Class: SyntaxTree::YARV::OptArefWith

Inherits:

Instruction

• Object
• Instruction
• SyntaxTree::YARV::OptArefWith

Defined in:

lib/syntax_tree/yarv/instructions.rb

Overview

### Summary

‘opt_aref_with` is a specialization of the `opt_aref` instruction that occurs when the `[]` operator is used with a string argument known at compile time. There are fast paths if the receiver is a hash. It pops the receiver off the stack and pushes on the result.

### Usage

~~~ruby ‘test’ => true ~~~

Instance Attribute Summary

• #calldata ⇒ Object readonly

  Returns the value of attribute calldata.

• #object ⇒ Object readonly

  Returns the value of attribute object.

Instance Method Summary

• #==(other) ⇒ Object
• #call(vm) ⇒ Object
• #deconstruct_keys(_keys) ⇒ Object
• #disasm(fmt) ⇒ Object
• #initialize(object, calldata) ⇒ OptArefWith constructor

  A new instance of OptArefWith.

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

Methods inherited from Instruction

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

Constructor Details

#initialize(object, calldata) ⇒ OptArefWith

Returns a new instance of OptArefWith.

# File 'lib/syntax_tree/yarv/instructions.rb', line 2726

def initialize(object, calldata)
  @object = object
  @calldata = calldata
end

Instance Attribute Details

#calldata ⇒ Object (readonly)

Returns the value of attribute calldata.

# File 'lib/syntax_tree/yarv/instructions.rb', line 2724

def calldata
  @calldata
end

#object ⇒ Object (readonly)

Returns the value of attribute object.

# File 'lib/syntax_tree/yarv/instructions.rb', line 2724

def object
  @object
end

Instance Method Details

#==(other) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2746

def ==(other)
  other.is_a?(OptArefWith) && other.object == object &&
    other.calldata == calldata
end

#call(vm) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2763

def call(vm)
  vm.push(vm.pop[object])
end

#deconstruct_keys(_keys) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2742

def deconstruct_keys(_keys)
  { object: object, calldata: calldata }
end

#disasm(fmt) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2731

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

#length ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2751

def length
  3
end

#pops ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2755

def pops
  1
end

#pushes ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2759

def pushes
  1
end

#to_a(_iseq) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2738

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