Clippy lint · Cargo · checked with Clippy 0.1.99

clippy::wildcard_dependencies: Checks for wildcard dependencies in the Cargo.toml

What it meansChecks for wildcard dependencies in the Cargo.toml. It is in the cargo group and off by default.

Does it matter?

As the edition guide says, it is highly unlikely that you work with any possible version of your dependency, and wildcard dependencies would cause unnecessary breakage in the ecosystem.

Checks on Cargo.toml metadata. Off by default.

How to fix it

Clippy does not fix this one automatically. Change the code by hand:

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]
wildcard_dependencies = "warn"

In code

#![warn(clippy::wildcard_dependencies)]

One run

cargo clippy -- -W clippy::wildcard-dependencies

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.

Cargogroup

allowdefault level

nofixed by cargo clippy --fix

1.32.0added in Rust

Clippy's own documentation

What it does

Checks for wildcard dependencies in the Cargo.toml.

Why is this bad?

As the edition guide says, it is highly unlikely that you work with any possible version of your dependency, and wildcard dependencies would cause unnecessary breakage in the ecosystem.

Example

[dependencies]
regex = "*"

Use instead:

[dependencies]
some_crate_1 = "~1.2.3"

some_crate_2 = "=1.2.3"

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

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