Class: SyntaxTree::YARV::SetConstant

Inherits:

Instruction

• Object
• Instruction
• SyntaxTree::YARV::SetConstant

Defined in:

lib/syntax_tree/yarv/instructions.rb

Overview

### Summary

‘setconstant` pops two values off the stack: the value to set the constant to and the constant base to set it in.

### Usage

~~~ruby Constant = 1 ~~~

Instance Attribute Summary

• #name ⇒ Object readonly

  Returns the value of attribute name.

Instance Method Summary

• #==(other) ⇒ Object
• #call(vm) ⇒ Object
• #deconstruct_keys(_keys) ⇒ Object
• #disasm(fmt) ⇒ Object
• #initialize(name) ⇒ SetConstant constructor

  A new instance of SetConstant.

• #length ⇒ Object
• #pops ⇒ Object
• #to_a(_iseq) ⇒ Object

Methods inherited from Instruction

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

Constructor Details

#initialize(name) ⇒ SetConstant

Returns a new instance of SetConstant.

# File 'lib/syntax_tree/yarv/instructions.rb', line 5015

def initialize(name)
  @name = name
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.

# File 'lib/syntax_tree/yarv/instructions.rb', line 5013

def name
  @name
end

Instance Method Details

#==(other) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 5031

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

#call(vm) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 5043

def call(vm)
  value, parent = vm.pop(2)
  parent.const_set(name, value)
end

#deconstruct_keys(_keys) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 5027

def deconstruct_keys(_keys)
  { name: name }
end

#disasm(fmt) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 5019

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

#length ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 5035

def length
  2
end

#pops ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 5039

def pops
  2
end

#to_a(_iseq) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 5023

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