class SyntaxTree::YARV::DupN

### Summary

‘dupn` duplicates the top `n` stack elements.

### Usage

~~~ruby Object::X ||= true ~~~

Source

# File lib/syntax_tree/yarv/instructions.rb, line 1398
def initialize(number)
  @number = number
end

Source

# File lib/syntax_tree/yarv/instructions.rb, line 1414
def ==(other)
  other.is_a?(DupN) && other.number == number
end

Source

# File lib/syntax_tree/yarv/instructions.rb, line 1426
def call(vm)
  values = vm.pop(number)
  vm.push(*values)
  vm.push(*values)
end

Source

# File lib/syntax_tree/yarv/instructions.rb, line 1410
def deconstruct_keys(_keys)
  { number: number }
end

Source

# File lib/syntax_tree/yarv/instructions.rb, line 1402
def disasm(fmt)
  fmt.instruction("dupn", [fmt.object(number)])
end

Source

# File lib/syntax_tree/yarv/instructions.rb, line 1418
def length
  2
end

Source

# File lib/syntax_tree/yarv/instructions.rb, line 1422
def pushes
  number
end

Source

# File lib/syntax_tree/yarv/instructions.rb, line 1406
def to_a(_iseq)
  [:dupn, number]
end