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24efea72
编写于
3月 11, 2013
作者:
A
Andrew Paseltiner
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电子邮件补丁
差异文件
syntax: implement #[deriving] meta-attribute
上级
e9a0db6a
变更
6
隐藏空白更改
内联
并排
Showing
6 changed file
with
134 addition
and
0 deletion
+134
-0
src/libsyntax/ext/base.rs
src/libsyntax/ext/base.rs
+3
-0
src/libsyntax/ext/deriving.rs
src/libsyntax/ext/deriving.rs
+42
-0
src/test/compile-fail/deriving-meta-unknown-trait.rs
src/test/compile-fail/deriving-meta-unknown-trait.rs
+14
-0
src/test/run-pass/deriving-meta-empty-trait-list.rs
src/test/run-pass/deriving-meta-empty-trait-list.rs
+19
-0
src/test/run-pass/deriving-meta-multiple.rs
src/test/run-pass/deriving-meta-multiple.rs
+29
-0
src/test/run-pass/deriving-meta.rs
src/test/run-pass/deriving-meta.rs
+27
-0
未找到文件。
src/libsyntax/ext/base.rs
浏览文件 @
24efea72
...
...
@@ -148,6 +148,9 @@ fn builtin_item_tt(f: SyntaxExpanderTTItemFun) -> @Transformer {
syntax_expanders
.insert
(
@~
"log_syntax"
,
builtin_normal_tt
(
ext
::
log_syntax
::
expand_syntax_ext
));
syntax_expanders
.insert
(
@~
"deriving"
,
@
SE
(
ItemDecorator
(
ext
::
deriving
::
expand_meta_deriving
)));
syntax_expanders
.insert
(
@~
"deriving_eq"
,
@
SE
(
ItemDecorator
(
ext
::
deriving
::
expand_deriving_eq
)));
...
...
src/libsyntax/ext/deriving.rs
浏览文件 @
24efea72
...
...
@@ -56,6 +56,48 @@ fn to_binop(self) -> binop {
ident
,
y
:
&
Generics
)
->
@
item
;
pub
fn
expand_meta_deriving
(
cx
:
ext_ctxt
,
_
span
:
span
,
mitem
:
@
meta_item
,
in_items
:
~
[
@
item
])
->
~
[
@
item
]
{
use
ast
::{
meta_list
,
meta_name_value
,
meta_word
};
match
mitem
.node
{
meta_name_value
(
_
,
l
)
=>
{
cx
.span_err
(
l
.span
,
~
"unexpected value in `deriving`"
);
in_items
}
meta_word
(
_
)
|
meta_list
(
_
,
[])
=>
{
cx
.span_warn
(
mitem
.span
,
~
"empty trait list in `deriving`"
);
in_items
}
meta_list
(
_
,
titems
)
=>
{
do
titems
.foldr
(
in_items
)
|
&
titem
,
in_items
|
{
match
titem
.node
{
meta_name_value
(
tname
,
_
)
|
meta_list
(
tname
,
_
)
|
meta_word
(
tname
)
=>
{
match
*
tname
{
~
"Clone"
=>
expand_deriving_clone
(
cx
,
titem
.span
,
titem
,
in_items
),
~
"Eq"
=>
expand_deriving_eq
(
cx
,
titem
.span
,
titem
,
in_items
),
~
"IterBytes"
=>
expand_deriving_iter_bytes
(
cx
,
titem
.span
,
titem
,
in_items
),
tname
=>
{
cx
.span_err
(
titem
.span
,
fmt!
(
"unknown
\
`deriving` trait: `%s`"
,
tname
));
in_items
}
}
}
}
}
}
}
}
pub
fn
expand_deriving_eq
(
cx
:
ext_ctxt
,
span
:
span
,
_
mitem
:
@
meta_item
,
...
...
src/test/compile-fail/deriving-meta-unknown-trait.rs
0 → 100644
浏览文件 @
24efea72
// 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.
#[deriving(Eqr)]
//~ ERROR unknown `deriving` trait: `Eqr`
struct
Foo
;
pub
fn
main
()
{}
src/test/run-pass/deriving-meta-empty-trait-list.rs
0 → 100644
浏览文件 @
24efea72
// xfail-pretty
// 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.
#[deriving]
//~ WARNING empty trait list in `deriving`
struct
Foo
;
#[deriving()]
//~ WARNING empty trait list in `deriving`
struct
Bar
;
pub
fn
main
()
{}
src/test/run-pass/deriving-meta-multiple.rs
0 → 100644
浏览文件 @
24efea72
// xfail-fast
// 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.
#[deriving(Eq)]
#[deriving(Clone)]
#[deriving(IterBytes)]
struct
Foo
{
bar
:
uint
,
baz
:
int
}
pub
fn
main
()
{
use
core
::
hash
::{
Hash
,
HashUtil
};
// necessary for IterBytes check
let
a
=
Foo
{
bar
:
4
,
baz
:
-
3
};
a
==
a
;
// check for Eq impl w/o testing its correctness
a
.clone
();
// check for Clone impl w/o testing its correctness
a
.hash
();
// check for IterBytes impl w/o testing its correctness
}
src/test/run-pass/deriving-meta.rs
0 → 100644
浏览文件 @
24efea72
// xfail-fast
// 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.
#[deriving(Eq,
Clone,
IterBytes)]
struct
Foo
{
bar
:
uint
,
baz
:
int
}
pub
fn
main
()
{
use
core
::
hash
::{
Hash
,
HashUtil
};
// necessary for IterBytes check
let
a
=
Foo
{
bar
:
4
,
baz
:
-
3
};
a
==
a
;
// check for Eq impl w/o testing its correctness
a
.clone
();
// check for Clone impl w/o testing its correctness
a
.hash
();
// check for IterBytes impl w/o testing its correctness
}
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