Rust by Example

dead_code

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();

}

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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.