# libtmux::test::lacks_tmux

- **Module:** libtmux::test
- **Package:** libtmux-cxx
- **Language:** C++
- **Kind:** function
- **Source:** https://github.com/libtmux/libtmux-cxx/blob/542fdc204ff3cfa56f5484327cda0c69bad2307d/include/libtmux/testing/capabilities.hpp#L25
- **Page:** https://libtmux.org/en/cxx/latest/reference/libtmux-test-lacks_tmux/

```
[[nodiscard]] constexpr bool
lacks_tmux(const Version& running, std::uint32_t major,
           std::uint32_t minor) noexcept;
```

Whether `running` ranks below the release `major.minor`.

A `next-` build ranks below the release it leads to.

## Parameters

- `running` (`const Version &`)
- `major` (`std::uint32_t`)
- `minor` (`std::uint32_t`)