## PrefixOperatorAtom class [​](/content/docs/sdk/core.prefixoperatoratom#prefixoperatoratom-class "Direct link to PrefixOperatorAtom class"/index.html)

**Signature:**

```typescript
export declare abstract class PrefixOperatorAtom implements Atom
```

**Implements:** [Atom](/content/docs/sdk/core.atom)

## Constructors [​](/content/docs/sdk/core.prefixoperatoratom#constructors "Direct link to Constructors"/index.html)

| Constructor | Modifiers | Description |
| --- | --- | --- |
| [constructor(operator, child)](/content/docs/sdk/core.prefixoperatoratom._constructor_/index.html) |  | Constructs a new instance of the `PrefixOperatorAtom` class |

## Properties [​](/content/docs/sdk/core.prefixoperatoratom#properties "Direct link to Properties"/index.html)

| Property | Modifiers | Type | Description |
| --- | --- | --- | --- |
| [child](/content/docs/sdk/core.prefixoperatoratom.child) | `readonly` | [Atom](/content/docs/sdk/core.atom) |  |
| [operator](/content/docs/sdk/core.prefixoperatoratom.operator) | `readonly` | string |  |

## Methods [​](/content/docs/sdk/core.prefixoperatoratom#methods "Direct link to Methods"/index.html)

| Method | Modifiers | Description |
| --- | --- | --- |
| [eval(context, input)](/content/docs/sdk/core.prefixoperatoratom.eval) | `abstract` |  |
| [toString()](/content/docs/sdk/core.prefixoperatoratom.tostring) |  |  |

- [PrefixOperatorAtom class](/content/docs/sdk/core.prefixoperatoratom#prefixoperatoratom-class/index.html)
- [Constructors](/content/docs/sdk/core.prefixoperatoratom#constructors/index.html)
- [Properties](/content/docs/sdk/core.prefixoperatoratom#properties/index.html)
- [Methods](/content/docs/sdk/core.prefixoperatoratom#methods/index.html)