# RegexPattern.Options.formUnion(_:)

- **Module:** RegexPattern.Options
- **Package:** libtmux-swift
- **Language:** Swift
- **Kind:** method
- **Page:** https://libtmux.org/reference/swift/regexpattern-options-formunion(_-)/

```
RegexPattern.Options.formUnion(_:)(other: Self) -> ()
```

Inserts the elements of another set into this option set.

This method is implemented as a `|` (bitwise OR) operation on the
two sets' raw values.

- Parameter other: An option set.