test1.cpp
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//-----------------------------------------------------------------------------
// boost-libs variant/test/test1.cpp header file
// See http://www.boost.org for updates, documentation, and revision history.
//-----------------------------------------------------------------------------
//
// Copyright (c) 2003
// Eric Friedman, Itay Maman
//
// 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)
#include "boost/config.hpp"
#ifdef BOOST_MSVC
#pragma warning(disable:4244) // conversion from const int to const short
#endif
#include "boost/core/lightweight_test.hpp"
#include "boost/variant.hpp"
#include "class_a.h"
#include "jobs.h"
#include <iostream>
#include <string>
#include <vector>
void run()
{
using boost::apply_visitor;
using boost::variant;
using std::string;
using std::vector;
using std::cout;
using std::endl;
typedef variant< char*, string, short > t_var0;
typedef variant< int, string, double > t_var1;
typedef variant< short, const char* > t_var2;
typedef variant< string, char > t_var3;
typedef variant< unsigned short, const char* > t_var4;
typedef variant< unsigned short, const char*, t_var2 > t_var5;
typedef variant< unsigned short, const char*, t_var5 > t_var6;
typedef variant< class_a, const void* > t_var7;
typedef variant< t_var6, int > t_var8;
typedef variant< t_var8, unsigned short > t_var9;
typedef variant< char, unsigned char > t_var10;
typedef variant< short, int, vector<int>, long> t_var11;
t_var1 v1;
t_var0 v0;
t_var2 v2;
t_var3 v3;
t_var4 v4;
t_var5 v5;
t_var6 v6;
t_var7 v7;
t_var8 v8;
t_var9 v9;
t_var10 v10;
t_var11 v11;
//
// Check assignment rules
//
v2 = 4;
v4 = v2;
verify(v4, spec<unsigned short>());
v2 = "abc";
v4 = v2;
verify(v4, spec<const char*>(), "[V] abc");
v5 = "def";
verify(v5, spec<const char*>(), "[V] def");
v5 = v2;
verify(v5, spec<t_var2>(), "[V] [V] abc");
v6 = 58;
verify(v6, spec<unsigned short>(), "[V] 58");
v6 = v5;
verify(v6, spec<t_var5>(), "[V] [V] [V] abc");
v8 = v2;
verify(v8, spec<t_var6>(), "[V] [V] abc");
v8 = v6;
verify(v8, spec<t_var6>(), "[V] [V] [V] [V] abc");
v7 = v2;
verify(v7, spec<const void*>());
v7 = 199;
verify(v7, spec<class_a>(), "[V] class_a(199)");
v2 = 200;
v7 = v2;
verify(v7, spec<class_a>(), "[V] class_a(200)");
//
// Check sizes of held values
//
total_sizeof ts;
v1 = 5.9;
apply_visitor(ts, v1);
v1 = 'B';
apply_visitor(ts, v1);
v1 = 3.4f;
apply_visitor(ts, v1);
BOOST_TEST(ts.result() == sizeof(int) + sizeof(double)*2);
v11 = 5;
string res_s = apply_visitor(int_printer(), v11);
BOOST_TEST(res_s == "5");
//
// A variant object holding an std::vector
//
vector<int> int_vec_1;
int_vec_1.push_back(512);
int_vec_1.push_back(256);
int_vec_1.push_back(128);
int_vec_1.push_back(64);
v11 = int_vec_1;
res_s = apply_visitor(int_printer(), v11);
BOOST_TEST(res_s == ",512,256,128,64");
}
int main()
{
run();
return boost::report_errors();
}