Class: SyntaxTree::YARV::Jump

Inherits:

Instruction

• Object
• Instruction
• 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

• #==(other) ⇒ Object
• #branch_targets ⇒ Object
• #call(vm) ⇒ Object
• #deconstruct_keys(_keys) ⇒ Object
• #disasm(fmt) ⇒ Object
• #initialize(label) ⇒ Jump constructor

  A new instance of Jump.

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

Methods inherited from Instruction

#canonical, #falls_through?, #leaves?, #pops, #pushes, #side_effects?

Constructor Details

#initialize(label) ⇒ Jump

Returns a new instance of Jump.

# File 'lib/syntax_tree/yarv/instructions.rb', line 2162

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 2160

def label
  @label
end

Instance Method Details

#==(other) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2178

def ==(other)
  other.is_a?(Jump) && other.label == label
end

#branch_targets ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2190

def branch_targets
  [label]
end

#call(vm) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2186

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

#deconstruct_keys(_keys) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2174

def deconstruct_keys(_keys)
  { label: label }
end

#disasm(fmt) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2166

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

#length ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2182

def length
  2
end

#to_a(_iseq) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2170

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