fex::linuxos::io_uring_context::async_read_only_file) () at /home/cppcon/cppcon24-async-demo/src/main.cpp:70 frame #1 : 0x0000555555583b08 in std::__1::coroutine_handle::resume[abi:ne180100]() main () at /home/cppcon/cppcon24-async-demo/src/main.cpp:10 frame #15: 0x0000555555557604 in main () at /home/cppcon/cppcon24-async-demo/src/main.cpp:10 frame #16: 0x0000555555557604 in main () () at /home/cppcon/cppcon24-async-demo/src/main.cpp:10 frame #17: 0x000055555555761c in main () at /home/cppcon/cppcon24-async-demo/src/main.cpp:10 frame #18: 0x00007ffff7b1e083 in __libc_start_main

std::__1::__libcpp_allocate[abi:v160006](unsigned long, unsigned long)+0x44 > clang -fsanitize=address main.cpp #include int main() { auto v = std::vector (16); return v[16]; }Using process(float x) { auto const y = std::vector (16); ... } > clang++ -fsanitize=realtime main.cpp > ./a.out ==86660==ERROR: RealtimeSanitizer: unsafe-library-call Intercepted call to real-time process(float x) { auto y = std::vector (16); ... } > clang++ -fsanitize=realtime main.cpp > ./a.out ==86660==ERROR: RealtimeSanitizer: unsafe-library-call Intercepted call to real-time

LIBRARY/BINARY 6 . 12SAVE LIBRARY/BINARY SAVE LIBRARY/BINARY MAIN.CPP MAIN.CPP 6 . 12SAVE LIBRARY/BINARY SAVE LIBRARY/BINARY MAIN.CPP MAIN.CPP #include // std::stoi void dispatch(int); // _Z3dispatchi _Z3dispatchi - Mangled symbol with no templates 6 . 12SAVE LIBRARY/BINARY SAVE LIBRARY/BINARY MAIN.CPP MAIN.CPP #include // std::stoi void dispatch(int); // _Z3dispatchi - Mangled symbol with argv) { dispatch(std::stoi(argv[1])); } 6 . 12SAVE LIBRARY/BINARY SAVE LIBRARY/BINARY MAIN.CPP MAIN.CPP LLC - LLC - #include // std::stoi void dispatch(int); // _Z3dispatchi - Mangled

— File: my function.cpp char const* my_function () { return "Hello from function!"; } — File: main.cpp #include #include int main () { std:: println("{}", my_function ()); hpp { return 42; }6/50 Including files twice does not work — File: a.hpp class A {}; — File: main.cpp #include #include // redefiniton error! int main () { }7/50 Included files private: char const* u_cant_touch_this () { return "Preprocessor hits me so hard"; } }; — File: main.cpp #define private public #include #undef private int main () { std:: println("{}", A{}

000 Lines!Includes 30 clang main.cpp -stdlib=libc++ -E &> prep_main.cpp $ du -bh main.cpp 82 main.cpp $ du -bh prep_main.cpp 2.9M prep_main.cppIncludes clang main.cpp -stdlib=libc++ -ftime-trace 31Includes int main() { std::cout << "Hello, world!" << std::endl; } 52 clang -I… -stdlib=libc++ main.cpp ������53545556Compiler Include Paths - Interacting with the filesystem is not free - Caches abound

} Assertion failed: (add( 1, 2 ) == 3), function main, file /Users/phil/Dev/Scratch/AddTest/main.cpp, line 8. Process finished with exit code 6#include int add( int a, int b ){ return } Assertion failed: (add( 1, 2 ) == 3), function main, file /Users/phil/Dev/Scratch/AddTest/main.cpp, line 8. Process finished with exit code 6#include int add( int a, int b ){ return } Assertion failed: (add( 1, 2 ) == 3), function main, file /Users/phil/Dev/Scratch/AddTest/main.cpp, line 8. Process finished with exit code 6#include int add( int a, int b ){ return

includes the add.hpp -- this is effectively the forward declaration being pasted in ○ Finally, the main.cpp ■ We #include “add.hpp” which gives us access to use add.cpp ■ So long as we link in the implementation includes the add.hpp -- this is effectively the forward declaration being pasted in ○ Finally, the main.cpp ■ We #include “add.hpp” which gives us access to use add.cpp ■ So long as we link in the implementation includes the add.hpp -- this is effectively the forward declaration being pasted in ○ Finally, the main.cpp ■ We #include “add.hpp” which gives us access to use add.cpp ■ So long as we link in the implementation

return value; } 43 . 1AFTER RELAXATION AFTER RELAXATION $ clang++ -Wconversion main.cpp $ clang++ -Wconversion main.cpp template > T find_missing_element(I no::seconds> v = {0s, 1s, 2s, 3s, 5s}; assert(min_absent(std::begin(v), std::end(v)) == 4s); main.cpp:17:14: error: no matching function for call to 'next' if (p == std::next(first, half)) { {T{0s}, T{1s}, T{2s}, T{3s}, T{5s}}; assert(min_absent(std::begin(v), std::end(v)) == T{4s}); main.cpp:16:28: error: no matching conversion for static_cast from 'const long' to 'std::chrono::time_p

conanbuildinfo.cmake example-hello conanfile.txt CMakeLists.txt # If using cmake, but can be Makefile, sln... main.cpp Now you are ready to build: $ cmake ../example-hello -G "Visual Studio 14 Win64" # or other generator cmake files example-hello conanfile.txt CMakeLists.txt # If using cmake, but can be Makefile, sln... main.cpp Now you can switch between your build configurations in exactly the same way you do for CMake or include(${CMAKE_BINARY_DIR}/conanbuildinfo_multi.cmake) conan_basic_setup() add_executable(say_hello main.cpp) foreach(_LIB ${CONAN_LIBS_RELEASE}) target_link_libraries(say_hello optimized ${_LIB}) endforeach()

conanbuildinfo.cmake example-hello conanfile.txt CMakeLists.txt # If using cmake, but can be Makefile, sln... main.cpp Now you are ready to build: $ cmake ../example-hello -G "Visual Studio 14 Win64" # or other generator cmake files example-hello conanfile.txt CMakeLists.txt # If using cmake, but can be Makefile, sln... main.cpp Now you can switch between your build configurations in exactly the same way you do for CMake or include(${CMAKE_BINARY_DIR}/conanbuildinfo_multi.cmake) conan_basic_setup() add_executable(say_hello main.cpp) foreach(_LIB ${CONAN_LIBS_RELEASE}) target_link_libraries(say_hello optimized ${_LIB}) endforeach()