def deref(addr, typ):
    return cast(addr, POINTER(typ)).contents
Evaluate efficiently the composition ``f(-x)`` in ``K[x]``.
dataset/ETHPy150Open tmetsch/python-dtrace/dtrace_ctypes/consumer.py/deref--crossover with--dataset/ETHPy150Open sympy/sympy/sympy/polys/densetools.py/dup_mirror