graph/example/property_iterator.cpp

// (C) Copyright Francois Faure, iMAGIS-GRAVIR / UJF, 2001.

// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)

// Revision History:
// 03 May 2001   Jeremy Siek
//      Moved property iterator code to headers.
// 02 May 2001   Francois Faure
//     Initial version.

#include <boost/graph/adjacency_list_io.hpp>
#include <boost/graph/property_iter_range.hpp>
#include <fstream>
#include <algorithm>

using namespace boost;

//======== vertex properties
struct toto_t
{
    enum
    {
        num = 23063
    };
    using kind = vertex_property_tag;
};
using Toto = property< toto_t, double >;

struct radius_t
{
    enum
    {
        num = 23062
    };
    using kind = vertex_property_tag;
};
using Radius = property< radius_t, double, Toto >;

struct mass_t
{
    enum
    {
        num = 23061
    };
    using kind = vertex_property_tag;
};
using Mass = property< mass_t, int, Radius >;

//====== edge properties
struct stiff_t
{
    enum
    {
        num = 23064
    };
    using kind = edge_property_tag;
};
using Stiff = property< stiff_t, double >;

//===== graph type
using VertexProperty = Mass;
using EdgeProperty = Stiff;
using Graph = adjacency_list< vecS, setS, bidirectionalS, VertexProperty,
    EdgeProperty >;

//===== utilities
struct Print
{
    template < class T > Print& operator()(const T& t)
    {
        std::cout << t << " ";
        return (*this);
    }
};

template < class T > struct Set
{
    T value;

    Set(const T& t) : value(t) {}

    Set& operator()(T& t)
    {
        t = value;
        return (*this);
    }
};

//===== program
int main(int argc, char* argv[])
{
    if (argc < 2)
    {
        std::cerr << "args: file" << std::endl;
        return EXIT_FAILURE;
    }

    std::ifstream readFile(argv[1]);

    Graph graph;
    readFile >> read(graph);
    std::cout << write(graph);

    std::cout << "radii:" << std::endl;
    auto seqRadius = get_property_iter_range(graph, radius_t());
    std::for_each(seqRadius.first, seqRadius.second, Print());
    std::cout << std::endl;

    std::cout << "stiff:" << std::endl;
    auto seqStiff = get_property_iter_range(graph, stiff_t());
    std::for_each(seqStiff.first, seqStiff.second, Print());
    std::cout << std::endl;

    seqStiff = get_property_iter_range(graph, stiff_t());
    std::for_each(seqStiff.first, seqStiff.second, Set< double >(2.4));

    std::cout << "new stiff:" << std::endl;
    seqStiff = get_property_iter_range(graph, stiff_t());
    std::for_each(seqStiff.first, seqStiff.second, Print());
    std::cout << std::endl;

    return 0;
}