Skip to content
By using Twitter’s services you agree to our Cookies Use. We and our partners operate globally and use cookies, including for analytics, personalisation, and ads.

This is the legacy version of twitter.com. We will be shutting it down on June 1, 2020. Please switch to a supported browser, or disable the extension which masks your browser. You can see a list of supported browsers in our Help Center.

  • Home Home Home, current page.
  • About

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @
  • Language: English
    • Bahasa Indonesia
    • Bahasa Melayu
    • Català
    • Čeština
    • Dansk
    • Deutsch
    • English UK
    • Español
    • Filipino
    • Français
    • Hrvatski
    • Italiano
    • Magyar
    • Nederlands
    • Norsk
    • Polski
    • Português
    • Română
    • Slovenčina
    • Suomi
    • Svenska
    • Tiếng Việt
    • Türkçe
    • Ελληνικά
    • Български език
    • Русский
    • Српски
    • Українська мова
    • עִבְרִית
    • العربية
    • فارسی
    • मराठी
    • हिन्दी
    • বাংলা
    • ગુજરાતી
    • தமிழ்
    • ಕನ್ನಡ
    • ภาษาไทย
    • 한국어
    • 日本語
    • 简体中文
    • 繁體中文
  • Have an account? Log in
    Have an account?
    · Forgot password?

    New to Twitter?
    Sign up
pcwalton's profile
Patrick Walton
Patrick Walton
Patrick Walton
@pcwalton

Tweets

Patrick Walton

@pcwalton

Research engineer at Mozilla

San Francisco, CA
pcwalton.github.io
Joined November 2009

Tweets

  • © 2020 Twitter
  • About
  • Help Center
  • Terms
  • Privacy policy
  • Imprint
  • Cookies
  • Ads info
Dismiss
Previous
Next

Go to a person's profile

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @

Promote this Tweet

Block

  • Tweet with a location

    You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more

    Your lists

    Create a new list


    Under 100 characters, optional

    Privacy

    Copy link to Tweet

    Embed this Tweet

    Embed this Video

    Add this Tweet to your website by copying the code below. Learn more

    Add this video to your website by copying the code below. Learn more

    Hmm, there was a problem reaching the server.

    By embedding Twitter content in your website or app, you are agreeing to the Twitter Developer Agreement and Developer Policy.

    Preview

    Why you're seeing this ad

    Log in to Twitter

    · Forgot password?
    Don't have an account? Sign up »

    Sign up for Twitter

    Not on Twitter? Sign up, tune into the things you care about, and get updates as they happen.

    Sign up
    Have an account? Log in »

    Two-way (sending and receiving) short codes:

    Country Code For customers of
    United States 40404 (any)
    Canada 21212 (any)
    United Kingdom 86444 Vodafone, Orange, 3, O2
    Brazil 40404 Nextel, TIM
    Haiti 40404 Digicel, Voila
    Ireland 51210 Vodafone, O2
    India 53000 Bharti Airtel, Videocon, Reliance
    Indonesia 89887 AXIS, 3, Telkomsel, Indosat, XL Axiata
    Italy 4880804 Wind
    3424486444 Vodafone
    » See SMS short codes for other countries

    Confirmation

     

    Welcome home!

    This timeline is where you’ll spend most of your time, getting instant updates about what matters to you.

    Tweets not working for you?

    Hover over the profile pic and click the Following button to unfollow any account.

    Say a lot with a little

    When you see a Tweet you love, tap the heart — it lets the person who wrote it know you shared the love.

    Spread the word

    The fastest way to share someone else’s Tweet with your followers is with a Retweet. Tap the icon to send it instantly.

    Join the conversation

    Add your thoughts about any Tweet with a Reply. Find a topic you’re passionate about, and jump right in.

    Learn the latest

    Get instant insight into what people are talking about now.

    Get more of what you love

    Follow more accounts to get instant updates about topics you care about.

    Find what's happening

    See the latest conversations about any topic instantly.

    Never miss a Moment

    Catch up instantly on the best stories happening as they unfold.

    1. Patrick Walton‏ @pcwalton 15 Mar 2019
      • Report Tweet
      • Report NetzDG Violation

      Actually hot take: Modern C++ is less safe than classic C++, which is less safe than C.

      15 replies 23 retweets 172 likes
      Show this thread
      Patrick Walton‏ @pcwalton 15 Mar 2019
      • Report Tweet
      • Report NetzDG Violation

      (Reason why: More C++ features add new, increasingly-less-obvious, ways to get use after free. In particular lambdas practically invite it, but there are lots of other such features.)

      12:05 PM - 15 Mar 2019
      • 7 Retweets
      • 109 Likes
      • Akhil Indurti defectivealtruist Frederick Ollinger mik Connor Richard Geldreich Harold Thétiot Experimental Web BrendanEich
      11 replies 7 retweets 109 likes
        1. New conversation
        2. Alon Zakai‏ @kripken 16 Mar 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @pcwalton

          new features add some risks, sure, but new safety benefits massively outweigh those in my experience. iow i'd bet real-world c++ code has gotten a lot safer, even if the language has more risks in it if you just count them.

          2 replies 0 retweets 5 likes
        3. Patrick Walton‏ @pcwalton 16 Mar 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @kripken

          I don’t really agree. Most of the new “safety” features (RAII, in particular) are of the form “protects against memory leaks”, which aren’t really safety features in the form of memory safety as memory leaks are safe.

          2 replies 0 retweets 0 likes
        4. 6 more replies
        1. New conversation
        2. Filip Jerzy Pizło‏ @filpizlo 15 Mar 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @pcwalton

          I use lambdas a lot. Can’t remember the last use after free from them. Also, do you seriously and honestly think that Rust is the best solution to use after free? Wouldn’t it better to have a solution that just worked in C++?

          2 replies 0 retweets 0 likes
        3. Patrick Walton‏ @pcwalton 16 Mar 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @filpizlo

          Yes, I think Rust is the best solution. I don't believe there can ever be a solution that "just works" in C++ for systematic reasons, without changing C++ so much it wouldn't be C++ anymore. Best you could do is lint against common pitfalls like the lifetime profile does.

          0 replies 0 retweets 0 likes
        4. End of conversation
        1. New conversation
        2. Patricia Aas‏ @pati_gallardo 15 Mar 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @pcwalton

          I’d love to read that rant in long form. 🤓

          1 reply 0 retweets 2 likes
        3. Patricia Aas‏ @pati_gallardo 15 Mar 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @pati_gallardo @pcwalton

          I’d also love to see lambda and string_view related vulnerabilities. I have been expecting them by now, honestly.

          2 replies 1 retweet 4 likes
        4. 2 more replies
        1. New conversation
        2. Ted Mielczarek‏ @TedMielczarek 15 Mar 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @pcwalton

          I hadn't had to touch any code using C++ lambdas but I saw some Gecko patches as they went by and I have no idea how you're supposed to use them safely.

          1 reply 0 retweets 4 likes
        3. Andrew McCreight‏ @amccreight 15 Mar 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @TedMielczarek @pcwalton

          There's static analysis that restricts the types that can be captured by lambdas, which catches some bugs.

          1 reply 0 retweets 3 likes
        4. 1 more reply
        1. Kyle Huey‏ @khuey_ 15 Mar 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @pcwalton

          C++ lambdas are terrifying.

          0 replies 0 retweets 6 likes
          Thanks. Twitter will use this to make your timeline better. Undo
          Undo
        1. New conversation
        2. James Tucker‏ @raggi 15 Mar 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @pcwalton

          It seems like a totally mixed bag. Having better integrated move semantics and so on help. As is almost always the case with closures, they lead to easy dire mistakes. They're almost always a misfeature unless very strictly checked. Their side effects in concurrency are awful

          1 reply 0 retweets 1 like
        3. Joe Groff‏ @jckarter 15 Mar 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @raggi @pcwalton

          My experience trying to use C++ move semantics to enforce linearity constraints is mixed. You don't gain much compile-time safety because moves are nondestructive and you need to support an invalid state. You at best get runtime checking, and you still need discipline to get it

          0 replies 0 retweets 3 likes
        4. End of conversation

      Loading seems to be taking a while.

      Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.

        Promoted Tweet

        false

        • © 2020 Twitter
        • About
        • Help Center
        • Terms
        • Privacy policy
        • Imprint
        • Cookies
        • Ads info