Metadata

ID: rust-code-quality/approx-constant

Language: Rust

Severity: Error

Category: Error Prone

CWE: 682

Description

Using a hand-written approximation of a floating-point constant defined in std::f32::consts or std::f64::consts. The standard library constants carry the maximum precision available for the type so they should be used. For example std::f64::consts::PI

Non-Compliant Code Examples

// approximate PI
let a = 3.14;
// approximate E
let b = 2.7183_f64;

Compliant Code Examples

let a = std::f32::consts::PI;
let b = std::f64::consts::E;
let c = 3.1;

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