Module: Cyclotone::MiniNotation::AST

Defined in:

lib/cyclotone/mini_notation/ast.rb

Defined Under Namespace

Classes: Alternating, Atom, Choice, Degrade, Elongate, Euclidean, Node, Polymetric, Repeat, Replicate, Rest, Sequence, Slow, Stack

Class Method Summary

• .to_source(node) ⇒ Object

Class Method Details

.to_source(node) ⇒ Object

# File 'lib/cyclotone/mini_notation/ast.rb', line 229

def to_source(node)
  case node
  when Atom
    node.sample ? "#{format_atom(node.value)}:#{node.sample}" : format_atom(node.value)
  when Rest
    "~"
  when Sequence
    node.elements.map { |element| to_source(element) }.join(" ")
  when Stack
    "[#{node.patterns.map { |pattern| to_source(pattern) }.join(", ")}]"
  when Alternating
    "<#{node.patterns.map { |pattern| to_source(pattern) }.join(" ")}>"
  when Repeat
    "#{group_if_needed(node.pattern)}*#{node.count}"
  when Replicate
    "#{group_if_needed(node.pattern)}!#{node.count}"
  when Slow
    "#{group_if_needed(node.pattern)}/#{node.amount}"
  when Elongate
    "#{group_if_needed(node.pattern)}@#{node.amount}"
  when Degrade
    "#{group_if_needed(node.pattern)}?#{node.probability}"
  when Choice
    node.patterns.map { |pattern| to_source(pattern) }.join(" | ")
  when Euclidean
    "#{group_if_needed(node.pattern)}(#{node.pulses},#{node.steps},#{node.rotation})"
  when Polymetric
    suffix = node.steps ? "%#{node.steps}" : ""
    "{#{node.patterns.map { |pattern| to_source(pattern) }.join(", ")}}#{suffix}"
  else
    raise ArgumentError, "unsupported AST node #{node.class}"
  end
end