From 55d4b06a53246c144be900877e6ac03237d6f8b4 Mon Sep 17 00:00:00 2001
From: Jeremy Kolb <kjeremy@gmail.com>
Date: Sun, 27 Oct 2019 20:11:02 -0400
Subject: Add disciminant

---
 crates/ra_ide_api/src/call_info.rs                  | 10 ++++------
 crates/ra_ide_api/src/display/function_signature.rs | 14 +++++++++++++-
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/crates/ra_ide_api/src/call_info.rs b/crates/ra_ide_api/src/call_info.rs
index dfd6e69c5..29ae2f552 100644
--- a/crates/ra_ide_api/src/call_info.rs
+++ b/crates/ra_ide_api/src/call_info.rs
@@ -29,8 +29,7 @@ pub(crate) fn call_info(db: &RootDatabase, position: FilePosition) -> Option<Cal
                     (CallInfo::with_fn(db, it), it.data(db).has_self_param())
                 }
                 hir::CallableDef::Struct(it) => (CallInfo::with_struct(db, it), false),
-                //FIXME: handle other callables
-                _ => return None,
+                hir::CallableDef::EnumVariant(_it) => return None,
             }
         }
         FnCallNode::MethodCallExpr(expr) => {
@@ -476,14 +475,13 @@ fn main() {
         let info = call_info(
             r#"
 /// A cool tuple struct
-struct TS(String, i32);
+struct TS(u32, i32);
 fn main() {
-    let s = TS("".into(), <|>);
+    let s = TS(0, <|>);
 }"#,
         );
 
-        //assert_eq!(info.label(), "struct TS(String, i32)");
-        assert_eq!(info.label(), "fn TS(0: {unknown}, 1: i32) -> TS");
+        assert_eq!(info.label(), "struct TS(0: u32, 1: i32) -> TS");
         assert_eq!(info.doc().map(|it| it.into()), Some("A cool tuple struct".to_string()));
         assert_eq!(info.active_parameter, Some(1));
     }
diff --git a/crates/ra_ide_api/src/display/function_signature.rs b/crates/ra_ide_api/src/display/function_signature.rs
index 0697a0727..6555f8619 100644
--- a/crates/ra_ide_api/src/display/function_signature.rs
+++ b/crates/ra_ide_api/src/display/function_signature.rs
@@ -12,9 +12,16 @@ use crate::{
     display::{generic_parameters, where_predicates},
 };
 
+#[derive(Debug)]
+pub enum SigKind {
+    Function,
+    Struct,
+}
+
 /// Contains information about a function signature
 #[derive(Debug)]
 pub struct FunctionSignature {
+    pub kind: SigKind,
     /// Optional visibility
     pub visibility: Option<String>,
     /// Name of the function
@@ -59,6 +66,7 @@ impl FunctionSignature {
             .collect();
 
         FunctionSignature {
+            kind: SigKind::Struct,
             visibility: node.visibility().map(|n| n.syntax().text().to_string()),
             name: node.name().map(|n| n.text().to_string()),
             ret_type: node.name().map(|n| n.text().to_string()),
@@ -86,6 +94,7 @@ impl From<&'_ ast::FnDef> for FunctionSignature {
         }
 
         FunctionSignature {
+            kind: SigKind::Function,
             visibility: node.visibility().map(|n| n.syntax().text().to_string()),
             name: node.name().map(|n| n.text().to_string()),
             ret_type: node
@@ -108,7 +117,10 @@ impl Display for FunctionSignature {
         }
 
         if let Some(name) = &self.name {
-            write!(f, "fn {}", name)?;
+            match self.kind {
+                SigKind::Function => write!(f, "fn {}", name)?,
+                SigKind::Struct => write!(f, "struct {}", name)?,
+            }
         }
 
         if !self.generic_parameters.is_empty() {
-- 
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