Class: SyntaxTree::YARV::OptLTLT

Inherits:

Object

• Object
• SyntaxTree::YARV::OptLTLT

Defined in:

lib/syntax_tree/yarv/instructions.rb

Overview

### Summary

opt_ltlt is a specialization of the opt_send_without_block instruction that occurs when the ‘<<` operator is used. Fast paths exists when the receiver is either a String or an Array. It pops both the receiver and the argument off the stack and pushes on the result.

### Usage

~~~ruby “” << 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) ⇒ OptLTLT constructor

  A new instance of OptLTLT.

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

Constructor Details

#initialize(calldata) ⇒ OptLTLT

# File 'lib/syntax_tree/yarv/instructions.rb', line 3293

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 3291

def calldata
  @calldata
end

Instance Method Details

#call(vm) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 3321

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

#canonical ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 3317

def canonical
  Send.new(calldata, nil)
end

#disasm(fmt) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 3297

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

#length ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 3305

def length
  2
end

#pops ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 3309

def pops
  2
end

#pushes ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 3313

def pushes
  1
end

#to_a(_iseq) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 3301

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