Class: SyntaxTree::YARV::OptArefWith

Inherits:
Instruction show all
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 collapse

Instance Method Summary collapse

Methods inherited from Instruction

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

Constructor Details

#initialize(object, calldata) ⇒ OptArefWith 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2784

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

Instance Attribute Details

#calldata ⇒ Object (readonly)

Returns the value of attribute calldata.



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2782

def calldata
  @calldata
end

#object ⇒ Object (readonly)

Returns the value of attribute object.



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2782

def object
  @object
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2804

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

#call(vm) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2821

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

#deconstruct_keys(_keys) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2800

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

#disasm(fmt) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2789

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

#length ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2809

def length
  3
end

#pops ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2813

def pops
  1
end

#pushes ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2817

def pushes
  1
end

#to_a(_iseq) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 2796

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