Rust Error E0763: Byte Constant Ended Incorrectly

Understanding Rust Error E0763

Rust Error E0763 occurs when a byte constant is improperly ended. This error often arises due to a missing closing quote. In this article, we'll explore the error and provide examples to correct it.

Erroneous Code Example

#![allow(unused)]
fn main() {
  let c = b'a; // error!
}

In the above example, the byte constant is wrongly defined. The single quote used to define the byte constant is not properly terminated, causing Rust Error E0763.

Fixing Rust Error E0763

To correct Rust Error E0763, simply add the missing closing quote to the byte constant. Let's consider the following example:

#![allow(unused)]
fn main() {
  let c = b'a'; // ok!
}

By adding the missing closing quote, we've resolved Rust Error E0763. The byte constant is now correctly defined.

Additional Examples

Here are some additional examples to illustrate the proper definition and use of byte constants in Rust.

Example 1:

#![allow(unused)]
fn main() {
  let c1 = b'A'; // ok!
  let c2 = b'\n'; // ok!
}

Example 2:

#![allow(unused)]
fn main() {
  let byte_arr = [b'a', b'b', b'c']; // ok!
}

In both examples, the byte constants are correctly defined and terminated, ensuring no occurrence of Rust Error E0763.