From 32fac7cbe4d6b9c9434ffe0b2676df6dcf9931ee Mon Sep 17 00:00:00 2001
From: John Firebaugh <john.firebaugh@gmail.com>
Date: Tue, 13 Sep 2016 14:07:43 -0700
Subject: [core] Use optional to represent possible absence, not empty strings

---
 src/mbgl/layout/symbol_feature.hpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'src/mbgl/layout/symbol_feature.hpp')

diff --git a/src/mbgl/layout/symbol_feature.hpp b/src/mbgl/layout/symbol_feature.hpp
index 3b4eb78d86..fa5af97861 100644
--- a/src/mbgl/layout/symbol_feature.hpp
+++ b/src/mbgl/layout/symbol_feature.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <mbgl/tile/geometry_tile_data.hpp>
+#include <mbgl/util/optional.hpp>
 
 #include <string>
 
@@ -9,8 +10,8 @@ namespace mbgl {
 class SymbolFeature {
 public:
     GeometryCollection geometry;
-    std::u32string label;
-    std::string sprite;
+    optional<std::u32string> label;
+    optional<std::string> sprite;
     std::size_t index;
 };
 
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