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
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
use rustc_data_structures::sync::Lrc;
use syntax::ast;
use syntax::ext::base::{Annotatable, ExtCtxt, SyntaxExtension, Resolver};
use syntax::ext::build::AstBuilder;
use syntax::ext::hygiene::{Mark, SyntaxContext};
use syntax::ptr::P;
use syntax::symbol::Symbol;
use syntax_pos::Span;
macro_rules! span_err_if_not_stage0 {
($cx:expr, $sp:expr, $code:ident, $text:tt) => {
#[cfg(not(stage0))] {
span_err!($cx, $sp, $code, $text)
}
#[cfg(stage0)] {
$cx.span_err($sp, $text)
}
}
}
macro path_local($x:ident) {
generic::ty::Path::new_local(stringify!($x))
}
macro pathvec_std($cx:expr, $($rest:ident)::+) {{
vec![ $( stringify!($rest) ),+ ]
}}
macro path_std($($x:tt)*) {
generic::ty::Path::new( pathvec_std!( $($x)* ) )
}
pub mod bounds;
pub mod clone;
pub mod encodable;
pub mod decodable;
pub mod hash;
pub mod debug;
pub mod default;
pub mod custom;
#[path="cmp/partial_eq.rs"]
pub mod partial_eq;
#[path="cmp/eq.rs"]
pub mod eq;
#[path="cmp/partial_ord.rs"]
pub mod partial_ord;
#[path="cmp/ord.rs"]
pub mod ord;
pub mod generic;
macro_rules! derive_traits {
($( $name:expr => $func:path, )+) => {
pub fn is_builtin_trait(name: ast::Name) -> bool {
match &*name.as_str() {
$( $name )|+ => true,
_ => false,
}
}
pub fn register_builtin_derives(resolver: &mut Resolver) {
$(
resolver.add_builtin(
ast::Ident::with_empty_ctxt(Symbol::intern($name)),
Lrc::new(SyntaxExtension::BuiltinDerive($func))
);
)*
}
}
}
derive_traits! {
"Clone" => clone::expand_deriving_clone,
"Hash" => hash::expand_deriving_hash,
"RustcEncodable" => encodable::expand_deriving_rustc_encodable,
"RustcDecodable" => decodable::expand_deriving_rustc_decodable,
"PartialEq" => partial_eq::expand_deriving_partial_eq,
"Eq" => eq::expand_deriving_eq,
"PartialOrd" => partial_ord::expand_deriving_partial_ord,
"Ord" => ord::expand_deriving_ord,
"Debug" => debug::expand_deriving_debug,
"Default" => default::expand_deriving_default,
"Send" => bounds::expand_deriving_unsafe_bound,
"Sync" => bounds::expand_deriving_unsafe_bound,
"Copy" => bounds::expand_deriving_copy,
"Encodable" => encodable::expand_deriving_encodable,
"Decodable" => decodable::expand_deriving_decodable,
}
#[inline]
fn warn_if_deprecated(ecx: &mut ExtCtxt, sp: Span, name: &str) {
if let Some(replacement) = match name {
"Encodable" => Some("RustcEncodable"),
"Decodable" => Some("RustcDecodable"),
_ => None,
} {
ecx.span_warn(sp,
&format!("derive({}) is deprecated in favor of derive({})",
name,
replacement));
}
}
fn hygienic_type_parameter(item: &Annotatable, base: &str) -> String {
let mut typaram = String::from(base);
if let Annotatable::Item(ref item) = *item {
match item.node {
ast::ItemKind::Struct(_, ast::Generics { ref params, .. }) |
ast::ItemKind::Enum(_, ast::Generics { ref params, .. }) => {
for param in params.iter() {
if let ast::GenericParam::Type(ref ty) = *param{
typaram.push_str(&ty.ident.as_str());
}
}
}
_ => {}
}
}
typaram
}
fn call_intrinsic(cx: &ExtCtxt,
mut span: Span,
intrinsic: &str,
args: Vec<P<ast::Expr>>)
-> P<ast::Expr> {
if cx.current_expansion.mark.expn_info().unwrap().callee.allow_internal_unstable {
span = span.with_ctxt(cx.backtrace());
} else {
let mut info = cx.current_expansion.mark.expn_info().unwrap();
info.callee.allow_internal_unstable = true;
let mark = Mark::fresh(Mark::root());
mark.set_expn_info(info);
span = span.with_ctxt(SyntaxContext::empty().apply_mark(mark));
}
let path = cx.std_path(&["intrinsics", intrinsic]);
let call = cx.expr_call_global(span, path, args);
cx.expr_block(P(ast::Block {
stmts: vec![cx.stmt_expr(call)],
id: ast::DUMMY_NODE_ID,
rules: ast::BlockCheckMode::Unsafe(ast::CompilerGenerated),
span,
recovered: false,
}))
}