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Add new ui tests for map_clone
lint on types implementing Copy
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3 changed files with 97 additions and 7 deletions
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@ -69,15 +69,48 @@ fn main() {
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//~^ ERROR: you are explicitly cloning with `.map()`
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let y = x.cloned();
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//~^ ERROR: you are explicitly cloning with `.map()`
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//~| HELP: consider calling the dedicated `cloned` method
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let y = x.cloned();
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//~^ ERROR: you are explicitly cloning with `.map()`
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//~| HELP: consider calling the dedicated `cloned` method
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let x: Option<u32> = Some(0);
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let x = x.as_ref(); // We do this to prevent triggering the `useless_asref` lint.
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let y = x.copied();
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//~^ ERROR: you are explicitly cloning with `.map()`
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//~| HELP: consider calling the dedicated `copied` method
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let y = x.copied();
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//~^ ERROR: you are explicitly cloning with `.map()`
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//~| HELP: consider calling the dedicated `copied` method
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// Should not suggest `copied` or `cloned` here since `T` is not a reference.
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let x: Option<u32> = Some(0);
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let y = x.map(|x| u32::clone(&x));
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let y = x.map(|x| Clone::clone(&x));
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// Testing with `Result` now.
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let x: Result<String, ()> = Ok(String::new());
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let x = x.as_ref(); // We do this to prevent triggering the `useless_asref` lint.
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let y = x.cloned();
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//~^ ERROR: you are explicitly cloning with `.map()`
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//~| HELP: consider calling the dedicated `cloned` method
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let y = x.cloned();
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//~^ ERROR: you are explicitly cloning with `.map()`
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//~| HELP: consider calling the dedicated `cloned` method
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let x: Result<u32, ()> = Ok(0);
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let x = x.as_ref(); // We do this to prevent triggering the `useless_asref` lint.
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let y = x.copied();
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//~^ ERROR: you are explicitly cloning with `.map()`
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//~| HELP: consider calling the dedicated `copied` method
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let y = x.copied();
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//~^ ERROR: you are explicitly cloning with `.map()`
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//~| HELP: consider calling the dedicated `copied` method
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// Should not suggest `copied` or `cloned` here since `T` is not a reference.
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let x: Result<u32, ()> = Ok(0);
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let y = x.map(|x| u32::clone(&x));
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let y = x.map(|x| Clone::clone(&x));
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// We ensure that no warning is emitted here because `useless_asref` is taking over.
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let x = Some(String::new());
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@ -69,15 +69,48 @@ fn main() {
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//~^ ERROR: you are explicitly cloning with `.map()`
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let y = x.map(Clone::clone);
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//~^ ERROR: you are explicitly cloning with `.map()`
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//~| HELP: consider calling the dedicated `cloned` method
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let y = x.map(String::clone);
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//~^ ERROR: you are explicitly cloning with `.map()`
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//~| HELP: consider calling the dedicated `cloned` method
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let x: Option<u32> = Some(0);
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let x = x.as_ref(); // We do this to prevent triggering the `useless_asref` lint.
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let y = x.map(|x| u32::clone(x));
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//~^ ERROR: you are explicitly cloning with `.map()`
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//~| HELP: consider calling the dedicated `copied` method
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let y = x.map(|x| Clone::clone(x));
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//~^ ERROR: you are explicitly cloning with `.map()`
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//~| HELP: consider calling the dedicated `copied` method
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// Should not suggest `copied` or `cloned` here since `T` is not a reference.
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let x: Option<u32> = Some(0);
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let y = x.map(|x| u32::clone(&x));
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let y = x.map(|x| Clone::clone(&x));
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// Testing with `Result` now.
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let x: Result<String, ()> = Ok(String::new());
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let x = x.as_ref(); // We do this to prevent triggering the `useless_asref` lint.
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let y = x.map(|x| String::clone(x));
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//~^ ERROR: you are explicitly cloning with `.map()`
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let y = x.map(|x| String::clone(x));
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//~| HELP: consider calling the dedicated `cloned` method
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let y = x.map(|x| Clone::clone(x));
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//~^ ERROR: you are explicitly cloning with `.map()`
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//~| HELP: consider calling the dedicated `cloned` method
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let x: Result<u32, ()> = Ok(0);
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let x = x.as_ref(); // We do this to prevent triggering the `useless_asref` lint.
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let y = x.map(|x| u32::clone(x));
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//~^ ERROR: you are explicitly cloning with `.map()`
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//~| HELP: consider calling the dedicated `copied` method
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let y = x.map(|x| Clone::clone(x));
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//~^ ERROR: you are explicitly cloning with `.map()`
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//~| HELP: consider calling the dedicated `copied` method
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// Should not suggest `copied` or `cloned` here since `T` is not a reference.
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let x: Result<u32, ()> = Ok(0);
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let y = x.map(|x| u32::clone(&x));
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let y = x.map(|x| Clone::clone(&x));
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// We ensure that no warning is emitted here because `useless_asref` is taking over.
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let x = Some(String::new());
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@ -50,22 +50,46 @@ LL | let y = x.map(Clone::clone);
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| ^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `cloned` method: `x.cloned()`
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error: you are explicitly cloning with `.map()`
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--> $DIR/map_clone.rs:72:13
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--> $DIR/map_clone.rs:73:13
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LL | let y = x.map(String::clone);
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| ^^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `cloned` method: `x.cloned()`
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error: you are explicitly cloning with `.map()`
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--> $DIR/map_clone.rs:78:13
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--> $DIR/map_clone.rs:79:13
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LL | let y = x.map(|x| u32::clone(x));
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| ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `copied` method: `x.copied()`
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error: you are explicitly cloning with `.map()`
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--> $DIR/map_clone.rs:82:13
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LL | let y = x.map(|x| Clone::clone(x));
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `copied` method: `x.copied()`
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error: you are explicitly cloning with `.map()`
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--> $DIR/map_clone.rs:94:13
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LL | let y = x.map(|x| String::clone(x));
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `cloned` method: `x.cloned()`
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error: you are explicitly cloning with `.map()`
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--> $DIR/map_clone.rs:80:13
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--> $DIR/map_clone.rs:97:13
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LL | let y = x.map(|x| String::clone(x));
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `cloned` method: `x.cloned()`
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LL | let y = x.map(|x| Clone::clone(x));
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `cloned` method: `x.cloned()`
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error: aborting due to 11 previous errors
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error: you are explicitly cloning with `.map()`
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--> $DIR/map_clone.rs:103:13
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LL | let y = x.map(|x| u32::clone(x));
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| ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `copied` method: `x.copied()`
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error: you are explicitly cloning with `.map()`
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--> $DIR/map_clone.rs:106:13
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LL | let y = x.map(|x| Clone::clone(x));
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `copied` method: `x.copied()`
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error: aborting due to 15 previous errors
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