C++20 Concepts Are Here in Visual Studio 2019 version 16.3

https://devblogs.microsoft.com/cppblog/c20-concepts-are-here-in-visual-studio-2019-version-16-3/

https://www.reddit.com/r/cpp/comments/d2alin/c20_concepts_in_visual_studio_2019_version_163/

Dropbox abandons C++, uses Swift, Kotlin, JavaScript and Electron instead

• Eyal Guthmann (Dropbox): The (not so) hidden cost of sharing code between iOS and Android

• Reddit: https://www.reddit.com/r/cpp/comments/cqft4t/dropbox_replaces_c_with_platformspecific_languages/

• HackerNews: https://news.ycombinator.com/item?id=20695806

  It’s possible we could have done a better job at leveraging open source C++ libraries, but the open source culture in the C++ development community was (is still?) not as strong as it is in the mobile development community <...>

  It seems like the real issue was that Dropbox lost all of their senior C++ engineers.

• The Register: Dropbox would rather write code twice than try to make C++ work on both iOS and Android

• Reddit: https://www.reddit.com/r/programming/comments/crunfh/dropbox_would_rather_write_code_twice_than_try_to/

Previously

• Djinni
• CppCon 2014: Alex Allain & Andrew Twyman "Practical Cross-Platform Mobile C++ Development
• CppCon 2017: Stephen Spann “Cross-Platform Apps with Dropbox’s Djinni...”

Unified function call

Approval tests

Also known as Golden Master Tests or Snapshot Testing (locking down current behaviour)

• CppOnSea 2019 - Clare Macrae - Quickly testing legacy code https://youtu.be/dtm8V3TIB6k

  • Slides https://slideshare.net/ClareMacrae

  • CppCast with Clare Macrae https://cppcast.com/clare-macrae/

    • r/cpp https://www.reddit.com/r/cpp/comments/ckzc11/cppcast_approval_tests_with_clare_macrae/

• Code https://github.com/approvals/ApprovalTests.cpp (Apache 2.0)

• Approval Tests Library - Capturing Human Intelligence [available for Java, C#, VB.Net, PHP, Ruby, Node.JS and Python] https://approvaltests.com/ by Llevelyn Falco

  • Supports Catch, Catch 2, Google Test, Okra

• Mutation tests: sabotage the code

  • Mutate++ https://github.com/nlohmann/mutate_cpp

Crash course in Qt for C++ developers

https://www.cleanqt.io/blog/crash-course-in-qt-for-c%2B%2B-developers,-part-1

Modern Qt Development: The Top 10 Tools You Should Be Using

https://blog.qt.io/blog/2018/10/12/modern-qt-development-top-10-tools-using/

https://www.reddit.com/r/cpp/comments/9njw5n/is_there_an_easytouse_gui_library/

CMake it modern using C++ and Qt

https://www.cleanqt.io/blog/cmake-it-modern-using-c%2B%2B-and-qt,-part-1

A new SQLite C++ wrapper

https://blog.trailofbits.com/2019/08/26/wrappers-delight/

https://www.reddit.com/r/cpp/comments/cxxk4b/a_new_c_sqlite_wrapper/

The Reddit thread also includes a heated discussion on how to handle errors and if exceptions are a good thing (eyeroll).

strong_typedef - Create distinct types for distinct purposes

Article by Anthony Williams

https://www.justsoftwaresolutions.co.uk/cplusplus/strong_typedef.html

https://github.com/anthonywilliams/strong_typedef

using transaction_id =
  jss::strong_typedef<struct transaction_tag, std::string>;

bool is_a_foo(transaction_id id)
{
  auto &s = id.underlying_value();
  return s.find("foo") != s.end();
}

Twitter: CppCon Bingo