Rust Error E0415: Duplicate Parameter Names

Understanding Rust Error E0415

Rust Error E0415 occurs when more than one function parameter has the same name. This conflicts with Rust's strict rules, which require unique parameter names to avoid ambiguity.

Example of Erroneous Code

The following code example demonstrates how Rust Error E0415 is triggered:

```rust
#![allow(unused)]
fn main() {
    fn foo(f: i32, f: i32) {} // error: identifier `f` is bound more than
                              // once in this parameter list
}
```

In the above code snippet, the function `foo` has two parameters with the same name `f`. This will lead to Rust Error E0415.

Solution for Rust Error E0415

To fix Rust Error E0415, ensure that each parameter of a function has a unique name. Check for any misspelled parameter names or accidental duplicated names.

Example of Corrected Code

Here's a corrected version of the previous example with unique parameter names:

```rust
#![allow(unused)]
fn main() {
    fn foo(f: i32, g: i32) {} // ok!
}
```

In this corrected code snippet, the function `foo` now has two distinct parameters: `f` and `g`. This resolves Rust Error E0415.

Additional Tips