Unwrapping (~) not supported in CDDL

[dgpetrie]

CDDL RFC 8610 section 3.7. Unwrapping defines the use of the tilde (~) character operator for unwrapping a map. When zcbor encounters a tilda in the CDDL it throws an exception.

import zcbor cddl_str = """ second_type = { ~ first_type, param3: uint, }

first_type = { param1: tstr, param2: uint } """ cddl_res = zcbor.zcbor.zcbor.DataTranslator.from_cddl(cddl_str, 100)

yields:

Traceback (most recent call last): File "/usr/local/lib/python3.8/dist-packages/zcbor/zcbor/zcbor.py", line 903, in get_value handler(self, match_str) File "/usr/local/lib/python3.8/dist-packages/zcbor/zcbor/zcbor.py", line 775, in lambda m_self, map_str: m_self.type_and_value( File "/usr/local/lib/python3.8/dist-packages/zcbor/zcbor/zcbor.py", line 530, in type_and_value self.set_value(value_generator) File "/usr/local/lib/python3.8/dist-packages/zcbor/zcbor/zcbor.py", line 533, in set_value value = value_generator() File "/usr/local/lib/python3.8/dist-packages/zcbor/zcbor/zcbor.py", line 776, in "MAP", lambda: m_self.parse(map_str))), File "/usr/local/lib/python3.8/dist-packages/zcbor/zcbor/zcbor.py", line 990, in parse instr = value.get_value(instr) File "/usr/local/lib/python3.8/dist-packages/zcbor/zcbor/zcbor.py", line 914, in get_value raise TypeError("Could not parse this: '%s'" % instr) TypeError: Could not parse this: '~ first_type, param3: uint,'

The above exception was the direct cause of the following exception:

Traceback (most recent call last): File "", line 1, in File "/usr/local/lib/python3.8/dist-packages/zcbor/zcbor/zcbor.py", line 281, in from_cddl parsed.get_value(cddl_string.replace("\n", " ").lstrip("&")) File "/usr/local/lib/python3.8/dist-packages/zcbor/zcbor/zcbor.py", line 905, in get_value raise Exception("Failed while parsing this: '%s'" % match_str) from e Exception: Failed while parsing this: ' ~ first_type, param3: uint, '

[oyvindronningstad]

Thanks for reporting. Unwrapping is one of the features mentioned as unsupported in the release notes. I will note this down as a request so I'm more likely to implement it.