Function ahead

ahead(literal): RegExpToken
Wrap the given token in a positive lookahead.
Parameters
- literal: string
Returns RegExpToken
Example
```
ahead`foo`
ahead.exactly`foo`
ahead('foo')
```
RegExp equivalent:
```
/(?=foo)/
```
Example
Negated token - Negative lookahead
```
notAhead`foo`
not.ahead`foo`
notAhead.exactly`foo`
notAhead('foo')
```
RegExp equivalent:
```
/(?!foo)/
```
- Defined in types.ts:8
ahead(template, ...args): RegExpToken
Wrap the given token in a positive lookahead.
Parameters
- template: TemplateStringsArray
- Rest ...args: unknown[]
Returns RegExpToken
Example
```
ahead`foo`
ahead.exactly`foo`
ahead('foo')
```
RegExp equivalent:
```
/(?=foo)/
```
Example
Negated token - Negative lookahead
```
notAhead`foo`
not.ahead`foo`
notAhead.exactly`foo`
notAhead('foo')
```
RegExp equivalent:
```
/(?!foo)/
```
- Defined in types.ts:9
ahead(node?): RegExpToken
Wrap the given token in a positive lookahead.
Parameters
- Optional node: RegExpToken
Returns RegExpToken
Example
```
ahead`foo`
ahead.exactly`foo`
ahead('foo')
```
RegExp equivalent:
```
/(?=foo)/
```
Example
Negated token - Negative lookahead
```
notAhead`foo`
not.ahead`foo`
notAhead.exactly`foo`
notAhead('foo')
```
RegExp equivalent:
```
/(?!foo)/
```
- Defined in types.ts:68

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