RS.CLIPPY.LEGACY_NUMERIC_CONSTANTS

Checks for usage of legacy std numeric constants and methods

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

What it does

Checks for usage of <integer>::max_value(), std::<integer>::MAX, std::<float>::EPSILON, etc.

Why is this bad?

All of these have been superseded by the associated constants on their respective types, such as i128::MAX. These legacy items may be deprecated in a future version of rust.

Example

let eps = std::f32::EPSILON;

Use instead:

let eps = f32::EPSILON;

Configuration

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

    (default: current version)