mod package:base-compat

integer modulus, satisfying

(x `div` y)*y + (x `mod` y) == x

WARNING: This function is partial (because it throws when 0 is passed as the divisor) for all the integer types in base.

Strict version of modifyIORef. This is not an atomic update, consider using atomicModifyIORef' when operating in a multithreaded environment.

Strict version of modifySTRef

Strict version of atomicModifyIORef. This forces both the value stored in the IORef and the value returned. The new value is installed in the IORef before the returned value is forced. So

atomicModifyIORef' ref (x -> (x+1, undefined))

will increment the IORef and then throw an exception in the calling thread. This function imposes a memory barrier, preventing reordering; see Data.IORef#memmodel for details.

simultaneous div and mod WARNING: This function is partial (because it throws when 0 is passed as the divisor) for all the integer types in base.