Clippy lint · Pedantic · checked with Clippy 0.1.99

clippy::macro_use_imports: Checks for #[macro_use] use

What it meansChecks for #[macro_use] use.... It is in the pedantic group and off by default.

Does it matter?

Since the Rust 2018 edition you can import macro’s directly, this is considered idiomatic.

Stricter lints with some false positives. Off by default; opt in with clippy::pedantic.

How to fix it

Clippy does not fix this one automatically (its suggestion may change behaviour, so it only shows it). Change the code by hand:

Flagged

#[macro_use]
extern crate some_crate;

fn main() {
    some_macro!();
}

Write this instead

use some_crate::some_macro;

fn main() {
    some_macro!();
}

Turn it off, or on

It is off by default. To use it, set it to warn or deny:

Whole crate (Cargo.toml)

[lints.clippy]
macro_use_imports = "warn"

In code

#![warn(clippy::macro_use_imports)]

One run

cargo clippy -- -W clippy::macro-use-imports

The [lints] table needs Rust 1.74 or newer. In a workspace, put it under [workspace.lints.clippy] and add [lints] workspace = true to each member.

Pedanticgroup

allowdefault level

nofixed by cargo clippy --fix

1.44.0added in Rust

Clippy's own documentation

What it does

Checks for #[macro_use] use....

Why is this bad?

Since the Rust 2018 edition you can import macro’s directly, this is considered idiomatic.

Example

#[macro_use]
extern crate some_crate;

fn main() {
    some_macro!();
}

Use instead:

use some_crate::some_macro;

fn main() {
    some_macro!();
}

From the Clippy lint list (0.1.99), part of the Rust project, MIT or Apache-2.0. Official entry.

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