class Erlang::ETF::List

| 1 | 4 | | | | — | —— | ——– | —- | | 108 | Length | Elements | Tail |

`Length` is the number of elements that follows in the `Elements` section. `Tail` is the final tail of the list; it is [`NIL_EXT`] for a proper list, but may be anything type if the list is improper (for instance `[a|b]`).

(see [`LIST_EXT`])

[`NIL_EXT`]: erlang.org/doc/apps/erts/erl_ext_dist.html#NIL_EXT [`LIST_EXT`]: erlang.org/doc/apps/erts/erl_ext_dist.html#LIST_EXT

Constants

UINT32BE

Public Class Methods

[](term, elements = nil, tail = nil) click to toggle source
# File lib/erlang/etf/list.rb, line 25
def [](term, elements = nil, tail = nil)
  return term if term.kind_of?(Erlang::ETF::Term)
  term = Erlang.from(term)
  return new(term, elements, tail)
end
erlang_load(buffer) click to toggle source
# File lib/erlang/etf/list.rb, line 31
def erlang_load(buffer)
  length, = buffer.read(4).unpack(UINT32BE)
  elements = Array.new(length)
  length.times { |i| elements[i] = Erlang::ETF.read_term(buffer) }
  tail = Erlang::ETF.read_term(buffer)
  return tail if length == 0
  list = Erlang::List.from_enum(elements) + tail
  return new(list, elements, tail)
end
new(term, elements = nil, tail = nil) click to toggle source
# File lib/erlang/etf/list.rb, line 42
def initialize(term, elements = nil, tail = nil)
  raise ArgumentError, "term must be of any type" if not Erlang.is_any(term)
  @term = term
  @elements = elements.freeze
  @tail = tail.freeze
end

Public Instance Methods

erlang_dump(buffer = ::String.new.force_encoding(BINARY_ENCODING)) click to toggle source
# File lib/erlang/etf/list.rb, line 49
def erlang_dump(buffer = ::String.new.force_encoding(BINARY_ENCODING))
  buffer << LIST_EXT
  elements = nil
  tail = nil
  if not Erlang.is_list(term)
    elements = @elements || []
    tail = @tail || @term
  else
    elements = @elements || (@term.improper? ? @term.to_proper_list : @term)
    tail = @tail || (@term.improper? ? @term.last(true) : Erlang::Nil)
  end
  length = elements.size
  buffer << [length].pack(UINT32BE)
  elements.each { |element| Erlang::ETF.write_term(element, buffer) }
  Erlang::ETF.write_term(tail, buffer)
  return buffer
end
inspect() click to toggle source
Calls superclass method Erlang::ETF::Term#inspect
# File lib/erlang/etf/list.rb, line 67
def inspect
  if @elements.nil? and @tail.nil?
    return super
  else
    return "#{self.class}[#{@term.inspect}, #{@elements.inspect}, #{@tail.inspect}]"
  end
end
pretty_print(pp) click to toggle source
# File lib/erlang/etf/list.rb, line 75
def pretty_print(pp)
  state = [@term]
  state.push(@elements, @tail) if not @elements.nil? or not @tail.nil?
  return pp.group(1, "#{self.class}[", "]") do
    pp.breakable ''
    pp.seplist(state) { |obj| obj.pretty_print(pp) }
  end
end