class SyntaxTree::YARV::VM::Stack

wraps mutating functions with instrumentation.
This represents the global VM stack. It effectively is an array, but

def [](...) 

def [](...)
  values.[](...)
end

def []=(...) 

def []=(...)
  values.[]=(...).tap { events.publish_stack_change(self) }
end

def concat(...) 

def concat(...)
  values.concat(...).tap { events.publish_stack_change(self) }
end

def initialize(events) 

def initialize(events)
  @events = events
  @values = []
end

def last 

def last
  values.last
end

def length 

def length
  values.length
end

def pop(...) 

def pop(...)
  values.pop(...).tap { events.publish_stack_change(self) }
end

def push(...) 

def push(...)
  values.push(...).tap { events.publish_stack_change(self) }
end

def slice!(...) 

def slice!(...)
  values.slice!(...).tap { events.publish_stack_change(self) }
end