# libtmux::first

- **Module:** libtmux
- **Package:** libtmux-cxx
- **Language:** C++
- **Kind:** function
- **Source:** https://github.com/libtmux/libtmux-cxx/blob/85e8bd603a322dc32bb8b9aeb1a72bcf36945f1d/include/libtmux/cardinality.hpp#L51
- **Page:** https://libtmux.org/reference/cxx/libtmux-first/

```
libtmux::first(Range: ReferenceRange, range: Range &) -> ReferenceRange
```

`first` states that a caller tolerates extras; it never reports several.