use clippy_utils::diagnostics::span_lint_and_sugg;
+use clippy_utils::get_parent_expr;
use clippy_utils::source::snippet_with_context;
use clippy_utils::ty::is_type_lang_item;
-use clippy_utils::{get_parent_expr, in_macro};
use if_chain::if_chain;
use rustc_errors::Applicability;
use rustc_hir::{BorrowKind, Expr, ExprKind, LangItem, Mutability};
use rustc_session::{declare_lint_pass, declare_tool_lint};
declare_clippy_lint! {
- /// **What it does:** Checks for redundant slicing expressions which use the full range, and
+ /// ### What it does
+ /// Checks for redundant slicing expressions which use the full range, and
/// do not change the type.
///
- /// **Why is this bad?** It unnecessarily adds complexity to the expression.
+ /// ### Why is this bad?
+ /// It unnecessarily adds complexity to the expression.
///
- /// **Known problems:** If the type being sliced has an implementation of `Index<RangeFull>`
+ /// ### Known problems
+ /// If the type being sliced has an implementation of `Index<RangeFull>`
/// that actually changes anything then it can't be removed. However, this would be surprising
/// to people reading the code and should have a note with it.
///
- /// **Example:**
- ///
+ /// ### Example
/// ```ignore
/// fn get_slice(x: &[u32]) -> &[u32] {
/// &x[..]
impl LateLintPass<'_> for RedundantSlicing {
fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
- if in_macro(expr.span) {
+ if expr.span.from_expansion() {
return;
}