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) click to toggle source

# File lib/syntax_tree/yarv/instructions.rb, line 5117
def initialize(name, cache)
  @name = name
  @cache = cache
end

Public Instance Methods

==(other) click to toggle source

# File lib/syntax_tree/yarv/instructions.rb, line 5137
def ==(other)
  other.is_a?(SetInstanceVariable) && other.name == name &&
    other.cache == cache
end

call(vm) click to toggle source

# File lib/syntax_tree/yarv/instructions.rb, line 5150
def call(vm)
  method = Object.instance_method(:instance_variable_set)
  method.bind(vm.frame._self).call(name, vm.pop)
end

deconstruct_keys(_keys) click to toggle source

# File lib/syntax_tree/yarv/instructions.rb, line 5133
def deconstruct_keys(_keys)
  { name: name, cache: cache }
end

disasm(fmt) click to toggle source

# File lib/syntax_tree/yarv/instructions.rb, line 5122
def disasm(fmt)
  fmt.instruction(
    "setinstancevariable",
    [fmt.object(name), fmt.inline_storage(cache)]
  )
end

length() click to toggle source

# File lib/syntax_tree/yarv/instructions.rb, line 5142
def length
  3
end

pops() click to toggle source

# File lib/syntax_tree/yarv/instructions.rb, line 5146
def pops
  1
end

to_a(_iseq) click to toggle source

# File lib/syntax_tree/yarv/instructions.rb, line 5129
def to_a(_iseq)
  [:setinstancevariable, name, cache]
end