# tensorflow::ops::AssignSub

`#include <state_ops.h>`

Update 'ref' by subtracting 'value' from it.

## Summary

This operation outputs "ref" after the update is done. This makes it easier to chain operations that need to use the reset value.

Arguments:

- scope: A [Scope](https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/scope#classtensorflow_1_1_scope) object
- ref: Should be from a `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/variable#classtensorflow_1_1ops_1_1_variable` node.
- value: The value to be subtracted to the variable.

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Optional attributes (see `https://www.tensorflow.org/versions/r1.15/api_docs/cc/struct/tensorflow/ops/assign-sub/attrs#structtensorflow_1_1ops_1_1_assign_sub_1_1_attrs`):

- use_locking: If True, the subtraction will be protected by a lock; otherwise the behavior is undefined, but may exhibit less contention.

<br />

Returns:

- `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/output#classtensorflow_1_1_output`: = Same as "ref". Returned as a convenience for operations that want to use the new value after the variable has been updated.

<br />

| ### Constructors and Destructors ||
|---|---|
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/assign-sub#classtensorflow_1_1ops_1_1_assign_sub_1a30794516fd9ad127fe4fbece311a1b71(const ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/scope#classtensorflow_1_1_scope & scope, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input ref, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input value)` ||
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/assign-sub#classtensorflow_1_1ops_1_1_assign_sub_1a307c78fa1222456b4d159fec27e5c4f8(const ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/scope#classtensorflow_1_1_scope & scope, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input ref, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input value, const https://www.tensorflow.org/versions/r1.15/api_docs/cc/struct/tensorflow/ops/assign-sub/attrs#structtensorflow_1_1ops_1_1_assign_sub_1_1_attrs & attrs)` ||

| ### Public attributes ||
|---|---|
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/assign-sub#classtensorflow_1_1ops_1_1_assign_sub_1adf23f257a889a5b285aebbcfb471930b` | `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/operation#classtensorflow_1_1_operation` |
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/assign-sub#classtensorflow_1_1ops_1_1_assign_sub_1ae757b871ebeda8e412cbbbe061f4cddb` | `::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/output#classtensorflow_1_1_output` |

| ### Public functions ||
|---|---|
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/assign-sub#classtensorflow_1_1ops_1_1_assign_sub_1af0b1867d0c22ccab31ccdac7daf7cbf2() const ` | `::tensorflow::Node *` |
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/assign-sub#classtensorflow_1_1ops_1_1_assign_sub_1adb411254bf83000c535e6b8f88119805() const ` | ` `` ` |
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/assign-sub#classtensorflow_1_1ops_1_1_assign_sub_1a83e4daa6f284470b4f08bb7beea99533() const ` | ` `` ` |

| ### Public static functions ||
|---|---|
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/assign-sub#classtensorflow_1_1ops_1_1_assign_sub_1a3ec527b7a8c443ddc8ace66e8df0ebae(bool x)` | `https://www.tensorflow.org/versions/r1.15/api_docs/cc/struct/tensorflow/ops/assign-sub/attrs#structtensorflow_1_1ops_1_1_assign_sub_1_1_attrs` |

| ### Structs ||
|---|---|
| [tensorflow::ops::AssignSub::Attrs](https://www.tensorflow.org/versions/r1.15/api_docs/cc/struct/tensorflow/ops/assign-sub/attrs) | Optional attribute setters for [AssignSub](https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/assign-sub#classtensorflow_1_1ops_1_1_assign_sub). |

## Public attributes

### operation

```
Operation operation
```

### output_ref

```
::tensorflow::Output output_ref
```

## Public functions

### AssignSub

```
 AssignSub(
  const ::tensorflow::Scope & scope,
  ::tensorflow::Input ref,
  ::tensorflow::Input value
)
```

### AssignSub

```
 AssignSub(
  const ::tensorflow::Scope & scope,
  ::tensorflow::Input ref,
  ::tensorflow::Input value,
  const AssignSub::Attrs & attrs
)
```

### node

```
::tensorflow::Node * node() const 
```

### operator::tensorflow::Input

```
 operator::tensorflow::Input() const 
```

### operator::tensorflow::Output

```
 operator::tensorflow::Output() const 
```

## Public static functions

### UseLocking

```
Attrs UseLocking(
  bool x
)
```