Grammars written for ANTLR v4; expectation that the grammars are free of actions.
ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files. https://github.com/antlr/antlr4
Modern C++ Tutorial: C++11/14/17/20 On the Fly | https://changkun.de/modern-cpp/ https://github.com/changkun/modern-cpp-tutorial
