diff options
| -rw-r--r-- | src/librustc_lint/builtin.rs | 23 | ||||
| -rw-r--r-- | src/test/ui/lint/lint-shorthand-field.fixed | 70 | ||||
| -rw-r--r-- | src/test/ui/lint/lint-shorthand-field.rs | 18 | ||||
| -rw-r--r-- | src/test/ui/lint/lint-shorthand-field.stderr | 34 | ||||
| -rw-r--r-- | src/test/ui/lint/suggestions.rs | 2 | ||||
| -rw-r--r-- | src/test/ui/lint/suggestions.stderr | 4 |
6 files changed, 129 insertions, 22 deletions
diff --git a/src/librustc_lint/builtin.rs b/src/librustc_lint/builtin.rs index 4cf694631d0..6461263bf51 100644 --- a/src/librustc_lint/builtin.rs +++ b/src/librustc_lint/builtin.rs @@ -174,18 +174,27 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for NonShorthandFieldPatterns { // (Issue #49588) continue; } - if let PatKind::Binding(_, _, ident, None) = fieldpat.pat.kind { + if let PatKind::Binding(binding_annot, _, ident, None) = fieldpat.pat.kind { if cx.tcx.find_field_index(ident, &variant) == Some(cx.tcx.field_index(fieldpat.hir_id, cx.tables)) { let mut err = cx.struct_span_lint(NON_SHORTHAND_FIELD_PATTERNS, fieldpat.span, &format!("the `{}:` in this pattern is redundant", ident)); - let subspan = cx.tcx.sess.source_map().span_through_char(fieldpat.span, - ':'); - err.span_suggestion_short( - subspan, - "remove this", - ident.to_string(), + let binding = match binding_annot { + hir::BindingAnnotation::Unannotated => None, + hir::BindingAnnotation::Mutable => Some("mut"), + hir::BindingAnnotation::Ref => Some("ref"), + hir::BindingAnnotation::RefMut => Some("ref mut"), + }; + let ident = if let Some(binding) = binding { + format!("{} {}", binding, ident) + } else { + ident.to_string() + }; + err.span_suggestion( + fieldpat.span, + "use shorthand field pattern", + ident, Applicability::MachineApplicable ); err.emit(); diff --git a/src/test/ui/lint/lint-shorthand-field.fixed b/src/test/ui/lint/lint-shorthand-field.fixed new file mode 100644 index 00000000000..7cd5717bc5a --- /dev/null +++ b/src/test/ui/lint/lint-shorthand-field.fixed @@ -0,0 +1,70 @@ +// run-rustfix + +#![allow(nonstandard_style, unused_variables, unused_mut)] +#![deny(non_shorthand_field_patterns)] + +struct Foo { + x: isize, + y: isize, +} + +fn main() { + { + let Foo { + x, //~ ERROR the `x:` in this pattern is redundant + ref y, //~ ERROR the `y:` in this pattern is redundant + } = Foo { x: 0, y: 0 }; + + let Foo { + x, + ref y, + } = Foo { x: 0, y: 0 }; + } + + { + const x: isize = 1; + + match (Foo { x: 1, y: 1 }) { + Foo { x: x, ..} => {}, + _ => {}, + } + } + + { + struct Bar { + x: x, + } + + struct x; + + match (Bar { x: x }) { + Bar { x: x } => {}, + } + } + + { + struct Bar { + x: Foo, + } + + enum Foo { x } + + match (Bar { x: Foo::x }) { + Bar { x: Foo::x } => {}, + } + } + + { + struct Baz { + x: isize, + y: isize, + z: isize, + } + + let Baz { + mut x, //~ ERROR the `x:` in this pattern is redundant + ref y, //~ ERROR the `y:` in this pattern is redundant + ref mut z, //~ ERROR the `z:` in this pattern is redundant + } = Baz { x: 0, y: 0, z: 0 }; + } +} diff --git a/src/test/ui/lint/lint-shorthand-field.rs b/src/test/ui/lint/lint-shorthand-field.rs index 5e756d14dc8..22de9c32545 100644 --- a/src/test/ui/lint/lint-shorthand-field.rs +++ b/src/test/ui/lint/lint-shorthand-field.rs @@ -1,4 +1,6 @@ -#![allow(nonstandard_style, unused_variables)] +// run-rustfix + +#![allow(nonstandard_style, unused_variables, unused_mut)] #![deny(non_shorthand_field_patterns)] struct Foo { @@ -51,4 +53,18 @@ fn main() { Bar { x: Foo::x } => {}, } } + + { + struct Baz { + x: isize, + y: isize, + z: isize, + } + + let Baz { + x: mut x, //~ ERROR the `x:` in this pattern is redundant + y: ref y, //~ ERROR the `y:` in this pattern is redundant + z: ref mut z, //~ ERROR the `z:` in this pattern is redundant + } = Baz { x: 0, y: 0, z: 0 }; + } } diff --git a/src/test/ui/lint/lint-shorthand-field.stderr b/src/test/ui/lint/lint-shorthand-field.stderr index 366ab55d7d4..5c9b21ffdc7 100644 --- a/src/test/ui/lint/lint-shorthand-field.stderr +++ b/src/test/ui/lint/lint-shorthand-field.stderr @@ -1,24 +1,38 @@ error: the `x:` in this pattern is redundant - --> $DIR/lint-shorthand-field.rs:12:13 + --> $DIR/lint-shorthand-field.rs:14:13 | LL | x: x, - | --^^ - | | - | help: remove this + | ^^^^ help: use shorthand field pattern: `x` | note: lint level defined here - --> $DIR/lint-shorthand-field.rs:2:9 + --> $DIR/lint-shorthand-field.rs:4:9 | LL | #![deny(non_shorthand_field_patterns)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: the `y:` in this pattern is redundant - --> $DIR/lint-shorthand-field.rs:13:13 + --> $DIR/lint-shorthand-field.rs:15:13 | LL | y: ref y, - | --^^^^^^ - | | - | help: remove this + | ^^^^^^^^ help: use shorthand field pattern: `ref y` -error: aborting due to 2 previous errors +error: the `x:` in this pattern is redundant + --> $DIR/lint-shorthand-field.rs:65:13 + | +LL | x: mut x, + | ^^^^^^^^ help: use shorthand field pattern: `mut x` + +error: the `y:` in this pattern is redundant + --> $DIR/lint-shorthand-field.rs:66:13 + | +LL | y: ref y, + | ^^^^^^^^ help: use shorthand field pattern: `ref y` + +error: the `z:` in this pattern is redundant + --> $DIR/lint-shorthand-field.rs:67:13 + | +LL | z: ref mut z, + | ^^^^^^^^^^^^ help: use shorthand field pattern: `ref mut z` + +error: aborting due to 5 previous errors diff --git a/src/test/ui/lint/suggestions.rs b/src/test/ui/lint/suggestions.rs index aa5518d1a7a..29297d08dca 100644 --- a/src/test/ui/lint/suggestions.rs +++ b/src/test/ui/lint/suggestions.rs @@ -60,7 +60,7 @@ fn main() { match d { Equinox { warp_factor: warp_factor } => {} //~^ WARN this pattern is redundant - //~| HELP remove this + //~| HELP use shorthand field pattern } println!("{} {}", registry_no, b); } diff --git a/src/test/ui/lint/suggestions.stderr b/src/test/ui/lint/suggestions.stderr index 2042ed75537..e42ee0fa640 100644 --- a/src/test/ui/lint/suggestions.stderr +++ b/src/test/ui/lint/suggestions.stderr @@ -77,9 +77,7 @@ warning: the `warp_factor:` in this pattern is redundant --> $DIR/suggestions.rs:61:23 | LL | Equinox { warp_factor: warp_factor } => {} - | ------------^^^^^^^^^^^^ - | | - | help: remove this + | ^^^^^^^^^^^^^^^^^^^^^^^^ help: use shorthand field pattern: `warp_factor` | = note: `#[warn(non_shorthand_field_patterns)]` on by default |