Rob and Jason are joined by Piotr Winter. They first talk about include guards vs pragma once, testing for constexpr and the preview of Catch v3. Then they talk to Piotr Winter about CTPG, the C++ Compile Time Parser Generator.     News Include guards or #pragma once Test an expression for constexpr friendliness Catch v3 Preview 4 Links C++ Compile Time Parser Generator Peter Winter's Blog Sponsors Indicate the #cppcast hashtag and request your PVS-Studio one-month trial license here https://pvs-studio.com/try_free C++ tools evolution: static code analyzers: https://pvs-studio.com/0873