1 use super::utils::get_hint_if_single_char_arg;
2 use clippy_utils::diagnostics::span_lint_and_sugg;
3 use clippy_utils::source::snippet_with_applicability;
4 use rustc_errors::Applicability;
6 use rustc_lint::LateContext;
8 use super::SINGLE_CHAR_ADD_STR;
10 /// lint for length-1 `str`s as argument for `push_str`
11 pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, args: &[hir::Expr<'_>]) {
12 let mut applicability = Applicability::MachineApplicable;
13 if let Some(extension_string) = get_hint_if_single_char_arg(cx, &args[1], &mut applicability) {
14 let base_string_snippet =
15 snippet_with_applicability(cx, args[0].span.source_callsite(), "..", &mut applicability);
16 let sugg = format!("{}.push({})", base_string_snippet, extension_string);
21 "calling `push_str()` using a single-character string literal",
22 "consider using `push` with a character literal",