Class: SyntaxTree::YARV::OptPlus

Inherits:
Instruction show all
Defined in:
lib/syntax_tree/yarv/instructions.rb

Overview

### Summary

‘opt_plus` is a specialization of the `opt_send_without_block` instruction that occurs when the `+` operator is used. There are fast paths for if both operands are integers, floats, strings, or arrays. It pops both the receiver and the argument off the stack and pushes on the result.

### Usage

~~~ruby 2 + 3 ~~~

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Instruction

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

Constructor Details

#initialize(calldata) ⇒ OptPlus

Returns a new instance of OptPlus.



4115
4116
4117
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4115

def initialize(calldata)
  @calldata = calldata
end

Instance Attribute Details

#calldata ⇒ Object (readonly)

Returns the value of attribute calldata.



4113
4114
4115
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4113

def calldata
  @calldata
end

Instance Method Details

#==(other) ⇒ Object 



4131
4132
4133
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4131

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

#call(vm) ⇒ Object 



4151
4152
4153
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4151

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

#canonical ⇒ Object 



4147
4148
4149
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4147

def canonical
  Send.new(calldata, nil)
end

#deconstruct_keys(_keys) ⇒ Object 



4127
4128
4129
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4127

def deconstruct_keys(_keys)
  { calldata: calldata }
end

#disasm(fmt) ⇒ Object 



4119
4120
4121
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4119

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

#length ⇒ Object 



4135
4136
4137
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4135

def length
  2
end

#pops ⇒ Object 



4139
4140
4141
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4139

def pops
  2
end

#pushes ⇒ Object 



4143
4144
4145
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4143

def pushes
  1
end

#to_a(_iseq) ⇒ Object 



4123
4124
4125
 
# File 'lib/syntax_tree/yarv/instructions.rb', line 4123

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