From 5ba855f46ee142121385eeaa323104138d285e8f Mon Sep 17 00:00:00 2001
From: Jeremiah Willcock <jewillco@osl.iu.edu>
Date: Mon, 26 Aug 2013 04:11:49 +0000
Subject: [PATCH] Removed use of "void" as property type to avoid errors in
 Clang; added static assertion to prevent this use in the future (it is broken
 anyway)

[SVN r85472]
---
 include/boost/graph/compressed_sparse_row_graph.hpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/boost/graph/compressed_sparse_row_graph.hpp b/include/boost/graph/compressed_sparse_row_graph.hpp
index de3234a0..7b91d4d6 100644
--- a/include/boost/graph/compressed_sparse_row_graph.hpp
+++ b/include/boost/graph/compressed_sparse_row_graph.hpp
@@ -192,6 +192,11 @@ class compressed_sparse_row_graph<directedS, VertexProperty, EdgeProperty, Graph
                                             VertexProperty, Vertex, typed_identity_property_map<Vertex> >
     inherited_vertex_properties;
 
+  // Some tests to prevent use of "void" is a property type (as was done in some test cases):
+  BOOST_STATIC_ASSERT((!is_same<VertexProperty, void>::value));
+  BOOST_STATIC_ASSERT((!is_same<EdgeProperty, void>::value));
+  BOOST_STATIC_ASSERT((!is_same<GraphProperty, void>::value));
+
  public:
   // For Property Graph
   typedef GraphProperty graph_property_type;