Class: SyntaxTree::YARV::Jump

Inherits:
Instruction show all
Defined in:
lib/syntax_tree/yarv/instructions.rb

Overview

Summary

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

Usage

x = 0
if x == 0
  puts "0"
else
  puts "2"
end

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Instruction

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

Constructor Details

#initialize(label) ⇒ Jump

Returns a new instance of Jump.



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2220

def initialize(label)
  @label = label
end

Instance Attribute Details

#label ⇒ Object (readonly)

Returns the value of attribute label.



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2218

def label
  @label
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2236

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

#branch_targets ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2248

def branch_targets
  [label]
end

#call(vm) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2244

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

#deconstruct_keys(_keys) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2232

def deconstruct_keys(_keys)
  { label: label }
end

#disasm(fmt) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2224

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

#length ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2240

def length
  2
end

#to_a(_iseq) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2228

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