Class: SyntaxTree::YARV::GetGlobal

Inherits:

Instruction

• Object
• Instruction
• SyntaxTree::YARV::GetGlobal

Defined in:

lib/syntax_tree/yarv/instructions.rb

Overview

### Summary

‘getglobal` pushes the value of a global variables onto the stack.

### Usage

~~~ruby $$ ~~~

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) ⇒ GetGlobal constructor

  A new instance of GetGlobal.

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

Methods inherited from Instruction

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

Constructor Details

#initialize(name) ⇒ GetGlobal

Returns a new instance of GetGlobal.

# File 'lib/syntax_tree/yarv/instructions.rb', line 1773

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 1771

def name
  @name
end

Instance Method Details

#==(other) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 1789

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

#call(vm) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 1801

def call(vm)
  # Evaluating the name of the global variable because there isn't a
  # reflection API for global variables.
  vm.push(eval(name.to_s, binding, __FILE__, __LINE__))
end

#deconstruct_keys(_keys) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 1785

def deconstruct_keys(_keys)
  { name: name }
end

#disasm(fmt) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 1777

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

#length ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 1793

def length
  2
end

#pushes ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 1797

def pushes
  1
end

#to_a(_iseq) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 1781

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