/*******************************************************************************
 * This file is part of the "https://github.com/blackmatov/meta.hpp"
 * For conditions of distribution and use, see copyright notice in LICENSE.md
 * Copyright (C) 2021-2023, by Matvey Cherevko (blackmatov@gmail.com)
 ******************************************************************************/

#include "../meta_manuals.hpp"

#include <iostream>

namespace
{
    enum class align {
        left,
        right,
        center,
    };
}

TEST_CASE("meta/meta_examples/enum/type") {
    namespace meta = meta_hpp;

    // 'align' enumeration type registration
    meta::enum_<align>()
        .evalue_("left", align::left)
        .evalue_("right", align::right)
        .evalue_("center", align::center);

    // resolves a enumeration type by enumerator
    const meta::enum_type align_type = meta::resolve_type(align::left);

    // also, it can be resolved by static enumeration type
    CHECK(align_type == meta::resolve_type<align>());

    // allows to know the underlying type
    CHECK(align_type.get_underlying_type() == meta::resolve_type<int>());

    // prints all enumerators
    std::cout << "* align" << std::endl;
    for ( auto&& [index, evalue] : align_type.get_evalues() ) {
        std::cout << "  - " << index.get_name() << "/" << evalue.get_underlying_value().get_as<int>() << std::endl;
    }
}

TEST_CASE("meta/meta_examples/enum/usage") {
    namespace meta = meta_hpp;

    const align e = align::center;

    // resolves a enumeration type by enumerator instance 'e'
    const meta::enum_type align_type = meta::resolve_type(e);

    // converts the enumerator to its name
    CHECK(align_type.value_to_name(e) == "center");

    // ... and back again
    CHECK(align_type.name_to_value("center").get_as<align>() == e);
}