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C, C++, Rust, Zig, …

• im3w1l 2y ago
  I'm not sure about Zig, but what strikes me about the others are that they change the type of the object. T vs T*. It would be kind of neat if you could have an annotation on the variable instead that didn't change the type. You could in C++ make a reference T& which is almost that - references behave identically to the real thing. But I think freeing the memory backing a reference is probably quite questionable?
• eikenberry 2y ago
  What's Zig's notation for it?
  • masklinn 2y ago
    Not doing anything, same as the other 3. Heap allocation is what requires requesting memory from an allocator.
    • eikenberry 2y ago
      Right.. been using GC languages to long. Everything allocated to the stack unless it is specifically allocated to the heap. I was stuck thinking about what the keywords were. But I'm still curious.. are there any GC languages that have a way to specify if something should go on the stack or the heap?
      • masklinn 2y ago
        > are there any GC languages that have a way to specify if something should go on the stack or the heap? I think only in the sense that some GCd language have value (stack) types as a separate hierarchy from heap types? E.g. structs in C# or Swift are stack-allocated (and value-identity, and copied) whereas classes are heap-allocated. Adding that for java is one of the goals of Project Valhalla I believe.
      • stassats 2y ago
        Common Lisp. The dynamic-extent declaration allows for stack allocation.