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68 lines
1.9 KiB
C++
68 lines
1.9 KiB
C++
/*******************************************************************************
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* This file is part of the "https://github.com/blackmatov/meta.hpp"
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* For conditions of distribution and use, see copyright notice in LICENSE.md
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* Copyright (C) 2021-2025, by Matvey Cherevko (blackmatov@gmail.com)
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******************************************************************************/
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#include <meta.hpp/meta_all.hpp>
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#include <doctest/doctest.h>
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#include <fmt/core.h>
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namespace
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{
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enum class align {
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left,
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right,
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center,
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};
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}
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TEST_CASE("meta/meta_examples/enum/type") {
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namespace meta = meta_hpp;
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// 'align' enumeration type registration
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meta::enum_<align>()
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.evalue_("left", align::left)
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.evalue_("right", align::right)
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.evalue_("center", align::center);
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// resolves a enumeration type by enumerator
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const meta::enum_type align_type = meta::resolve_type(align::left);
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// also, it can be resolved by static enumeration type
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CHECK(align_type == meta::resolve_type<align>());
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// allows to know the underlying type
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CHECK(align_type.get_underlying_type() == meta::resolve_type<int>());
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// prints all enumerators
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fmt::print("* align\n");
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for ( const meta::evalue& evalue : align_type.get_evalues() ) {
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fmt::print(" - {}/{}\n",
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evalue.get_name(),
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evalue.get_underlying_value().as<int>());
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}
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// Output:
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// * align
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// - center/2
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// - left/0
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// - right/1
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}
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TEST_CASE("meta/meta_examples/enum/usage") {
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namespace meta = meta_hpp;
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const align e = align::center;
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// resolves a enumeration type by enumerator instance 'e'
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const meta::enum_type align_type = meta::resolve_type(e);
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// converts the enumerator to its name
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CHECK(align_type.value_to_evalue(e).get_name() == "center");
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// ... and back again
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CHECK(align_type.name_to_evalue("center").get_value().as<align>() == e);
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}
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