};

SymbolicGradientBuilder::SymbolicGradientBuilder(
    const Scope& scope, const ops::GradOpRegistry* registry,
    const std::vector<Output>& outputs, const std::vector<Output>& inputs,
    const std::vector<Output>& grad_inputs, std::vector<Output>* grad_outputs)
    : scope_(scope),
      registry_(registry),
      outputs_(outputs),
      inputs_(inputs),
      grad_inputs_(grad_inputs),

        scope_.graph()->AddControlEdge(e->src(), new_const.node());
      }
    }
    return it->second;
  }

 private:
  Scope scope_;
  std::unordered_map<int, Output> cache_;
  std::vector<const Edge*> control_deps_;
};

// Returns a node computing the size of the Slice op with inputs `slice_inputs`.
Status ComputeSliceSize(const Scope& host_scope,

// and looked up by name. The zero value for Scope is a ready-to-use
// empty scope.
type Scope struct {
	parent   *Scope
	children []*Scope
	number   int               // parent.children[number-1] is this scope; 0 if there is no parent
	elems    map[string]Object // lazily allocated
	pos, end token.Pos         // scope extent; may be invalid
	comment  string            // for debugging only

func NewScope(parent *Scope, pos, end syntax.Pos, comment string) *Scope {
	s := &Scope{parent, nil, 0, nil, pos, end, comment, false}
	// don't add children to Universe scope!
	if parent != nil && parent != Universe {
		parent.children = append(parent.children, s)
		s.number = len(parent.children)
	}
	return s
}

// Parent returns the scope's containing (parent) scope.
func (s *Scope) Parent() *Scope { return s.parent }

  // scopes, or scopes derived from an existing scope object.

  /// Return a new scope.
  /// This creates a new graph and all operations constructed in this graph
  /// should use the returned object as the "root" scope.
  static Scope NewRootScope();

  /// Return a new scope. Ops created with this scope will have

We are still using the same `OAuth2PasswordRequestForm`. It includes a property `scopes` with a `list` of `str`, with each scope it received in the request.

And we return the scopes as part of the JWT token.

!!! danger
    For simplicity, here we are just adding the scopes received directly to the token.

<img src="/img/tutorial/security/image11.png">

## JWT-Token mit Scopes

Ändern Sie nun die Token-*Pfadoperation*, um die angeforderten Scopes zurückzugeben.

Wir verwenden immer noch dasselbe `OAuth2PasswordRequestForm`. Es enthält eine Eigenschaft `scopes` mit einer `list`e von `str`s für jeden Scope, den es im Request erhalten hat.

Und wir geben die Scopes als Teil des JWT-Tokens zurück.

!!! danger "Gefahr"

#include "tensorflow/core/graph/node_builder.h"
#include "tensorflow/core/lib/strings/str_util.h"

namespace tensorflow {

Scope::Scope(Impl* impl) : impl_(impl) {}

Scope::Scope(const Scope& other) : impl_(new Impl(*other.impl())) {}

Scope::~Scope() {}

Scope& Scope::operator=(const Scope& other) {
  // We can't copy Impls because of the const members, use copy ctor instead
  impl_.reset(new Impl(*other.impl_));

                        * `security_scopes` 参数的属性 `scopes` 是包含上述声明的所有作用域的**列表**，因此：
                            * `security_scopes.scopes` 包含用于*路径操作*的 `["me", "items"]`
                            * `security_scopes.scopes` 包含*路径操作* `read_users_me` 的 `["me"]`，因为它在依赖项里被声明
                            * `security_scopes.scopes` 包含用于*路径操作* `read_system_status` 的 `[]`（空列表），并且它的依赖项 `get_current_user` 也没有声明任何 `scope`

!!! tip "提示"

// their descendant scopes fail.
func (c *testContext) topLevelScopes() []*scope {
	var out []*scope
	current := c.scope.parent
	for current != nil {
		if current.topLevel {
			out = append(out, current)
		}
		current = current.parent
	}
	return out
}

func (c *testContext) dump() {
	if c.suite.RequestTestDump() {
		scopes.Framework.Debugf("Begin dumping testContext: %q", c.id)