Static rustc_lint_defs::builtin::PRIVATE_MACRO_USE

pub static PRIVATE_MACRO_USE: &Lint

The private_macro_use lint detects private macros that are imported with #[macro_use].

Example

// extern_macro.rs
macro_rules! foo_ { () => {}; }
use foo_ as foo;

// code.rs

#![deny(private_macro_use)]

#[macro_use]
extern crate extern_macro;

fn main() {
    foo!();
}

This will produce:

error: cannot find macro `foo` in this scope

Explanation

This lint arises from overlooking visibility checks for macros in an external crate.

This is a future-incompatible lint to transition this to a hard error in the future.