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visit_each support added.

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[SVN r11784]
This commit is contained in:
Peter Dimov
2001-11-26 13:28:16 +00:00
parent f17fa79f2b
commit 46a32f7547
3 changed files with 127 additions and 102 deletions
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bind_visitor.cpp
+30 -25
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@@ -8,8 +8,6 @@
//
// bind_visitor.cpp - tests bind.hpp with a visitor
//
// Version 1.00.0003 (2001-10-18)
//
// Copyright (c) 2001 Peter Dimov and Multi Media Ltd.
//
// Permission to copy, use, modify, sell and distribute this software
@@ -20,42 +18,48 @@
#include <boost/bind.hpp>
#include <boost/ref.hpp>
#if defined(BOOST_MSVC) && (BOOST_MSVC < 1300)
#pragma warning(push, 3)
#endif
#include <iostream>
#include <typeinfo>
#if defined(BOOST_MSVC) && (BOOST_MSVC < 1300)
#pragma warning(pop)
#endif
// default implementation of visit_each
namespace boost
{
template<class V, class T> void visit_each(V & v, T const & t, long)
{
v(t, 0);
}
}
// visitor
int hash = 0;
struct ref_visitor
struct visitor
{
template<class R, class F, class L> void operator()(boost::_bi::bind_t<R, F, L> const & b) const
{
b.accept(*this);
}
template<class T> void operator()(boost::reference_wrapper<T> const & r) const
template<class T> void operator()(boost::reference_wrapper<T> const & r, int) const
{
std::cout << "Reference to " << typeid(T).name() << " @ " << &r.get() << " (with value " << r.get() << ")\n";
hash += r.get();
}
#ifndef BOOST_MSVC
template<class T> void operator()(T const &) const
template<class T> void operator()(T const &, long) const
{
std::cout << "Catch-all: " << typeid(T).name() << '\n';
std::cout << "Value of type " << typeid(T).name() << '\n';
++hash;
}
#else
void operator()(...) const
{
}
#endif
};
int f(int & i, int & j)
int f(int & i, int & j, int)
{
++i;
--j;
@@ -83,7 +87,8 @@ int main()
{
using namespace boost;
ref_visitor()(bind<int>(bind(f, ref(x), _1), ref(y)));
visitor v;
visit_each(v, bind<int>(bind(f, ref(x), _1, 42), ref(y)), 0);
return detect_errors(hash == 9);
return detect_errors(hash == 12);
}