Class: SyntaxTree::YARV::SetGlobal

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

Overview

### Summary

setglobal sets the value of a global variable to a value popped off the top of the stack.

### Usage

~~~ruby $global = 5 ~~~

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Instruction

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

Constructor Details

#initialize(name) ⇒ SetGlobal 



5109
5110
5111
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 5109

def initialize(name)
  @name = name
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



5107
5108
5109
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 5107

def name
  @name
end

Instance Method Details

#==(other) ⇒ Object 



5125
5126
5127
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 5125

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

#call(vm) ⇒ Object 



5137
5138
5139
5140
5141
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 5137

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

#deconstruct_keys(_keys) ⇒ Object 



5121
5122
5123
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 5121

def deconstruct_keys(_keys)
  { name: name }
end

#disasm(fmt) ⇒ Object 



5113
5114
5115
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 5113

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

#length ⇒ Object 



5129
5130
5131
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 5129

def length
  2
end

#pops ⇒ Object 



5133
5134
5135
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 5133

def pops
  1
end

#to_a(_iseq) ⇒ Object 



5117
5118
5119
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 5117

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