diff --git a/clippy_lints/src/methods/mod.rs b/clippy_lints/src/methods/mod.rs index 16a83604c21eb..d8595ea9004ca 100644 --- a/clippy_lints/src/methods/mod.rs +++ b/clippy_lints/src/methods/mod.rs @@ -20,11 +20,11 @@ use syntax::symbol::LocalInternedString; use crate::utils::paths; use crate::utils::sugg; use crate::utils::{ - get_arg_name, get_parent_expr, get_trait_def_id, has_iter_method, implements_trait, in_macro, is_copy, is_expn_of, - is_self, is_self_ty, iter_input_pats, last_path_segment, match_path, match_qpath, match_trait_method, match_type, - match_var, method_calls, method_chain_args, remove_blocks, return_ty, same_tys, single_segment_path, snippet, - snippet_with_applicability, snippet_with_macro_callsite, span_lint, span_lint_and_sugg, span_lint_and_then, - span_note_and_lint, walk_ptrs_ty, walk_ptrs_ty_depth, SpanlessEq, + get_arg_name, get_parent_expr, get_trait_def_id, has_iter_method, implements_trait, in_macro, is_copy, + is_ctor_function, is_expn_of, is_self, is_self_ty, iter_input_pats, last_path_segment, match_path, match_qpath, + match_trait_method, match_type, match_var, method_calls, method_chain_args, remove_blocks, return_ty, same_tys, + single_segment_path, snippet, snippet_with_applicability, snippet_with_macro_callsite, span_lint, + span_lint_and_sugg, span_lint_and_then, span_note_and_lint, walk_ptrs_ty, walk_ptrs_ty_depth, SpanlessEq, }; declare_clippy_lint! { @@ -1072,6 +1072,11 @@ fn lint_or_fun_call(cx: &LateContext<'_, '_>, expr: &hir::Expr, method_span: Spa return; } + // ignore enum and struct constructors + if is_ctor_function(cx, &arg) { + return; + } + // don't lint for constant values let owner_def = cx.tcx.hir().get_parent_did_by_hir_id(arg.hir_id); let promotable = cx.tcx.rvalue_promotable_map(owner_def).contains(&arg.hir_id.local_id); diff --git a/clippy_lints/src/utils/mod.rs b/clippy_lints/src/utils/mod.rs index 31f6658b4e8ba..e95acd343bf4b 100644 --- a/clippy_lints/src/utils/mod.rs +++ b/clippy_lints/src/utils/mod.rs @@ -742,6 +742,19 @@ pub fn is_copy<'a, 'tcx>(cx: &LateContext<'a, 'tcx>, ty: Ty<'tcx>) -> bool { ty.is_copy_modulo_regions(cx.tcx.global_tcx(), cx.param_env, DUMMY_SP) } +/// Checks if an expression is constructing a tuple-like enum variant or struct +pub fn is_ctor_function(cx: &LateContext<'_, '_>, expr: &Expr) -> bool { + if let ExprKind::Call(ref fun, _) = expr.node { + if let ExprKind::Path(ref qp) = fun.node { + return matches!( + cx.tables.qpath_def(qp, fun.hir_id), + def::Def::Variant(..) | def::Def::Ctor(..) + ); + } + } + false +} + /// Returns `true` if a pattern is refutable. pub fn is_refutable(cx: &LateContext<'_, '_>, pat: &Pat) -> bool { fn is_enum_variant(cx: &LateContext<'_, '_>, qpath: &QPath, id: HirId) -> bool { diff --git a/tests/ui/methods.rs b/tests/ui/methods.rs index 3a8aedcd65980..395271b37ebe6 100644 --- a/tests/ui/methods.rs +++ b/tests/ui/methods.rs @@ -268,3 +268,21 @@ fn main() { let opt = Some(0); let _ = opt.unwrap(); } + +struct Foo(u8); +#[rustfmt::skip] +fn test_or_with_ctors() { + let opt = Some(1); + let opt_opt = Some(Some(1)); + // we also test for const promotion, this makes sure we don't hit that + let two = 2; + + let _ = opt_opt.unwrap_or(Some(2)); + let _ = opt_opt.unwrap_or(Some(two)); + let _ = opt.ok_or(Some(2)); + let _ = opt.ok_or(Some(two)); + let _ = opt.ok_or(Foo(2)); + let _ = opt.ok_or(Foo(two)); + let _ = opt.or(Some(2)); + let _ = opt.or(Some(two)); +}