show field types in completion

2 files changed, 16 insertions, 9 deletions

diff --git a/crates/ra_ide_api/src/completion/complete_dot.rs b/crates/ra_ide_api/src/completion/complete_dot.rs
index 5d4e60dc5..65bba6dc7 100644
--- a/crates/ra_ide_api/src/completion/complete_dot.rs
+++ b/crates/ra_ide_api/src/completion/complete_dot.rs
@@ -28,13 +28,13 @@ fn complete_fields(acc: &mut Completions, ctx: &CompletionContext, receiver: Ty)
             Ty::Adt { def_id, .. } => {
                 match def_id.resolve(ctx.db)? {
                     Def::Struct(s) => {
-                        let variant_data = s.variant_data(ctx.db)?;
-                        for field in variant_data.fields() {
+                        for field in s.fields(ctx.db)? {
                             CompletionItem::new(
                                 CompletionKind::Reference,
                                 field.name().to_string(),
                             )
                             .kind(CompletionItemKind::Field)
+                            .set_detail(field.ty(ctx.db)?.map(|ty| ty.to_string()))
                             .add_to(acc);
                         }
                     }
@@ -72,7 +72,7 @@ mod tests {
                a.<|>
             }
             ",
-            r#"the_field"#,
+            r#"the_field "u32""#,
         );
     }
 
@@ -80,14 +80,14 @@ mod tests {
     fn test_struct_field_completion_self() {
         check_ref_completion(
             r"
-            struct A { the_field: u32 }
+            struct A { the_field: (u32,) }
             impl A {
                 fn foo(self) {
                     self.<|>
                 }
             }
             ",
-            r#"the_field"#,
+            r#"the_field "(u32,)""#,
         );
     }
 
@@ -95,14 +95,14 @@ mod tests {
     fn test_struct_field_completion_autoderef() {
         check_ref_completion(
             r"
-            struct A { the_field: u32 }
+            struct A { the_field: (u32, i32) }
             impl A {
                 fn foo(&self) {
                     self.<|>
                 }
             }
             ",
-            r#"the_field"#,
+            r#"the_field "(u32, i32)""#,
         );
     }
 
diff --git a/crates/ra_ide_api/src/completion/completion_item.rs b/crates/ra_ide_api/src/completion/completion_item.rs
index d707a84ef..334449fae 100644
--- a/crates/ra_ide_api/src/completion/completion_item.rs
+++ b/crates/ra_ide_api/src/completion/completion_item.rs
@@ -126,8 +126,12 @@ impl Builder {
         self.kind = Some(kind);
         self
     }
-    pub(crate) fn detail(mut self, detail: impl Into<String>) -> Builder {
-        self.detail = Some(detail.into());
+    #[allow(unused)]
+    pub(crate) fn detail(self, detail: impl Into<String>) -> Builder {
+        self.set_detail(Some(detail))
+    }
+    pub(crate) fn set_detail(mut self, detail: Option<impl Into<String>>) -> Builder {
+        self.detail = detail.map(Into::into);
         self
     }
     pub(super) fn from_resolution(
@@ -239,6 +243,9 @@ impl Completions {
                 } else {
                     res.push_str(&c.label);
                 }
+                if let Some(detail) = &c.detail {
+                    res.push_str(&format!(" {:?}", detail));
+                }
                 if let Some(snippet) = &c.snippet {
                     res.push_str(&format!(" {:?}", snippet));
                 }