rust/tests/ui/conditional-compilation/cfg-attr-empty-is-unused.rs
2023-01-11 09:32:08 +00:00

14 lines
320 B
Rust

// Check that `#[cfg_attr($PREDICATE,)]` triggers the `unused_attribute` lint.
// compile-flags: --cfg TRUE
#![deny(unused)]
#[cfg_attr(FALSE,)] //~ ERROR `#[cfg_attr]` does not expand to any attributes
fn _f() {}
#[cfg_attr(TRUE,)] //~ ERROR `#[cfg_attr]` does not expand to any attributes
fn _g() {}
fn main() {}