Class: SyntaxTree::YARV::OptEmptyP

Inherits:
Instruction show all
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

"".empty?

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Instruction

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

Constructor Details

#initialize(calldata) ⇒ OptEmptyP

Returns a new instance of OptEmptyP.



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3090

def initialize(calldata)
  @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 3088

def calldata
  @calldata
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3106

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

#call(vm) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3126

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

#canonical ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3122

def canonical
  Send.new(calldata, nil)
end

#deconstruct_keys(_keys) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3102

def deconstruct_keys(_keys)
  { calldata: calldata }
end

#disasm(fmt) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3094

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

#length ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3110

def length
  2
end

#pops ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3114

def pops
  1
end

#pushes ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3118

def pushes
  1
end

#to_a(_iseq) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3098

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