-use crate::utils::span_lint_and_then;
+use clippy_utils::diagnostics::span_lint_and_then;
+use clippy_utils::{match_def_path, paths};
use if_chain::if_chain;
+use rustc_ast::LitKind;
use rustc_errors::Applicability;
+use rustc_hir as hir;
use rustc_hir::{Expr, ExprKind};
use rustc_lint::{LateContext, LateLintPass};
use rustc_session::{declare_lint_pass, declare_tool_lint};
use rustc_span::source_map::Spanned;
-use crate::utils::{match_def_path, paths};
-use rustc_ast::LitKind;
-use rustc_hir as hir;
-
declare_clippy_lint! {
- /// **What it does:** Finds occurrences of `Vec::resize(0, an_int)`
- ///
- /// **Why is this bad?** This is probably an argument inversion mistake.
+ /// ### What it does
+ /// Finds occurrences of `Vec::resize(0, an_int)`
///
- /// **Known problems:** None.
+ /// ### Why is this bad?
+ /// This is probably an argument inversion mistake.
///
- /// **Example:**
+ /// ### Example
/// ```rust
/// vec!(1, 2, 3, 4, 5).resize(0, 5)
/// ```
+ #[clippy::version = "1.46.0"]
pub VEC_RESIZE_TO_ZERO,
correctness,
"emptying a vector with `resize(0, an_int)` instead of `clear()` is probably an argument inversion mistake"
impl<'tcx> LateLintPass<'tcx> for VecResizeToZero {
fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
if_chain! {
- if let hir::ExprKind::MethodCall(path_segment, _, ref args, _) = expr.kind;
+ if let hir::ExprKind::MethodCall(path_segment, args, _) = expr.kind;
if let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id);
if match_def_path(cx, method_def_id, &paths::VEC_RESIZE) && args.len() == 3;
if let ExprKind::Lit(Spanned { node: LitKind::Int(0, _), .. }) = args[1].kind;