Static rustc_lint_defs::builtin::MACRO_EXPANDED_MACRO_EXPORTS_ACCESSED_BY_ABSOLUTE_PATHS

pub static MACRO_EXPANDED_MACRO_EXPORTS_ACCESSED_BY_ABSOLUTE_PATHS: &'static Lint

The macro_expanded_macro_exports_accessed_by_absolute_paths lint detects macro-expanded macro_export macros from the current crate that cannot be referred to by absolute paths.

Example

macro_rules! define_exported {
    () => {
        #[macro_export]
        macro_rules! exported {
            () => {};
        }
    };
}

define_exported!();

fn main() {
    crate::exported!();
}

{{produces}}

Explanation

The intent is that all macros marked with the #[macro_export] attribute are made available in the root of the crate. However, when a macro_rules! definition is generated by another macro, the macro expansion is unable to uphold this rule. This is a future-incompatible lint to transition this to a hard error in the future. See issue #53495 for more details.