deriving` \
trait: `{}`",
*tname).as_slice());
}
};
}
}
}
}
}
}
|
