Smart Compiler

The Rust compiler does the most significant job to prevent errors in Rust programs. It analyzes the code at compile-time and issues warnings, if the code does not follow memory management rules or lifetime annotations correctly. For example,

💭 In the third post; RUST : THE TOUGH PART , we have discussed memory management concepts like ownership, borrowing, lifetimes and etc.

Rust compiler checks not only issues related with lifetimes or memory management and also common coding mistakes, like the following code.

Above error messages are very descriptive and we can easily see where is the error. But while we can not identify the issue via the error message, rustc --explain commands help us to identify the error type and how to solve it, by showing simple code samples which express the same problem and the solution we have to use. For example, rustc --explain E0571 shows the following output in the console.