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Use more slice patterns inside the compiler

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This commit is contained in:
León Orell Valerian Liehr
2024-08-07 12:41:49 +02:00
parent 60d146580c
commit c4c518d2d4
40 changed files with 191 additions and 221 deletions
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20
compiler/rustc_resolve/src/late.rs
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@@ -445,8 +445,8 @@ impl<'a> PathSource<'a> {
Some(ExprKind::Call(call_expr, _)) => match &call_expr.kind {
// the case of `::some_crate()`
ExprKind::Path(_, path)
if path.segments.len() == 2
&& path.segments[0].ident.name == kw::PathRoot =>
if let [segment, _] = path.segments.as_slice()
&& segment.ident.name == kw::PathRoot =>
{
"external crate"
}
@@ -2395,15 +2395,14 @@ impl<'a: 'ast, 'b, 'ast, 'tcx> LateResolutionVisitor<'a, 'b, 'ast, 'tcx> {
}
fn future_proof_import(&mut self, use_tree: &UseTree) {
let segments = &use_tree.prefix.segments;
if !segments.is_empty() {
let ident = segments[0].ident;
if let [segment, rest @ ..] = use_tree.prefix.segments.as_slice() {
let ident = segment.ident;
if ident.is_path_segment_keyword() || ident.span.is_rust_2015() {
return;
}
let nss = match use_tree.kind {
UseTreeKind::Simple(..) if segments.len() == 1 => &[TypeNS, ValueNS][..],
UseTreeKind::Simple(..) if rest.is_empty() => &[TypeNS, ValueNS][..],
_ => &[TypeNS],
};
let report_error = |this: &Self, ns| {
@@ -3999,16 +3998,15 @@ impl<'a: 'ast, 'b, 'ast, 'tcx> LateResolutionVisitor<'a, 'b, 'ast, 'tcx> {
if this.should_report_errs() {
if candidates.is_empty() {
if path.len() == 2 && prefix_path.len() == 1 {
if path.len() == 2
&& let [segment] = prefix_path
{
// Delay to check whether methond name is an associated function or not
// ```
// let foo = Foo {};
// foo::bar(); // possibly suggest to foo.bar();
//```
err.stash(
prefix_path[0].ident.span,
rustc_errors::StashKey::CallAssocMethod,
);
err.stash(segment.ident.span, rustc_errors::StashKey::CallAssocMethod);
} else {
// When there is no suggested imports, we can just emit the error
// and suggestions immediately. Note that we bypass the usually error