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

~~~ruby 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 4819

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 4817

def object
  @object
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 4835

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 4847

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 4831

def deconstruct_keys(_keys)
  { object: object }
end

#disasm(fmt) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 4823

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

#length ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 4839

def length
  2
end

#pushes ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 4843

def pushes
  1
end

#to_a(_iseq) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 4827

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