63 lines
1.7 KiB
Rust
63 lines
1.7 KiB
Rust
#![allow(unused_variables, dead_code)]
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//@no-rustfix
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fn takes_an_immutable_reference(a: &i32) {}
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fn takes_a_mutable_reference(a: &mut i32) {}
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mod issue11268 {
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macro_rules! x {
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($f:expr) => {
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$f(&mut 1);
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};
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}
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fn f() {
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x!(super::takes_an_immutable_reference);
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x!(super::takes_a_mutable_reference);
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}
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}
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struct MyStruct;
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impl MyStruct {
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fn takes_an_immutable_reference(&self, a: &i32) {}
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fn takes_a_mutable_reference(&self, a: &mut i32) {}
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//~^ ERROR: this argument is a mutable reference, but not used mutably
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//~| NOTE: `-D clippy::needless-pass-by-ref-mut` implied by `-D warnings`
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}
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#[warn(clippy::unnecessary_mut_passed)]
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fn main() {
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// Functions
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takes_an_immutable_reference(&mut 42);
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//~^ ERROR: the function `takes_an_immutable_reference` doesn't need a mutable referen
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//~| NOTE: `-D clippy::unnecessary-mut-passed` implied by `-D warnings`
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let as_ptr: fn(&i32) = takes_an_immutable_reference;
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as_ptr(&mut 42);
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//~^ ERROR: the function `as_ptr` doesn't need a mutable reference
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// Methods
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let my_struct = MyStruct;
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my_struct.takes_an_immutable_reference(&mut 42);
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//~^ ERROR: the method `takes_an_immutable_reference` doesn't need a mutable reference
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// No error
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// Functions
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takes_an_immutable_reference(&42);
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let as_ptr: fn(&i32) = takes_an_immutable_reference;
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as_ptr(&42);
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takes_a_mutable_reference(&mut 42);
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let as_ptr: fn(&mut i32) = takes_a_mutable_reference;
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as_ptr(&mut 42);
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let a = &mut 42;
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takes_an_immutable_reference(a);
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// Methods
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my_struct.takes_an_immutable_reference(&42);
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my_struct.takes_a_mutable_reference(&mut 42);
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my_struct.takes_an_immutable_reference(a);
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}
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