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22 lines
569 B
22 lines
569 B
records = { SOI ~ record* ~ EOI }
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record = { begins_shift ~ sleep_ranges }
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begins_shift = { date ~ " Guard #" ~ guard_id ~ " begins shift" ~ eol }
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guard_id = { digit+ }
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sleep_ranges = { sleep_range* }
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sleep_range = { falls_asleep ~ wakes_up }
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falls_asleep = { date ~ " falls asleep" ~ eol }
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wakes_up = { date ~ " wakes up" ~ eol }
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date = _{ "[" ~ year ~ "-" ~ month ~ "-" ~ day ~ " " ~ hour ~ ":" ~ minute ~ "]" }
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year = _{ digit{4} }
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month = _{ digit{2} }
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day = _{ digit{2} }
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hour = _{ digit{2} }
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minute = { digit{2} }
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digit = _{ '0'..'9' }
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eol = _{ "\n" | EOI }
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