src/attribute/unused.md

# `dead_code`

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

```rust,editable
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.

[lint]: https://en.wikipedia.org/wiki/Lint_%28software%29