class BinData::DSLMixin::DSLFieldParser

def initialize(hints, symbol, *args, &block)
  @hints  = hints
  @type   = symbol
  @name   = name_from_field_declaration(args)
  @params = params_from_field_declaration(args, &block)
end

def name_from_field_declaration(args)
  name, _ = args
  if name == "" || name.is_a?(Hash)
    nil
  else
    name
  end
end

def params_from_args(args)
  name, params = args
  params = name if name.is_a?(Hash)
  params || {}
end

def params_from_block(&block)
  bindata_classes = {
    array:      BinData::Array,
    buffer:     BinData::Buffer,
    choice:     BinData::Choice,
    delayed_io: BinData::DelayedIO,
    skip:       BinData::Skip,
    struct:     BinData::Struct,
  }
  if bindata_classes.include?(@type)
    parser = DSLParser.new(bindata_classes[@type], @type)
    parser.endian(@hints[:endian])
    parser.search_prefix(*@hints[:search_prefix])
    parser.instance_eval(&block)
    parser.dsl_params
  else
    {}
  end
end

def params_from_field_declaration(args, &block)
  params = params_from_args(args)
  if block_given?
    params.merge(params_from_block(&block))
  else
    params
  end
end