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Diffstat (limited to 'src/test/ui/hygiene/prelude-import-hygiene.rs')
-rw-r--r-- | src/test/ui/hygiene/prelude-import-hygiene.rs | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/test/ui/hygiene/prelude-import-hygiene.rs b/src/test/ui/hygiene/prelude-import-hygiene.rs new file mode 100644 index 000000000..51e7bed65 --- /dev/null +++ b/src/test/ui/hygiene/prelude-import-hygiene.rs @@ -0,0 +1,29 @@ +// Make sure that attribute used when injecting the prelude are resolved +// hygienically. + +// check-pass +// aux-build:not-libstd.rs + +//revisions: rust2015 rust2018 +//[rust2018] edition:2018 + +// The prelude import shouldn't see these as candidates for when it's trying to +// use the built-in macros. +extern crate core; +use core::prelude::v1::test as prelude_import; +use core::prelude::v1::test as macro_use; + +// Should not be used for the prelude import - not a concern in the 2015 edition +// because `std` is already declared in the crate root. +#[cfg(rust2018)] +extern crate not_libstd as std; + +#[cfg(rust2018)] +mod x { + // The extern crate item should override `std` in the extern prelude. + fn f() { + std::not_in_lib_std(); + } +} + +fn main() {} |