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Properly handle Self type for trivially_copy_pass_by_ref

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This commit is contained in:
LeSeulArtichaut 2021-08-05 18:11:08 +02:00
parent 2dbf0c138d
commit ccb5d73dec
3 changed files with 17 additions and 9 deletions
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4
clippy_lints/src/pass_by_ref_or_value.rs
View file

@ -2,9 +2,9 @@ use std::cmp;
use std::iter;
use clippy_utils::diagnostics::span_lint_and_sugg;
use clippy_utils::is_self_ty;
use clippy_utils::source::snippet;
use clippy_utils::ty::is_copy;
use clippy_utils::{is_self, is_self_ty};
use if_chain::if_chain;
use rustc_ast::attr;
use rustc_errors::Applicability;
@ -170,7 +170,7 @@ impl<'tcx> PassByRefOrValue {
if size <= self.ref_min_size;
if let hir::TyKind::Rptr(_, MutTy { ty: decl_ty, .. }) = input.kind;
then {
let value_type = if is_self_ty(decl_ty) {
let value_type = if fn_body.and_then(|body| body.params.get(index)).map_or(false, is_self) {
"self".into()
} else {
snippet(cx, decl_ty.span, "_").into()

2
tests/ui/trivially_copy_pass_by_ref.rs
View file

@ -58,6 +58,8 @@ impl Foo {
fn bad(&self, x: &u32, y: &Foo, z: &Baz) {}
fn bad2(x: &u32, y: &Foo, z: &Baz) {}
fn bad_issue7518(self, other: &Self) {}
}
impl AsRef<u32> for Foo {

20
tests/ui/trivially_copy_pass_by_ref.stderr
View file

@ -65,40 +65,46 @@ LL | fn bad2(x: &u32, y: &Foo, z: &Baz) {}
| ^^^^ help: consider passing by value instead: `Baz`
error: this argument (N byte) is passed by reference, but would be more efficient if passed by value (limit: N byte)
--> $DIR/trivially_copy_pass_by_ref.rs:72:16
--> $DIR/trivially_copy_pass_by_ref.rs:62:35
|
LL | fn bad_issue7518(self, other: &Self) {}
| ^^^^^ help: consider passing by value instead: `Self`
error: this argument (N byte) is passed by reference, but would be more efficient if passed by value (limit: N byte)
--> $DIR/trivially_copy_pass_by_ref.rs:74:16
|
LL | fn bad2(x: &u32, y: &Foo, z: &Baz) {}
| ^^^^ help: consider passing by value instead: `u32`
error: this argument (N byte) is passed by reference, but would be more efficient if passed by value (limit: N byte)
--> $DIR/trivially_copy_pass_by_ref.rs:72:25
--> $DIR/trivially_copy_pass_by_ref.rs:74:25
|
LL | fn bad2(x: &u32, y: &Foo, z: &Baz) {}
| ^^^^ help: consider passing by value instead: `Foo`
error: this argument (N byte) is passed by reference, but would be more efficient if passed by value (limit: N byte)
--> $DIR/trivially_copy_pass_by_ref.rs:72:34
--> $DIR/trivially_copy_pass_by_ref.rs:74:34
|
LL | fn bad2(x: &u32, y: &Foo, z: &Baz) {}
| ^^^^ help: consider passing by value instead: `Baz`
error: this argument (N byte) is passed by reference, but would be more efficient if passed by value (limit: N byte)
--> $DIR/trivially_copy_pass_by_ref.rs:76:34
--> $DIR/trivially_copy_pass_by_ref.rs:78:34
|
LL | fn trait_method(&self, _foo: &Foo);
| ^^^^ help: consider passing by value instead: `Foo`
error: this argument (N byte) is passed by reference, but would be more efficient if passed by value (limit: N byte)
--> $DIR/trivially_copy_pass_by_ref.rs:108:21
--> $DIR/trivially_copy_pass_by_ref.rs:110:21
|
LL | fn foo_never(x: &i32) {
| ^^^^ help: consider passing by value instead: `i32`
error: this argument (N byte) is passed by reference, but would be more efficient if passed by value (limit: N byte)
--> $DIR/trivially_copy_pass_by_ref.rs:113:15
--> $DIR/trivially_copy_pass_by_ref.rs:115:15
|
LL | fn foo(x: &i32) {
| ^^^^ help: consider passing by value instead: `i32`
error: aborting due to 16 previous errors
error: aborting due to 17 previous errors