Class: SyntaxTree::YARV::OptEq

Inherits:

Object

• Object
• SyntaxTree::YARV::OptEq

Defined in:

lib/syntax_tree/yarv/instructions.rb

Overview

### Summary

opt_eq is a specialization of the opt_send_without_block instruction that occurs when the == operator is used. Fast paths exist when both operands are integers, floats, symbols or strings. It pops both the receiver and the argument off the stack and pushes on the result.

### Usage

~~~ruby 2 == 2 ~~~

Instance Attribute Summary

• #calldata ⇒ Object readonly

  Returns the value of attribute calldata.

Instance Method Summary

• #call(vm) ⇒ Object
• #canonical ⇒ Object
• #disasm(fmt) ⇒ Object
• #initialize(calldata) ⇒ OptEq constructor

  A new instance of OptEq.

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

Constructor Details

#initialize(calldata) ⇒ OptEq

# File 'lib/syntax_tree/yarv/instructions.rb', line 2943

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 2941

def calldata
  @calldata
end

Instance Method Details

#call(vm) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2971

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

#canonical ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2967

def canonical
  Send.new(calldata, nil)
end

#disasm(fmt) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2947

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

#length ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2955

def length
  2
end

#pops ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2959

def pops
  2
end

#pushes ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2963

def pushes
  1
end

#to_a(_iseq) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2951

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