Class: SyntaxTree::YARV::OptEmptyP

Inherits:

Object

• Object
• SyntaxTree::YARV::OptEmptyP

Defined in:

lib/syntax_tree/yarv/instructions.rb

Overview

### Summary

opt_empty_p is an optimization applied when the method empty? is called. It pops the receiver off the stack and pushes on the result of the method call.

### Usage

~~~ruby “”.empty? ~~~

Instance Attribute Summary

• #calldata ⇒ Object readonly

  Returns the value of attribute calldata.

Instance Method Summary

• #==(other) ⇒ Object
• #call(vm) ⇒ Object
• #canonical ⇒ Object
• #deconstruct_keys(_keys) ⇒ Object
• #disasm(fmt) ⇒ Object
• #initialize(calldata) ⇒ OptEmptyP constructor

  A new instance of OptEmptyP.

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

Constructor Details

#initialize(calldata) ⇒ OptEmptyP

# File 'lib/syntax_tree/yarv/instructions.rb', line 3294

def initialize(calldata)
  @calldata = calldata
end

Instance Attribute Details

#calldata ⇒ Object (readonly)

Returns the value of attribute calldata.

# File 'lib/syntax_tree/yarv/instructions.rb', line 3292

def calldata
  @calldata
end

Instance Method Details

#==(other) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 3310

def ==(other)
  other.is_a?(OptEmptyP) && other.calldata == calldata
end

#call(vm) ⇒ Object

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

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

#canonical ⇒ Object

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

def canonical
  Send.new(calldata, nil)
end

#deconstruct_keys(_keys) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 3306

def deconstruct_keys(_keys)
  { calldata: calldata }
end

#disasm(fmt) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 3298

def disasm(fmt)
  fmt.instruction("opt_empty_p", [fmt.calldata(calldata)])
end

#length ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 3314

def length
  2
end

#pops ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 3318

def pops
  1
end

#pushes ⇒ Object

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

def pushes
  1
end

#to_a(_iseq) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 3302

def to_a(_iseq)
  [:opt_empty_p, calldata.to_h]
end