| use clippy_utils::last_path_segment; |
| use if_chain::if_chain; |
| use rustc_hir::{GenericArg, GenericArgsParentheses, QPath, TyKind}; |
| use rustc_lint::LateContext; |
| use rustc_span::Span; |
| |
| pub(super) fn match_borrows_parameter(_cx: &LateContext<'_>, qpath: &QPath<'_>) -> Option<Span> { |
| let last = last_path_segment(qpath); |
| if_chain! { |
| if let Some(params) = last.args; |
| if params.parenthesized == GenericArgsParentheses::No; |
| if let Some(ty) = params.args.iter().find_map(|arg| match arg { |
| GenericArg::Type(ty) => Some(ty), |
| _ => None, |
| }); |
| if let TyKind::Ref(..) = ty.kind; |
| then { |
| return Some(ty.span); |
| } |
| } |
| None |
| } |
