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minipeg

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A simple easy to debug macro free peg parser library

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minipeg lib minipeg combinators common.ex
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lib/minipeg/combinators/common.ex 

defmodule Minipeg.Combinators.Common do

  @moduledoc false



  alias Minipeg.{Input, Parser, Types}

  use Types

  import Parser, only: [new: 2, parse: 3]



  @spec ignore_ws(Parser.t, binary?(), boolean()) :: Parser.t

  def ignore_ws(parser, name \\ nil, skip_newlines \\ false) do

    name1 = name || "ignore_ws"

    new(

      name1,

      fn input, cache, _ ->

        {next, input1} = Input.take(input)

        # IO.inspect(input1)

        case next do

          "" -> parse(parser, input, cache)

          " " -> parse(ignore_ws(parser, name1, skip_newlines), input1, cache)

          "\t" -> parse(ignore_ws(parser, name1, skip_newlines), input1, cache)

          "\n" when skip_newlines -> parse(ignore_ws(parser, name1, skip_newlines), input1, cache)

          _ -> parse(parser, input, cache)

        end

      end

    )

  end

end

# SPDX-License-Identifier: Apache-2.0