4 files changed, 38 insertions, 28 deletions

diff --git a/crates/ra_ide/src/completion/complete_dot.rs b/crates/ra_ide/src/completion/complete_dot.rs
index 210a685e4..2ca78c927 100644
--- a/crates/ra_ide/src/completion/complete_dot.rs
+++ b/crates/ra_ide/src/completion/complete_dot.rs
@@ -27,7 +27,7 @@ pub(super) fn complete_dot(acc: &mut Completions, ctx: &CompletionContext) {
     complete_methods(acc, ctx, &receiver_ty);
 
     // Suggest .await syntax for types that implement Future trait
-    if ctx.analyzer.impls_future(ctx.db, receiver_ty) {
+    if receiver_ty.impls_future(ctx.db) {
         CompletionItem::new(CompletionKind::Keyword, ctx.source_range(), "await")
             .detail("expr.await")
             .insert_text("await")
@@ -53,13 +53,16 @@ fn complete_fields(acc: &mut Completions, ctx: &CompletionContext, receiver: &Ty
 }
 
 fn complete_methods(acc: &mut Completions, ctx: &CompletionContext, receiver: &Type) {
-    let mut seen_methods = FxHashSet::default();
-    ctx.analyzer.iterate_method_candidates(ctx.db, receiver, None, |_ty, func| {
-        if func.has_self_param(ctx.db) && seen_methods.insert(func.name(ctx.db)) {
-            acc.add_function(ctx, func);
-        }
-        None::<()>
-    });
+    if let Some(krate) = ctx.module.map(|it| it.krate()) {
+        let mut seen_methods = FxHashSet::default();
+        let traits_in_scope = ctx.analyzer.traits_in_scope(ctx.db);
+        receiver.iterate_method_candidates(ctx.db, krate, &traits_in_scope, None, |_ty, func| {
+            if func.has_self_param(ctx.db) && seen_methods.insert(func.name(ctx.db)) {
+                acc.add_function(ctx, func);
+            }
+            None::<()>
+        });
+    }
 }
 
 #[cfg(test)]
@@ -525,6 +528,7 @@ mod tests {
 
             //- /std/lib.rs
             pub mod future {
+                #[lang = "future_trait"]
                 pub trait Future {}
             }
             "###, CompletionKind::Keyword),
diff --git a/crates/ra_ide/src/completion/complete_path.rs b/crates/ra_ide/src/completion/complete_path.rs
index cc1f7c830..af24e9f48 100644
--- a/crates/ra_ide/src/completion/complete_path.rs
+++ b/crates/ra_ide/src/completion/complete_path.rs
@@ -26,7 +26,7 @@ pub(super) fn complete_path(acc: &mut Completions, ctx: &CompletionContext) {
                     }
                     if let ScopeDef::Unknown = def {
                         if let Some(name_ref) = ctx.name_ref_syntax.as_ref() {
-                            if &name_ref.syntax().text() == name.to_string().as_str() {
+                            if name_ref.syntax().text() == name.to_string().as_str() {
                                 // for `use self::foo<|>`, don't suggest `foo` as a completion
                                 tested_by!(dont_complete_current_use);
                                 continue;
@@ -49,22 +49,24 @@ pub(super) fn complete_path(acc: &mut Completions, ctx: &CompletionContext) {
                 hir::ModuleDef::TypeAlias(a) => a.ty(ctx.db),
                 _ => unreachable!(),
             };
-            ctx.analyzer.iterate_path_candidates(ctx.db, &ty, None, |_ty, item| {
-                match item {
-                    hir::AssocItem::Function(func) => {
-                        if !func.has_self_param(ctx.db) {
-                            acc.add_function(ctx, func);
-                        }
-                    }
-                    hir::AssocItem::Const(ct) => acc.add_const(ctx, ct),
-                    hir::AssocItem::TypeAlias(ty) => acc.add_type_alias(ctx, ty),
-                }
-                None::<()>
-            });
             // Iterate assoc types separately
             // FIXME: complete T::AssocType
             let krate = ctx.module.map(|m| m.krate());
             if let Some(krate) = krate {
+                let traits_in_scope = ctx.analyzer.traits_in_scope(ctx.db);
+                ty.iterate_path_candidates(ctx.db, krate, &traits_in_scope, None, |_ty, item| {
+                    match item {
+                        hir::AssocItem::Function(func) => {
+                            if !func.has_self_param(ctx.db) {
+                                acc.add_function(ctx, func);
+                            }
+                        }
+                        hir::AssocItem::Const(ct) => acc.add_const(ctx, ct),
+                        hir::AssocItem::TypeAlias(ty) => acc.add_type_alias(ctx, ty),
+                    }
+                    None::<()>
+                });
+
                 ty.iterate_impl_items(ctx.db, krate, |item| {
                     match item {
                         hir::AssocItem::Function(_) | hir::AssocItem::Const(_) => {}
diff --git a/crates/ra_ide/src/completion/complete_snippet.rs b/crates/ra_ide/src/completion/complete_snippet.rs
index 1f2988b36..731b4fd82 100644
--- a/crates/ra_ide/src/completion/complete_snippet.rs
+++ b/crates/ra_ide/src/completion/complete_snippet.rs
@@ -36,6 +36,7 @@ fn ${1:feature}() {
     .lookup_by("tfn")
     .add_to(acc);
 
+    snippet(ctx, "macro_rules", "macro_rules! $1 {\n\t($2) => {\n\t\t$0\n\t};\n}").add_to(acc);
     snippet(ctx, "pub(crate)", "pub(crate) $0").add_to(acc);
 }
 
@@ -107,6 +108,13 @@ mod tests {
                 lookup: "tfn",
             },
             CompletionItem {
+                label: "macro_rules",
+                source_range: [78; 78),
+                delete: [78; 78),
+                insert: "macro_rules! $1 {\n\t($2) => {\n\t\t$0\n\t};\n}",
+                kind: Snippet,
+            },
+            CompletionItem {
                 label: "pub(crate)",
                 source_range: [78; 78),
                 delete: [78; 78),
diff --git a/crates/ra_ide/src/completion/completion_context.rs b/crates/ra_ide/src/completion/completion_context.rs
index 48d69f7e5..deaacda6c 100644
--- a/crates/ra_ide/src/completion/completion_context.rs
+++ b/crates/ra_ide/src/completion/completion_context.rs
@@ -52,15 +52,11 @@ impl<'a> CompletionContext<'a> {
         original_parse: &'a Parse<ast::SourceFile>,
         position: FilePosition,
     ) -> Option<CompletionContext<'a>> {
-        let src = hir::ModuleSource::from_position(db, position);
-        let module = hir::Module::from_definition(
-            db,
-            hir::InFile { file_id: position.file_id.into(), value: src },
-        );
+        let mut sb = hir::SourceBinder::new(db);
+        let module = sb.to_module_def(position.file_id);
         let token =
             original_parse.tree().syntax().token_at_offset(position.offset).left_biased()?;
-        let analyzer = hir::SourceAnalyzer::new(
-            db,
+        let analyzer = sb.analyze(
             hir::InFile::new(position.file_id.into(), &token.parent()),
             Some(position.offset),
         );