cargo clippy --fix

crates/cfg/src/cfg_expr.rs

@@ -134,10 +134,10 @@ fn next_cfg_expr<S: Copy>(it: &mut tt::iter::TtIter<'_, S>) -> Option<CfgExpr> {
     };
 
     // Eat comma separator
-    if let Some(TtElement::Leaf(tt::Leaf::Punct(punct))) = it.peek() {
-        if punct.char == ',' {
-            it.next();
-        }
+    if let Some(TtElement::Leaf(tt::Leaf::Punct(punct))) = it.peek()
+        && punct.char == ','
+    {
+        it.next();
     }
     Some(ret)
 }

crates/hir-def/src/attr.rs

@@ -377,10 +377,10 @@ fn parse_repr_tt(tt: &crate::tt::TopSubtree) -> Option<ReprOptions> {
                 let mut align = None;
                 if let Some(TtElement::Subtree(_, mut tt_iter)) = tts.peek() {
                     tts.next();
-                    if let Some(TtElement::Leaf(tt::Leaf::Literal(lit))) = tt_iter.next() {
-                        if let Ok(a) = lit.symbol.as_str().parse() {
-                            align = Align::from_bytes(a).ok();
-                        }
+                    if let Some(TtElement::Leaf(tt::Leaf::Literal(lit))) = tt_iter.next()
+                        && let Ok(a) = lit.symbol.as_str().parse()
+                    {
+                        align = Align::from_bytes(a).ok();
                     }
                 }
                 ReprOptions { align, ..Default::default() }

crates/hir-def/src/expr_store/lower.rs

@@ -1487,13 +1487,13 @@ impl ExprCollector<'_> {
             ast::Expr::UnderscoreExpr(_) => self.alloc_pat_from_expr(Pat::Wild, syntax_ptr),
             ast::Expr::ParenExpr(e) => {
                 // We special-case `(..)` for consistency with patterns.
-                if let Some(ast::Expr::RangeExpr(range)) = e.expr() {
-                    if range.is_range_full() {
-                        return Some(self.alloc_pat_from_expr(
-                            Pat::Tuple { args: Box::default(), ellipsis: Some(0) },
-                            syntax_ptr,
-                        ));
-                    }
+                if let Some(ast::Expr::RangeExpr(range)) = e.expr()
+                    && range.is_range_full()
+                {
+                    return Some(self.alloc_pat_from_expr(
+                        Pat::Tuple { args: Box::default(), ellipsis: Some(0) },
+                        syntax_ptr,
+                    ));
                 }
                 return e.expr().and_then(|expr| self.maybe_collect_expr_as_pat(&expr));
             }
@@ -2569,19 +2569,18 @@ impl ExprCollector<'_> {
                     }
                 }
                 RibKind::MacroDef(macro_id) => {
-                    if let Some((parent_ctx, label_macro_id)) = hygiene_info {
-                        if label_macro_id == **macro_id {
-                            // A macro is allowed to refer to labels from before its declaration.
-                            // Therefore, if we got to the rib of its declaration, give up its hygiene
-                            // and use its parent expansion.
-
-                            hygiene_id =
-                                HygieneId::new(parent_ctx.opaque_and_semitransparent(self.db));
-                            hygiene_info = parent_ctx.outer_expn(self.db).map(|expansion| {
-                                let expansion = self.db.lookup_intern_macro_call(expansion.into());
-                                (parent_ctx.parent(self.db), expansion.def)
-                            });
-                        }
+                    if let Some((parent_ctx, label_macro_id)) = hygiene_info
+                        && label_macro_id == **macro_id
+                    {
+                        // A macro is allowed to refer to labels from before its declaration.
+                        // Therefore, if we got to the rib of its declaration, give up its hygiene
+                        // and use its parent expansion.
+
+                        hygiene_id = HygieneId::new(parent_ctx.opaque_and_semitransparent(self.db));
+                        hygiene_info = parent_ctx.outer_expn(self.db).map(|expansion| {
+                            let expansion = self.db.lookup_intern_macro_call(expansion.into());
+                            (parent_ctx.parent(self.db), expansion.def)
+                        });
                     }
                 }
                 _ => {}

crates/hir-def/src/expr_store/lower/asm.rs

@@ -259,10 +259,10 @@ impl ExprCollector<'_> {
                                     }
                                 };
 
-                                if let Some(operand_idx) = operand_idx {
-                                    if let Some(position_span) = to_span(arg.position_span) {
-                                        mappings.push((position_span, operand_idx));
-                                    }
+                                if let Some(operand_idx) = operand_idx
+                                    && let Some(position_span) = to_span(arg.position_span)
+                                {
+                                    mappings.push((position_span, operand_idx));
                                 }
                             }
                         }

crates/hir-def/src/expr_store/lower/path.rs

@@ -211,16 +211,17 @@ pub(super) fn lower_path(
     // Basically, even in rustc it is quite hacky:
     // https://github.com/rust-lang/rust/blob/614f273e9388ddd7804d5cbc80b8865068a3744e/src/librustc_resolve/macros.rs#L456
     // We follow what it did anyway :)
-    if segments.len() == 1 && kind == PathKind::Plain {
-        if let Some(_macro_call) = path.syntax().parent().and_then(ast::MacroCall::cast) {
-            let syn_ctxt = collector.expander.ctx_for_range(path.segment()?.syntax().text_range());
-            if let Some(macro_call_id) = syn_ctxt.outer_expn(collector.db) {
-                if collector.db.lookup_intern_macro_call(macro_call_id.into()).def.local_inner {
-                    kind = match resolve_crate_root(collector.db, syn_ctxt) {
-                        Some(crate_root) => PathKind::DollarCrate(crate_root),
-                        None => PathKind::Crate,
-                    }
-                }
+    if segments.len() == 1
+        && kind == PathKind::Plain
+        && let Some(_macro_call) = path.syntax().parent().and_then(ast::MacroCall::cast)
+    {
+        let syn_ctxt = collector.expander.ctx_for_range(path.segment()?.syntax().text_range());
+        if let Some(macro_call_id) = syn_ctxt.outer_expn(collector.db)
+            && collector.db.lookup_intern_macro_call(macro_call_id.into()).def.local_inner
+        {
+            kind = match resolve_crate_root(collector.db, syn_ctxt) {
+                Some(crate_root) => PathKind::DollarCrate(crate_root),
+                None => PathKind::Crate,
             }
         }
     }

crates/hir-def/src/expr_store/pretty.rs

@@ -900,14 +900,12 @@ impl Printer<'_> {
                         let field_name = arg.name.display(self.db, edition).to_string();
 
                         let mut same_name = false;
-                        if let Pat::Bind { id, subpat: None } = &self.store[arg.pat] {
-                            if let Binding { name, mode: BindingAnnotation::Unannotated, .. } =
+                        if let Pat::Bind { id, subpat: None } = &self.store[arg.pat]
+                            && let Binding { name, mode: BindingAnnotation::Unannotated, .. } =
                                 &self.store.assert_expr_only().bindings[*id]
-                            {
-                                if name.as_str() == field_name {
-                                    same_name = true;
-                                }
-                            }
+                            && name.as_str() == field_name
+                        {
+                            same_name = true;
                         }
 
                         w!(p, "{}", field_name);

crates/hir-def/src/find_path.rs

@@ -107,11 +107,11 @@ struct FindPathCtx<'db> {
 /// Attempts to find a path to refer to the given `item` visible from the `from` ModuleId
 fn find_path_inner(ctx: &FindPathCtx<'_>, item: ItemInNs, max_len: usize) -> Option<ModPath> {
     // - if the item is a module, jump straight to module search
-    if !ctx.is_std_item {
-        if let ItemInNs::Types(ModuleDefId::ModuleId(module_id)) = item {
-            return find_path_for_module(ctx, &mut FxHashSet::default(), module_id, true, max_len)
-                .map(|choice| choice.path);
-        }
+    if !ctx.is_std_item
+        && let ItemInNs::Types(ModuleDefId::ModuleId(module_id)) = item
+    {
+        return find_path_for_module(ctx, &mut FxHashSet::default(), module_id, true, max_len)
+            .map(|choice| choice.path);
     }
 
     let may_be_in_scope = match ctx.prefix {
@@ -226,15 +226,15 @@ fn find_path_for_module(
     }
 
     // - if the module can be referenced as self, super or crate, do that
-    if let Some(kind) = is_kw_kind_relative_to_from(ctx.from_def_map, module_id, ctx.from) {
-        if ctx.prefix != PrefixKind::ByCrate || kind == PathKind::Crate {
-            return Some(Choice {
-                path: ModPath::from_segments(kind, None),
-                path_text_len: path_kind_len(kind),
-                stability: Stable,
-                prefer_due_to_prelude: false,
-            });
-        }
+    if let Some(kind) = is_kw_kind_relative_to_from(ctx.from_def_map, module_id, ctx.from)
+        && (ctx.prefix != PrefixKind::ByCrate || kind == PathKind::Crate)
+    {
+        return Some(Choice {
+            path: ModPath::from_segments(kind, None),
+            path_text_len: path_kind_len(kind),
+            stability: Stable,
+            prefer_due_to_prelude: false,
+        });
     }
 
     // - if the module is in the prelude, return it by that path
@@ -604,29 +604,29 @@ fn find_local_import_locations(
             &def_map[module.local_id]
         };
 
-        if let Some((name, vis, declared)) = data.scope.name_of(item) {
-            if vis.is_visible_from(db, from) {
-                let is_pub_or_explicit = match vis {
-                    Visibility::Module(_, VisibilityExplicitness::Explicit) => {
-                        cov_mark::hit!(explicit_private_imports);
-                        true
-                    }
-                    Visibility::Module(_, VisibilityExplicitness::Implicit) => {
-                        cov_mark::hit!(discount_private_imports);
-                        false
-                    }
-                    Visibility::PubCrate(_) => true,
-                    Visibility::Public => true,
-                };
-
-                // Ignore private imports unless they are explicit. these could be used if we are
-                // in a submodule of this module, but that's usually not
-                // what the user wants; and if this module can import
-                // the item and we're a submodule of it, so can we.
-                // Also this keeps the cached data smaller.
-                if declared || is_pub_or_explicit {
-                    cb(visited_modules, name, module);
+        if let Some((name, vis, declared)) = data.scope.name_of(item)
+            && vis.is_visible_from(db, from)
+        {
+            let is_pub_or_explicit = match vis {
+                Visibility::Module(_, VisibilityExplicitness::Explicit) => {
+                    cov_mark::hit!(explicit_private_imports);
+                    true
                 }
+                Visibility::Module(_, VisibilityExplicitness::Implicit) => {
+                    cov_mark::hit!(discount_private_imports);
+                    false
+                }
+                Visibility::PubCrate(_) => true,
+                Visibility::Public => true,
+            };
+
+            // Ignore private imports unless they are explicit. these could be used if we are
+            // in a submodule of this module, but that's usually not
+            // what the user wants; and if this module can import
+            // the item and we're a submodule of it, so can we.
+            // Also this keeps the cached data smaller.
+            if declared || is_pub_or_explicit {
+                cb(visited_modules, name, module);
             }
         }
 

crates/hir-def/src/item_scope.rs

@@ -510,12 +510,11 @@ impl ItemScope {
         id: AttrId,
         idx: usize,
     ) {
-        if let Some(derives) = self.derive_macros.get_mut(&adt) {
-            if let Some(DeriveMacroInvocation { derive_call_ids, .. }) =
+        if let Some(derives) = self.derive_macros.get_mut(&adt)
+            && let Some(DeriveMacroInvocation { derive_call_ids, .. }) =
                 derives.iter_mut().find(|&&mut DeriveMacroInvocation { attr_id, .. }| id == attr_id)
-            {
-                derive_call_ids[idx] = Some(call);
-            }
+        {
+            derive_call_ids[idx] = Some(call);
         }
     }
 

crates/hir-def/src/item_tree/lower.rs

@@ -83,12 +83,12 @@ impl<'a> Ctx<'a> {
             .flat_map(|item| self.lower_mod_item(&item))
             .collect();
 
-        if let Some(ast::Expr::MacroExpr(tail_macro)) = stmts.expr() {
-            if let Some(call) = tail_macro.macro_call() {
-                cov_mark::hit!(macro_stmt_with_trailing_macro_expr);
-                if let Some(mod_item) = self.lower_mod_item(&call.into()) {
-                    self.top_level.push(mod_item);
-                }
+        if let Some(ast::Expr::MacroExpr(tail_macro)) = stmts.expr()
+            && let Some(call) = tail_macro.macro_call()
+        {
+            cov_mark::hit!(macro_stmt_with_trailing_macro_expr);
+            if let Some(mod_item) = self.lower_mod_item(&call.into()) {
+                self.top_level.push(mod_item);
             }
         }
 
@@ -112,12 +112,11 @@ impl<'a> Ctx<'a> {
                 _ => None,
             })
             .collect();
-        if let Some(ast::Expr::MacroExpr(expr)) = block.tail_expr() {
-            if let Some(call) = expr.macro_call() {
-                if let Some(mod_item) = self.lower_mod_item(&call.into()) {
-                    self.top_level.push(mod_item);
-                }
-            }
+        if let Some(ast::Expr::MacroExpr(expr)) = block.tail_expr()
+            && let Some(call) = expr.macro_call()
+            && let Some(mod_item) = self.lower_mod_item(&call.into())
+        {
+            self.top_level.push(mod_item);
         }
         self.tree.vis.arena = self.visibilities.into_iter().collect();
         self.tree.top_level = self.top_level.into_boxed_slice();

crates/hir-def/src/lang_item.rs

@@ -218,10 +218,10 @@ pub(crate) fn crate_notable_traits(db: &dyn DefDatabase, krate: Crate) -> Option
 
     for (_, module_data) in crate_def_map.modules() {
         for def in module_data.scope.declarations() {
-            if let ModuleDefId::TraitId(trait_) = def {
-                if db.attrs(trait_.into()).has_doc_notable_trait() {
-                    traits.push(trait_);
-                }
+            if let ModuleDefId::TraitId(trait_) = def
+                && db.attrs(trait_.into()).has_doc_notable_trait()
+            {
+                traits.push(trait_);
             }
         }
     }

crates/hir-def/src/macro_expansion_tests/mod.rs

@@ -221,46 +221,42 @@ pub fn identity_when_valid(_attr: TokenStream, item: TokenStream) -> TokenStream
             _ => None,
         };
 
-        if let Some(src) = src {
-            if let Some(file_id) = src.file_id.macro_file() {
-                if let MacroKind::Derive
-                | MacroKind::DeriveBuiltIn
-                | MacroKind::Attr
-                | MacroKind::AttrBuiltIn = file_id.kind(&db)
-                {
-                    let call = file_id.call_node(&db);
-                    let mut show_spans = false;
-                    let mut show_ctxt = false;
-                    for comment in
-                        call.value.children_with_tokens().filter(|it| it.kind() == COMMENT)
-                    {
-                        show_spans |= comment.to_string().contains("+spans");
-                        show_ctxt |= comment.to_string().contains("+syntaxctxt");
-                    }
-                    let pp = pretty_print_macro_expansion(
-                        src.value,
-                        db.span_map(src.file_id).as_ref(),
-                        show_spans,
-                        show_ctxt,
-                    );
-                    format_to!(expanded_text, "\n{}", pp)
-                }
+        if let Some(src) = src
+            && let Some(file_id) = src.file_id.macro_file()
+            && let MacroKind::Derive
+            | MacroKind::DeriveBuiltIn
+            | MacroKind::Attr
+            | MacroKind::AttrBuiltIn = file_id.kind(&db)
+        {
+            let call = file_id.call_node(&db);
+            let mut show_spans = false;
+            let mut show_ctxt = false;
+            for comment in call.value.children_with_tokens().filter(|it| it.kind() == COMMENT) {
+                show_spans |= comment.to_string().contains("+spans");
+                show_ctxt |= comment.to_string().contains("+syntaxctxt");
             }
+            let pp = pretty_print_macro_expansion(
+                src.value,
+                db.span_map(src.file_id).as_ref(),
+                show_spans,
+                show_ctxt,
+            );
+            format_to!(expanded_text, "\n{}", pp)
         }
     }
 
     for impl_id in def_map[local_id].scope.impls() {
         let src = impl_id.lookup(&db).source(&db);
-        if let Some(macro_file) = src.file_id.macro_file() {
-            if let MacroKind::DeriveBuiltIn | MacroKind::Derive = macro_file.kind(&db) {
-                let pp = pretty_print_macro_expansion(
-                    src.value.syntax().clone(),
-                    db.span_map(macro_file.into()).as_ref(),
-                    false,
-                    false,
-                );
-                format_to!(expanded_text, "\n{}", pp)
-            }
+        if let Some(macro_file) = src.file_id.macro_file()
+            && let MacroKind::DeriveBuiltIn | MacroKind::Derive = macro_file.kind(&db)
+        {
+            let pp = pretty_print_macro_expansion(
+                src.value.syntax().clone(),
+                db.span_map(macro_file.into()).as_ref(),
+                false,
+                false,
+            );
+            format_to!(expanded_text, "\n{}", pp)
         }
     }