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https://github.com/rust-lang/rust-clippy
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Ignore lifetimes from differing contexts in needless_lifetimes
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3 changed files with 28 additions and 0 deletions
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@ -144,6 +144,10 @@ fn check_fn_inner<'tcx>(
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.filter(|param| matches!(param.kind, GenericParamKind::Type { .. }));
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for typ in types {
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if !typ.span.eq_ctxt(span) {
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return;
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}
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for pred in generics.bounds_for_param(typ.def_id) {
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if pred.origin == PredicateOrigin::WhereClause {
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// has_where_lifetimes checked that this predicate contains no lifetime.
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@ -181,6 +185,10 @@ fn check_fn_inner<'tcx>(
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}
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if let Some((elidable_lts, usages)) = could_use_elision(cx, sig.decl, body, trait_sig, generics.params) {
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if usages.iter().any(|usage| !usage.ident.span.eq_ctxt(span)) {
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return;
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}
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let lts = elidable_lts
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.iter()
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// In principle, the result of the call to `Node::ident` could be `unwrap`ped, as `DefId` should refer to a
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@ -516,6 +516,16 @@ mod in_macro {
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// no lint on external macro
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macro_rules::needless_lifetime!();
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macro_rules! expanded_lifetime {
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($l:lifetime) => {
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fn f<$l>(arg: &$l str) -> &$l str {
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arg
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}
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}
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}
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expanded_lifetime!('a);
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}
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mod issue5787 {
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@ -516,6 +516,16 @@ mod in_macro {
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// no lint on external macro
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macro_rules::needless_lifetime!();
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macro_rules! expanded_lifetime {
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($l:lifetime) => {
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fn f<$l>(arg: &$l str) -> &$l str {
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arg
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}
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}
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}
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expanded_lifetime!('a);
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}
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mod issue5787 {
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