Class: SyntaxTree::YARV::OptGetConstantPath

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

Overview

### Summary

‘opt_getconstant_path` performs a constant lookup on a chain of constant names. It accepts as its argument an array of constant names, and pushes the value of the constant onto the stack.

### Usage

~~~ruby ::Object ~~~

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Instruction

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

Constructor Details

#initialize(names) ⇒ OptGetConstantPath

Returns a new instance of OptGetConstantPath.



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3313

def initialize(names)
  @names = names
end

Instance Attribute Details

#names ⇒ Object (readonly)

Returns the value of attribute names.



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3311

def names
  @names
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3330

def ==(other)
  other.is_a?(OptGetConstantPath) && other.names == names
end

#call(vm) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3342

def call(vm)
  current = vm.frame._self
  current = current.class unless current.is_a?(Class)

  names.each do |name|
    current = name == :"" ? Object : current.const_get(name)
  end

  vm.push(current)
end

#deconstruct_keys(_keys) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3326

def deconstruct_keys(_keys)
  { names: names }
end

#disasm(fmt) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3317

def disasm(fmt)
  cache = "<ic:0 #{names.join("::")}>"
  fmt.instruction("opt_getconstant_path", [cache])
end

#length ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3334

def length
  2
end

#pushes ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3338

def pushes
  1
end

#to_a(_iseq) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3322

def to_a(_iseq)
  [:opt_getconstant_path, names]
end