An introduction to the Rust ecosystem

Slides from my talk at Rust Warsaw #1.

Transcript

1. Zbigniew Siciarz @zsiciarz Rust Warsaw #1 2015-05-18
   

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2. http://mickmcdee.deviantart.com/art/Fungi-ecosystem-272294806
   

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3. Zbigniew Siciarz @zsiciarz Rust Warsaw #1 2015-05-18
   The language itself
   

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4. „a systems programming
   language that runs blazingly
   fast, prevents nearly all
   segfaults, and guarantees
   thread safety.”
   

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5. I think I named it after
   fungi. rusts are amazing
   creatures.
   https://www.flickr.com/photos/basf/4837713556/
   

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6. memory
   safety
   no data races
   zero-cost
   abstractions
   

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7. rustup.sh
   distro package
   Windows installer
   

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8. https://www.flickr.com/photos/tschaut/857853764/
   https://www.flickr.com/photos/101307973@N04/13254114423/
   https://www.flickr.com/photos/101307973@N04/17099131997/
   

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9. https://github.com/brson/multirust
   manages multiple toolchains
   local overrides
   

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10. Zbigniew Siciarz @zsiciarz Rust Warsaw #1 2015-05-18
    The package manager
    

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11. fetches dependencies
    compiles code
    runs build scripts
    

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12. [package]
    name = "rustwarsaw"
    version = "0.0.1"
    authors = ["Zbigniew Siciarz
    "]
    [dependencies]
    rustc-serialize = "~0.3.14"
    docopt = "~0.6.64"
    iron = "~0.1.17"
    mount = "~0.0.7"
    staticfile = "~0.0.2"
    

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13. unit tests
    integration tests
    doctests
    examples
    

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14. #[cfg(test)]
    mod test {
    #[test]
    fn test_solution() {
    assert_eq!(2 * 21, 42);
    }
    }
    

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15. uploads package to crates.io
    

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16. /// Gets the CPU clock frequency in MHz.
    ///
    /// The underlying implementation uses several methods to discover CPU
    /// speed, including direct measurement. If all these methods fail,
    function
    /// returns `None`.
    pub fn clock_frequency() -> Option {
    // ...
    }
    

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17. rustfmt?
    future!
    guidelines
    http://doc.rust-lang.org/1.0.0/style/
    

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18. Zbigniew Siciarz @zsiciarz Rust Warsaw #1 2015-05-18
    when stdlib doesn’t cut it
    

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19. #[derive(RustcDecodable, RustcEncodable)]
    struct Movie {
    title: String,
    pub_year: usize,
    }
    let mut reader = Reader::from_file(path).unwrap();
    for row in reader.decode() {
    let movie: Movie = row.unwrap();
    println!("{}", movie.title);
    }
    

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20. fn get_content(url: &str) -> hyper::Result {
    let mut client = Client::new();
    let mut response = try!(client.get(url).send());
    let mut buf = String::new();
    try!(response.read_to_string(&mut buf));
    Ok(buf)
    }
    println!("{:?}", get_content("http://www.google.com"));
    

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21. use hyper::server::{Request, Response};
    fn hello(_: Request, res: Response) {
    res.send(b"Hello Rust Warsaw!").unwrap();
    }
    fn main () {
    hyper::Server::http(hello).listen("127.0.0.1:3000");
    }
    

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22. let mut sha = Sha256::new();
    sha.input_str("Hello world!");
    println!("{}", sha.result_str());
    let mut cipher = aes::ctr(KeySize::KeySize128, &key,
    &nonce);
    let secret = "I like Nickelback";
    let mut out: Vec =
    repeat(0u8).take(secret.len()).collect();
    cipher.process(secret.as_bytes(), &mut out[..]);
    println!("Ciphertext: {}", out.to_base64(STANDARD));
    

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23. 3D game engine
    http://www.piston.rs/
    https://github.com/PistonDevelopers
    /piston-examples
    

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24. rusqlite
    postgres
    redis
    mysql
    

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25. anymap capnproto chrono conrod
    docopt fuse gl glutin html5ever
    image iron itertools nalgebra
    openssl quickcheck rand regex
    rustache rustless sodiumoxide
    ssh2 time winapi zmq ...
    

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26. Zbigniew Siciarz @zsiciarz Rust Warsaw #1 2015-05-18
    FFI to&from other languages
    

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27. #[link(name = "cpuid")]
    extern {
    pub fn cpuid_present() -> c_int;
    pub fn cpuid_lib_version() -> *const c_char;
    pub fn cpuid_error() -> *const c_char;
    // ...
    }
    pub fn is_present() -> bool {
    unsafe {
    ffi::cpuid_present() == 1
    }
    }
    

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28. extern crate libc;
    use std::ffi::CStr;
    use libc::c_char;
    #[no_mangle]
    pub extern "C" fn count_substrings(value: *const c_char,
    substr: *const c_char) -> i32 {
    let c_value = unsafe {
    CStr::from_ptr(value).to_bytes() };
    let c_substr = unsafe {
    CStr::from_ptr(substr).to_bytes() };
    // ...
    }
    

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29. #include
    #include
    int32_t count_substrings(const char* value, const char*
    substr);
    int main() {
    printf("%d\n", count_substrings("banana", "na"));
    return 0;
    }
    

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30. import ctypes
    library_name = "../target/debug/libstringtools.so"
    stringtools = ctypes.CDLL(library_name)
    print(stringtools.count_substrings(b"banana", b"na"))
    var ffi = require('ffi');
    var library_name = '../target/debug/libstringtools.so';
    var stringtools = ffi.Library(library_name, {
    'count_substrings': ['int', ['string', 'string']]
    });
    console.log(stringtools.count_substrings("banana",
    "na"));
    

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31. https://github.com/zsiciarz/rust-ffi-stringtools
    https://github.com/alexcrichton/rust-ffi-examples
    https://doc.rust-lang.org/book/ffi.html
    

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32. Zbigniew Siciarz @zsiciarz Rust Warsaw #1 2015-05-18
    Show me the real deal
    

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38. standard library docs
    rustbyexample.com
    users.rust-lang.org
    /r/rust
    #rustlang
    zsiciarz.github.io/24daysofrust
    

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39. Zbigniew Siciarz @zsiciarz Rust Warsaw #1 2015-05-18
    

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40. Zbigniew Siciarz @zsiciarz Rust Warsaw #1 2015-05-18
    

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