From b6c662c573014710d4e8d9fd9253793141d8bbe0 Mon Sep 17 00:00:00 2001
From: Kirill Bulatov <mail4score@gmail.com>
Date: Fri, 19 Jul 2019 08:53:12 +0300
Subject: If possible, show type lenses for the let bindings

---
 crates/ra_ide_api/src/display/structure.rs | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

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

diff --git a/crates/ra_ide_api/src/display/structure.rs b/crates/ra_ide_api/src/display/structure.rs
index 2ba10b2ef..223941688 100644
--- a/crates/ra_ide_api/src/display/structure.rs
+++ b/crates/ra_ide_api/src/display/structure.rs
@@ -1,5 +1,6 @@
 use crate::TextRange;
 
+use ra_syntax::ast::PatKind;
 use ra_syntax::{
     algo::visit::{visitor, Visitor},
     ast::{self, AttrsOwner, NameOwner, TypeAscriptionOwner, TypeParamsOwner},
@@ -155,6 +156,27 @@ fn structure_node(node: &SyntaxNode) -> Option<StructureNode> {
             }
             decl(mc)
         })
+        .visit(|let_statement: &ast::LetStmt| {
+            let let_syntax = let_statement.syntax();
+
+            let mut label = String::new();
+            collapse_ws(let_syntax, &mut label);
+
+            let pat = match let_statement.pat()?.kind() {
+                PatKind::BindPat(bind_pat) => bind_pat,
+                _ => return None,
+            };
+
+            Some(StructureNode {
+                parent: None,
+                label,
+                navigation_range: pat.syntax().range(),
+                node_range: let_syntax.range(),
+                kind: let_syntax.kind(),
+                detail: None,
+                deprecated: false,
+            })
+        })
         .accept(&node)?
 }
 
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