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I like that in C++11, you specify what should be captured and how it should be captured (by value or by reference).

• masklinn 10y ago
  Rust is the same, though it's less flexible[0]: it doesn't have capture lists, only [&] and [=], and they're very slightly different: * the default is similar to [&] but will infer the capture mode and use the "simplest" possible one (reference, mutable reference or value) depending on use on a per-value basis. * `move` closures are similar to [=] but will use Rust ownership semantics, so they will copy Copy values and move non-Copy values, it can capture external references (mutable or not) by value so if you needed to explicitly tweak your capture that's the one you'd use. [0] OTOH it's more readable
  • steveklabnik 10y ago
    I'm not sure that "less flexible" is accurate; we can accomplish the same things, but through different means.
    • masklinn 10y ago
      It might have been unclear, but I meant the closure syntax/capture itself is less flexible. You can get the same result e.g. using a move closure and declaring references outside the closure then capturing that by value, but I'm sure you could also do that in C++.
      • steveklabnik 10y ago
        Ah, yes. Cool :)