class SyntaxTree::YARV::CheckKeyword

### Summary

‘checkkeyword` checks if a keyword was passed at the callsite that called into the method represented by the instruction sequence. It has two arguments: the index of the local variable that stores the keywords metadata and the index of the keyword within that metadata. It pushes a boolean onto the stack indicating whether or not the keyword was given.

### Usage

~~~ruby def evaluate(value: rand)

value

end

evaluate(value: 3) ~~~

Attributes

keyword_bits_index [R]

keyword_index [R]

Public Class Methods

new (keyword_bits_index, keyword_index)

Source

# File lib/syntax_tree/yarv/instructions.rb, line 362
def initialize(keyword_bits_index, keyword_index)
  @keyword_bits_index = keyword_bits_index
  @keyword_index = keyword_index
end

Public Instance Methods

== (other)

Source

# File lib/syntax_tree/yarv/instructions.rb, line 386
def ==(other)
  other.is_a?(CheckKeyword) &&
    other.keyword_bits_index == keyword_bits_index &&
    other.keyword_index == keyword_index
end

call (vm)

Source

# File lib/syntax_tree/yarv/instructions.rb, line 400
def call(vm)
  vm.push(vm.local_get(keyword_bits_index, 0)[keyword_index])
end

deconstruct_keys (_keys)

Source

# File lib/syntax_tree/yarv/instructions.rb, line 382
def deconstruct_keys(_keys)
  { keyword_bits_index: keyword_bits_index, keyword_index: keyword_index }
end

disasm (fmt)

Source

# File lib/syntax_tree/yarv/instructions.rb, line 367
def disasm(fmt)
  fmt.instruction(
    "checkkeyword",
    [fmt.object(keyword_bits_index), fmt.object(keyword_index)]
  )
end

length ()

Source

# File lib/syntax_tree/yarv/instructions.rb, line 392
def length
  3
end

pushes ()

Source

# File lib/syntax_tree/yarv/instructions.rb, line 396
def pushes
  1
end

to_a (iseq)

Source

# File lib/syntax_tree/yarv/instructions.rb, line 374
def to_a(iseq)
  [
    :checkkeyword,
    iseq.local_table.offset(keyword_bits_index),
    keyword_index
  ]
end