• onlinepersona@programming.dev
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    7 months ago

    I’m not getting it. What’s the point? It seems very much like a cpp-ism where you can put const in so many places.

    const int n2 = 0;    // const object
    int const n3 = 0;    // const object (same as n2)
    // https://learn.microsoft.com/en-us/cpp/cpp/const-and-volatile-pointers?view=msvc-170
    const char *cpch;  // const variable cannot point to another pointer
    char * const pchc; // value of pointer is constant
    
    int f() const; // members cannot be modified in this, only read
    std::string const f(); // returns a constant
    

    Then there are constant expressions.

    Can anybody look at that and tell me it’s readable with a straight face? I hope they don’t start adding all this stuff to rust.

    Anti Commercial-AI license

    • Miaou@jlai.lu
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      7 months ago

      It can be used for producing const values in arbitrary context. Can basically be swapped for c++'s constexpr.

      C++'s const does not exist in rust (values are const by default).

    • Alex@programming.dev
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      6 months ago

      Nope. This little neat feature mainly is just necessary part of bigger one - const-generics with const bounds.