GitLab

ebnf.EBNFCompiler and parsers.Grammar now raise errors when parsing rules can never be reached from the root parser

- syntaxtree.py: reversed parameter order in transformer-functions: node is now always the first paramter again.

- can use operators "+" (Sequence) and "|" (Alternative) for constructing parsers in Python; better testing suppoer

- Refactoring: AST-Transformation must now be passed as a function to full_compilation(), compileDSL etc. This allows more flexibility in doing
custom validation of the syntax tree before, after or while AST transformation.

- potential infinite loops are now caught when running parser and an error is reported; bug fixes, tests