You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: mod.rs
    path of file: ./repos/phaser/phaser/vendor/libc/src/unix/linux_like/linux/gnu/b64/x86_64
    
    the code of the file until where you have to start completion: //! x86_64-specific definitions for 64-bit linux-like values

pub type c_char = i8;
pub type wchar_t = i32;
pub type nlink_t = u64;
pub type blksize_t = i64;
pub type greg_t = i64;
pub type suseconds_t = i64;
pub type __u64 = ::c_ulonglong;

s! {
    pub struct sigaction {
        pub sa_sigaction: ::sighandler_t,
        pub sa_mask: ::sigset_t,
        #[cfg(target_arch = "sparc64")]
        _
    
            fn fmt(&self, f: &mut ::fmt::Formatter) -> ::fmt::Result {
                f.debug_struct("user_fpregs_struct")
                    .field("cwd", &self.cwd)
                    .field("ftw", &self.ftw)
                    .field("fop", &self.fop)
                    .field("rip", &self.rip)
                    .field("rdp", &self.rdp)
                    .field("mxcsr", &self.mxcsr)
                    .field("mxcr_mask", &self.mxcr_mask)
                    .field("st_space", &self.st_space)
                // FIXME: .field("xmm_space", &self.xmm_space)
                // Ignore padding field
                    .finish()
            }