From c23f3afebe1da3f9e1e1c4016faf2fdda69ae3a9 Mon Sep 17 00:00:00 2001
From: Jeremy Siek <jeremy.siek@gmail.com>
Date: Mon, 7 May 2001 04:19:07 +0000
Subject: [PATCH] added root_vertex()

[SVN r10041]
---
 include/boost/graph/named_function_params.hpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/include/boost/graph/named_function_params.hpp b/include/boost/graph/named_function_params.hpp
index 58a2bb97..4bb6097b 100644
--- a/include/boost/graph/named_function_params.hpp
+++ b/include/boost/graph/named_function_params.hpp
@@ -41,6 +41,7 @@ namespace boost {
   struct vertex_invariant_t { enum { num =detail::vertex_invariant_num}; };
   struct vertex_root_t { enum { num =detail::vertex_root_num}; };
   struct orig_to_copy_t { enum { num = detail::orig_to_copy_num }; };
+  struct root_vertex_t { enum { num = detail::root_vertex_num }; };
   
   namespace detail {
     template <class T>
@@ -106,6 +107,13 @@ namespace boost {
       return Params(pmap, *this);
     }
 
+    template <typename Vertex>
+    bgl_named_params<Vertex, root_vertex_t, self>
+    root_vertex(const Vertex& r) const {
+      typedef bgl_named_params<Vertex, root_vertex_t, self> Params;
+      return Params(r, *this);
+    }
+
     template <typename ColorMap>
     bgl_named_params<ColorMap, vertex_color_t, self>
     color_map(const ColorMap& pmap) const {
@@ -289,6 +297,13 @@ namespace boost {
     return Params(pmap);
   }
 
+  template <typename Vertex>
+  bgl_named_params<Vertex, root_vertex_t>
+  root_vertex(const Vertex& r) {
+    typedef bgl_named_params<Vertex, root_vertex_t> Params;
+    return Params(r);
+  }
+
   template <typename ColorMap>
   bgl_named_params<ColorMap, vertex_color_t>
   color_map(ColorMap pmap) {