What if anything have we learned from C++? [video]

Re:What if anything have we learned from C++? [video] by bluetomcat on Friday July 24, 2015 @06:42AM (#9941080)

Using statement expressions and the typeof extension, you are able to write function-like, type-generic, scope-insensitive macros like this one:

    #define MAX(a,b) ({ \
        typeof (a) _a = (a); \
        typeof (b) _b = (b); \
        _a > _b ? _a : _b; \
    })

The inability to write template functions can be compensated by designing your function so that it takes a function pointer where the type-specific action occurs.

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Re:What if anything have we learned from C++? [video] by nly on Friday July 24, 2015 @07:55AM (#9941308)

Your MAX has no respect for namespaces or scopes. A real world macro is probably going to be called MYLIBRARY_MAX to avoid this. Secondly the C++ lambda solution is just easier to read.

    auto max = [](auto a, auto b) { 
        return (a > b) ? a : b;
    };

    max (3.1415, 42); // returns double
    max (42ul, 78u); // returns unsigned long
    max (17, 16); // returns int

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Re:What if anything have we learned from C++? [video] by f00fc0d3 on Friday July 24, 2015 @07:25AM (#9941194)

Typeof is not standard and many DSP compilers do not implement that. Secondly I meant max search in array, not between to scalar values which is trivial. I really don't want to have for(...) inlined everywhere.

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