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The hour unit has one home and it carries the dative plural (V-609)

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"напомни к двум часам позвонить маме" now reads two o'clock. It read no
time at all, so the reminder reached the daemon with an empty slot and she
asked the open "Когда?" about an hour he had just said.

The word that lost it was "часам", the dative plural of "час". Four sets in
internal/router listed the hour noun and every one of them stopped at
"часу". They are now one lexicon key, hour_units, read by all four through
lexicon.HourUnits and lexicon.IsHourUnit. The minute noun had the same gap
one word over and gets the same treatment in minute_units: "минутам" was
missing everywhere "минут" and "минуты" were present. The slot_value_frame
set no longer lists either noun and appends both, so there is one copy of
each closed class rather than a copy per caller.

Two more sites had to move for the sentence to parse. hourPrepositions knew
"в", "во" and "на" and not "к", and the python dateparser rewrite knew the
same three. Both now read the fifth preposition and the oblique forms of the
hour that follow it.

Fixture unchanged: classifier+hash 27/91 before and after, reach 18/30
before and after, no case moved in either direction.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
claude
2026-08-06 03:51:06 +04:00
parent bf2587c7fa
commit 580959f856
7 changed files with 176 additions and 28 deletions
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internal/router/dateparser.go
+7 -5
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@@ -45,10 +45,10 @@ try:
now = datetime.fromisoformat(sys.argv[2])
# Pre-process: replace Russian time qualifiers with AM/PM.
# Handles "9 утра", "10 часов утра", "3 часа дня" etc.
text = re.sub(r'(\d+)\s+(?:час(?:а|ов)?\s+)?утра\b', r'\1 am', text, flags=re.IGNORECASE)
text = re.sub(r'(\d+)\s+(?:час(?:а|ов)?\s+)?вечера\b', r'\1 pm', text, flags=re.IGNORECASE)
text = re.sub(r'(\d+)\s+(?:час(?:а|ов)?\s+)?дня\b', r'\1 pm', text, flags=re.IGNORECASE)
text = re.sub(r'(\d+)\s+(?:час(?:а|ов)?\s+)?ночи\b', r'\1 am', text, flags=re.IGNORECASE)
text = re.sub(r'(\d+)\s+(?:час(?:а|ов|у|ам)?\s+)?утра\b', r'\1 am', text, flags=re.IGNORECASE)
text = re.sub(r'(\d+)\s+(?:час(?:а|ов|у|ам)?\s+)?вечера\b', r'\1 pm', text, flags=re.IGNORECASE)
text = re.sub(r'(\d+)\s+(?:час(?:а|ов|у|ам)?\s+)?дня\b', r'\1 pm', text, flags=re.IGNORECASE)
text = re.sub(r'(\d+)\s+(?:час(?:а|ов|у|ам)?\s+)?ночи\b', r'\1 am', text, flags=re.IGNORECASE)
# A bare hour after a preposition is dropped on the floor by dateparser:
# "завтра в 7" resolves to tomorrow at the CURRENT clock, and "завтра в 7
# часов" is read as seven hours from now. Only a qualifier (already an
@@ -56,7 +56,9 @@ try:
# English "at 7" fails identically, so both prepositions are rewritten.
# "на 9" is the same hour said with the other preposition, and it was not
# read at all until V-579: "в 9" set the reminder and "на 9" did not.
text = re.sub(r'(?<![\w:])(в|во|на|at)\s+([01]?\d|2[0-3])(?:\s+час(?:а|ов)?)?(?![\d:.\w])',
# "к двум часам" is a third preposition and the dative that goes with it,
# and it was read as no time at all until V-609.
text = re.sub(r'(?<![\w:])(в|во|на|к|ко|at|by)\s+([01]?\d|2[0-3])(?:\s+час(?:а|ов|у|ам)?)?(?![\d:.\w])',
lambda m: '%s %02d:00' % (m.group(1), int(m.group(2))), text, flags=re.IGNORECASE)
settings = {'PREFER_DATES_FROM': 'future', 'RELATIVE_BASE': now}
# Two-step: search_dates finds the date substring in text,