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    //! Platform-specific types, as defined by C.
    //!
    //! Code that interacts via FFI will almost certainly be using the
    //! base types provided by C, which aren't nearly as nicely defined
    //! as Rust's primitive types. This module provides types which will
    //! match those defined by C, so that code that interacts with C will
    //! refer to the correct types.

    #![stable(feature = "raw_os", since = "1.1.0")]

    #[doc(include = "char.md")]
    #[cfg(any(
        all(
            target_os = "linux",
            any(
                target_arch = "aarch64",
                target_arch = "arm",
                target_arch = "hexagon",
                target_arch = "powerpc",
                target_arch = "powerpc64",
                target_arch = "s390x",
                target_arch = "riscv64"
            )
        ),
        all(target_os = "android", any(target_arch = "aarch64", target_arch = "arm")),
        all(target_os = "l4re", target_arch = "x86_64"),
        all(
            target_os = "freebsd",
            any(
                target_arch = "aarch64",
                target_arch = "arm",
                target_arch = "powerpc",
                target_arch = "powerpc64"
            )
        ),
        all(
            target_os = "netbsd",
            any(target_arch = "aarch64", target_arch = "arm", target_arch = "powerpc")
        ),
        all(target_os = "openbsd", target_arch = "aarch64"),
        all(
            target_os = "vxworks",
            any(
                target_arch = "aarch64",
                target_arch = "arm",
                target_arch = "powerpc64",
                target_arch = "powerpc"
            )
        ),
        all(target_os = "fuchsia", target_arch = "aarch64")
    ))]
    #[stable(feature = "raw_os", since = "1.1.0")]
    pub type c_char = u8;
    #[doc(include = "char.md")]
    #[cfg(not(any(
        all(
            target_os = "linux",
            any(
                target_arch = "aarch64",
                target_arch = "arm",
                target_arch = "hexagon",
                target_arch = "powerpc",
                target_arch = "powerpc64",
                target_arch = "s390x",
                target_arch = "riscv64"
            )
        ),
        all(target_os = "android", any(target_arch = "aarch64", target_arch = "arm")),
        all(target_os = "l4re", target_arch = "x86_64"),
        all(
            target_os = "freebsd",
            any(
                target_arch = "aarch64",
                target_arch = "arm",
                target_arch = "powerpc",
                target_arch = "powerpc64"
            )
        ),
        all(
            target_os = "netbsd",
            any(target_arch = "aarch64", target_arch = "arm", target_arch = "powerpc")
        ),
        all(target_os = "openbsd", target_arch = "aarch64"),
        all(
            target_os = "vxworks",
            any(
                target_arch = "aarch64",
                target_arch = "arm",
                target_arch = "powerpc64",
                target_arch = "powerpc"
            )
        ),
        all(target_os = "fuchsia", target_arch = "aarch64")
    )))]
    #[stable(feature = "raw_os", since = "1.1.0")]
    pub type c_char = i8;
    #[doc(include = "schar.md")]
    #[stable(feature = "raw_os", since = "1.1.0")]
    pub type c_schar = i8;
    #[doc(include = "uchar.md")]
    #[stable(feature = "raw_os", since = "1.1.0")]
    pub type c_uchar = u8;
    #[doc(include = "short.md")]
    #[stable(feature = "raw_os", since = "1.1.0")]
    pub type c_short = i16;
    #[doc(include = "ushort.md")]
    #[stable(feature = "raw_os", since = "1.1.0")]
    pub type c_ushort = u16;
    #[doc(include = "int.md")]
    #[stable(feature = "raw_os", since = "1.1.0")]
    pub type c_int = i32;
    #[doc(include = "uint.md")]
    #[stable(feature = "raw_os", since = "1.1.0")]
    pub type c_uint = u32;
    #[doc(include = "long.md")]
    #[cfg(any(target_pointer_width = "32", windows))]
    #[stable(feature = "raw_os", since = "1.1.0")]
    pub type c_long = i32;
    #[doc(include = "ulong.md")]
    #[cfg(any(target_pointer_width = "32", windows))]
    #[stable(feature = "raw_os", since = "1.1.0")]
    pub type c_ulong = u32;
    #[doc(include = "long.md")]
    #[cfg(all(target_pointer_width = "64", not(windows)))]
    #[stable(feature = "raw_os", since = "1.1.0")]
    pub type c_long = i64;
    #[doc(include = "ulong.md")]
    #[cfg(all(target_pointer_width = "64", not(windows)))]
    #[stable(feature = "raw_os", since = "1.1.0")]
    pub type c_ulong = u64;
    #[doc(include = "longlong.md")]
    #[stable(feature = "raw_os", since = "1.1.0")]
    pub type c_longlong = i64;
    #[doc(include = "ulonglong.md")]
    #[stable(feature = "raw_os", since = "1.1.0")]
    pub type c_ulonglong = u64;
    #[doc(include = "float.md")]
    #[stable(feature = "raw_os", since = "1.1.0")]
    pub type c_float = f32;
    #[doc(include = "double.md")]
    #[stable(feature = "raw_os", since = "1.1.0")]
    pub type c_double = f64;

    #[stable(feature = "raw_os", since = "1.1.0")]
    #[doc(no_inline)]
    pub use core::ffi::c_void;

    #[cfg(test)]
    #[allow(unused_imports)]
    mod tests {
        use crate::any::TypeId;
        use crate::mem;

        macro_rules! ok {
            ($($t:ident)*) => {$(
                assert!(TypeId::of::<libc::$t>() == TypeId::of::<raw::$t>(),
                        "{} is wrong", stringify!($t));
            )*}
        }

        #[test]
        fn same() {
            use crate::os::raw;
            ok!(c_char c_schar c_uchar c_short c_ushort c_int c_uint c_long c_ulong
                c_longlong c_ulonglong c_float c_double);
        }
    }