From 79cb0a0dab5fd8e3e84cf4a3b927ec29d2b6e65c Mon Sep 17 00:00:00 2001
From: Florian Diebold <flodiebold@gmail.com>
Date: Thu, 31 Oct 2019 21:21:48 +0100
Subject: Complete trait assoc items

---
 crates/ra_ide_api/src/completion/complete_dot.rs  | 22 ++++++++-----
 crates/ra_ide_api/src/completion/complete_path.rs | 38 ++++++++++++++++++++---
 2 files changed, 48 insertions(+), 12 deletions(-)

(limited to 'crates/ra_ide_api/src/completion')

diff --git a/crates/ra_ide_api/src/completion/complete_dot.rs b/crates/ra_ide_api/src/completion/complete_dot.rs
index 7135f481d..fe32e7366 100644
--- a/crates/ra_ide_api/src/completion/complete_dot.rs
+++ b/crates/ra_ide_api/src/completion/complete_dot.rs
@@ -58,15 +58,21 @@ fn complete_fields(acc: &mut Completions, ctx: &CompletionContext, receiver: Ty)
 
 fn complete_methods(acc: &mut Completions, ctx: &CompletionContext, receiver: Ty) {
     let mut seen_methods = FxHashSet::default();
-    ctx.analyzer.iterate_method_candidates(ctx.db, receiver, None, |_ty, item| {
-        if let hir::AssocItem::Function(func) = item {
-            let data = func.data(ctx.db);
-            if data.has_self_param() && seen_methods.insert(data.name().clone()) {
-                acc.add_function(ctx, func);
+    ctx.analyzer.iterate_method_candidates(
+        ctx.db,
+        receiver,
+        None,
+        hir::LookupMode::MethodCall,
+        |_ty, item| {
+            if let hir::AssocItem::Function(func) = item {
+                let data = func.data(ctx.db);
+                if data.has_self_param() && seen_methods.insert(data.name().clone()) {
+                    acc.add_function(ctx, func);
+                }
             }
-        }
-        None::<()>
-    });
+            None::<()>
+        },
+    );
 }
 
 #[cfg(test)]
diff --git a/crates/ra_ide_api/src/completion/complete_path.rs b/crates/ra_ide_api/src/completion/complete_path.rs
index b471787eb..940858342 100644
--- a/crates/ra_ide_api/src/completion/complete_path.rs
+++ b/crates/ra_ide_api/src/completion/complete_path.rs
@@ -50,9 +50,12 @@ pub(super) fn complete_path(acc: &mut Completions, ctx: &CompletionContext) {
                 hir::ModuleDef::TypeAlias(a) => a.ty(ctx.db),
                 _ => unreachable!(),
             };
-            let krate = ctx.module.map(|m| m.krate());
-            if let Some(krate) = krate {
-                ty.iterate_impl_items(ctx.db, krate, |item| {
+            ctx.analyzer.iterate_method_candidates(
+                ctx.db,
+                ty.clone(),
+                None,
+                hir::LookupMode::Path,
+                |_ty, item| {
                     match item {
                         hir::AssocItem::Function(func) => {
                             let data = func.data(ctx.db);
@@ -64,6 +67,18 @@ pub(super) fn complete_path(acc: &mut Completions, ctx: &CompletionContext) {
                         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 {
+                ty.iterate_impl_items(ctx.db, krate, |item| {
+                    match item {
+                        hir::AssocItem::Function(_) | hir::AssocItem::Const(_) => {}
+                        hir::AssocItem::TypeAlias(ty) => acc.add_type_alias(ctx, ty),
+                    }
+                    None::<()>
                 });
             }
         }
@@ -593,7 +608,22 @@ mod tests {
                 fn foo() { let _ = S::<|> }
                 "
             ),
-            @"[]"
+            @r###"
+        [
+            CompletionItem {
+                label: "m()",
+                source_range: [99; 99),
+                delete: [99; 99),
+                insert: "m()$0",
+                kind: Function,
+                lookup: "m",
+                detail: "fn m()",
+                documentation: Documentation(
+                    "A trait method",
+                ),
+            },
+        ]
+        "###
         );
     }
 
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