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体验新版 GitCode,发现更多精彩内容 >>
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a9d3b349
编写于
5月 02, 2017
作者:
F
F001
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电子邮件补丁
差异文件
Suggest `!` for bitwise negation when encountering a `~`
上级
4d81b14b
变更
3
隐藏空白更改
内联
并排
Showing
3 changed file
with
36 addition
and
0 deletion
+36
-0
src/libsyntax/parse/parser.rs
src/libsyntax/parse/parser.rs
+13
-0
src/test/ui/did_you_mean/issue-41679.rs
src/test/ui/did_you_mean/issue-41679.rs
+13
-0
src/test/ui/did_you_mean/issue-41679.stderr
src/test/ui/did_you_mean/issue-41679.stderr
+10
-0
未找到文件。
src/libsyntax/parse/parser.rs
浏览文件 @
a9d3b349
...
...
@@ -2700,6 +2700,19 @@ pub fn parse_prefix_expr(&mut self,
let
(
span
,
e
)
=
self
.interpolated_or_expr_span
(
e
)
?
;
(
span
,
self
.mk_unary
(
UnOp
::
Not
,
e
))
}
// Suggest `!` for bitwise negation when encountering a `~`
token
::
Tilde
=>
{
self
.bump
();
let
e
=
self
.parse_prefix_expr
(
None
);
let
(
span
,
e
)
=
self
.interpolated_or_expr_span
(
e
)
?
;
let
span_of_tilde
=
lo
;
let
mut
err
=
self
.diagnostic
()
.struct_span_err
(
span_of_tilde
,
"`~` can not be used as an unary operator"
);
err
.span_label
(
span_of_tilde
,
&
"did you mean `!`?"
);
err
.help
(
"use `!` instead of `~` if you meant to perform bitwise negation"
);
err
.emit
();
(
span
,
self
.mk_unary
(
UnOp
::
Not
,
e
))
}
token
::
BinOp
(
token
::
Minus
)
=>
{
self
.bump
();
let
e
=
self
.parse_prefix_expr
(
None
);
...
...
src/test/ui/did_you_mean/issue-41679.rs
0 → 100644
浏览文件 @
a9d3b349
// Copyright 2017 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.
fn
main
()
{
let
x
=
~
1
;
}
src/test/ui/did_you_mean/issue-41679.stderr
0 → 100644
浏览文件 @
a9d3b349
error: `~` can not be used as an unary operator
--> $DIR/issue-41679.rs:12:13
|
12 | let x = ~1;
| ^ did you mean `!`?
|
= help: use `!` instead of `~` if you meant to perform bitwise negation
error: aborting due to previous error
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