Ben Chuanlong Du's Blog

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Function in Rust

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Tips

  1. Functions in a module is private by default. To make it public (so that it can called outside the module), you have to use the keyword pub.
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fn add1(x: i32, y: i32) -> i32 {
    x + y
}
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add1(1, 2)
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3
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let add2 = |x: i32, y: i32| x + y; 
add2(1, 2)

Sorry, the type [closure@src/lib.rs:112:12: 112:34] cannot currently be persisted

Function Overload

Rust does not support function overloading. There are multiple alternative ways to the OOP-style function overloading in Rust.

  1. Simply define different methods.
  2. Use trait to simulation function overloading.

Is there a simple way to overload functions?

Default/Optional Arguments

Rust does not support optinal arguments for Functions. For more discussions, please refer to Optional arguments in Rust .

References

Is there a simple way to overload functions?

Optional arguments in Rust

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