Class: Nl::DataTypes::Struct

Inherits:
Base
  • Object
show all
Defined in:
nl/lib/nl/datatypes.rb

Instance Method Summary collapse

Methods inherited from Base

#nlattr_type_flags

Constructor Details

#initialize(type, check: nil, consume_remaining: false) ⇒ Struct

Returns a new instance of Struct.



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# File 'nl/lib/nl/datatypes.rb', line 153

def initialize(type, check: nil, consume_remaining: false)
  super(check:)
  @type = type
  @consume_remaining = consume_remaining
end

Instance Method Details

#coerce(value, context: nil) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'nl/lib/nl/datatypes.rb', line 159

def coerce(value, context: nil)
  return value unless value.is_a?(Hash)

  unknown = value.keys - @type::MEMBERS.keys
  raise ArgumentError, "unknown struct members: #{unknown.join(', ')}" unless unknown.empty?

  @type.new(*@type::MEMBERS.map { |name, datatype| datatype.coerce(value[name], context:) })
end

#decode(decoder, context: nil, nlattr_type_flags: 0) ⇒ Object 



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# File 'nl/lib/nl/datatypes.rb', line 182

def decode(decoder, context: nil, nlattr_type_flags: 0)
  unless @check
    value = @type.decode(decoder)
    decoder.skip if @consume_remaining
    return value
  end

  payload = checked(decoder.get_string)
  nested = Decoder.new(IO::Buffer.for(payload))
  nested.limit(payload.bytesize) do
    value = @type.decode(it)
    it.skip if @consume_remaining
    value
  end
end

#encode(encoder, value, context: nil) ⇒ Object 



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# File 'nl/lib/nl/datatypes.rb', line 168

def encode(encoder, value, context: nil)
  unless value.is_a?(@type)
    raise TypeError, "value must be an instance of #{@type}"
  end

  if @check
    temporary = Encoder.new
    value.encode(temporary)
    encoder.put_string(checked(temporary.buffer.get_string))
  else
    value.encode(encoder)
  end
end