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You can use closures as functions with type inferred signatures

• bryanlarsen 4y ago
  Closures capture variables so have significant differences compared to inner functions. Capture can affect lifetimes so the difference is significant in Rust.
  • nicoburns 4y ago
    Closures don't have to capture variables. If they don't then they're equivalent to functions.
    • bryanlarsen 4y ago
      That's what I thought too, but I fixed some compiler errors by turning a closure into an inner function. Probably a PBKAC, but...
      • LegionMammal978 4y ago
        Perhaps it's due to the fact that you can't really have type-generic closures in Rust: once the compiler has inferred one type, the closure cannot be used with another type. In contrast, inner functions can have any number of additional type parameters.