Class: SyntaxTree::YARV::Jump

Inherits:

Object

• Object
• SyntaxTree::YARV::Jump

Defined in:

lib/syntax_tree/yarv/instructions.rb

Overview

### Summary

jump unconditionally jumps to the label given as its only argument.

### Usage

~~~ruby x = 0 if x == 0

puts "0"

else

puts "2"

end ~~~

Instance Attribute Summary

• #label ⇒ Object readonly

  Returns the value of attribute label.

Instance Method Summary

• #call(vm) ⇒ Object
• #canonical ⇒ Object
• #disasm(fmt) ⇒ Object
• #initialize(label) ⇒ Jump constructor

  A new instance of Jump.

• #length ⇒ Object
• #pops ⇒ Object
• #pushes ⇒ Object
• #to_a(_iseq) ⇒ Object

Constructor Details

#initialize(label) ⇒ Jump

Returns a new instance of Jump.

# File 'lib/syntax_tree/yarv/instructions.rb', line 2096

def initialize(label)
  @label = label
end

Instance Attribute Details

#label ⇒ Object (readonly)

Returns the value of attribute label.

# File 'lib/syntax_tree/yarv/instructions.rb', line 2094

def label
  @label
end

Instance Method Details

#call(vm) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2124

def call(vm)
  vm.jump(label)
end

#canonical ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2120

def canonical
  self
end

#disasm(fmt) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2100

def disasm(fmt)
  fmt.instruction("jump", [fmt.label(label)])
end

#length ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2108

def length
  2
end

#pops ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2112

def pops
  0
end

#pushes ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2116

def pushes
  0
end

#to_a(_iseq) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2104

def to_a(_iseq)
  [:jump, label.name]
end