Class: SyntaxTree::YARV::Legacy::GetClassVariable

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

Overview

### Summary

getclassvariable looks for a class variable in the current class and pushes its value onto the stack.

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

### Usage

~~~ruby @@class_variable ~~~

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Instruction

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

Constructor Details

#initialize(name) ⇒ GetClassVariable

Returns a new instance of GetClassVariable.



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# File 'lib/syntax_tree/yarv/legacy.rb', line 25

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 23

def name
  @name
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 41

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

#call(vm) ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 57

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

#canonical ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 53

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

#deconstruct_keys(_keys) ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 37

def deconstruct_keys(_keys)
  { name: name }
end

#disasm(fmt) ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 29

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

#length ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 45

def length
  2
end

#pushes ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 49

def pushes
  1
end

#to_a(_iseq) ⇒ Object 



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# File 'lib/syntax_tree/yarv/legacy.rb', line 33

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