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

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    use crate::ffi::object::*;
    use crate::ffi::pyport::Py_ssize_t;
    use std::os::raw::c_int;

    #[repr(C)]
    pub struct PyTupleObject {
        pub ob_base: PyVarObject,
        pub ob_item: [*mut PyObject; 1],
    }

    #[cfg_attr(windows, link(name = "pythonXY"))]
    extern "C" {
        #[cfg_attr(PyPy, link_name = "PyPyTuple_Type")]
        pub static mut PyTuple_Type: PyTypeObject;
        pub static mut PyTupleIter_Type: PyTypeObject;
    }

    #[inline]
    pub unsafe fn PyTuple_Check(op: *mut PyObject) -> c_int {
        PyType_FastSubclass(Py_TYPE(op), Py_TPFLAGS_TUPLE_SUBCLASS)
    }

    #[inline]
    pub unsafe fn PyTuple_CheckExact(op: *mut PyObject) -> c_int {
        (Py_TYPE(op) == &mut PyTuple_Type) as c_int
    }

    extern "C" {
        #[cfg_attr(PyPy, link_name = "PyPyTuple_New")]
        pub fn PyTuple_New(size: Py_ssize_t) -> *mut PyObject;
        #[cfg_attr(PyPy, link_name = "PyPyTuple_Size")]
        pub fn PyTuple_Size(arg1: *mut PyObject) -> Py_ssize_t;
        #[cfg_attr(PyPy, link_name = "PyPyTuple_GetItem")]
        pub fn PyTuple_GetItem(arg1: *mut PyObject, arg2: Py_ssize_t) -> *mut PyObject;
        #[cfg_attr(PyPy, link_name = "PyPyTuple_SetItem")]
        pub fn PyTuple_SetItem(arg1: *mut PyObject, arg2: Py_ssize_t, arg3: *mut PyObject) -> c_int;
        #[cfg_attr(PyPy, link_name = "PyPyTuple_GetSlice")]
        pub fn PyTuple_GetSlice(
            arg1: *mut PyObject,
            arg2: Py_ssize_t,
            arg3: Py_ssize_t,
        ) -> *mut PyObject;
        #[cfg_attr(PyPy, link_name = "PyPyTuple_Pack")]
        pub fn PyTuple_Pack(arg1: Py_ssize_t, ...) -> *mut PyObject;
        pub fn PyTuple_ClearFreeList() -> c_int;
    }

    /// Macro, trading safety for speed
    #[inline]
    #[cfg(not(Py_LIMITED_API))]
    pub unsafe fn PyTuple_GET_ITEM(op: *mut PyObject, i: Py_ssize_t) -> *mut PyObject {
        *(*(op as *mut PyTupleObject))
            .ob_item
            .as_ptr()
            .offset(i as isize)
    }

    #[inline]
    #[cfg(not(Py_LIMITED_API))]
    pub unsafe fn PyTuple_GET_SIZE(op: *mut PyObject) -> Py_ssize_t {
        Py_SIZE(op)
    }

    /// Macro, *only* to be used to fill in brand new tuples
    #[inline]
    #[cfg(not(Py_LIMITED_API))]
    pub unsafe fn PyTuple_SET_ITEM(op: *mut PyObject, i: Py_ssize_t, v: *mut PyObject) {
        *(*(op as *mut PyTupleObject))
            .ob_item
            .as_mut_ptr()
            .offset(i as isize) = v;
    }