Specify desirable namespace when calling resolve

That way, we are able to get rid of a number of unreachable statements

5 files changed, 76 insertions, 56 deletions

diff --git a/crates/ra_ide_api/src/completion/complete_macro_in_item_position.rs b/crates/ra_ide_api/src/completion/complete_macro_in_item_position.rs
index 6fcef4a72..0cbe4abf7 100644
--- a/crates/ra_ide_api/src/completion/complete_macro_in_item_position.rs
+++ b/crates/ra_ide_api/src/completion/complete_macro_in_item_position.rs
@@ -3,11 +3,11 @@ use crate::completion::{CompletionContext, Completions};
 pub(super) fn complete_macro_in_item_position(acc: &mut Completions, ctx: &CompletionContext) {
     // Show only macros in top level.
     if ctx.is_new_item {
-        for (name, res) in ctx.analyzer.all_names(ctx.db) {
-            if res.get_macros().is_some() {
-                acc.add_resolution(ctx, name.to_string(), &res.only_macros());
+        ctx.analyzer.process_all_names(ctx.db, &mut |name, res| {
+            if let hir::ScopeDef::MacroDef(mac) = res {
+                acc.add_macro(ctx, Some(name.to_string()), mac);
             }
-        }
+        })
     }
 }
 
diff --git a/crates/ra_ide_api/src/completion/complete_path.rs b/crates/ra_ide_api/src/completion/complete_path.rs
index 4d3414f33..5ee2864dc 100644
--- a/crates/ra_ide_api/src/completion/complete_path.rs
+++ b/crates/ra_ide_api/src/completion/complete_path.rs
@@ -1,4 +1,4 @@
-use hir::{Adt, Either, Resolution};
+use hir::{Adt, Either, PathResolution};
 use ra_syntax::AstNode;
 use test_utils::tested_by;
 
@@ -9,15 +9,15 @@ pub(super) fn complete_path(acc: &mut Completions, ctx: &CompletionContext) {
         Some(path) => path.clone(),
         _ => return,
     };
-    let def = match ctx.analyzer.resolve_hir_path(ctx.db, &path).take_types() {
-        Some(Resolution::Def(def)) => def,
+    let def = match dbg!(ctx.analyzer.resolve_hir_path(ctx.db, &path)) {
+        Some(PathResolution::Def(def)) => def,
         _ => return,
     };
     match def {
         hir::ModuleDef::Module(module) => {
             let module_scope = module.scope(ctx.db);
             for (name, res) in module_scope.entries() {
-                if let Some(hir::ModuleDef::BuiltinType(..)) = res.def.as_ref().take_types() {
+                if let Some(hir::ModuleDef::BuiltinType(..)) = res.def.take_types() {
                     if ctx.use_item_syntax.is_some() {
                         tested_by!(dont_complete_primitive_in_use);
                         continue;
@@ -34,7 +34,7 @@ pub(super) fn complete_path(acc: &mut Completions, ctx: &CompletionContext) {
                         }
                     }
                 }
-                acc.add_resolution(ctx, name.to_string(), &res.def.map(hir::Resolution::Def));
+                acc.add_resolution(ctx, name.to_string(), &res.def.into());
             }
         }
         hir::ModuleDef::Adt(_) | hir::ModuleDef::TypeAlias(_) => {
diff --git a/crates/ra_ide_api/src/completion/complete_pattern.rs b/crates/ra_ide_api/src/completion/complete_pattern.rs
index fb7f9feb8..c17b5b7ee 100644
--- a/crates/ra_ide_api/src/completion/complete_pattern.rs
+++ b/crates/ra_ide_api/src/completion/complete_pattern.rs
@@ -7,22 +7,20 @@ pub(super) fn complete_pattern(acc: &mut Completions, ctx: &CompletionContext) {
     }
     // FIXME: ideally, we should look at the type we are matching against and
     // suggest variants + auto-imports
-    let names = ctx.analyzer.all_names(ctx.db);
-    for (name, res) in names.into_iter() {
-        let r = res.as_ref();
-        let def = match r.take_types().or_else(|| r.take_values()) {
-            Some(hir::Resolution::Def(def)) => def,
-            _ => continue,
+    ctx.analyzer.process_all_names(ctx.db, &mut |name, res| {
+        let def = match &res {
+            hir::ScopeDef::ModuleDef(def) => def,
+            _ => return,
         };
         match def {
             hir::ModuleDef::Adt(hir::Adt::Enum(..))
             | hir::ModuleDef::EnumVariant(..)
             | hir::ModuleDef::Const(..)
             | hir::ModuleDef::Module(..) => (),
-            _ => continue,
+            _ => return,
         }
         acc.add_resolution(ctx, name.to_string(), &res)
-    }
+    });
 }
 
 #[cfg(test)]
diff --git a/crates/ra_ide_api/src/completion/complete_scope.rs b/crates/ra_ide_api/src/completion/complete_scope.rs
index 2ea22876f..c1f48b026 100644
--- a/crates/ra_ide_api/src/completion/complete_scope.rs
+++ b/crates/ra_ide_api/src/completion/complete_scope.rs
@@ -10,8 +10,9 @@ pub(super) fn complete_scope(acc: &mut Completions, ctx: &CompletionContext) {
         return;
     }
 
-    let names = ctx.analyzer.all_names(ctx.db);
-    names.into_iter().for_each(|(name, res)| acc.add_resolution(ctx, name.to_string(), &res));
+    ctx.analyzer.process_all_names(ctx.db, &mut |name, res| {
+        acc.add_resolution(ctx, name.to_string(), &res)
+    });
 
     // auto-import
     // We fetch ident from the original file, because we need to pre-filter auto-imports
diff --git a/crates/ra_ide_api/src/completion/presentation.rs b/crates/ra_ide_api/src/completion/presentation.rs
index 95bbd34b7..31b887492 100644
--- a/crates/ra_ide_api/src/completion/presentation.rs
+++ b/crates/ra_ide_api/src/completion/presentation.rs
@@ -1,5 +1,5 @@
-//! This modules takes care of rendering various defenitions as completion items.
-use hir::{Docs, HasSource, HirDisplay, PerNs, Resolution, Ty, TypeWalk};
+//! This modules takes care of rendering various definitions as completion items.
+use hir::{Docs, HasSource, HirDisplay, ScopeDef, Ty, TypeWalk};
 use join_to_string::join;
 use ra_syntax::ast::NameOwner;
 use test_utils::tested_by;
@@ -39,61 +39,77 @@ impl Completions {
         &mut self,
         ctx: &CompletionContext,
         local_name: String,
-        resolution: &PerNs<Resolution>,
+        resolution: &ScopeDef,
     ) {
         use hir::ModuleDef::*;
 
-        if let Some(macro_) = resolution.get_macros() {
-            self.add_macro(ctx, Some(local_name.clone()), macro_);
-        }
+        // if let Some(macro_) = resolution.get_macros() {
+        //     self.add_macro(ctx, Some(local_name.clone()), macro_);
+        // }
 
-        let def = resolution.as_ref().take_types().or_else(|| resolution.as_ref().take_values());
-        let def = match def {
-            // Only insert once if it is just a macro name
-            None if resolution.get_macros().is_some() => return,
-            None => {
-                self.add(CompletionItem::new(
-                    CompletionKind::Reference,
-                    ctx.source_range(),
-                    local_name,
-                ));
-                return;
-            }
-            Some(it) => it,
-        };
+        // let def = resolution.as_ref().take_types().or_else(|| resolution.as_ref().take_values());
+        // let def = match def {
+        //     // Only insert once if it is just a macro name
+        //     None if resolution.get_macros().is_some() => return,
+        //     None => {
+        //         self.add(CompletionItem::new(
+        //             CompletionKind::Reference,
+        //             ctx.source_range(),
+        //             local_name,
+        //         ));
+        //         return;
+        //     }
+        //     Some(it) => it,
+        // };
         let mut completion_kind = CompletionKind::Reference;
-        let (kind, docs) = match def {
-            Resolution::Def(Module(it)) => (CompletionItemKind::Module, it.docs(ctx.db)),
-            Resolution::Def(Function(func)) => {
+        let (kind, docs) = match resolution {
+            ScopeDef::ModuleDef(Module(it)) => (CompletionItemKind::Module, it.docs(ctx.db)),
+            ScopeDef::ModuleDef(Function(func)) => {
                 return self.add_function_with_name(ctx, Some(local_name), *func);
             }
-            Resolution::Def(Adt(hir::Adt::Struct(it))) => {
+            ScopeDef::ModuleDef(Adt(hir::Adt::Struct(it))) => {
                 (CompletionItemKind::Struct, it.docs(ctx.db))
             }
-            Resolution::Def(Adt(hir::Adt::Union(it))) => {
+            ScopeDef::ModuleDef(Adt(hir::Adt::Union(it))) => {
                 (CompletionItemKind::Struct, it.docs(ctx.db))
             }
-            Resolution::Def(Adt(hir::Adt::Enum(it))) => (CompletionItemKind::Enum, it.docs(ctx.db)),
-            Resolution::Def(EnumVariant(it)) => (CompletionItemKind::EnumVariant, it.docs(ctx.db)),
-            Resolution::Def(Const(it)) => (CompletionItemKind::Const, it.docs(ctx.db)),
-            Resolution::Def(Static(it)) => (CompletionItemKind::Static, it.docs(ctx.db)),
-            Resolution::Def(Trait(it)) => (CompletionItemKind::Trait, it.docs(ctx.db)),
-            Resolution::Def(TypeAlias(it)) => (CompletionItemKind::TypeAlias, it.docs(ctx.db)),
-            Resolution::Def(BuiltinType(..)) => {
+            ScopeDef::ModuleDef(Adt(hir::Adt::Enum(it))) => {
+                (CompletionItemKind::Enum, it.docs(ctx.db))
+            }
+            ScopeDef::ModuleDef(EnumVariant(it)) => {
+                (CompletionItemKind::EnumVariant, it.docs(ctx.db))
+            }
+            ScopeDef::ModuleDef(Const(it)) => (CompletionItemKind::Const, it.docs(ctx.db)),
+            ScopeDef::ModuleDef(Static(it)) => (CompletionItemKind::Static, it.docs(ctx.db)),
+            ScopeDef::ModuleDef(Trait(it)) => (CompletionItemKind::Trait, it.docs(ctx.db)),
+            ScopeDef::ModuleDef(TypeAlias(it)) => (CompletionItemKind::TypeAlias, it.docs(ctx.db)),
+            ScopeDef::ModuleDef(BuiltinType(..)) => {
                 completion_kind = CompletionKind::BuiltinType;
                 (CompletionItemKind::BuiltinType, None)
             }
-            Resolution::GenericParam(..) => (CompletionItemKind::TypeParam, None),
-            Resolution::LocalBinding(..) => (CompletionItemKind::Binding, None),
-            Resolution::SelfType(..) => (
+            ScopeDef::GenericParam(..) => (CompletionItemKind::TypeParam, None),
+            ScopeDef::LocalBinding(..) => (CompletionItemKind::Binding, None),
+            ScopeDef::SelfType(..) => (
                 CompletionItemKind::TypeParam, // (does this need its own kind?)
                 None,
             ),
+            ScopeDef::MacroDef(mac) => {
+                self.add_macro(ctx, Some(local_name.clone()), *mac);
+                return;
+            }
+            ScopeDef::Unknown => {
+                self.add(CompletionItem::new(
+                    CompletionKind::Reference,
+                    ctx.source_range(),
+                    local_name,
+                ));
+                return;
+            }
         };
 
         let mut completion_item =
             CompletionItem::new(completion_kind, ctx.source_range(), local_name);
-        if let Resolution::LocalBinding(pat_id) = def {
+        if let ScopeDef::LocalBinding(pat_id) = resolution {
             let ty = ctx
                 .analyzer
                 .type_of_pat_by_id(ctx.db, pat_id.clone())
@@ -108,7 +124,12 @@ impl Completions {
         self.add_function_with_name(ctx, None, func)
     }
 
-    fn add_macro(&mut self, ctx: &CompletionContext, name: Option<String>, macro_: hir::MacroDef) {
+    pub(crate) fn add_macro(
+        &mut self,
+        ctx: &CompletionContext,
+        name: Option<String>,
+        macro_: hir::MacroDef,
+    ) {
         let ast_node = macro_.source(ctx.db).ast;
         if let Some(name) = name {
             let detail = macro_label(&ast_node);