Class: SyntaxTree::YARV::Legacy::SetClassVariable

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

Overview

### Summary

setclassvariable looks for a class variable in the current class and sets its value to the value it pops off the top of the stack.

This version of the setclassvariable instruction is no longer used since in Ruby 3.0 it gained an inline cache.

### Usage

~~~ruby @@class_variable = 1 ~~~

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name) ⇒ SetClassVariable

Returns a new instance of SetClassVariable.



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# File 'lib/syntax_tree/yarv/legacy.rb', line 206

def initialize(name)
  @name = name
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/syntax_tree/yarv/legacy.rb', line 204

def name
  @name
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 222

def ==(other)
  other.is_a?(SetClassVariable) && other.name == name
end

#call(vm) ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 242

def call(vm)
  canonical.call(vm)
end

#canonical ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 238

def canonical
  YARV::SetClassVariable.new(name, nil)
end

#deconstruct_keys(_keys) ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 218

def deconstruct_keys(_keys)
  { name: name }
end

#disasm(fmt) ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 210

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

#length ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 226

def length
  2
end

#pops ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 230

def pops
  1
end

#pushes ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 234

def pushes
  0
end

#to_a(_iseq) ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 214

def to_a(_iseq)
  [:setclassvariable, name]
end