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from __future__ import annotations
def split_index_msg(entry_type: str, value: str) -> list[str]:
# new entry types must be listed in util/nodes.py!
if entry_type == 'single':
try:
return _split_into(2, 'single', value)
except ValueError:
return _split_into(1, 'single', value)
if entry_type == 'pair':
return _split_into(2, 'pair', value)
if entry_type == 'triple':
return _split_into(3, 'triple', value)
if entry_type in {'see', 'seealso'}:
return _split_into(2, 'see', value)
msg = f'invalid {entry_type} index entry {value!r}'
raise ValueError(msg)
def _split_into(n: int, type: str, value: str) -> list[str]:
"""Split an index entry into a given number of parts at semicolons."""
parts = [x.strip() for x in value.split(';', n - 1)]
if len(list(filter(None, parts))) < n:
msg = f'invalid {type} index entry {value!r}'
raise ValueError(msg)
return parts
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