initial commit

2025-12-13 07:25:39 +07:00 · 2020-06-04 23:15:00 +07:00
commit e986d49ed6
23 changed files with 667 additions and 0 deletions
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -0,0 +1,45 @@
+image:
+  - Visual Studio 2017
+  - Visual Studio 2019
+
+platform:
+  - x86
+  - x64
+
+configuration:
+  - Debug
+  - Release
+
+for:
+
+-
+  matrix:
+    only:
+      - platform: x86
+        configuration: Debug
+  build_script:
+    - scripts\build_debug_x86.bat
+
+-
+  matrix:
+    only:
+      - platform: x64
+        configuration: Debug
+  build_script:
+    - scripts\build_debug_x64.bat
+
+-
+  matrix:
+    only:
+      - platform: x86
+        configuration: Release
+  build_script:
+    - scripts\build_release_x86.bat
+
+-
+  matrix:
+    only:
+      - platform: x64
+        configuration: Release
+  build_script:
+    - scripts\build_release_x64.bat
--- a/.codecov.yml
+++ b/.codecov.yml
@@ -0,0 +1,4 @@
+ignore:
+  - "catch.hpp"
+  - "catch_main.hpp"
+  - "*_tests.cpp"
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1,3 @@
+build/*
+.vscode/*
+CMakeLists.txt.user
--- a/.travis.yml
+++ b/.travis.yml
@@ -0,0 +1,159 @@
+language: cpp
+
+matrix:
+  include:
+
+    #
+    # windows (MSVC 2017)
+    #
+
+    - os: windows
+      stage: windows
+      name: debug, MSVC 2017, x86
+      script: ./scripts/build_debug_x86.bat
+
+    - os: windows
+      stage: windows
+      name: release, MSVC 2017, x86
+      script: ./scripts/build_release_x86.bat
+
+    - os: windows
+      stage: windows
+      name: debug, MSVC 2017, x64
+      script: ./scripts/build_debug_x64.bat
+
+    - os: windows
+      stage: windows
+      name: release, MSVC 2017, x64
+      script: ./scripts/build_release_x64.bat
+
+    #
+    # linux (g++-7)
+    #
+
+    - os: linux
+      dist: xenial
+      stage: linux
+      name: debug, g++-7
+      addons: { apt: { sources: ["ubuntu-toolchain-r-test"], packages: ["g++-7"] } }
+      env: CC=gcc-7 CXX=g++-7
+      script: ./scripts/build_debug.sh
+
+    - os: linux
+      dist: xenial
+      stage: linux
+      name: release, g++-7
+      addons: { apt: { sources: ["ubuntu-toolchain-r-test"], packages: ["g++-7"] } }
+      env: CC=gcc-7 CXX=g++-7
+      script: ./scripts/build_release.sh
+
+    #
+    # linux (g++-8)
+    #
+
+    - os: linux
+      dist: xenial
+      stage: linux
+      name: debug, g++-8
+      addons: { apt: { sources: ["ubuntu-toolchain-r-test"], packages: ["g++-8"] } }
+      env: CC=gcc-8 CXX=g++-8
+      script: ./scripts/build_debug.sh
+
+    - os: linux
+      dist: xenial
+      stage: linux
+      name: release, g++-8
+      addons: { apt: { sources: ["ubuntu-toolchain-r-test"], packages: ["g++-8"] } }
+      env: CC=gcc-8 CXX=g++-8
+      script: ./scripts/build_release.sh
+
+    #
+    # linux (clang++-5.0)
+    #
+
+    - os: linux
+      dist: xenial
+      stage: linux
+      name: debug, clang++-5.0
+      addons: { apt: { sources: ["ubuntu-toolchain-r-test", "llvm-toolchain-xenial-5.0"], packages: ["g++-7", "clang-5.0"] } }
+      env: CC=clang-5.0 CXX=clang++-5.0
+      script: ./scripts/build_debug.sh
+
+    - os: linux
+      dist: xenial
+      stage: linux
+      name: release, clang++-5.0
+      addons: { apt: { sources: ["ubuntu-toolchain-r-test", "llvm-toolchain-xenial-5.0"], packages: ["g++-7", "clang-5.0"] } }
+      env: CC=clang-5.0 CXX=clang++-5.0
+      script: ./scripts/build_release.sh
+
+    #
+    # linux (clang++-6.0)
+    #
+
+    - os: linux
+      dist: xenial
+      stage: linux
+      name: debug, clang++-6.0
+      addons: { apt: { sources: ["ubuntu-toolchain-r-test", "llvm-toolchain-xenial-6.0"], packages: ["g++-7", "clang-6.0"] } }
+      env: CC=clang-6.0 CXX=clang++-6.0
+      script: ./scripts/build_debug.sh
+
+    - os: linux
+      dist: xenial
+      stage: linux
+      name: release, clang++-6.0
+      addons: { apt: { sources: ["ubuntu-toolchain-r-test", "llvm-toolchain-xenial-6.0"], packages: ["g++-7", "clang-6.0"] } }
+      env: CC=clang-6.0 CXX=clang++-6.0
+      script: ./scripts/build_release.sh
+
+    #
+    # macosx (xcode10)
+    #
+
+    - os: osx
+      osx_image: xcode10
+      stage: macosx
+      name: debug, xcode10
+      script: ./scripts/build_debug.sh
+
+    - os: osx
+      osx_image: xcode10
+      stage: macosx
+      name: release, xcode10
+      script: ./scripts/build_release.sh
+
+    #
+    # macosx (xcode11)
+    #
+
+    - os: osx
+      osx_image: xcode11
+      stage: macosx
+      name: debug, xcode11
+      script: ./scripts/build_debug.sh
+
+    - os: osx
+      osx_image: xcode11
+      stage: macosx
+      name: release, xcode11
+      script: ./scripts/build_release.sh
+
+    #
+    # coverage
+    #
+
+    - os: osx
+      osx_image: xcode10
+      stage: coverage
+      name: coverage, xcode10
+      addons: { homebrew: { packages: ["lcov"], update: true } }
+      script: ./scripts/upload_coverage.sh
+
+before_install:
+  - if [ "$TRAVIS_OS_NAME" == 'linux' ]; then
+    mkdir $HOME/cmake;
+    export PATH="$HOME/cmake/bin:$PATH";
+    travis_retry wget -q https://cmake.org/files/v3.11/cmake-3.11.4-Linux-x86_64.sh;
+    sh cmake-3.11.4-Linux-x86_64.sh --prefix=$HOME/cmake --exclude-subdir --skip-license;
+    fi
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -0,0 +1,20 @@
+# 3.8 version is required for `cxx_std_17`
+cmake_minimum_required(VERSION 3.8 FATAL_ERROR)
+
+if(NOT DEFINED PROJECT_NAME)
+    set(BUILD_AS_STANDALONE ON)
+endif()
+
+project(defer.hpp)
+
+add_library(${PROJECT_NAME} INTERFACE)
+target_compile_features(${PROJECT_NAME} INTERFACE cxx_std_17)
+target_include_directories(${PROJECT_NAME} INTERFACE headers)
+
+if(BUILD_AS_STANDALONE)
+    option(BUILD_WITH_UNTESTS "Build with unit tests" ON)
+    if(BUILD_WITH_UNTESTS)
+        enable_testing()
+        add_subdirectory(untests)
+    endif()
+endif()
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (C) 2020, by Matvey Cherevko (blackmatov@gmail.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
--- a/README.md
+++ b/README.md
@@ -0,0 +1,51 @@
+# defer.hpp
+
+[![travis][badge.travis]][travis]
+[![appveyor][badge.appveyor]][appveyor]
+[![codecov][badge.codecov]][codecov]
+[![language][badge.language]][language]
+[![license][badge.license]][license]
+[![paypal][badge.paypal]][paypal]
+
+[badge.travis]: https://img.shields.io/travis/BlackMATov/defer.hpp/master.svg?logo=travis
+[badge.appveyor]: https://img.shields.io/appveyor/ci/BlackMATov/defer-hpp/master.svg?logo=appveyor
+[badge.codecov]: https://img.shields.io/codecov/c/github/BlackMATov/defer.hpp/master.svg?logo=codecov
+[badge.language]: https://img.shields.io/badge/language-C%2B%2B17-yellow.svg
+[badge.license]: https://img.shields.io/badge/license-MIT-blue.svg
+[badge.paypal]: https://img.shields.io/badge/donate-PayPal-orange.svg?logo=paypal&colorA=00457C
+
+[travis]: https://travis-ci.org/BlackMATov/defer.hpp
+[appveyor]: https://ci.appveyor.com/project/BlackMATov/defer-hpp
+[codecov]: https://codecov.io/gh/BlackMATov/defer.hpp
+[language]: https://en.wikipedia.org/wiki/C%2B%2B17
+[license]: https://en.wikipedia.org/wiki/MIT_License
+[paypal]: https://www.paypal.me/matov
+
+[defer]: https://github.com/BlackMATov/defer.hpp
+
+## Requirements
+
+- [gcc](https://www.gnu.org/software/gcc/) **>= 7**
+- [clang](https://clang.llvm.org/) **>= 5.0**
+- [msvc](https://visualstudio.microsoft.com/) **>= 2017**
+
+## Installation
+
+[defer.hpp][defer] is a header-only library. All you need to do is copy the headers files from `headers` directory into your project and include them:
+
+```cpp
+#include "defer.hpp/defer.hpp"
+```
+
+Also, you can add the root repository directory to your [cmake](https://cmake.org) project:
+
+```cmake
+add_subdirectory(external/defer.hpp)
+target_link_libraries(your_project_target defer.hpp)
+```
+
+## Examples
+
+TODO
+
+## [License (MIT)](./LICENSE.md)
--- a/headers/defer.hpp/defer.hpp
+++ b/headers/defer.hpp/defer.hpp
@@ -0,0 +1,150 @@
+/*******************************************************************************
+ * This file is part of the "https://github.com/blackmatov/defer.hpp"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2020, by Matvey Cherevko (blackmatov@gmail.com)
+ ******************************************************************************/
+
+#pragma once
+
+#include <exception>
+#include <functional>
+#include <tuple>
+#include <type_traits>
+#include <utility>
+
+namespace defer_hpp
+{
+    namespace impl
+    {
+        class noncopyable {
+        public:
+            noncopyable(const noncopyable&) = delete;
+            noncopyable& operator=(const noncopyable&) = delete;
+        protected:
+            noncopyable() = default;
+            ~noncopyable() = default;
+        };
+
+        template < typename F, typename... Args >
+        class defer_impl : noncopyable {
+        public:
+            template < typename UF >
+            explicit defer_impl(
+                UF&& f,
+                std::tuple<Args...>&& args)
+            : f_(std::forward<UF>(f))
+            , args_(std::move(args)) {}
+
+            virtual ~defer_impl() noexcept {
+                if ( !dismissed_ ) {
+                    std::apply(std::move(f_), std::move(args_));
+                }
+            }
+
+            void dismiss() noexcept {
+                dismissed_ = true;
+            }
+        private:
+            F f_;
+            std::tuple<Args...> args_;
+            bool dismissed_{};
+        };
+
+        template < typename F, typename... Args >
+        class error_defer_impl final : public defer_impl<F, Args...> {
+        public:
+            template < typename UF >
+            explicit error_defer_impl(
+                UF&& f,
+                std::tuple<Args...>&& args)
+            : defer_impl<F>(std::forward<UF>(f), std::move(args))
+            , exceptions_(std::uncaught_exceptions()) {}
+
+            ~error_defer_impl() noexcept final {
+                if ( exceptions_ == std::uncaught_exceptions() ) {
+                    this->dismiss();
+                }
+            }
+        private:
+            int exceptions_{};
+        };
+
+        template < typename F, typename... Args >
+        class return_defer_impl final : public defer_impl<F, Args...> {
+        public:
+            template < typename UF >
+            explicit return_defer_impl(
+                UF&& f,
+                std::tuple<Args...>&& args)
+            : defer_impl<F>(std::forward<UF>(f), std::move(args))
+            , exceptions_(std::uncaught_exceptions()) {}
+
+            ~return_defer_impl() noexcept final {
+                if ( exceptions_ != std::uncaught_exceptions() ) {
+                    this->dismiss();
+                }
+            }
+        private:
+            int exceptions_{};
+        };
+    }
+
+    template < typename F, typename... Args >
+    auto make_defer(F&& f, Args&&... args) {
+        using defer_t = impl::defer_impl<
+            std::decay_t<F>,
+            std::decay_t<Args>...>;
+        return defer_t(
+            std::forward<F>(f),
+            std::make_tuple(std::forward<Args>(args)...));
+    }
+
+    template < typename F, typename... Args >
+    auto make_error_defer(F&& f, Args&&... args) {
+        using defer_t = impl::error_defer_impl<
+            std::decay_t<F>,
+            std::decay_t<Args>...>;
+        return defer_t(
+            std::forward<F>(f),
+            std::make_tuple(std::forward<Args>(args)...));
+    }
+
+    template < typename F, typename... Args >
+    auto make_return_defer(F&& f, Args&&... args) {
+        using defer_t = impl::return_defer_impl<
+            std::decay_t<F>,
+            std::decay_t<Args>...>;
+        return defer_t(
+            std::forward<F>(f),
+            std::make_tuple(std::forward<Args>(args)...));
+    }
+}
+
+#define DEFER_IMPL_PP_CAT(x, y) DEFER_IMPL_PP_CAT_I(x, y)
+#define DEFER_IMPL_PP_CAT_I(x, y) x ## y
+
+#ifdef __COUNTER__
+    #define DEFER(...)\
+        auto DEFER_IMPL_PP_CAT(generated_defer_, __COUNTER__) =\
+            ::defer_hpp::make_defer(__VA_ARGS__)
+
+    #define ERROR_DEFER(...)\
+        auto DEFER_IMPL_PP_CAT(generated_error_defer_, __COUNTER__) =\
+            ::defer_hpp::make_error_defer(__VA_ARGS__)
+
+    #define RETURN_DEFER(...)\
+        auto DEFER_IMPL_PP_CAT(generated_return_defer_, __COUNTER__) =\
+            ::defer_hpp::make_return_defer(__VA_ARGS__)
+#else
+    #define DEFER(...)\
+        auto DEFER_IMPL_PP_CAT(generated_defer_, __LINE__) =\
+            ::defer_hpp::make_defer(__VA_ARGS__)
+
+    #define ERROR_DEFER(...)\
+        auto DEFER_IMPL_PP_CAT(generated_error_defer_, __LINE__) =\
+            ::defer_hpp::make_error_defer(__VA_ARGS__)
+
+    #define RETURN_DEFER(...)\
+        auto DEFER_IMPL_PP_CAT(generated_return_defer_, __LINE__) =\
+            ::defer_hpp::make_return_defer(__VA_ARGS__)
+#endif
--- a/scripts/build_all.bat
+++ b/scripts/build_all.bat
@@ -0,0 +1,12 @@
+@echo off
+set SCRIPT_DIR=%~dp0%
+call %SCRIPT_DIR%\build_debug_x86.bat || goto :error
+call %SCRIPT_DIR%\build_debug_x64.bat || goto :error
+call %SCRIPT_DIR%\build_release_x86.bat || goto :error
+call %SCRIPT_DIR%\build_release_x64.bat || goto :error
+
+goto :EOF
+
+:error
+echo Failed with error #%errorlevel%.
+exit /b %errorlevel%
--- a/scripts/build_all.sh
+++ b/scripts/build_all.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+set -e
+SCRIPT_DIR=`dirname "$BASH_SOURCE"`
+$SCRIPT_DIR/build_debug.sh
+$SCRIPT_DIR/build_release.sh
--- a/scripts/build_clear.bat
+++ b/scripts/build_clear.bat
@@ -0,0 +1,9 @@
+@echo off
+set BUILD_DIR=%~dp0%\..\build
+rmdir /s /q %BUILD_DIR% || goto :error
+
+goto :EOF
+
+:error
+echo Failed with error #%errorlevel%.
+exit /b %errorlevel%
--- a/scripts/build_clear.sh
+++ b/scripts/build_clear.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+BUILD_DIR=`dirname "$BASH_SOURCE"`/../build
+rm -rf $BUILD_DIR
--- a/scripts/build_debug.sh
+++ b/scripts/build_debug.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+set -e
+BUILD_DIR=`dirname "$BASH_SOURCE"`/../build
+mkdir -p $BUILD_DIR/Debug
+pushd $BUILD_DIR/Debug
+cmake -DCMAKE_BUILD_TYPE=Debug ../..
+cmake --build .
+ctest --verbose
+popd
--- a/scripts/build_debug_x64.bat
+++ b/scripts/build_debug_x64.bat
@@ -0,0 +1,14 @@
+@echo off
+set BUILD_DIR=%~dp0%\..\build
+mkdir %BUILD_DIR%\Debug\x64 || goto :error
+pushd %BUILD_DIR%\Debug\x64 || goto :error
+cmake ..\..\.. -A x64 || goto :error
+cmake --build . --config Debug || goto :error
+ctest --verbose || goto :error
+popd || goto :error
+
+goto :EOF
+
+:error
+echo Failed with error #%errorlevel%.
+exit /b %errorlevel%
--- a/scripts/build_debug_x86.bat
+++ b/scripts/build_debug_x86.bat
@@ -0,0 +1,14 @@
+@echo off
+set BUILD_DIR=%~dp0%\..\build
+mkdir %BUILD_DIR%\Debug\x86 || goto :error
+pushd %BUILD_DIR%\Debug\x86 || goto :error
+cmake ..\..\.. -A Win32 || goto :error
+cmake --build . --config Debug || goto :error
+ctest --verbose || goto :error
+popd || goto :error
+
+goto :EOF
+
+:error
+echo Failed with error #%errorlevel%.
+exit /b %errorlevel%
--- a/scripts/build_release.sh
+++ b/scripts/build_release.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+set -e
+BUILD_DIR=`dirname "$BASH_SOURCE"`/../build
+mkdir -p $BUILD_DIR/Release
+pushd $BUILD_DIR/Release
+cmake -DCMAKE_BUILD_TYPE=Release ../..
+cmake --build .
+ctest --verbose
+popd
--- a/scripts/build_release_x64.bat
+++ b/scripts/build_release_x64.bat
@@ -0,0 +1,14 @@
+@echo off
+set BUILD_DIR=%~dp0%\..\build
+mkdir %BUILD_DIR%\Release\x64 || goto :error
+pushd %BUILD_DIR%\Release\x64 || goto :error
+cmake ..\..\.. -A x64 || goto :error
+cmake --build . --config Release || goto :error
+ctest --verbose || goto :error
+popd || goto :error
+
+goto :EOF
+
+:error
+echo Failed with error #%errorlevel%.
+exit /b %errorlevel%
--- a/scripts/build_release_x86.bat
+++ b/scripts/build_release_x86.bat
@@ -0,0 +1,14 @@
+@echo off
+set BUILD_DIR=%~dp0%\..\build
+mkdir %BUILD_DIR%\Release\x86 || goto :error
+pushd %BUILD_DIR%\Release\x86 || goto :error
+cmake ..\..\.. -A Win32 || goto :error
+cmake --build . --config Release || goto :error
+ctest --verbose || goto :error
+popd || goto :error
+
+goto :EOF
+
+:error
+echo Failed with error #%errorlevel%.
+exit /b %errorlevel%
--- a/scripts/upload_coverage.sh
+++ b/scripts/upload_coverage.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+set -e
+
+BUILD_DIR=`dirname "$BASH_SOURCE"`/../build
+mkdir -p $BUILD_DIR/coverage
+cd $BUILD_DIR/coverage
+cmake -DCMAKE_BUILD_TYPE=Debug -DBUILD_WITH_COVERAGE=ON ../..
+cmake --build .
+
+lcov -d . -z
+ctest --verbose
+
+lcov -d . -c -o "coverage.info"
+lcov -r "coverage.info" "*/usr/*" "*/catch.hpp" "*/catch_main.cpp" "*_tests.cpp" "*_examples.cpp" -o "coverage.info"
+lcov -l "coverage.info"
+
+bash <(curl -s https://codecov.io/bash) || echo "Codecov did not collect coverage reports"
--- a/untests/CMakeLists.txt
+++ b/untests/CMakeLists.txt
@@ -0,0 +1,50 @@
+# 3.11 version is required for `FetchContent`
+cmake_minimum_required(VERSION 3.11 FATAL_ERROR)
+
+project(defer.hpp.untests)
+
+#
+# coverage
+#
+
+option(BUILD_WITH_COVERAGE "Build with coverage" OFF)
+if(BUILD_WITH_COVERAGE AND (CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang"))
+    set(COVERAGE_FLAGS "--coverage")
+    set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${COVERAGE_FLAGS}")
+    set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${COVERAGE_FLAGS}")
+    set(CMAKE_LINKER_FLAGS_DEBUG "${CMAKE_LINKER_FLAGS_DEBUG} ${COVERAGE_FLAGS}")
+endif()
+
+#
+# executable
+#
+
+file(GLOB UNTESTS_SOURCES "*.cpp" "*.hpp")
+add_executable(${PROJECT_NAME} ${UNTESTS_SOURCES})
+target_link_libraries(${PROJECT_NAME} defer.hpp)
+
+target_compile_options(${PROJECT_NAME}
+    PRIVATE
+    $<$<CXX_COMPILER_ID:MSVC>:
+        /W4>
+    PRIVATE
+    $<$<OR:$<CXX_COMPILER_ID:GNU>,$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>>:
+        -Wall -Wextra -Wpedantic>)
+
+add_test(${PROJECT_NAME} ${PROJECT_NAME})
+
+#
+# catchorg/catch2
+#
+
+include(FetchContent)
+FetchContent_Declare(
+    catchorg_catch2
+    GIT_REPOSITORY https://github.com/catchorg/catch2)
+
+FetchContent_GetProperties(catchorg_catch2)
+if(NOT catchorg_catch2_POPULATED)
+    FetchContent_Populate(catchorg_catch2)
+    target_include_directories(${PROJECT_NAME}
+        PRIVATE ${catchorg_catch2_SOURCE_DIR}/single_include)
+endif()
--- a/untests/catch_main.cpp
+++ b/untests/catch_main.cpp
@@ -0,0 +1,9 @@
+/*******************************************************************************
+ * This file is part of the "https://github.com/blackmatov/defer.hpp"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2020, by Matvey Cherevko (blackmatov@gmail.com)
+ ******************************************************************************/
+
+#define CATCH_CONFIG_MAIN
+#define CATCH_CONFIG_FAST_COMPILE
+#include <catch2/catch.hpp>
--- a/untests/defer_examples.cpp
+++ b/untests/defer_examples.cpp
@@ -0,0 +1,17 @@
+/*******************************************************************************
+ * This file is part of the "https://github.com/blackmatov/defer.hpp"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2020, by Matvey Cherevko (blackmatov@gmail.com)
+ ******************************************************************************/
+
+#define CATCH_CONFIG_FAST_COMPILE
+#include <catch2/catch.hpp>
+
+#include <defer.hpp/defer.hpp>
+
+namespace
+{
+}
+
+TEST_CASE("examples") {
+}
--- a/untests/defer_tests.cpp
+++ b/untests/defer_tests.cpp
@@ -0,0 +1,17 @@
+/*******************************************************************************
+ * This file is part of the "https://github.com/blackmatov/defer.hpp"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2020, by Matvey Cherevko (blackmatov@gmail.com)
+ ******************************************************************************/
+
+#define CATCH_CONFIG_FAST_COMPILE
+#include <catch2/catch.hpp>
+
+#include <defer.hpp/defer.hpp>
+
+namespace
+{
+}
+
+TEST_CASE("defer") {
+}