mirror of
https://github.com/BlackMATov/meta.hpp.git
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84 lines
2.6 KiB
C++
84 lines
2.6 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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struct ivec2 {
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int x{};
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int y{};
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ivec2& add(const ivec2& other) {
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x += other.x;
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y += other.y;
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return *this;
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}
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friend bool operator==(const ivec2& l, const ivec2& r) {
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return l.x == r.x && l.y == r.y;
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}
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};
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}
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TEST_CASE("meta/meta_examples/method/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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.method_("add", &ivec2::add);
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// resolves a method type by pointer
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const meta::method_type add_method_type = meta::resolve_type(&ivec2::add);
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// also, it can be resolved by static method type
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CHECK(add_method_type == meta::resolve_type<ivec2&(ivec2::*)(const ivec2&)>());
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// allows to know the owner class type
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CHECK(add_method_type.get_owner_type() == meta::resolve_type<ivec2>());
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// checks a return value type
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CHECK(add_method_type.get_return_type() == meta::resolve_type<ivec2&>());
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// allows to know an argument count
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CHECK(add_method_type.get_arity() == 1);
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// ... and their types
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CHECK(add_method_type.get_argument_type(0) == meta::resolve_type<const ivec2&>());
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}
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TEST_CASE("meta/meta_examples/method/usage") {
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namespace meta = meta_hpp;
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ivec2 v{20, 10};
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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 method 'add' by name
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const meta::method ivec2_add = ivec2_type.get_method("add");
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// checks the type of the method 'add'
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CHECK(ivec2_add.get_type() == meta::resolve_type<ivec2&(ivec2::*)(const ivec2&)>());
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// checks the ability to call the method with specific arguments
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CHECK(ivec2_add.is_invocable_with(v, ivec2{22, 11}));
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CHECK(ivec2_add.is_invocable_with<ivec2&, ivec2>());
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// calls the method and retrieves a returned value
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const meta::uvalue ivec2_add_result_value = ivec2_add.invoke(v, ivec2{22, 11});
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// checks the type and value of the result
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CHECK(ivec2_add_result_value.get_type() == meta::resolve_type<ivec2>());
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CHECK(ivec2_add_result_value.as<ivec2>() == ivec2{42, 21});
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// checks the result of our manipulations
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CHECK(v == ivec2{42, 21});
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}
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