RS.CLIPPY.ALMOST_COMPLETE_RANGE

Almost complete range

This checker is a Clippy lint created by The Rust Project Contributors. The documentation shown here is a copy of the original documentation for: almost_complete_range. Copyright ©2025 The Rust Team. All rights reserved.

What it does

Checks for ranges which almost include the entire range of letters from 'a' to 'z' or digits from '0' to '9', but don't because they're a half open range.

Why is this bad?

This (\'a\'..\'z\') is almost certainly a typo meant to include all letters.

Example

let _ = \'a\'..\'z\';

Use instead:

let _ = \'a\'..=\'z\';

Past names

almost_complete_letter_range

Configuration

msrv: The minimum rust version that the project supports. Defaults to the rust-version field in Cargo.toml

(default: current version)