DataSketches.Core.Internal.URef

An unboxed reference. This works like an IORef, but the data is stored in a bytearray instead of a heap object, avoiding significant allocation overhead in some cases. For a concrete example, see this Stack Overflow question: https://stackoverflow.com/questions/27261813/why-is-my-little-stref-int-require-allocating-gigabytes.

The first parameter is the state token type, the same as would be used for the ST monad. If you're using an IO-based monad, you can use the convenience IOURef type synonym instead.

Helpful type synonym for using a URef from an IO-based stack.

Create a new URef

Read the value in a URef

Write a value into a URef. Note that this action is strict, and will force evalution of the value.

Modify a value in a URef. Note that this action is strict, and will force evaluation of the result value.