bjoernager/rust
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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
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GPG key ID: D17A07215F68E713
40 changed files with 191 additions and 221 deletions
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7
compiler/rustc_builtin_macros/src/asm.rs
View file

@ -745,10 +745,9 @@ fn expand_preparsed_asm(
unused_operands.push((args.operands[idx].1, msg));
}
}
match unused_operands.len() {
0 => {}
1 => {
let (sp, msg) = unused_operands.into_iter().next().unwrap();
match unused_operands[..] {
[] => {}
[(sp, msg)] => {
ecx.dcx()
.struct_span_err(sp, msg)
.with_span_label(sp, msg)

8
compiler/rustc_builtin_macros/src/deriving/generic/mod.rs
View file

@ -378,8 +378,8 @@ impl BlockOrExpr {
None => cx.expr_block(cx.block(span, ThinVec::new())),
Some(expr) => expr,
}
} else if self.0.len() == 1
&& let ast::StmtKind::Expr(expr) = &self.0[0].kind
} else if let [stmt] = self.0.as_slice()
&& let ast::StmtKind::Expr(expr) = &stmt.kind
&& self.1.is_none()
{
// There's only a single statement expression. Pull it out.
@ -1273,7 +1273,7 @@ impl<'a> MethodDef<'a> {
}
FieldlessVariantsStrategy::Default => (),
}
} else if variants.len() == 1 {
} else if let [variant] = variants.as_slice() {
// If there is a single variant, we don't need an operation on
// the discriminant(s). Just use the most degenerate result.
return self.call_substructure_method(
@ -1281,7 +1281,7 @@ impl<'a> MethodDef<'a> {
trait_,
type_ident,
nonselflike_args,
&EnumMatching(0, &variants[0], Vec::new()),
&EnumMatching(0, variant, Vec::new()),
);
}
}

8
compiler/rustc_builtin_macros/src/format.rs
View file

@ -180,8 +180,8 @@ fn make_format_args(
Ok((mut err, suggested)) => {
if !suggested {
if let ExprKind::Block(block, None) = &efmt.kind
&& block.stmts.len() == 1
&& let StmtKind::Expr(expr) = &block.stmts[0].kind
&& let [stmt] = block.stmts.as_slice()
&& let StmtKind::Expr(expr) = &stmt.kind
&& let ExprKind::Path(None, path) = &expr.kind
&& path.is_potential_trivial_const_arg()
{
@ -196,8 +196,8 @@ fn make_format_args(
} else {
let sugg_fmt = match args.explicit_args().len() {
0 => "{}".to_string(),
_ => {
format!("{}{{}}", "{} ".repeat(args.explicit_args().len()))
count => {
format!("{}{{}}", "{} ".repeat(count))
}
};
err.span_suggestion(