GitLab

- parser.py: bug: pos values not initialized in nodes in history record, in case root parser did not match

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

split compileEBNF into two functions: compileEBNF and compile_parser; adjustments for compatibility with pypy3 / python 3.5

moved code generation of factory functions from dsl.py to ebnf.py; finished testing function at the end of parser.py (not yet tested)

refactorings finished: a) logging is now more or less thread safe + context managers make logging control more flexible; b) factory functions now return (thread local) singleton parser and compiler objects c) compiler suites now rely on factory methods for more orthogonality

tests/test_syntaxtree.py to syntaxtree.py

- EXPERIMENTELLER Debugging-Code für den Aufrufer-Stapel der Parser in der left_recursion_guard()-Funktion.
- Refactoring, u.a. ParserRoot -> ParserHeadquarter
- compilierungsscripte für a) MLW-Grammatik b) MLW-Einträge mit dieser Grammatik
- Grammatik für MLW erweitert und Beispiel "facitergula.mlw" ausgebaut.