use clippy_utils::diagnostics::{span_lint, span_lint_and_then};
use clippy_utils::higher::{get_vec_init_kind, VecInitKind};
use clippy_utils::ty::{is_type_diagnostic_item, is_uninit_value_valid_for_ty};
-use clippy_utils::{is_lint_allowed, path_to_local_id, peel_hir_expr_while, SpanlessEq};
+use clippy_utils::{is_integer_literal, is_lint_allowed, path_to_local_id, peel_hir_expr_while, SpanlessEq};
use rustc_hir::{Block, Expr, ExprKind, HirId, PatKind, PathSegment, Stmt, StmtKind};
use rustc_lint::{LateContext, LateLintPass};
use rustc_middle::lint::in_external_macro;
}
});
match expr.kind {
- ExprKind::MethodCall(path, self_expr, [_], _) => {
+ ExprKind::MethodCall(path, self_expr, [arg], _) => {
let self_type = cx.typeck_results().expr_ty(self_expr).peel_refs();
- if is_type_diagnostic_item(cx, self_type, sym::Vec) && path.ident.name.as_str() == "set_len" {
+ if is_type_diagnostic_item(cx, self_type, sym::Vec)
+ && path.ident.name.as_str() == "set_len"
+ && !is_integer_literal(arg, 0)
+ {
Some((self_expr, expr.span))
} else {
None