%2 = "tf.IfRegion"(%arg0) ({
      %3 = "tf.StringToNumber"(%arg1) {out_type = f32} : (tensor<!tf_type.string>) -> tensor<f32>
      "tf.Yield"(%3) : (tensor<f32>) -> ()
     },  {
      %4 = "tf.Const"() {value = dense<1.0> : tensor<f32>} : () -> tensor<f32>
      "tf.Yield"(%4) : (tensor<f32>) -> ()
    }) {is_stateless = true} : (tensor<i1>) -> (tensor<f32>)
    %5 = "tf.Identity"(%2) : (tensor<f32>) -> tensor<f32>

    "tfl.yield"(%1) : (tensor<i1>) -> ()
  },  {
  ^bb0(%arg0: tensor<*xi32>, %arg1: tensor<*xf32>):
    // CHECK: call @WhileOp_body
    // CHECK-SAME: (tensor<*xi32>, tensor<*xf32>, tensor<i32>)
    %1:3 = func.call @WhileOp_body(%arg0, %arg1, %cst) : (tensor<*xi32>, tensor<*xf32>, tensor<i32>) -> (tensor<*xi32>, tensor<*xf32>, tensor<i32>)
    "tfl.yield"(%1#0, %1#1) : (tensor<*xi32>, tensor<*xf32>) -> ()

    }
  }
  OpBuilder::atBlockEnd(&island_body)
      .create<YieldOp>(new_island.getLoc(), yield_operands);

  // remap results of the new islands to the user outside of the island.
  int current_result = 0;
  Value control = new_island.getControl();
  for (IslandOp island : islands) {
    YieldOp yield_op = island.GetYield();
    for (const auto& idx_result : llvm::enumerate(island.getOutputs())) {

  auto while_input_types = dataset_while.getOperandTypes();
  cond_block->addArguments(
      while_input_types, SmallVector<Location>(while_input_types.size(), loc));
  builder.create<YieldOp>(loc, cond_block->getArgument(0));
}

// Create an IfRegionOp with a predicate from `optional_has_value`.  If true, it
// uses `get_next` to get the next value and calls `reduce_func`.  `body_args`

        	apiextensions_apiserver_validation_ratcheting_seconds_sum 5e-09
        	apiextensions_apiserver_validation_ratcheting_seconds_count 5
			`,
			iters: 5,
		},
		{
			desc: "valid change yields no metrics",
			obj: &unstructured.Unstructured{
				Object: map[string]interface{}{
					"foo": "bar",
				},
			},
			old: &unstructured.Unstructured{
				Object: map[string]interface{}{

     & ⤴️ 👥 🔐 ⚫️ `finally` 🍫.

    👉 🌌 👥 ⚒ 💭 💽 🎉 🕧 📪 ⏮️ 📨. 🚥 📤 ⚠ ⏪ 🏭 📨.

    ✋️ 👆 💪 🚫 🤚 ➕1️⃣ ⚠ ⚪️➡️ 🚪 📟 (⏮️ `yield`). 👀 🌖 [🔗 ⏮️ `yield` & `HTTPException`](dependencies/dependencies-with-yield.md#yield-httpexception){.internal-link target=_blank}

& ⤴️, 🕐❔ ⚙️ 🔗 *➡ 🛠️ 🔢*, 👥 📣 ⚫️ ⏮️ 🆎 `Session` 👥 🗄 🔗 ⚪️➡️ 🇸🇲.

    But you can't raise another exception from the exit code (after `yield`). See more in [Dependencies with `yield` and `HTTPException`](dependencies/dependencies-with-yield.md#dependencies-with-yield-and-httpexception){.internal-link target=_blank}

// safe to operate on the tree during iteration. No particular enumeration
// order is guaranteed.
func (ht *HashTrieMap[K, V]) All() func(yield func(K, V) bool) {
	return func(yield func(key K, value V) bool) {
		ht.iter(ht.root, yield)
	}
}

func (ht *HashTrieMap[K, V]) iter(i *indirect[K, V], yield func(key K, value V) bool) bool {
	for j := range i.children {
		n := i.children[j].Load()
		if n == nil {
			continue
		}

    // match the "func.return" within the function.
    //
    // So this would transform
    // func.func @f(...) -> ... {
    //     yield %x : foo
    // }
    // ...
    // func.call @f(...) -> bar
    //
    // to
    //
    // func.func @f(...) -> ... {
    //     yield %x : foo
    // }
    // ...
    // func.call f(...) -> foo
    auto symbol_uses = f.getSymbolUses(f->getParentOp());

    我们将`SessionLocal()`请求的创建和处理放在一个`try`块中。

    然后我们在finally块中关闭它。

    通过这种方式，我们确保数据库会话在请求后始终关闭。即使在处理请求时出现异常。

    但是您不能从退出代码中引发另一个异常（在yield之后）。可以查阅 [Dependencies with yield and HTTPException](https://fastapi.tiangolo.com/zh/tutorial/dependencies/dependencies-with-yield/#dependencies-with-yield-and-httpexception)

*然后，当在路径操作函数*中使用依赖项时，我们使用`Session`，直接从 SQLAlchemy 导入的类型声明它。

*这将为我们在路径操作函数*中提供更好的编辑器支持，因为编辑器将知道`db`参数的类型`Session`：