source: downloads/boost_1_34_1/libs/spirit/test/for_tests.cpp @ 33

/*=============================================================================
    Copyright (c) 2003 Martin Wille
    http://spirit.sourceforge.net/

    Use, modification and distribution is subject to 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)
=============================================================================*/
// vi:ts=4:sw=4:et
// Tests for spirit::for_p
// [13-Jan-2003]
////////////////////////////////////////////////////////////////////////////////
#define qDebug 0
#include <iostream>
#include <cstring>
#if qDebug
#define SPIRIT_DEBUG
#endif
#include <string>
#include <boost/spirit/core.hpp>
#include <boost/spirit/actor/assign_actor.hpp>
#include <boost/spirit/dynamic/for.hpp>
#include <boost/ref.hpp>
#include "impl/string_length.hpp"

namespace local
{
    template <typename T>
    struct var_wrapper
        : public ::boost::reference_wrapper<T>
    {
        typedef ::boost::reference_wrapper<T> parent;

        explicit inline var_wrapper(T& t) : parent(t) {}

        inline T& operator()() const { return parent::get(); }
    };

    template <typename T>
    inline var_wrapper<T>
    var(T& t)
    {
        return var_wrapper<T>(t);
    }
}

namespace
{
    template <typename T>
    class add_actor
    {
    public:
        explicit add_actor(T &ref_) : ref(ref_) {}

        template <typename T2>
        void operator()(T2 const &val) const
        { ref += val; }

    private:
        T& ref;
    };

    template <typename T>
    inline add_actor<T> const
    add(T& ref)
    {
        return add_actor<T>(ref);
    }
}

typedef ::boost::spirit::rule<> rule_t;

unsigned int test_count = 0;
unsigned int error_count = 0;

unsigned int iterations_performed;
unsigned int iterations_desired;
std::string  input_matched;

//static const unsigned int kError = 999;
static const bool good = true;
static const bool bad = false;

rule_t for_rule;
rule_t for_rule2;

void
test_for
(
    char const *s,
    bool succeed,
    rule_t const &r,
    unsigned int iterations_expected
)
{
    using namespace std;
    
    ++test_count;

    iterations_performed = 0;

    ::boost::spirit::parse_info<> m = ::boost::spirit::parse(s, s + test_impl::string_length(s), r);

    bool result = (succeed==m.full)?good:bad;

    if (m.full && (m.length != test_impl::string_length(s)))
        result = bad;

    result &= iterations_expected == iterations_performed;

    if (result==good)
        cout << "PASSED";
    else
    {
        ++error_count;
        cout << "FAILED";
    }

    cout << ": \"" << s << "\" ==> ";
    if (!m.full)
        cout << "<error>";
    else
        cout << '"' << input_matched << '"';

    cout << "     " << iterations_performed << " of "
         << iterations_desired << " iterations\n";
}

namespace
{
    void zero() { iterations_performed = 0; }

    struct inc
    {
        inline void operator()() const { ++iterations_performed; }
    };
    struct cmp
    {
        inline bool operator()() const
        {
            return iterations_performed<iterations_desired;
        }
    };
}

int
main()
{
    using namespace std;

    using boost::spirit::uint_p;
    using boost::spirit::for_p;
    using boost::spirit::assign_a;

#if qDebug
    SPIRIT_DEBUG_RULE(for_rule);
    SPIRIT_DEBUG_RULE(for_rule2);
#endif

    for_rule
        =   uint_p[assign_a(iterations_desired)] >> ':'
        >>  for_p(&zero, cmp(), inc())["xy"]
            [assign_a(input_matched)]
        ;

    for_rule2
        =   for_p(&zero, '.', inc())["xy"]
            [assign_a(input_matched)]
        ;

    cout << "/////////////////////////////////////////////////////////\n";
    cout << "\n";
    cout << "          for_p test\n";
    cout << "\n";
    cout << "/////////////////////////////////////////////////////////\n";
    cout << "\n";

    test_for("3:xyxyxy",    true, for_rule, 3);
    test_for("3:",         false, for_rule, 0);
    test_for("3:xyxy",     false, for_rule, 2);
    test_for("3:xyxyxyxy", false, for_rule, 3);

    test_for(".xy.xy.xy", true, for_rule2, 3);
    test_for(".xy.xy.xy.", false, for_rule2, 3);

    std::cout << "\n    ";
    if (error_count==0)
        cout << "All " << test_count << " for_p-tests passed.\n"
             << "Test concluded successfully\n";
    else
        cout << error_count << " of " << test_count << " for_p-tests failed\n"
             << "Test failed\n";

    return error_count!=0;
}