class SyntaxTree::YARV::SetInstanceVariable

### Summary

‘setinstancevariable` pops a value off the top of the stack and then sets the instance variable associated with the instruction to that value.

This instruction has two forms, but both have the same structure. Before Ruby 3.2, the inline cache corresponded to both the get and set instructions and could be shared. Since Ruby 3.2, it uses object shapes instead so the caches are unique per instruction.

### Usage

~~~ruby @instance_variable = 1 ~~~

Attributes

cache [R]

name [R]

Public Class Methods

new (name, cache)

Source

# File lib/syntax_tree/yarv/instructions.rb, line 5264
def initialize(name, cache)
  @name = name
  @cache = cache
end

Public Instance Methods

== (other)

Source

# File lib/syntax_tree/yarv/instructions.rb, line 5284
def ==(other)
  other.is_a?(SetInstanceVariable) && other.name == name &&
    other.cache == cache
end

call (vm)

Source

# File lib/syntax_tree/yarv/instructions.rb, line 5297
def call(vm)
  method = Object.instance_method(:instance_variable_set)
  method.bind(vm.frame._self).call(name, vm.pop)
end

deconstruct_keys (_keys)

Source

# File lib/syntax_tree/yarv/instructions.rb, line 5280
def deconstruct_keys(_keys)
  { name: name, cache: cache }
end

disasm (fmt)

Source

# File lib/syntax_tree/yarv/instructions.rb, line 5269
def disasm(fmt)
  fmt.instruction(
    "setinstancevariable",
    [fmt.object(name), fmt.inline_storage(cache)]
  )
end

length ()

Source

# File lib/syntax_tree/yarv/instructions.rb, line 5289
def length
  3
end

pops ()

Source

# File lib/syntax_tree/yarv/instructions.rb, line 5293
def pops
  1
end

to_a (_iseq)

Source

# File lib/syntax_tree/yarv/instructions.rb, line 5276
def to_a(_iseq)
  [:setinstancevariable, name, cache]
end