class RBS::ConstantTable

def name_to_constant(name)
  case
  when entry = env.constant_decls[name]
    type = absolute_type(entry.decl.type, context: entry.context)
    Constant.new(name: name, type: type, entry: entry)
  when entry = env.class_decls[name]
    type = Types::ClassSingleton.new(name: name, location: nil)
    Constant.new(name: name, type: type, entry: entry)
  end
end