Initial Commit

examples/cmake/CMakeLists.txt

@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 3.20)
+project(cex_cmake_demo LANGUAGES CXX)
+set(CMAKE_CXX_STANDARD 23)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+set(DEMO_INCREMENT 1)
+configure_file(config.hpp.in generated/config.hpp @ONLY)
+add_library(numbers src/numbers.cpp)
+target_include_directories(numbers PUBLIC src PRIVATE "${CMAKE_CURRENT_BINARY_DIR}/generated")
+add_executable(cmake-demo main.cpp)
+target_link_libraries(cmake-demo PRIVATE numbers)

examples/cmake/config.hpp.in

@@ -0,0 +1,2 @@
+#pragma once
+#define DEMO_INCREMENT @DEMO_INCREMENT@

examples/cmake/main.cpp

@@ -0,0 +1,7 @@
+#include "numbers.hpp"
+template<Addable T>
+T twice(T value) { return value + value; }
+constexpr int evaluation_mode() {
+    if consteval { return 1; } else { return 2; }
+}
+int main() { return increment(twice(20)) + evaluation_mode(); }

examples/cmake/src/numbers.cpp

@@ -0,0 +1,3 @@
+#include "numbers.hpp"
+#include "config.hpp"
+int increment(int value) { return value + DEMO_INCREMENT; }

examples/cmake/src/numbers.hpp

@@ -0,0 +1,4 @@
+#pragma once
+template<class T>
+concept Addable = requires(T value) { value + value; };
+int increment(int value);