class SyntaxTree::YARV::GetBlockParam

### Summary

‘getblockparam` is a similar instruction to `getlocal` in that it looks for a local variable in the current instruction sequence’s local table and walks recursively up the parent instruction sequences until it finds it. The local it retrieves, however, is a special block local that was passed to the current method. It pushes the value of the block local onto the stack.

### Usage

~~~ruby def foo(&block)

block

end ~~~

Attributes

index [R]

level [R]

Public Class Methods

new (index, level)

Source

# File lib/syntax_tree/yarv/instructions.rb, line 1542
def initialize(index, level)
  @index = index
  @level = level
end

Public Instance Methods

== (other)

Source

# File lib/syntax_tree/yarv/instructions.rb, line 1561
def ==(other)
  other.is_a?(GetBlockParam) && other.index == index &&
    other.level == level
end

call (vm)

Source

# File lib/syntax_tree/yarv/instructions.rb, line 1574
def call(vm)
  vm.push(vm.local_get(index, level))
end

deconstruct_keys (_keys)

Source

# File lib/syntax_tree/yarv/instructions.rb, line 1557
def deconstruct_keys(_keys)
  { index: index, level: level }
end

disasm (fmt)

Source

# File lib/syntax_tree/yarv/instructions.rb, line 1547
def disasm(fmt)
  fmt.instruction("getblockparam", [fmt.local(index, explicit: level)])
end

length ()

Source

# File lib/syntax_tree/yarv/instructions.rb, line 1566
def length
  3
end

pushes ()

Source

# File lib/syntax_tree/yarv/instructions.rb, line 1570
def pushes
  1
end

to_a (iseq)

Source

# File lib/syntax_tree/yarv/instructions.rb, line 1551
def to_a(iseq)
  current = iseq
  level.times { current = iseq.parent_iseq }
  [:getblockparam, current.local_table.offset(index), level]
end