Clamp returns x constrained within [lo:hi] range.

ClampFunc returns x constrained within [lo:hi] range using the less func.

Compare uses a less function to determine the ordering of 'a' and 'b'.

Equals wraps the '==' operator for comparable types.

Less wraps the '<' operator for ordered types.

Max returns the max of a and b.

MaxFunc returns the max of a and b using the less func.

Min returns the min of a and b.

MinFunc returns the min of a and b using the less func.

EqualsFn is a function that returns whether 'a' and 'b' are equal.

HashFn is a function that returns the hash of 't'.

LessFn is a function that returns whether 'a' is less than 'b'.