# context.rs - source
Source of the Rust file `/home/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/pyo3-0.13.2/src/class/context.rs`.
Keywords: rust, rustlang, rust-lang

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    // Copyright (c) 2017-present PyO3 Project and Contributors

    //! Context manager api
    //! Trait and support implementation for context manager api
    //!

    use crate::callback::IntoPyCallbackOutput;
    use crate::{PyClass, PyObject};

    /// Context manager interface
    #[allow(unused_variables)]
    pub trait PyContextProtocol<'p>: PyClass {
        fn __enter__(&'p mut self) -> Self::Result
        where
            Self: PyContextEnterProtocol<'p>,
        {
            unimplemented!()
        }

        fn __exit__(
            &'p mut self,
            exc_type: Option<Self::ExcType>,
            exc_value: Option<Self::ExcValue>,
            traceback: Option<Self::Traceback>,
        ) -> Self::Result
        where
            Self: PyContextExitProtocol<'p>,
        {
            unimplemented!()
        }
    }

    pub trait PyContextEnterProtocol<'p>: PyContextProtocol<'p> {
        type Result: IntoPyCallbackOutput<PyObject>;
    }

    pub trait PyContextExitProtocol<'p>: PyContextProtocol<'p> {
        type ExcType: crate::FromPyObject<'p>;
        type ExcValue: crate::FromPyObject<'p>;
        type Traceback: crate::FromPyObject<'p>;
        type Result: IntoPyCallbackOutput<PyObject>;
    }