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Removed dead code/comment block from iteration macros.

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This commit is contained in:
Josh Marshall
2018-09-01 17:59:02 -04:00
parent 19c23ca255
commit 98164bf937
1 changed files with 0 additions and 39 deletions
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39
include/boost/graph/iteration_macros.hpp
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@@ -17,45 +17,6 @@
#define BGL_FIRST(linenum) (BGL_RANGE(linenum).first)
#define BGL_LAST(linenum) (BGL_RANGE(linenum).second)
/*
BGL_FORALL_VERTICES_T(v, g, graph_t) // This is on line 9
expands to the following, but all on the same line
for (typename boost::graph_traits<graph_t>::vertex_iterator
bgl_first_9 = vertices(g).first, bgl_last_9 = vertices(g).second;
bgl_first_9 != bgl_last_9; bgl_first_9 = bgl_last_9)
for (typename boost::graph_traits<graph_t>::vertex_descriptor v;
bgl_first_9 != bgl_last_9 ? (v = *bgl_first_9, true) : false;
++bgl_first_9)
The purpose of having two for-loops is just to provide a place to
declare both the iterator and value variables. There is really only
one loop. The stopping condition gets executed two more times than it
usually would be, oh well. The reason for the bgl_first_9 = bgl_last_9
in the outer for-loop is in case the user puts a break statement
in the inner for-loop.
The other macros work in a similar fashion.
Use the _T versions when the graph type is a template parameter or
dependent on a template parameter. Otherwise use the non _T versions.
-----------------------
6/9/09 THK
The above contains two calls to the vertices function. I modified these
macros to expand to
for (std::pair<typename boost::graph_traits<graph_t>::vertex_iterator,
typename boost::graph_traits<graph_t>::vertex_iterator> bgl_range_9 = vertices(g);
bgl_range_9.first != bgl_range_9.second;
bgl_range_9.first = bgl_range_9.second)
for (typename boost::graph_traits<graph_t>::vertex_descriptor v;
bgl_range_9.first != bgl_range_9.second ? (v = *bgl_range_9.first, true) : false;
++bgl_range_9.first)
*/
#define BGL_FORALL_VERTICES_T(VNAME, GNAME, GraphType) \
for (std::pair<typename boost::graph_traits<GraphType>::vertex_iterator, \