diff options
Diffstat (limited to 'src/test/ui/lint/unused/lint-unused-extern-crate.rs')
-rw-r--r-- | src/test/ui/lint/unused/lint-unused-extern-crate.rs | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/test/ui/lint/unused/lint-unused-extern-crate.rs b/src/test/ui/lint/unused/lint-unused-extern-crate.rs new file mode 100644 index 000000000..d5e4da526 --- /dev/null +++ b/src/test/ui/lint/unused/lint-unused-extern-crate.rs @@ -0,0 +1,35 @@ +// aux-build:lint_unused_extern_crate.rs +// aux-build:lint_unused_extern_crate2.rs +// aux-build:lint_unused_extern_crate3.rs +// aux-build:lint_unused_extern_crate4.rs +// aux-build:lint_unused_extern_crate5.rs + +#![deny(unused_extern_crates)] +#![allow(unused_variables)] +#![allow(deprecated)] + +extern crate lint_unused_extern_crate5; //~ ERROR: unused extern crate + +pub extern crate lint_unused_extern_crate4; // no error, it is re-exported + +extern crate lint_unused_extern_crate3; // no error, it is used + +extern crate lint_unused_extern_crate2; // no error, the use marks it as used + // even if imported objects aren't used + +extern crate lint_unused_extern_crate as other; // no error, the use * marks it as used + +#[allow(unused_imports)] +use lint_unused_extern_crate2::foo as bar; + +use other::*; + +mod foo { + // Test that this is unused even though an earlier `extern crate` is used. + extern crate lint_unused_extern_crate2; //~ ERROR unused extern crate +} + +fn main() { + lint_unused_extern_crate3::foo(); + let y = foo(); +} |