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 181

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 179

def name
  @name
end

Instance Method Details

#call(vm) ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 209

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

#canonical ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 205

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

#disasm(fmt) ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 185

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

#length ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 193

def length
  2
end

#pops ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 197

def pops
  1
end

#pushes ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 201

def pushes
  0
end

#to_a(_iseq) ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 189

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