mirror of
https://github.com/BlackMATov/meta.hpp.git
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82 lines
2.4 KiB
C++
82 lines
2.4 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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class shape {
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public:
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shape() = default;
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shape(const shape&) = default;
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virtual ~shape() = default;
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virtual int get_area() const = 0;
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};
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class rectangle : public shape {
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public:
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explicit rectangle(int width, int height)
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: width_{width}
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, height_{height} {}
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int get_width() const {
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return width_;
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}
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int get_height() const {
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return height_;
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}
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int get_area() const override {
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return width_ * height_;
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}
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private:
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int width_{};
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int height_{};
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};
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}
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TEST_CASE("meta/meta_examples/class/type") {
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namespace meta = meta_hpp;
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// 'shape' class type registration
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meta::class_<shape>()
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.method_("get_area", &shape::get_area);
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// 'rectangle' class type registration
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meta::class_<rectangle>()
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.base_<shape>()
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.constructor_<int, int>()
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.method_("get_width", &rectangle::get_width)
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.method_("get_height", &rectangle::get_height);
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// resolves a class type by static class type
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const meta::class_type rectangle_type = meta::resolve_type<rectangle>();
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// prints all class methods
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std::cout << "* rectangle" << std::endl;
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for ( auto&& [index, method] : rectangle_type.get_methods() ) {
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std::cout << " + " << index.get_name() << "/" << index.get_type().get_arity() << std::endl;
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}
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}
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TEST_CASE("meta/meta_examples/class/usage") {
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namespace meta = meta_hpp;
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// resolves a class type by static class type
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const meta::class_type rectangle_type = meta::resolve_type<rectangle>();
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// finds the method 'get_area' by name
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const meta::method rectangle_area = rectangle_type.get_method("get_area");
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// creates a rectangle instance by the registered constructor(int, int)
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const meta::uvalue rectangle_v = rectangle_type.create(10, 20);
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// calls the method with the dynamic rectangle instance 'rectangle_v'
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CHECK(rectangle_area.invoke(rectangle_v) == 200);
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}
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