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.



4766
4767
4768
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4766

def initialize(object)
  @object = object
end

Instance Attribute Details

#object ⇒ Object (readonly)

Returns the value of attribute object.



4764
4765
4766
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4764

def object
  @object
end

Instance Method Details

#==(other) ⇒ Object 



4782
4783
4784
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4782

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

#call(vm) ⇒ Object 



4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4794

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 



4778
4779
4780
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4778

def deconstruct_keys(_keys)
  { object: object }
end

#disasm(fmt) ⇒ Object 



4770
4771
4772
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4770

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

#length ⇒ Object 



4786
4787
4788
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4786

def length
  2
end

#pushes ⇒ Object 



4790
4791
4792
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4790

def pushes
  1
end

#to_a(_iseq) ⇒ Object 



4774
4775
4776
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4774

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