NimbleParsec Testing

Mix.install([
  {:nimble_parsec, "~> 1.4"}
])

Time Parser

defmodule TimeParser do
  import NimbleParsec

  date =
    integer(4)
    |> ignore(string("-"))
    |> integer(2)
    |> ignore(string("-"))
    |> integer(2)

  time =
    integer(2)
    |> ignore(string(":"))
    |> integer(2)
    |> ignore(string(":"))
    |> integer(2)
    |> optional(string("Z"))

  defparsec(:datetime, tag(date, :date) |> ignore(string("T")) |> concat(tag(time, :time)))
end

TimeParser.datetime("2010-04-17T14:12:34Z")

AOC 2023 Day 1 Part 1

defmodule Day1 do
  import NimbleParsec

  digit = ascii_string([?0..?9], 1)

  number =
    choice([
      string("zero"),
      string("one"),
      string("two"),
      string("three"),
      string("four"),
      string("five"),
      string("six"),
      string("seven"),
      string("eight"),
      string("nine")
    ])

  letter = ascii_string([?a..?z], 1) |> ignore

  line = choice([number, digit, letter]) |> repeat |> ignore(string("\n"))

  defparsec(:parse, line |> repeat)
end

Day1.parse("""
1abc2
pqr3stu8vwx
a1b2c3d4e5f
treb7uchet
""")