diff options
Diffstat (limited to 'src/test/ui/lint/unnecessary-extern-crate.rs')
-rw-r--r-- | src/test/ui/lint/unnecessary-extern-crate.rs | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/test/ui/lint/unnecessary-extern-crate.rs b/src/test/ui/lint/unnecessary-extern-crate.rs new file mode 100644 index 000000000..af2bd84bd --- /dev/null +++ b/src/test/ui/lint/unnecessary-extern-crate.rs @@ -0,0 +1,71 @@ +// edition:2018 + +#![deny(unused_extern_crates)] +#![feature(test, rustc_private)] + +extern crate libc; +//~^ ERROR unused extern crate +//~| HELP remove +extern crate libc as x; +//~^ ERROR unused extern crate +//~| HELP remove + +extern crate proc_macro; + +#[macro_use] +extern crate test; + +pub extern crate test as y; + +pub extern crate alloc; + +pub(crate) extern crate alloc as a; + +pub(crate) extern crate alloc as b; + +mod foo { + pub(in crate::foo) extern crate alloc as c; + + pub(super) extern crate alloc as d; + + extern crate libc; + //~^ ERROR unused extern crate + //~| HELP remove + + extern crate libc as x; + //~^ ERROR unused extern crate + //~| HELP remove + + pub extern crate test; + + pub extern crate test as y; + + mod bar { + extern crate libc; + //~^ ERROR unused extern crate + //~| HELP remove + + extern crate libc as x; + //~^ ERROR unused extern crate + //~| HELP remove + + pub(in crate::foo::bar) extern crate alloc as e; + + fn dummy() { + e::string::String::new(); + } + } + + fn dummy() { + c::string::String::new(); + d::string::String::new(); + } +} + + +fn main() { + a::string::String::new(); + b::string::String::new(); + + proc_macro::TokenStream::new(); +} |