7 files changed, 36 insertions, 37 deletions

diff --git a/crates/ra_ide_api/src/completion/complete_dot.rs b/crates/ra_ide_api/src/completion/complete_dot.rs
index a5f071442..536ba36df 100644
--- a/crates/ra_ide_api/src/completion/complete_dot.rs
+++ b/crates/ra_ide_api/src/completion/complete_dot.rs
@@ -5,10 +5,11 @@ use rustc_hash::FxHashSet;
 
 /// Complete dot accesses, i.e. fields or methods (currently only fields).
 pub(super) fn complete_dot(acc: &mut Completions, ctx: &CompletionContext) {
-    let receiver_ty = match ctx.dot_receiver.and_then(|it| ctx.analyzer.type_of(ctx.db, it)) {
-        Some(it) => it,
-        None => return,
-    };
+    let receiver_ty =
+        match ctx.dot_receiver.as_ref().and_then(|it| ctx.analyzer.type_of(ctx.db, it)) {
+            Some(it) => it,
+            None => return,
+        };
     if !ctx.is_call {
         complete_fields(acc, ctx, receiver_ty.clone());
     }
diff --git a/crates/ra_ide_api/src/completion/complete_fn_param.rs b/crates/ra_ide_api/src/completion/complete_fn_param.rs
index 5a117c485..0887ef1f6 100644
--- a/crates/ra_ide_api/src/completion/complete_fn_param.rs
+++ b/crates/ra_ide_api/src/completion/complete_fn_param.rs
@@ -20,7 +20,7 @@ pub(super) fn complete_fn_param(acc: &mut Completions, ctx: &CompletionContext)
         let _ = visitor_ctx(&mut params)
             .visit::<ast::SourceFile, _>(process)
             .visit::<ast::ItemList, _>(process)
-            .accept(node);
+            .accept(&node);
     }
     params
         .into_iter()
@@ -38,10 +38,7 @@ pub(super) fn complete_fn_param(acc: &mut Completions, ctx: &CompletionContext)
                 .add_to(acc)
         });
 
-    fn process<'a, N: ast::FnDefOwner>(
-        node: &'a N,
-        params: &mut FxHashMap<String, (u32, &'a ast::Param)>,
-    ) {
+    fn process<N: ast::FnDefOwner>(node: N, params: &mut FxHashMap<String, (u32, ast::Param)>) {
         node.functions().filter_map(|it| it.param_list()).flat_map(|it| it.params()).for_each(
             |param| {
                 let text = param.syntax().text().to_string();
diff --git a/crates/ra_ide_api/src/completion/complete_keyword.rs b/crates/ra_ide_api/src/completion/complete_keyword.rs
index 034ed934d..4cf34eff8 100644
--- a/crates/ra_ide_api/src/completion/complete_keyword.rs
+++ b/crates/ra_ide_api/src/completion/complete_keyword.rs
@@ -52,7 +52,7 @@ pub(super) fn complete_expr_keyword(acc: &mut Completions, ctx: &CompletionConte
         return;
     }
 
-    let fn_def = match ctx.function_syntax {
+    let fn_def = match &ctx.function_syntax {
         Some(it) => it,
         None => return,
     };
@@ -65,7 +65,7 @@ pub(super) fn complete_expr_keyword(acc: &mut Completions, ctx: &CompletionConte
         acc.add(keyword(ctx, "else", "else {$0}"));
         acc.add(keyword(ctx, "else if", "else if $0 {}"));
     }
-    if is_in_loop_body(ctx.token) {
+    if is_in_loop_body(&ctx.token) {
         if ctx.can_be_stmt {
             acc.add(keyword(ctx, "continue", "continue;"));
             acc.add(keyword(ctx, "break", "break;"));
@@ -74,19 +74,19 @@ pub(super) fn complete_expr_keyword(acc: &mut Completions, ctx: &CompletionConte
             acc.add(keyword(ctx, "break", "break"));
         }
     }
-    acc.add_all(complete_return(ctx, fn_def, ctx.can_be_stmt));
+    acc.add_all(complete_return(ctx, &fn_def, ctx.can_be_stmt));
 }
 
-fn is_in_loop_body(leaf: SyntaxToken) -> bool {
+fn is_in_loop_body(leaf: &SyntaxToken) -> bool {
     for node in leaf.parent().ancestors() {
         if node.kind() == FN_DEF || node.kind() == LAMBDA_EXPR {
             break;
         }
         let loop_body = visitor()
-            .visit::<ast::ForExpr, _>(LoopBodyOwner::loop_body)
-            .visit::<ast::WhileExpr, _>(LoopBodyOwner::loop_body)
-            .visit::<ast::LoopExpr, _>(LoopBodyOwner::loop_body)
-            .accept(node);
+            .visit::<ast::ForExpr, _>(|it| it.loop_body())
+            .visit::<ast::WhileExpr, _>(|it| it.loop_body())
+            .visit::<ast::LoopExpr, _>(|it| it.loop_body())
+            .accept(&node);
         if let Some(Some(body)) = loop_body {
             if leaf.range().is_subrange(&body.syntax().range()) {
                 return true;
diff --git a/crates/ra_ide_api/src/completion/complete_postfix.rs b/crates/ra_ide_api/src/completion/complete_postfix.rs
index 4f5062214..c75b1c159 100644
--- a/crates/ra_ide_api/src/completion/complete_postfix.rs
+++ b/crates/ra_ide_api/src/completion/complete_postfix.rs
@@ -11,7 +11,8 @@ use ra_text_edit::TextEditBuilder;
 
 fn postfix_snippet(ctx: &CompletionContext, label: &str, detail: &str, snippet: &str) -> Builder {
     let edit = {
-        let receiver_range = ctx.dot_receiver.expect("no receiver available").syntax().range();
+        let receiver_range =
+            ctx.dot_receiver.as_ref().expect("no receiver available").syntax().range();
         let delete_range = TextRange::from_to(receiver_range.start(), ctx.source_range().end());
         let mut builder = TextEditBuilder::default();
         builder.replace(delete_range, snippet.to_string());
@@ -38,9 +39,9 @@ fn is_bool_or_unknown(ty: Option<Ty>) -> bool {
 }
 
 pub(super) fn complete_postfix(acc: &mut Completions, ctx: &CompletionContext) {
-    if let Some(dot_receiver) = ctx.dot_receiver {
+    if let Some(dot_receiver) = &ctx.dot_receiver {
         let receiver_text = dot_receiver.syntax().text().to_string();
-        let receiver_ty = ctx.analyzer.type_of(ctx.db, dot_receiver);
+        let receiver_ty = ctx.analyzer.type_of(ctx.db, &dot_receiver);
         if is_bool_or_unknown(receiver_ty) {
             postfix_snippet(ctx, "if", "if expr {}", &format!("if {} {{$0}}", receiver_text))
                 .add_to(acc);
diff --git a/crates/ra_ide_api/src/completion/complete_scope.rs b/crates/ra_ide_api/src/completion/complete_scope.rs
index 1ba871257..f92034055 100644
--- a/crates/ra_ide_api/src/completion/complete_scope.rs
+++ b/crates/ra_ide_api/src/completion/complete_scope.rs
@@ -20,8 +20,8 @@ pub(super) fn complete_scope(acc: &mut Completions, ctx: &CompletionContext) {
                     let mut builder = TextEditBuilder::default();
                     builder.replace(ctx.source_range(), name.to_string());
                     auto_import::auto_import_text_edit(
-                        ctx.token.parent(),
-                        ctx.token.parent(),
+                        &ctx.token.parent(),
+                        &ctx.token.parent(),
                         &path,
                         &mut builder,
                     );
diff --git a/crates/ra_ide_api/src/completion/complete_struct_literal.rs b/crates/ra_ide_api/src/completion/complete_struct_literal.rs
index b6216f857..9410f740f 100644
--- a/crates/ra_ide_api/src/completion/complete_struct_literal.rs
+++ b/crates/ra_ide_api/src/completion/complete_struct_literal.rs
@@ -4,8 +4,8 @@ use crate::completion::{CompletionContext, Completions};
 
 /// Complete fields in fields literals.
 pub(super) fn complete_struct_literal(acc: &mut Completions, ctx: &CompletionContext) {
-    let (ty, variant) = match ctx.struct_lit_syntax.and_then(|it| {
-        Some((ctx.analyzer.type_of(ctx.db, it.into())?, ctx.analyzer.resolve_variant(it)?))
+    let (ty, variant) = match ctx.struct_lit_syntax.as_ref().and_then(|it| {
+        Some((ctx.analyzer.type_of(ctx.db, &it.clone().into())?, ctx.analyzer.resolve_variant(it)?))
     }) {
         Some(it) => it,
         _ => return,
diff --git a/crates/ra_ide_api/src/completion/completion_context.rs b/crates/ra_ide_api/src/completion/completion_context.rs
index 4aa84751f..b803271ab 100644
--- a/crates/ra_ide_api/src/completion/completion_context.rs
+++ b/crates/ra_ide_api/src/completion/completion_context.rs
@@ -16,11 +16,11 @@ pub(crate) struct CompletionContext<'a> {
     pub(super) db: &'a db::RootDatabase,
     pub(super) analyzer: hir::SourceAnalyzer,
     pub(super) offset: TextUnit,
-    pub(super) token: SyntaxToken<'a>,
+    pub(super) token: SyntaxToken,
     pub(super) module: Option<hir::Module>,
-    pub(super) function_syntax: Option<&'a ast::FnDef>,
-    pub(super) use_item_syntax: Option<&'a ast::UseItem>,
-    pub(super) struct_lit_syntax: Option<&'a ast::StructLit>,
+    pub(super) function_syntax: Option<ast::FnDef>,
+    pub(super) use_item_syntax: Option<ast::UseItem>,
+    pub(super) struct_lit_syntax: Option<ast::StructLit>,
     pub(super) is_param: bool,
     /// If a name-binding or reference to a const in a pattern.
     /// Irrefutable patterns (like let) are excluded.
@@ -35,7 +35,7 @@ pub(crate) struct CompletionContext<'a> {
     /// Something is typed at the "top" level, in module or impl/trait.
     pub(super) is_new_item: bool,
     /// The receiver if this is a field or method access, i.e. writing something.<|>
-    pub(super) dot_receiver: Option<&'a ast::Expr>,
+    pub(super) dot_receiver: Option<ast::Expr>,
     /// If this is a call (method or function) in particular, i.e. the () are already there.
     pub(super) is_call: bool,
 }
@@ -50,7 +50,7 @@ impl<'a> CompletionContext<'a> {
         let token =
             find_token_at_offset(original_parse.tree().syntax(), position.offset).left_biased()?;
         let analyzer =
-            hir::SourceAnalyzer::new(db, position.file_id, token.parent(), Some(position.offset));
+            hir::SourceAnalyzer::new(db, position.file_id, &token.parent(), Some(position.offset));
         let mut ctx = CompletionContext {
             db,
             analyzer,
@@ -109,7 +109,7 @@ impl<'a> CompletionContext<'a> {
             if is_node::<ast::BindPat>(name.syntax()) {
                 let bind_pat = name.syntax().ancestors().find_map(ast::BindPat::cast).unwrap();
                 let parent = bind_pat.syntax().parent();
-                if parent.and_then(ast::MatchArm::cast).is_some()
+                if parent.clone().and_then(ast::MatchArm::cast).is_some()
                     || parent.and_then(ast::Condition::cast).is_some()
                 {
                     self.is_pat_binding = true;
@@ -122,7 +122,7 @@ impl<'a> CompletionContext<'a> {
         }
     }
 
-    fn classify_name_ref(&mut self, original_file: &'a SourceFile, name_ref: &ast::NameRef) {
+    fn classify_name_ref(&mut self, original_file: SourceFile, name_ref: ast::NameRef) {
         let name_range = name_ref.syntax().range();
         if name_ref.syntax().parent().and_then(ast::NamedField::cast).is_some() {
             self.struct_lit_syntax = find_node_at_offset(original_file.syntax(), self.offset);
@@ -153,7 +153,7 @@ impl<'a> CompletionContext<'a> {
             None => return,
         };
 
-        if let Some(segment) = ast::PathSegment::cast(parent) {
+        if let Some(segment) = ast::PathSegment::cast(parent.clone()) {
             let path = segment.parent_path();
             self.is_call = path
                 .syntax()
@@ -162,7 +162,7 @@ impl<'a> CompletionContext<'a> {
                 .and_then(|it| it.syntax().parent().and_then(ast::CallExpr::cast))
                 .is_some();
 
-            if let Some(mut path) = hir::Path::from_ast(path) {
+            if let Some(mut path) = hir::Path::from_ast(path.clone()) {
                 if !path.is_ident() {
                     path.segments.pop().unwrap();
                     self.path_prefix = Some(path);
@@ -179,7 +179,7 @@ impl<'a> CompletionContext<'a> {
                     .syntax()
                     .ancestors()
                     .find_map(|node| {
-                        if let Some(stmt) = ast::ExprStmt::cast(node) {
+                        if let Some(stmt) = ast::ExprStmt::cast(node.clone()) {
                             return Some(stmt.syntax().range() == name_ref.syntax().range());
                         }
                         if let Some(block) = ast::Block::cast(node) {
@@ -203,7 +203,7 @@ impl<'a> CompletionContext<'a> {
                 }
             }
         }
-        if let Some(field_expr) = ast::FieldExpr::cast(parent) {
+        if let Some(field_expr) = ast::FieldExpr::cast(parent.clone()) {
             // The receiver comes before the point of insertion of the fake
             // ident, so it should have the same range in the non-modified file
             self.dot_receiver = field_expr
@@ -222,7 +222,7 @@ impl<'a> CompletionContext<'a> {
     }
 }
 
-fn find_node_with_range<N: AstNode>(syntax: &SyntaxNode, range: TextRange) -> Option<&N> {
+fn find_node_with_range<N: AstNode>(syntax: &SyntaxNode, range: TextRange) -> Option<N> {
     find_covering_element(syntax, range).ancestors().find_map(N::cast)
 }