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70 lines
2.1 KiB
C++
70 lines
2.1 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) 2021-2023, by Matvey Cherevko (blackmatov@gmail.com)
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******************************************************************************/
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#include "../meta_manuals.hpp"
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namespace
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{
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struct ivec2 {
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int x{};
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int y{};
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};
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}
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TEST_CASE("meta/meta_examples/member/type") {
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namespace meta = meta_hpp;
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// 'ivec2' class type registration
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meta::class_<ivec2>()
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.member_("x", &ivec2::x)
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.member_("y", &ivec2::y);
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// resolves a member type by pointer
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const meta::member_type x_member_type = meta::resolve_type(&ivec2::x);
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// also, it can be resolved by static member type
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CHECK(x_member_type == meta::resolve_type<int ivec2::*>());
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// allows to know the owner class type
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CHECK(x_member_type.get_owner_type() == meta::resolve_type<ivec2>());
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// ... and the value type of the member
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CHECK(x_member_type.get_value_type() == meta::resolve_type<int>());
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}
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TEST_CASE("meta/meta_examples/member/usage") {
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namespace meta = meta_hpp;
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ivec2 v{42, 21};
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// resolves a class type by instance 'v'
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const meta::class_type ivec2_type = meta::resolve_type(v);
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// finds the member 'x' by name
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const meta::member ivec2_x = ivec2_type.get_member("x");
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// checks the type of the member 'x'
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CHECK(ivec2_x.get_type() == meta::resolve_type<int ivec2::*>());
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// retrieves a member value of the class instance 'v'
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const meta::uvalue ivec2_x_value = ivec2_x.get(v);
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// checks the type of the retrieved value
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CHECK(ivec2_x_value.get_type() == meta::resolve_type<int>());
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// casts the dynamic value to the typed value
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const int ivec2_x_typed_value = ivec2_x_value.get_as<int>();
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// here is our member typed value
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CHECK(ivec2_x_typed_value == 42);
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// also, we can change the member value, of course
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ivec2_x.set(v, 11);
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// checks the result of our manipulations
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CHECK(v.x == 11);
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}
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