cutcutcodec.core.compilation.sympy_to_torch.printer.c_piecewise¶

cutcutcodec.core.compilation.sympy_to_torch.printer.c_piecewise(out: Symbol, indexing: defaultdict[Symbol, str], c_type: str, *parts: Atom) → tuple[set[str], set[Symbol], list[str]][source]¶

C … if … else … operation.

Examples¶

>>> from sympy.abc import x
>>> from sympy.functions.elementary.piecewise import Piecewise
>>> import numpy as np
>>> from cutcutcodec.core.compilation.sympy_to_torch.lambdify import _lambdify_c
>>> from cutcutcodec.core.compilation.sympy_to_torch.printer import _print_atomic, _printer
>>> func = _lambdify_c(_printer([(x, Piecewise((0, x < 0), (x, True)))], {}, {x}))
>>> func(np.array([np.nan, -np.inf, -1.0, 0.0, 1.0, np.inf]))
array([nan,  0.,  0.,  0.,  1., inf])
>>>