Class: SyntaxTree::YARV::PutSpecialObject

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

Overview

Summary

putspecialobject pushes one of three special objects onto the stack. These are either the VM core special object, the class base special object, or the constant base special object.

Usage

alias foo bar

Constant Summary collapse

OBJECT_VMCORE = 
1
OBJECT_CBASE = 
2
OBJECT_CONST_BASE = 
3

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Instruction

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

Constructor Details

#initialize(object) ⇒ PutSpecialObject

Returns a new instance of PutSpecialObject.



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# File 'lib/syntax_tree/yarv/instructions.rb', line 4720

def initialize(object)
  @object = object
end

Instance Attribute Details

#object ⇒ Object (readonly)

Returns the value of attribute object.



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# File 'lib/syntax_tree/yarv/instructions.rb', line 4718

def object
  @object
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 4736

def ==(other)
  other.is_a?(PutSpecialObject) && other.object == object
end

#call(vm) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 4748

def call(vm)
  case object
  when OBJECT_VMCORE
    vm.push(vm.frozen_core)
  when OBJECT_CBASE
    value = vm.frame._self
    value = value.singleton_class unless value.is_a?(Class)
    vm.push(value)
  when OBJECT_CONST_BASE
    vm.push(vm.const_base)
  end
end

#deconstruct_keys(_keys) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 4732

def deconstruct_keys(_keys)
  { object: object }
end

#disasm(fmt) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 4724

def disasm(fmt)
  fmt.instruction("putspecialobject", [fmt.object(object)])
end

#length ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 4740

def length
  2
end

#pushes ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 4744

def pushes
  1
end

#to_a(_iseq) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 4728

def to_a(_iseq)
  [:putspecialobject, object]
end