use rustc_span::symbol::sym;
declare_clippy_lint! {
- /// **What it does:** Checks slow zero-filled vector initialization
+ /// ### What it does
+ /// Checks slow zero-filled vector initialization
///
- /// **Why is this bad?** These structures are non-idiomatic and less efficient than simply using
+ /// ### Why is this bad?
+ /// These structures are non-idiomatic and less efficient than simply using
/// `vec![0; len]`.
///
- /// **Known problems:** None.
- ///
- /// **Example:**
+ /// ### Example
/// ```rust
/// # use core::iter::repeat;
/// # let len = 4;
if let ExprKind::Call(func, [arg]) = expr.kind;
if let ExprKind::Path(QPath::TypeRelative(ty, name)) = func.kind;
if name.ident.as_str() == "with_capacity";
- if is_type_diagnostic_item(cx, cx.typeck_results().node_type(ty.hir_id), sym::vec_type);
+ if is_type_diagnostic_item(cx, cx.typeck_results().node_type(ty.hir_id), sym::Vec);
then {
Some(arg)
} else {
) {
match initialization {
InitializationType::Extend(e) | InitializationType::Resize(e) => {
- Self::emit_lint(cx, e, vec_alloc, "slow zero-filling initialization")
+ Self::emit_lint(cx, e, vec_alloc, "slow zero-filling initialization");
},
};
}
fn visit_block(&mut self, block: &'tcx Block<'_>) {
if self.initialization_found {
if let Some(s) = block.stmts.get(0) {
- self.visit_stmt(s)
+ self.visit_stmt(s);
}
self.initialization_found = false;