Parsing Expression Grammar Template Library (PEGTL) 4.0.0 Released

Hello, version 4.0.0 of the PEGTL has been released!

For those not familiar, let me quote the first sentence of the documentation: "The Parsing Expression Grammar Template Library (PEGTL) is a zero-dependency C++ header-only parser combinator library for creating parsers according to a Parsing Expression Grammar (PEG)."

The basics are still the same, grammars are implemented in C++ with nested template instantiations, however a lot has also changed. Some highlights:

* Switched to Boost Software License
* A bunch of new parsing rules and actions.
* The inputs have been rewritten from scratch.
* Nested exceptions are used for nested parsing errors.
* Native support for parsing sequences of arbitrary objects.

This is the last major version that will stick with C++17.

Repository page: https://github.com/taocpp/PEGTL

Release page: https://github.com/taocpp/PEGTL/releases/tag/4.0.0

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