Mirrors/rust-clippy
2
0
Fork 0
mirror of https://github.com/rust-lang/rust-clippy synced 2024-11-23 21:23:56 +00:00
Code Issues Projects Releases Packages Wiki Activity

Auto merge of #12125 - cocodery:issue12045, r=xFrednet

Browse source 
Fix error warning span for issue12045

fixes [Issue#12045](https://github.com/rust-lang/rust-clippy/issues/12045)

In issue#12045, unexpected warning span occurs on attribute `#[derive(typed_builder::TypedBuilder)]`, actually the warning should underline `_lifetime`.

In the source code we can find that the original intend is to warning on `ident.span`, but in this case, `stmt.span` is unequal with `ident.span`. So, fix the nit here is fine.

Besides, `ident.span` have an accurate range than `stmt.span`.

changelog: [`no_effect_underscore_binding`]: correct warning span
This commit is contained in:
bors 2024-01-19 13:54:06 +00:00
commit 989ce17b55
2 changed files with 11 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
clippy_lints/src/no_effect.rs
View file

@ -1,7 +1,7 @@
use clippy_utils::diagnostics::{span_lint_hir, span_lint_hir_and_then};
use clippy_utils::source::snippet_opt;
use clippy_utils::ty::has_drop;
use clippy_utils::{get_parent_node, is_lint_allowed, peel_blocks};
use clippy_utils::{any_parent_is_automatically_derived, get_parent_node, is_lint_allowed, peel_blocks};
use rustc_errors::Applicability;
use rustc_hir::def::{DefKind, Res};
use rustc_hir::{
@ -150,12 +150,13 @@ fn check_no_effect(cx: &LateContext<'_>, stmt: &Stmt<'_>) -> bool {
&& has_no_effect(cx, init)
&& let PatKind::Binding(_, _, ident, _) = local.pat.kind
&& ident.name.to_ident_string().starts_with('_')
&& !any_parent_is_automatically_derived(cx.tcx, local.hir_id)
{
span_lint_hir(
cx,
NO_EFFECT_UNDERSCORE_BINDING,
init.hir_id,
stmt.span,
ident.span,
"binding to `_` prefixed variable with no side-effect",
);
return true;

16
tests/ui/no_effect.stderr
View file

@ -152,31 +152,31 @@ LL | FooString { s: s };
| ^^^^^^^^^^^^^^^^^^^
error: binding to `_` prefixed variable with no side-effect
--> $DIR/no_effect.rs:175:5
--> $DIR/no_effect.rs:175:9
|
LL | let _unused = 1;
| ^^^^^^^^^^^^^^^^
| ^^^^^^^
|
= note: `-D clippy::no-effect-underscore-binding` implied by `-D warnings`
= help: to override `-D warnings` add `#[allow(clippy::no_effect_underscore_binding)]`
error: binding to `_` prefixed variable with no side-effect
--> $DIR/no_effect.rs:178:5
--> $DIR/no_effect.rs:178:9
|
LL | let _penguin = || println!("Some helpful closure");
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^^^^^^
error: binding to `_` prefixed variable with no side-effect
--> $DIR/no_effect.rs:180:5
--> $DIR/no_effect.rs:180:9
|
LL | let _duck = Struct { field: 0 };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^^^
error: binding to `_` prefixed variable with no side-effect
--> $DIR/no_effect.rs:182:5
--> $DIR/no_effect.rs:182:9
|
LL | let _cat = [2, 4, 6, 8][2];
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
| ^^^^
error: aborting due to 29 previous errors