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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 failure.ex
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lib/minipeg/failure.ex 

defmodule Minipeg.Failure do

  alias Minipeg.{Cache, Input}



  @moduledoc ~S"""

  A failure result

  """



  defstruct cache: %Cache{}, input: %Input{}, reason: ""



  @type t :: %__MODULE__{cache: Cache.t(), input: Input.t(), reason: binary()}



  @spec fail(binary(), Input.t(), Cache.t()) :: t

  def fail(reason, input, cache) do

    %__MODULE__{cache: cache, input: input, reason: reason}

  end



  @spec format(t()) :: binary()

  def format(%__MODULE__{input: input, reason: reason}) do

    _format(input, reason, Map.get(input, :context, %{}))

  end



  @spec _format(Input.t(), binary(), map()) :: binary()

  defp _format(input, reason, context) do

    source_name = Map.get(context, :source_name, "<binary>")

    "#{reason} #{source_name}:#{Input.report_position(input)}"

  end

end



# SPDX-License-Identifier: Apache-2.0