RS.CLIPPY.OPTION_AS_REF_DEREF

Using `as_ref().map(Deref::deref)`, which is more succinctly expressed as `as_deref()`

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

What it does

Checks for usage of _.as_ref().map(Deref::deref) or its aliases (such as String::as_str).

Why is this bad?

Readability, this can be written more concisely as _.as_deref().

Example

opt.as_ref().map(String::as_str)

Can be written as

opt.as_deref()

Configuration

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

(default: current version)