From 748dd3c23a31e34a155c325f281d21b7cd516c72 Mon Sep 17 00:00:00 2001
From: Joseph Lenox <lenox.joseph@gmail.com>
Date: Sat, 5 Jan 2019 23:45:17 -0600
Subject: [PATCH] add const begin/end iterators to SurfaceCollection to let it
 work in range-based for loops (const)

---
 xs/src/libslic3r/SurfaceCollection.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xs/src/libslic3r/SurfaceCollection.hpp b/xs/src/libslic3r/SurfaceCollection.hpp
index 02b54a463..0fb30a734 100644
--- a/xs/src/libslic3r/SurfaceCollection.hpp
+++ b/xs/src/libslic3r/SurfaceCollection.hpp
@@ -78,6 +78,8 @@ class SurfaceCollection
     Surfaces::iterator end() { return this->surfaces.end();}
     Surfaces::const_iterator cbegin() const { return this->surfaces.cbegin();}
     Surfaces::const_iterator cend() const { return this->surfaces.cend();}
+    Surfaces::const_iterator begin() const { return this->surfaces.cbegin();}
+    Surfaces::const_iterator end() const { return this->surfaces.cend();}
 };
 
 }