From 05eb489ec58fbcd36f8d68c74e42166b345a3a3f Mon Sep 17 00:00:00 2001
From: "Jeremy A. Kolb" <jkolb@ara.com>
Date: Tue, 30 Oct 2018 14:07:14 -0400
Subject: Useful comments from function signatures

---
 crates/ra_lsp_server/src/main_loop/handlers.rs | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

(limited to 'crates/ra_lsp_server/src/main_loop')

diff --git a/crates/ra_lsp_server/src/main_loop/handlers.rs b/crates/ra_lsp_server/src/main_loop/handlers.rs
index 4ac08e527..20cb5f772 100644
--- a/crates/ra_lsp_server/src/main_loop/handlers.rs
+++ b/crates/ra_lsp_server/src/main_loop/handlers.rs
@@ -5,7 +5,7 @@ use languageserver_types::{
     CodeActionResponse, Command, CompletionItem, CompletionItemKind, Diagnostic,
     DiagnosticSeverity, DocumentSymbol, FoldingRange, FoldingRangeKind, FoldingRangeParams,
     InsertTextFormat, Location, Position, SymbolInformation, TextDocumentIdentifier, TextEdit,
-    RenameParams, WorkspaceEdit, PrepareRenameResponse
+    RenameParams, WorkspaceEdit, PrepareRenameResponse, Documentation, MarkupContent, MarkupKind
 };
 use gen_lsp_server::ErrorCode;
 use ra_analysis::{FileId, FoldKind, Query, RunnableKind};
@@ -465,9 +465,18 @@ pub fn handle_signature_help(
             })
             .collect();
 
+        let documentation = if let Some(doc) = descriptor.doc {
+            Some(Documentation::MarkupContent(MarkupContent {
+                kind: MarkupKind::Markdown,
+                value: doc
+            }))
+        } else {
+            None
+        };
+
         let sig_info = SignatureInformation {
             label: descriptor.label,
-            documentation: None,
+            documentation,
             parameters: Some(parameters),
         };
 
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