#   Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from __future__ import annotations

from typing import TYPE_CHECKING

from paddle._C_ops import (  # noqa: F401
    cos,
    floor,
    rsqrt,
    sigmoid,
    sin,
    sqrt,
)
from paddle.utils.inplace_utils import inplace_apis_in_dygraph_only

from .. import _C_ops
from ..base.data_feeder import check_variable_and_dtype
from ..framework import LayerHelper, in_dynamic_or_pir_mode
from .layer_function_generator import (
    generate_activation_fn,
    generate_inplace_fn,
    generate_layer_fn,
)

if TYPE_CHECKING:
    from paddle import Tensor

__inplace_unary_func__ = [
    'exp_',
    'sqrt_',
    'rsqrt_',
    'ceil_',
    'floor_',
    'reciprocal_',
    'sigmoid_',
    'abs_',
    'sin_',
    'sinh_',
    'asin_',
    'asinh_',
    'cos_',
    'cosh_',
    'acos_',
    'acosh_',
    'tan_',
    'atan_',
    'atanh_',
    'expm1_',
    'erf_',
    'square_',
]

__all__ = []

# It is a hot fix in some unittest using:
#   paddle.scale(x=x, scale=10.0, out=out_var)
# e.g.: test_program_code.py, test_dist_train.py
globals()['_scale'] = generate_layer_fn('scale')

for _OP in set(__inplace_unary_func__):
    func = generate_inplace_fn(_OP)
    func.__module__ = __name__
    _func = inplace_apis_in_dygraph_only(func)
    globals()[_OP] = _func


def abs(x: Tensor, name: str | None = None) -> Tensor:
    """
    Perform elementwise abs for input `x`.

    .. math::

        out = |x|

    Args:
        x (Tensor): The input Tensor with data type int32, int64, float16, float32, float64, complex64 and complex128.
        name (str|None, optional): Name for the operation (optional, default is None). For more information, please refer to :ref:`api_guide_Name`.

    Returns:
        Tensor.A Tensor with the same data type and shape as :math:`x`.

    Examples:
        .. code-block:: python

            >>> import paddle

            >>> x = paddle.to_tensor([-0.4, -0.2, 0.1, 0.3])
            >>> out = paddle.abs(x)
            >>> print(out)
            Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
            [0.40000001, 0.20000000, 0.10000000, 0.30000001])
    """
    return generate_activation_fn('abs')(x, name)


def acos(x: Tensor, name: str | None = None) -> Tensor:
    """
    Acos Activation Operator.

    .. math::
        out = cos^{-1}(x)

    Args:
        x (Tensor): Input of Acos operator, an N-D Tensor, with data type float32, float64, float16, bfloat16,
            uint8, int8, int16, int32, int64, complex64 or complex128.
        name (str|None, optional): Name for the operation (optional, default is None). For more information, please refer to :ref:`api_guide_Name`.

    Returns:
        Tensor. Output of Acos operator, a Tensor with shape same as input
            (integer types are autocasted into float32).

    Examples:
        .. code-block:: python

            >>> import paddle

            >>> x = paddle.to_tensor([-0.4, -0.2, 0.1, 0.3])
            >>> out = paddle.acos(x)
            >>> print(out)
            Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
            [1.98231316, 1.77215421, 1.47062886, 1.26610363])
    """
    if in_dynamic_or_pir_mode():
        return _C_ops.acos(x)
    else:
        check_variable_and_dtype(
            x,
            'x',
            [
                'float16',
                'uint16',
                'float32',
                'float64',
                'uint8',
                'int8',
                'int16',
                'int32',
                'int64',
                'complex64',
                'complex128',
            ],
            'acos',
        )
        helper = LayerHelper('acos', **locals())
        out = helper.create_variable_for_type_inference(dtype=x.dtype)
        helper.append_op(type='acos', inputs={"X": x}, outputs={"Out": out})
        return out


def acosh(x: Tensor, name: str | None = None) -> Tensor:
    """
    Acosh Activation Operator.

    .. math::
       out = acosh(x)

    Args:
        x (Tensor): Input of Acosh operator, an N-D Tensor, with data type float32, float64, float16, bfloat16,
            uint8, int8, int16, int32, int64, complex64 or complex128.
        name (str|None, optional): Name for the operation (optional, default is None). For more information, please refer to :ref:`api_guide_Name`.

    Returns:
        Tensor. Output of Acosh operator, a Tensor with shape same as input
            (integer types are autocasted into float32).

    Examples:
        .. code-block:: python

            >>> import paddle

            >>> x = paddle.to_tensor([1., 3., 4., 5.])
            >>> out = paddle.acosh(x)
            >>> print(out)
            Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
            [0.        , 1.76274717, 2.06343699, 2.29243159])
    """
    if in_dynamic_or_pir_mode():
        return _C_ops.acosh(x)
    else:
        check_variable_and_dtype(
            x,
            'x',
            [
                'float16',
                'uint16',
                'float32',
                'float64',
                'uint8',
                'int8',
                'int16',
                'int32',
                'int64',
                'complex64',
                'complex128',
            ],
            'acosh',
        )
        helper = LayerHelper('acosh', **locals())
        out = helper.create_variable_for_type_inference(dtype=x.dtype)
        helper.append_op(type='acosh', inputs={"X": x}, outputs={"Out": out})
        return out


def asin(x: Tensor, name: str | None = None) -> Tensor:
    """
    Arcsine Operator.

    .. math::
       out = sin^{-1}(x)

    Args:
        x (Tensor): Input of Asin operator, an N-D Tensor, with data type float32, float64, float16, bfloat16,
            uint8, int8, int16, int32, int64, complex64 or complex128.
        name (str|None, optional): Name for the operation (optional, default is None). For more information, please refer to :ref:`api_guide_Name`.

    Returns:
        Tensor. Same shape and dtype as input
            (integer types are autocasted into float32).

    Examples:
        .. code-block:: python

            >>> import paddle

            >>> x = paddle.to_tensor([-0.4, -0.2, 0.1, 0.3])
            >>> out = paddle.asin(x)
            >>> print(out)
            Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
            [-0.41151685, -0.20135793,  0.10016742,  0.30469266])
    """
    if in_dynamic_or_pir_mode():
        return _C_ops.asin(x)
    else:
        check_variable_and_dtype(
            x,
            'x',
            [
                'float16',
                'uint16',
                'float32',
                'float64',
                'uint8',
                'int8',
                'int16',
                'int32',
                'int64',
                'complex64',
                'complex128',
            ],
            'asin',
        )
        helper = LayerHelper('asin', **locals())
        out = helper.create_variable_for_type_inference(dtype=x.dtype)
        helper.append_op(type='asin', inputs={"X": x}, outputs={"Out": out})
        return out


def asinh(x: Tensor, name: str | None = None) -> Tensor:
    """
    Asinh Activation Operator.

    .. math::
       out = asinh(x)

    Args:
        x (Tensor): Input of Asinh operator, an N-D Tensor, with data type float32, float64, float16, bfloat16,
            uint8, int8, int16, int32, int64, complex64 or complex128.
        name (str|None, optional): Name for the operation (optional, default is None). For more information, please refer to :ref:`api_guide_Name`.

    Returns:
        Tensor. Output of Asinh operator, a Tensor with shape same as input
            (integer types are autocasted into float32).

    Examples:
        .. code-block:: python

            >>> import paddle

            >>> x = paddle.to_tensor([-0.4, -0.2, 0.1, 0.3])
            >>> out = paddle.asinh(x)
            >>> print(out)
            Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
            [-0.39003533, -0.19869010,  0.09983408,  0.29567307])
    """
    if in_dynamic_or_pir_mode():
        return _C_ops.asinh(x)
    else:
        check_variable_and_dtype(
            x,
            'x',
            [
                'float16',
                'uint16',
                'float32',
                'float64',
                'uint8',
                'int8',
                'int16',
                'int32',
                'int64',
                'complex64',
                'complex128',
            ],
            'asinh',
        )
        helper = LayerHelper('asinh', **locals())
        out = helper.create_variable_for_type_inference(dtype=x.dtype)
        helper.append_op(type='asinh', inputs={"X": x}, outputs={"Out": out})
        return out


def atan(x: Tensor, name: str | None = None) -> Tensor:
    """
    Arctangent Operator.

    .. math::
       out = tan^{-1}(x)

    Args:
        x (Tensor): Input of Atan operator, an N-D Tensor, with data type float32, float64, float16, bfloat16,
            uint8, int8, int16, int32, int64, complex64 or complex128.
        name (str|None, optional): Name for the operation (optional, default is None). For more information, please refer to :ref:`api_guide_Name`.

    Returns:
        Tensor. Same shape and dtype as input x
            (integer types are autocasted into float32).

    Examples:
        .. code-block:: python

            >>> import paddle

            >>> x = paddle.to_tensor([-0.4, -0.2, 0.1, 0.3])
            >>> out = paddle.atan(x)
            >>> print(out)
            Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
            [-0.38050640, -0.19739556,  0.09966865,  0.29145682])
    """
    if in_dynamic_or_pir_mode():
        return _C_ops.atan(x)
    else:
        check_variable_and_dtype(
            x,
            'x',
            [
                'float16',
                'uint16',
                'float32',
                'float64',
                'uint8',
                'int8',
                'int16',
                'int32',
                'int64',
                'complex64',
                'complex128',
            ],
            'atan',
        )
        helper = LayerHelper('atan', **locals())
        out = helper.create_variable_for_type_inference(dtype=x.dtype)
        helper.append_op(type='atan', inputs={"X": x}, outputs={"Out": out})
        return out


def atanh(x: Tensor, name: str | None = None) -> Tensor:
    """
    Atanh Activation Operator.

    .. math::
       out = atanh(x)

    Args:
        x (Tensor): Input of Atan operator, an N-D Tensor, with data type float32, float64, float16, bfloat16,
            uint8, int8, int16, int32, int64, complex64 or complex128.
        name (str|None, optional): Name for the operation (optional, default is None). For more information, please refer to :ref:`api_guide_Name`.

    Returns:
        Tensor. Output of Atanh operator, a Tensor with shape same as input
            (integer types are autocasted into float32).

    Examples:
        .. code-block:: python

            >>> import paddle

            >>> x = paddle.to_tensor([-0.4, -0.2, 0.1, 0.3])
            >>> out = paddle.atanh(x)
            >>> print(out)
            Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
            [-0.42364895, -0.20273255,  0.10033534,  0.30951962])
    """
    if in_dynamic_or_pir_mode():
        return _C_ops.atanh(x)
    else:
        check_variable_and_dtype(
            x,
            'x',
            [
                'float16',
                'uint16',
                'float32',
                'float64',
                'uint8',
                'int8',
                'int16',
                'int32',
                'int64',
                'complex64',
                'complex128',
            ],
            'atanh',
        )
        helper = LayerHelper('atanh', **locals())
        out = helper.create_variable_for_type_inference(dtype=x.dtype)
        helper.append_op(type='atanh', inputs={"X": x}, outputs={"Out": out})
        return out


def ceil(x: Tensor, name: str | None = None) -> Tensor:
    """

    Ceil Operator. Computes ceil of x element-wise.

    .. math::
        out = \\left \\lceil x \\right \\rceil

    Args:
        x (Tensor): Input of Ceil operator, an N-D Tensor, with data type float32, float64, float16, bfloat16,
            uint8, int8, int16, int32, int64.
        name (str|None, optional): Name for the operation (optional, default is None). For more information, please refer to :ref:`api_guide_Name`.

    Returns:
        Tensor. Output of Ceil operator, a Tensor with shape same as input
            (integer types are autocasted into float32).

    Examples:
        .. code-block:: python

            >>> import paddle

            >>> x = paddle.to_tensor([-0.4, -0.2, 0.1, 0.3])
            >>> out = paddle.ceil(x)
            >>> print(out)
            Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
            [-0., -0., 1. , 1. ])
    """
    if in_dynamic_or_pir_mode():
        return _C_ops.ceil(x)
    else:
        check_variable_and_dtype(
            x,
            'x',
            [
                'float16',
                'uint16',
                'float32',
                'float64',
                'uint8',
                'int8',
                'int16',
                'int32',
                'int64',
            ],
            'ceil',
        )
        helper = LayerHelper('ceil', **locals())
        out = helper.create_variable_for_type_inference(dtype=x.dtype)
        helper.append_op(type='ceil', inputs={"X": x}, outputs={"Out": out})
        return out


def cosh(x: Tensor, name: str | None = None) -> Tensor:
    """
    Cosh Activation Operator.

    Input range `(-inf, inf)`, output range `(1, inf)`.

    .. math::
       out = \\frac{exp(x)+exp(-x)}{2}

    Args:
        x (Tensor): Input of Cosh operator, an N-D Tensor, with data type float32, float64, float16, bfloat16,
            uint8, int8, int16, int32, int64, complex64 or complex128.
        name (str|None, optional): Name for the operation (optional, default is None). For more information, please refer to :ref:`api_guide_Name`.

    Returns:
        Tensor. Output of Cosh operator, a Tensor with shape same as input
            (integer types are autocasted into float32).

    Examples:
        .. code-block:: python

            >>> import paddle

            >>> x = paddle.to_tensor([-0.4, -0.2, 0.1, 0.3])
            >>> out = paddle.cosh(x)
            >>> print(out)
            Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
            [1.08107233, 1.02006674, 1.00500417, 1.04533851])
    """
    if in_dynamic_or_pir_mode():
        return _C_ops.cosh(x)
    else:
        check_variable_and_dtype(
            x,
            'x',
            [
                'float16',
                'uint16',
                'float32',
                'float64',
                'uint8',
                'int8',
                'int16',
                'int32',
                'int64',
                'complex64',
                'complex128',
            ],
            'cosh',
        )
        helper = LayerHelper('cosh', **locals())
        out = helper.create_variable_for_type_inference(dtype=x.dtype)
        helper.append_op(type='cosh', inputs={"X": x}, outputs={"Out": out})
        return out


def exp(x: Tensor, name: str | None = None) -> Tensor:
    """

    Computes exp of x element-wise with a natural number `e` as the base.

    .. math::
        out = e^x

    Args:
        x (Tensor): Input of Exp operator, an N-D Tensor, with data type int32, int64, bfloat16, float16, float32, float64, complex64 or complex128.
        name (str|None, optional): Name for the operation (optional, default is None). For more information, please refer to :ref:`api_guide_Name`.

    Returns:
        Tensor. Output of Exp operator, a Tensor with shape same as input.

    Examples:
        .. code-block:: python

            >>> import paddle

            >>> x = paddle.to_tensor([-0.4, -0.2, 0.1, 0.3])
            >>> out = paddle.exp(x)
            >>> print(out)
            Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
            [0.67032003, 0.81873077, 1.10517097, 1.34985888])
    """
    if in_dynamic_or_pir_mode():
        return _C_ops.exp(x)
    else:
        check_variable_and_dtype(
            x,
            'x',
            [
                'int32',
                'int64',
                'uint16',
                'float16',
                'float32',
                'float64',
                'complex64',
                'complex128',
            ],
            'exp',
        )
        helper = LayerHelper('exp', **locals())
        out = helper.create_variable_for_type_inference(dtype=x.dtype)
        helper.append_op(type='exp', inputs={"X": x}, outputs={"Out": out})
        return out


def expm1(x: Tensor, name: str | None = None) -> Tensor:
    """

    Expm1 Operator. Computes expm1 of x element-wise with a natural number :math:`e` as the base.

    .. math::
        out = e^x - 1

    Args:
        x (Tensor): Input of Expm1 operator, an N-D Tensor, with data type int32, int64, bfloat16, float16, float32, float64, complex64 or complex128.
        name (str|None, optional): Name for the operation (optional, default is None). For more information, please refer to :ref:`api_guide_Name`.

    Returns:
        Tensor. Output of Expm1 operator, a Tensor with shape same as input.

    Examples:
        .. code-block:: python

            >>> import paddle

            >>> x = paddle.to_tensor([-0.4, -0.2, 0.1, 0.3])
            >>> out = paddle.expm1(x)
            >>> print(out)
            Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
            [-0.32967997, -0.18126924,  0.10517092,  0.34985882])
    """
    if in_dynamic_or_pir_mode():
        return _C_ops.expm1(x)
    else:
        check_variable_and_dtype(
            x,
            'x',
            [
                'float16',
                'uint16',
                'float32',
                'float64',
                'int32',
                'int64',
                'complex64',
                'complex128',
            ],
            'expm1',
        )
        helper = LayerHelper('expm1', **locals())
        out = helper.create_variable_for_type_inference(dtype=x.dtype)
        helper.append_op(type='expm1', inputs={"X": x}, outputs={"Out": out})
        return out


def reciprocal(x: Tensor, name: str | None = None) -> Tensor:
    """

    Reciprocal Activation Operator.

    .. math::
        out = \\frac{1}{x}

    Args:
        x (Tensor): Input of Reciprocal operator, an N-D Tensor, with data type float32, float64, float16, bfloat16,
            uint8, int8, int16, int32, int64.
        name (str|None, optional): Name for the operation (optional, default is None). For more information, please refer to :ref:`api_guide_Name`.

    Returns:
        Tensor. Output of Reciprocal operator, a Tensor with shape same as input
            (integer types are autocasted into float32).

    Examples:
        .. code-block:: python

            >>> import paddle

            >>> x = paddle.to_tensor([-0.4, -0.2, 0.1, 0.3])
            >>> out = paddle.reciprocal(x)
            >>> print(out)
            Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
            [-2.50000000, -5.        ,  10.       ,  3.33333325])
    """
    if in_dynamic_or_pir_mode():
        return _C_ops.reciprocal(x)
    else:
        check_variable_and_dtype(
            x,
            'x',
            [
                'float16',
                'uint16',
                'float32',
                'float64',
                'uint8',
                'int8',
                'int16',
                'int32',
                'int64',
            ],
            'reciprocal',
        )
        helper = LayerHelper('reciprocal', **locals())
        out = helper.create_variable_for_type_inference(dtype=x.dtype)
        helper.append_op(
            type='reciprocal', inputs={"X": x}, outputs={"Out": out}
        )
        return out


def round(x: Tensor, decimals: int = 0, name: str | None = None) -> Tensor:
    """

    Round the values in the input to the nearest integer value.

    .. code-block:: text

        input:
          x.shape = [4]
          x.data = [1.2, -0.9, 3.4, 0.9]

        output:
          out.shape = [4]
          out.data = [1., -1., 3., 1.]

    Args:
        x (Tensor): Input of Round operator, an N-D Tensor, with data type bfloat16, int32, int64, float32, float64, float16, complex64 or complex128.
        decimals(int): Rounded decimal place (default: 0).
        name (str|None, optional): Name for the operation (optional, default is None). For more information, please refer to :ref:`api_guide_Name`.

    Returns:
        Tensor. Output of Round operator, a Tensor with shape same as input.

    Examples:
        .. code-block:: python

            >>> import paddle

            >>> x = paddle.to_tensor([-0.5, -0.2, 0.6, 1.5])
            >>> out = paddle.round(x)
            >>> print(out)
            Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
            [-0., -0.,  1.,  2.])
    """
    if in_dynamic_or_pir_mode():
        return _C_ops.round(x, decimals)
    else:
        check_variable_and_dtype(
            x,
            'x',
            [
                'float16',
                'uint16',
                'int32',
                'int64',
                'float32',
                'float64',
                'complex64',
                'complex128',
            ],
            'round',
        )
        helper = LayerHelper('round', **locals())
        attrs = {
            'decimals': int(decimals),
        }
        out = helper.create_variable_for_type_inference(dtype=x.dtype)
        helper.append_op(
            type='round', inputs={"X": x}, outputs={"Out": out}, attrs=attrs
        )
        return out


@inplace_apis_in_dygraph_only
def round_(x, decimals=0, name=None):
    r"""
    Inplace version of ``round`` API, the output Tensor will be inplaced with input ``x``.
    Please refer to :ref:`api_paddle_round`.
    """
    return _C_ops.round_(x, decimals)


def sinh(x: Tensor, name: str | None = None) -> Tensor:
    """
    Sinh Activation Operator.

    .. math::
       out = sinh(x)

    Args:
        x (Tensor): Input of Sinh operator, an N-D Tensor, with data type float32, float64, float16, bfloat16,
            uint8, int8, int16, int32, int64, complex64 or complex128.
        name (str|None, optional): Name for the operation (optional, default is None). For more information, please refer to :ref:`api_guide_Name`.

    Returns:
        Tensor. Output of Sinh operator, a Tensor with shape same as input
            (integer types are autocasted into float32).

    Examples:
        .. code-block:: python

            >>> import paddle

            >>> x = paddle.to_tensor([-0.4, -0.2, 0.1, 0.3])
            >>> out = paddle.sinh(x)
            >>> print(out)
            Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
            [-0.41075233, -0.20133601,  0.10016675,  0.30452031])
    """
    if in_dynamic_or_pir_mode():
        return _C_ops.sinh(x)
    else:
        check_variable_and_dtype(
            x,
            'x',
            [
                'float16',
                'uint16',
                'float32',
                'float64',
                'uint8',
                'int8',
                'int16',
                'int32',
                'int64',
                'complex64',
                'complex128',
            ],
            'sinh',
        )
        helper = LayerHelper('sinh', **locals())
        out = helper.create_variable_for_type_inference(dtype=x.dtype)
        helper.append_op(type='sinh', inputs={"X": x}, outputs={"Out": out})
        return out


def square(x: Tensor, name: str | None = None) -> Tensor:
    """
    Square each elements of the inputs.

    .. math::
       out = x^2

    Args:
        x (Tensor): Input of Square operator, an N-D Tensor, with data type int32, int64, float32, float64, float16, complex64 or complex128.
        name (str|None, optional): Name for the operation (optional, default is None). For more information, please refer to :ref:`api_guide_Name`.

    Returns:
        Tensor. Output of Square operator, a Tensor with shape same as input.

    Examples:
        .. code-block:: python

            >>> import paddle

            >>> x = paddle.to_tensor([-0.4, -0.2, 0.1, 0.3])
            >>> out = paddle.square(x)
            >>> print(out)
            Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
            [0.16000001, 0.04000000, 0.01000000, 0.09000000])
    """
    if in_dynamic_or_pir_mode():
        return _C_ops.square(x)
    else:
        check_variable_and_dtype(
            x,
            'x',
            [
                'int32',
                'int64',
                'float16',
                'float32',
                'float64',
                'complex64',
                'complex128',
            ],
            'square',
        )
        helper = LayerHelper('square', **locals())
        out = helper.create_variable_for_type_inference(dtype=x.dtype)
        helper.append_op(type='square', inputs={"X": x}, outputs={"Out": out})
        return out


def tan(x: Tensor, name: str | None = None) -> Tensor:
    """
    Tangent Operator. Computes tangent of x element-wise.

    Input range is `(k*pi-pi/2, k*pi+pi/2)` and output range is `(-inf, inf)`.

    .. math::
       out = tan(x)

    Args:
        x (Tensor): Input of Tan operator, an N-D Tensor, with data type float32, float64, float16,
            bfloat16, uint8, int8, int16, int32, int64, complex64 or complex128.
        name (str|None, optional): Name for the operation (optional, default is None). For more information, please refer to :ref:`api_guide_Name`.

    Returns:
        Tensor. Output of Tan operator, a Tensor with shape same as input
            (integer types are autocasted into float32).

    Examples:
        .. code-block:: python

            >>> import paddle

            >>> x = paddle.to_tensor([-0.4, -0.2, 0.1, 0.3])
            >>> out = paddle.tan(x)
            >>> print(out)
            Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
            [-0.42279324, -0.20271003,  0.10033467,  0.30933627])
    """
    if in_dynamic_or_pir_mode():
        return _C_ops.tan(x)
    else:
        check_variable_and_dtype(
            x,
            'x',
            [
                'float16',
                'uint16',
                'float32',
                'float64',
                'uint8',
                'int8',
                'int16',
                'int32',
                'int64',
                'complex64',
                'complex128',
            ],
            'tan',
        )
        helper = LayerHelper('tan', **locals())
        out = helper.create_variable_for_type_inference(dtype=x.dtype)
        helper.append_op(type='tan', inputs={"X": x}, outputs={"Out": out})
        return out


def erf(x: Tensor, name: str | None = None) -> Tensor:
    r"""
    The error function.
    For more details, see `Error function <https://en.wikipedia.org/wiki/Error_function>`_.

    Equation:
        ..  math::
            out = \frac{2}{\sqrt{\pi}} \int_{0}^{x}e^{- \eta^{2}}d\eta

    Args:
        x (Tensor): The input tensor, it's data type should be float32, float64, uint8, int8, int16, int32, int64.
        name (str|None, optional): Name for the operation (optional, default is None). For more information, please refer to :ref:`api_guide_Name`.

    Returns:
        Tensor. The output of Erf, dtype: float32 or float64 (integer types are autocasted into float32), shape: the same as the input.

    Examples:

        .. code-block:: python

            >>> import paddle

            >>> x = paddle.to_tensor([-0.4, -0.2, 0.1, 0.3])
            >>> out = paddle.erf(x)
            >>> print(out)
            Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
            [-0.42839241, -0.22270259,  0.11246292,  0.32862678])
    """
    if in_dynamic_or_pir_mode():
        return _C_ops.erf(x)

    locals_var = locals().copy()
    kwargs = {}
    for name, val in locals_var.items():
        if val is not None:
            kwargs[name] = val
    return generate_layer_fn('erf')(**kwargs)