git subrepo clone --branch=20.41.6 git@github.com:ETLCPP/etl.git components/etl
subrepo: subdir: "components/etl" merged: "be5537ec" upstream: origin: "git@github.com:ETLCPP/etl.git" branch: "20.41.6" commit: "be5537ec" git-subrepo: version: "0.4.9" origin: "???" commit: "???"
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components/etl/test/test_function_traits.cpp
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components/etl/test/test_function_traits.cpp
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/******************************************************************************
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The MIT License(MIT)
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Embedded Template Library.
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https://github.com/ETLCPP/etl
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https://www.etlcpp.com
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Copyright(c) 2024 John Wellbelove
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files(the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions :
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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******************************************************************************/
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#include "unit_test_framework.h"
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#include <type_traits>
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#include "etl/function_traits.h"
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#include "etl/type_list.h"
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namespace
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{
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//*****************************************************************************
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// The free function taking no parameters.
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//*****************************************************************************
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void free_void()
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{
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}
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//*****************************************************************************
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// The free function taking an int parameter.
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//*****************************************************************************
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int free_int(int i, int j)
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{
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return i + j;
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}
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//*****************************************************************************
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// The test class with member functions.
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//*****************************************************************************
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class Object
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{
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public:
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//*******************************************
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// void
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void member_void()
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{
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}
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void member_void_const() const
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{
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}
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//*******************************************
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// int
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int member_int(int i, int j)
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{
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return i + j;
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}
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int member_int_const(int i, int j) const
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{
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return i + j;
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}
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//*******************************************
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// static
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static void member_static(int j)
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{
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(void)j;
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}
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};
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}
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namespace
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{
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SUITE(test_function_traits)
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{
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//*************************************************************************
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TEST(test_free_function_free_void)
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{
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free_void(); // Keep clang happy
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using traits = etl::function_traits<decltype(&free_void)>;
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CHECK_TRUE((std::is_same<void(void), traits::function_type>::value));
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CHECK_TRUE((std::is_same<void, traits::return_type>::value));
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CHECK_TRUE((std::is_same<void, traits::object_type>::value));
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CHECK_TRUE((std::is_same<etl::type_list<>, traits::argument_types>::value));
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CHECK_TRUE(traits::is_function);
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CHECK_FALSE(traits::is_member_function);
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CHECK_FALSE(traits::is_const);
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CHECK_EQUAL(0, traits::argument_count);
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}
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//*************************************************************************
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TEST(test_free_function_free_int)
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{
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free_int(1, 2); // Keep clang happy
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using traits = etl::function_traits<decltype(&free_int)>;
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CHECK_TRUE((std::is_same<int(int, int), traits::function_type>::value));
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CHECK_TRUE((std::is_same<int, traits::return_type>::value));
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CHECK_TRUE((std::is_same<void, traits::object_type>::value));
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CHECK_TRUE((std::is_same<etl::type_list<int, int>, traits::argument_types>::value));
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CHECK_TRUE(traits::is_function);
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CHECK_FALSE(traits::is_member_function);
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CHECK_FALSE(traits::is_const);
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CHECK_EQUAL(2 , traits::argument_count);
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}
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//*************************************************************************
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TEST(test_member_function_void)
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{
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using traits = etl::function_traits<decltype(&Object::member_void)>;
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CHECK_TRUE((std::is_same<void(void), traits::function_type>::value));
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CHECK_TRUE((std::is_same<void, traits::return_type>::value));
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CHECK_TRUE((std::is_same<Object, traits::object_type>::value));
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CHECK_TRUE((std::is_same<etl::type_list<>, traits::argument_types>::value));
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CHECK_FALSE(traits::is_function);
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CHECK_TRUE(traits::is_member_function);
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CHECK_FALSE(traits::is_const);
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CHECK_EQUAL(0, traits::argument_count);
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}
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//*************************************************************************
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TEST(test_member_function_void_const)
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{
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using traits = etl::function_traits<decltype(&Object::member_void_const)>;
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CHECK_TRUE((std::is_same<void(void), traits::function_type>::value));
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CHECK_TRUE((std::is_same<void, traits::return_type>::value));
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CHECK_TRUE((std::is_same<Object, traits::object_type>::value));
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CHECK_TRUE((std::is_same<etl::type_list<>, traits::argument_types>::value));
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CHECK_FALSE(traits::is_function);
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CHECK_TRUE(traits::is_member_function);
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CHECK_TRUE(traits::is_const);
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CHECK_EQUAL(0, traits::argument_count);
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}
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//*************************************************************************
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TEST(test_member_function_int)
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{
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using traits = etl::function_traits<decltype(&Object::member_int)>;
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CHECK_TRUE((std::is_same<int(int, int), traits::function_type>::value));
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CHECK_TRUE((std::is_same<int, traits::return_type>::value));
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CHECK_TRUE((std::is_same<Object, traits::object_type>::value));
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CHECK_TRUE((std::is_same<etl::type_list<int, int>, traits::argument_types>::value));
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CHECK_FALSE(traits::is_function);
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CHECK_TRUE(traits::is_member_function);
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CHECK_FALSE(traits::is_const);
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CHECK_EQUAL(2, traits::argument_count);
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}
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//*************************************************************************
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TEST(test_member_function_int_const)
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{
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using traits = etl::function_traits<decltype(&Object::member_int_const)>;
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CHECK_TRUE((std::is_same<int(int, int), traits::function_type>::value));
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CHECK_TRUE((std::is_same<int, traits::return_type>::value));
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CHECK_TRUE((std::is_same<Object, traits::object_type>::value));
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CHECK_TRUE((std::is_same<etl::type_list<int, int>, traits::argument_types>::value));
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CHECK_FALSE(traits::is_function);
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CHECK_TRUE(traits::is_member_function);
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CHECK_TRUE(traits::is_const);
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CHECK_EQUAL(2, traits::argument_count);
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}
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//*************************************************************************
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TEST(test_member_function_static)
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{
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using traits = etl::function_traits<decltype(&Object::member_static)>;
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CHECK_TRUE((std::is_same<void(int), traits::function_type>::value));
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CHECK_TRUE((std::is_same<void, traits::return_type>::value));
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CHECK_TRUE((std::is_same<void, traits::object_type>::value));
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CHECK_TRUE((std::is_same<etl::type_list<int>, traits::argument_types>::value));
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CHECK_TRUE(traits::is_function);
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CHECK_FALSE(traits::is_member_function);
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CHECK_FALSE(traits::is_const);
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CHECK_EQUAL(1, traits::argument_count);
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}
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};
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}
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