Rust by Example

8.1 Unused

The compiler provides a dead_code lint that will warn about unused functions. An attribute can be used to disable the lint.

fn used_function() {} // `#[allow(dead_code)]` is an attribute that disables the `dead_code` lint #[allow(dead_code)] fn unused_function() {} fn noisy_unused_function() {} // FIXME ^ Add an attribute to suppress the warning fn main() { used_function(); }

Note that in real programs, you should eliminate dead code. In these examples we'll allow dead code in some places because of the interactive nature of the examples.