def parse_expr(txt: str, version: Optional[str] = None) -> E.Base: try: return _ExprTransformer(txt).transform(parse(txt, "expr", version)) except lark.exceptions.UnexpectedInput as exn: pos = SourcePosition( filename="(buffer)", line=getattr(exn, "line", "?"), column=getattr(exn, "column", "?"), end_line=getattr(exn, "line", "?"), end_column=getattr(exn, "column", "?"), ) raise Err.SyntaxError(pos, str(exn)) from None except lark.exceptions.VisitError as exn: raise exn.__context__
def parse_document(txt: str, version: Optional[str] = None, uri: str = "") -> D.Document: if version is None: # for now assume the version is 1.0 if the first line is "version <number>" # otherwise draft-2 version = "draft-2" for line in txt.split("\n"): line = line.strip() if line and line[0] != "#": if line.startswith("version ") and line[8].isdigit(): version = "1.0" break if not txt.strip(): return D.Document( SourcePosition(filename=uri, line=0, column=0, end_line=0, end_column=0), [], {}, [], None, ) try: return _DocTransformer(uri).transform(parse(txt, "document", version)) except lark.exceptions.UnexpectedInput as exn: pos = SourcePosition( filename=(uri if uri != "" else "(buffer)"), line=getattr(exn, "line", "?"), column=getattr(exn, "column", "?"), end_line=getattr(exn, "line", "?"), end_column=getattr(exn, "column", "?"), ) raise Err.SyntaxError(pos, str(exn)) from None except lark.exceptions.VisitError as exn: raise exn.__context__
def _check_keyword(pos, name): if name in _keywords: raise Err.SyntaxError(pos, "unexpected keyword {}".format(name))