# File actionview/lib/action_view/unbound_template.rb, line 10
def initialize(source, identifier, details:, virtual_path:)
  @source = source
  @identifier = identifier
  @details = details
  @virtual_path = virtual_path

  @templates = Concurrent::Map.new(initial_capacity: 2)
  @write_lock = Mutex.new
end

# File actionview/lib/action_view/unbound_template.rb, line 20
def bind_locals(locals)
  unless template = @templates[locals]
    @write_lock.synchronize do
      normalized_locals = normalize_locals(locals)

      # We need ||=, both to dedup on the normalized locals and to check
      # while holding the lock.
      template = (@templates[normalized_locals] ||= build_template(normalized_locals))

      if template.strict_locals?
        # Under strict locals, we only need one template.
        # This replaces the @templates Concurrent::Map with a hash which
        # returns this template for every key.
        @templates = Hash.new(template).freeze
      else
        # This may have already been assigned, but we've already de-dup'd so
        # reassignment is fine.
        @templates[locals.dup] = template
      end
    end
  end
  template
end