Bison 3.3 released

Version 3.3 of the Bison parser generator is out."The new option --update replaces deprecated features with their modernspelling, but also applies fixes such as eliminating duplicate directives,etc. It is now possible to annotate rules with their number of expectedconflicts. Bison can be made relocatable. The symbol declaration syntaxwas overhauled, and in particular, %nterm, that exists since the origins ofBison, is now an officially supported (and documented!) feature. C++parsers now feature genuine symbol constructors, and use noexcept/constexpr.The GLR parsers in C++ now support the syntax_error exceptions. There arealso many smaller improvements, including a fix for a bug which is at least31 years old."