class SyntaxTree::YARV::OptLength

### Summary

‘opt_length` is a specialization of `opt_send_without_block`, when the `length` method is called. There are fast paths when the receiver is either a string, hash, or array. It pops the receiver off the stack and pushes on the result of the method call.

### Usage

~~~ruby “”.length ~~~

Attributes

calldata[R]

Public Class Methods

new(calldata) click to toggle source

# File lib/syntax_tree/yarv/instructions.rb, line 3431
def initialize(calldata)
  @calldata = calldata
end

Public Instance Methods

==(other) click to toggle source

# File lib/syntax_tree/yarv/instructions.rb, line 3447
def ==(other)
  other.is_a?(OptLength) && other.calldata == calldata
end

call(vm) click to toggle source

# File lib/syntax_tree/yarv/instructions.rb, line 3467
def call(vm)
  canonical.call(vm)
end

canonical() click to toggle source

# File lib/syntax_tree/yarv/instructions.rb, line 3463
def canonical
  Send.new(calldata, nil)
end

deconstruct_keys(_keys) click to toggle source

# File lib/syntax_tree/yarv/instructions.rb, line 3443
def deconstruct_keys(_keys)
  { calldata: calldata }
end

disasm(fmt) click to toggle source

# File lib/syntax_tree/yarv/instructions.rb, line 3435
def disasm(fmt)
  fmt.instruction("opt_length", [fmt.calldata(calldata)])
end

length() click to toggle source

# File lib/syntax_tree/yarv/instructions.rb, line 3451
def length
  2
end

pops() click to toggle source

# File lib/syntax_tree/yarv/instructions.rb, line 3455
def pops
  1
end

pushes() click to toggle source

# File lib/syntax_tree/yarv/instructions.rb, line 3459
def pushes
  1
end

to_a(_iseq) click to toggle source

# File lib/syntax_tree/yarv/instructions.rb, line 3439
def to_a(_iseq)
  [:opt_length, calldata.to_h]
end