spirit/test/x3/repeat.cpp

/*=============================================================================
    Copyright (c) 2001-2011 Joel de Guzman
    Copyright (c) 2025 Nana Sakisaka

    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 "test.hpp"
#include "utils.hpp"

#include <boost/spirit/home/x3.hpp>

#include <vector>
#include <string>
#include <iostream>

int main()
{
    using spirit_test::test_attr;
    using spirit_test::test;

    using namespace boost::spirit::x3::standard;
    using boost::spirit::x3::repeat;
    using boost::spirit::x3::repeat_inf;
    using boost::spirit::x3::omit;
    using boost::spirit::x3::int_;
    using boost::spirit::x3::lexeme;
    using boost::spirit::x3::char_;

    BOOST_SPIRIT_ASSERT_CONSTEXPR_CTORS(repeat['x']);
    BOOST_SPIRIT_ASSERT_CONSTEXPR_CTORS(repeat(3)['x']);
    BOOST_SPIRIT_ASSERT_CONSTEXPR_CTORS(repeat(3, 5)['x']);
    BOOST_SPIRIT_ASSERT_CONSTEXPR_CTORS(repeat(3, repeat_inf)['x']);

    {
        BOOST_TEST(test("aaaaaaaa", repeat[char_])); // kleene synonym
        BOOST_TEST(test("aaaaaaaa", repeat(8)[char_]));
        BOOST_TEST(!test("aa", repeat(3)[char_]));
        BOOST_TEST(test("aaa", repeat(3, 5)[char_]));
        BOOST_TEST(test("aaaaa", repeat(3, 5)[char_]));
        BOOST_TEST(!test("aaaaaa", repeat(3, 5)[char_]));
        BOOST_TEST(!test("aa", repeat(3, 5)[char_]));

        BOOST_TEST(test("aaa", repeat(3, repeat_inf)[char_]));
        BOOST_TEST(test("aaaaa", repeat(3, repeat_inf)[char_]));
        BOOST_TEST(test("aaaaaa", repeat(3, repeat_inf)[char_]));
        BOOST_TEST(!test("aa", repeat(3, repeat_inf)[char_]));
    }
    {
        std::string s;
        BOOST_TEST(test_attr("aaaaaaaa", repeat[char_ >> char_], s)); // kleene synonym
        BOOST_TEST(s == "aaaaaaaa");

        s.clear();
        BOOST_TEST(test_attr("aaaaaaaa", repeat(4)[char_ >> char_], s));
        BOOST_TEST(s == "aaaaaaaa");

        BOOST_TEST(!test("aa", repeat(3)[char_ >> char_]));
        BOOST_TEST(!test("a", repeat(1)[char_ >> char_]));

        s.clear();
        BOOST_TEST(test_attr("aa", repeat(1, 3)[char_ >> char_], s));
        BOOST_TEST(s == "aa");

        s.clear();
        BOOST_TEST(test_attr("aaaaaa", repeat(1, 3)[char_ >> char_], s));
        BOOST_TEST(s == "aaaaaa");

        BOOST_TEST(!test("aaaaaaa", repeat(1, 3)[char_ >> char_]));
        BOOST_TEST(!test("a", repeat(1, 3)[char_ >> char_]));

        s.clear();
        BOOST_TEST(test_attr("aaaa", repeat(2, repeat_inf)[char_ >> char_], s));
        BOOST_TEST(s == "aaaa");

        s.clear();
        BOOST_TEST(test_attr("aaaaaa", repeat(2, repeat_inf)[char_ >> char_], s));
        BOOST_TEST(s == "aaaaaa");

        BOOST_TEST(!test("aa", repeat(2, repeat_inf)[char_ >> char_]));
    }

    { // from classic spirit tests
        BOOST_TEST(test("", repeat(0, repeat_inf)['x']));

        //  repeat exact 8
        #define rep8 repeat(8)[alpha] >> 'X'
        BOOST_TEST(!test("abcdefgX", rep8, false));
        BOOST_TEST(test("abcdefghX", rep8));
        BOOST_TEST(!test("abcdefghiX", rep8, false));
        BOOST_TEST(!test("abcdefgX", rep8, false));
        BOOST_TEST(!test("aX", rep8, false));

        //  repeat 2 to 8
        #define rep28 repeat(2, 8)[alpha] >> '*'
        BOOST_TEST(test("abcdefg*", rep28));
        BOOST_TEST(test("abcdefgh*", rep28));
        BOOST_TEST(!test("abcdefghi*", rep28, false));
        BOOST_TEST(!test("a*", rep28, false));

        //  repeat 2 or more
        #define rep2_ repeat(2, repeat_inf)[alpha] >> '+'
        BOOST_TEST(test("abcdefg+", rep2_));
        BOOST_TEST(test("abcdefgh+", rep2_));
        BOOST_TEST(test("abcdefghi+", rep2_));
        BOOST_TEST(test("abcdefg+", rep2_));
        BOOST_TEST(!test("a+", rep2_, false));

        //  repeat 0
        #define rep0 repeat(0)[alpha] >> '/'
        BOOST_TEST(test("/", rep0));
        BOOST_TEST(!test("a/", rep0, false));

        //  repeat 0 or 1
        #define rep01 repeat(0, 1)[alpha >> digit] >> '?'
        BOOST_TEST(!test("abcdefg?", rep01, false));
        BOOST_TEST(!test("a?", rep01, false));
        BOOST_TEST(!test("1?", rep01, false));
        BOOST_TEST(!test("11?", rep01, false));
        BOOST_TEST(!test("aa?", rep01, false));
        BOOST_TEST(test("?", rep01));
        BOOST_TEST(test("a1?", rep01));
    }

    {
        BOOST_TEST(test(" a a aaa aa", repeat(7)[char_], space));
        BOOST_TEST(test("12345 678 9", repeat(9)[digit], space));
    }

    {
        std::vector<std::string> v;
        BOOST_TEST(test_attr("a b c d", repeat(4)[lexeme[+alpha]], v, space) && 4 == v.size() &&
            v[0] == "a" && v[1] == "b" && v[2] == "c" &&  v[3] == "d");
    }
    {
        BOOST_TEST(test("1 2 3", int_ >> repeat(2)[int_], space));
        BOOST_TEST(!test("1 2", int_ >> repeat(2)[int_], space));
    }

    {
        std::vector<int> v;
        BOOST_TEST(test_attr("1 2 3", int_ >> repeat(2)[int_], v, space));
        BOOST_TEST(v.size() == 3 && v[0] == 1 && v[1] == 2 && v[2] == 3);

        BOOST_TEST(!test("1 2", int_ >> repeat(2)[int_], space));
    }

    { // test move only types
        std::vector<move_only> v;
        BOOST_TEST(test_attr("sss", repeat(3)[synth_move_only], v));
        BOOST_TEST_EQ(v.size(), 3);
    }

    return boost::report_errors();
}