---
title: WhenComparable
framework: driverkit
role: symbol
role_heading: Type Alias
path: driverkit/libkern/detail/whencomparable
---

# WhenComparable

## Declaration

```occ
typedef void_t<decltype(declval<type-parameter-0-0>() == declval<type-parameter-0-1>()), decltype(declval<type-parameter-0-0>() != declval<type-parameter-0-1>())> WhenComparable;
```