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Add run-rustfix to inefficient_to_string

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HMPerson1 2019-10-17 12:41:45 -04:00
parent 106a72592c
commit ffb53e7457
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3 changed files with 40 additions and 7 deletions
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32
tests/ui/inefficient_to_string.fixed Normal file
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@ -0,0 +1,32 @@
// run-rustfix
#![deny(clippy::inefficient_to_string)]
use std::borrow::Cow;
use std::string::ToString;
fn main() {
let rstr: &str = "hello";
let rrstr: &&str = &rstr;
let rrrstr: &&&str = &rrstr;
let _: String = rstr.to_string();
let _: String = (*rrstr).to_string();
let _: String = (**rrrstr).to_string();
let string: String = String::from("hello");
let rstring: &String = &string;
let rrstring: &&String = &rstring;
let rrrstring: &&&String = &rrstring;
let _: String = string.to_string();
let _: String = rstring.to_string();
let _: String = (*rrstring).to_string();
let _: String = (**rrrstring).to_string();
let cow: Cow<'_, str> = Cow::Borrowed("hello");
let rcow: &Cow<'_, str> = &cow;
let rrcow: &&Cow<'_, str> = &rcow;
let rrrcow: &&&Cow<'_, str> = &rrcow;
let _: String = cow.to_string();
let _: String = rcow.to_string();
let _: String = (*rrcow).to_string();
let _: String = (**rrrcow).to_string();
}

1
tests/ui/inefficient_to_string.rs
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@ -1,3 +1,4 @@
// run-rustfix
#![deny(clippy::inefficient_to_string)]
use std::borrow::Cow;

14
tests/ui/inefficient_to_string.stderr
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@ -1,18 +1,18 @@
error: calling `to_string` on `&&str`
--> $DIR/inefficient_to_string.rs:11:21
--> $DIR/inefficient_to_string.rs:12:21
|
LL | let _: String = rrstr.to_string();
| ^^^^^^^^^^^^^^^^^ help: try dereferencing the receiver: `(*rrstr).to_string()`
|
note: lint level defined here
--> $DIR/inefficient_to_string.rs:1:9
--> $DIR/inefficient_to_string.rs:2:9
|
LL | #![deny(clippy::inefficient_to_string)]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
= help: `&str` implements `ToString` through the blanket impl, but `str` specializes `ToString` directly
error: calling `to_string` on `&&&str`
--> $DIR/inefficient_to_string.rs:12:21
--> $DIR/inefficient_to_string.rs:13:21
|
LL | let _: String = rrrstr.to_string();
| ^^^^^^^^^^^^^^^^^^ help: try dereferencing the receiver: `(**rrrstr).to_string()`
@ -20,7 +20,7 @@ LL | let _: String = rrrstr.to_string();
= help: `&&str` implements `ToString` through the blanket impl, but `str` specializes `ToString` directly
error: calling `to_string` on `&&std::string::String`
--> $DIR/inefficient_to_string.rs:20:21
--> $DIR/inefficient_to_string.rs:21:21
|
LL | let _: String = rrstring.to_string();
| ^^^^^^^^^^^^^^^^^^^^ help: try dereferencing the receiver: `(*rrstring).to_string()`
@ -28,7 +28,7 @@ LL | let _: String = rrstring.to_string();
= help: `&std::string::String` implements `ToString` through the blanket impl, but `std::string::String` specializes `ToString` directly
error: calling `to_string` on `&&&std::string::String`
--> $DIR/inefficient_to_string.rs:21:21
--> $DIR/inefficient_to_string.rs:22:21
|
LL | let _: String = rrrstring.to_string();
| ^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing the receiver: `(**rrrstring).to_string()`
@ -36,7 +36,7 @@ LL | let _: String = rrrstring.to_string();
= help: `&&std::string::String` implements `ToString` through the blanket impl, but `std::string::String` specializes `ToString` directly
error: calling `to_string` on `&&std::borrow::Cow<'_, str>`
--> $DIR/inefficient_to_string.rs:29:21
--> $DIR/inefficient_to_string.rs:30:21
|
LL | let _: String = rrcow.to_string();
| ^^^^^^^^^^^^^^^^^ help: try dereferencing the receiver: `(*rrcow).to_string()`
@ -44,7 +44,7 @@ LL | let _: String = rrcow.to_string();
= help: `&std::borrow::Cow<'_, str>` implements `ToString` through the blanket impl, but `std::borrow::Cow<'_, str>` specializes `ToString` directly
error: calling `to_string` on `&&&std::borrow::Cow<'_, str>`
--> $DIR/inefficient_to_string.rs:30:21
--> $DIR/inefficient_to_string.rs:31:21
|
LL | let _: String = rrrcow.to_string();
| ^^^^^^^^^^^^^^^^^^ help: try dereferencing the receiver: `(**rrrcow).to_string()`