Class: SyntaxTree::YARV::SetLocalWC0

Inherits:

Object

• Object
• SyntaxTree::YARV::SetLocalWC0

Defined in:

lib/syntax_tree/yarv/instructions.rb

Overview

### Summary

setlocal_WC_0 is a specialized version of the setlocal instruction. It sets the value of a local variable on the current frame to the value at the top of the stack as determined by the index given as its only argument.

### Usage

~~~ruby value = 5 ~~~

Instance Attribute Summary

• #index ⇒ Object readonly

  Returns the value of attribute index.

Instance Method Summary

• #call(vm) ⇒ Object
• #canonical ⇒ Object
• #disasm(fmt) ⇒ Object
• #initialize(index) ⇒ SetLocalWC0 constructor

  A new instance of SetLocalWC0.

• #length ⇒ Object
• #pops ⇒ Object
• #pushes ⇒ Object
• #to_a(iseq) ⇒ Object

Constructor Details

#initialize(index) ⇒ SetLocalWC0

# File 'lib/syntax_tree/yarv/instructions.rb', line 4884

def initialize(index)
  @index = index
end

Instance Attribute Details

#index ⇒ Object (readonly)

Returns the value of attribute index.

# File 'lib/syntax_tree/yarv/instructions.rb', line 4882

def index
  @index
end

Instance Method Details

#call(vm) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 4912

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

#canonical ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 4908

def canonical
  SetLocal.new(index, 0)
end

#disasm(fmt) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 4888

def disasm(fmt)
  fmt.instruction("setlocal_WC_0", [fmt.local(index, implicit: 0)])
end

#length ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 4896

def length
  2
end

#pops ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 4900

def pops
  1
end

#pushes ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 4904

def pushes
  0
end

#to_a(iseq) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 4892

def to_a(iseq)
  [:setlocal_WC_0, iseq.local_table.offset(index)]
end