class SyntaxTree::Parser

def on_assoc_splat(value)

on_assoc_splat: (untyped value) -> AssocSplat
:call-seq: 
def on_assoc_splat(value)
  operator = consume_operator(:**)
  AssocSplat.new(
    value: value,
    location: operator.location.to((value || operator).location)
  )
end