mix nimble_parsec.compile (NimbleParsec v1.1.0) View Source

Compiles a parser from a template.

mix nimble_parsec.compile template.ex.exs

This task is useful to generate parsers that have no runtime dependency on NimbleParsec.

Examples

Let's define a template file:

# lib/my_parser.ex.exs
defmodule MyParser do
  @moduledoc false

  # parsec:MyParser
  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, date |> ignore(string("T")) |> concat(time)

  # parsec:MyParser
end

After running:

mix nimble_parsec.compile lib/my_parser.ex.exs

The following file will be generated:

# lib/my_parser.ex
defmodule MyParser do
  @moduledoc false

  def datetime(binary, opts \\ []) do
    ...
  end

  defp datetime__0(...) do
    ...
  end

  ...
end

The file will be automatically formatted if using Elixir v1.6+.

Options

• -o - configures the output location. Defaults to the input file without its last extension