Why I don't spend time with Modern C++ anymore

Post by gaius » Wed, May 18, 2016, 11:51 AM UTC

justsaysmthng wrote: post #49

HFT is a pretty limited and extreme application case. From what I understand - everything is not enough for HFT - network cards, kernel drivers, cables, etc. You have milliseconds (edit: nanoseconds !) to receive, process and push your orders before someone else does it and gets the prize. It's an arms race between technologists for the purpose of making a small number of people rich. I doubt that these requirements…

Post by ygra » Wed, May 18, 2016, 11:53 AM UTC

Ygg2 wrote: post #48

jonathankoren wrote: post #33

I know why I don't like C++ anymore, it's just no fun.Its slow to compile, the errors are like 6 lines long full of template and class hierarchy that makes it hard to understand what exactly happened, and then of course there's the common coding shortcut of declaring everything auto. (What type is this list? I don't know, it's auto all the way down.) Then there's the whole thing about making constructors, but leaving…

I had to write C++ yesterday and hated every second of it, from the clunky header files, to the errors that make no sense, to the can't make a cyclic dependency between classes i.e. class A { B: b} class B { a: A} Long story short - I was to create a wrapper around a Poco::Runnable, so you can use the wrapper as a Poco::Runnable (don't ask why, it's TEH LAW) but without extending it.

    class B;
    class A {
      B* b;
    }
    class B {
      A* a;
    }

    struct A {
      B b;
    }
    struct B {
      A a;
    }

    test.cs(2,5): error CS0523: Struct member 'A.b' of type 'B' causes a cycle in the struct layout
    test.cs(6,5): error CS0523: Struct member 'B.a' of type 'A' causes a cycle in the struct layout

    class A {
      B b;
    }
    class B {
      A a;
    }

Post by humanrebar » Wed, May 18, 2016, 11:54 AM UTC

Ygg2 wrote: post #48

jonathankoren wrote: post #33

I know why I don't like C++ anymore, it's just no fun.Its slow to compile, the errors are like 6 lines long full of template and class hierarchy that makes it hard to understand what exactly happened, and then of course there's the common coding shortcut of declaring everything auto. (What type is this list? I don't know, it's auto all the way down.) Then there's the whole thing about making constructors, but leaving…

I had to write C++ yesterday and hated every second of it, from the clunky header files, to the errors that make no sense, to the can't make a cyclic dependency between classes i.e. class A { B: b} class B { a: A} Long story short - I was to create a wrapper around a Poco::Runnable, so you can use the wrapper as a Poco::Runnable (don't ask why, it's TEH LAW) but without extending it.

    class A; class B; // 'forward declaration' if you want to google
    class A { unique_ptr b; };
    class B { unique_ptr a; };