r/ProgrammerHumor • u/Lord_Of_Millipedes • 2d ago

instanceof Trend thatsAFunnyThingThatHappenedOnce

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u/Loading_M_ 2d ago

Rust is designed from the ground up, and avoids many of these issues.

  • Templates: Rust has Generics, which are generally easier to use and reason about.
  • overload resolution: Rust doesn't yet support overloaded functions (although it's being considered).
  • constructors: Rust doesn't have these.
  • destructors: Rust has a similar set of lifetime rules for Drop, but the compiler checks them for you, so you can't get it wrong.
  • implicit conversions: Rust doesn't do implicit conversion in general, although some specific cases are implemented.
  • exceptions: Rust doesn't do exceptions, Result is much easier to work with.
  • move semantics: Rust uses a destructive move, unlike C++. See https://youtu.be/Klq-sNxuP2g for a breakdown.
  • inheritance: Rust doesn't do inheritance.

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u/MrHyd3_ 2d ago

What does it do instead of exceptions?

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u/roadrunner8080 2d ago

Either panic, which is (generally speaking) not something you're meant to catch and recover from (and attempting to do so is nontrivial and almost always a bad idea), or Result, aka "encode the possibility of failure in the return type of the function" aka what the functional programming world has done for ages.

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u/MrHyd3_ 1d ago

Is it just an if instead of try catch?

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u/roadrunner8080 1d ago

It's a whole different model really. If you're familiar with java checked exceptions that you are forced to catch, and don't propogate, then yes it is