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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/errors/issue-99572-impl-trait-on-pointer.rs | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/test/ui/errors/issue-99572-impl-trait-on-pointer.rs b/src/test/ui/errors/issue-99572-impl-trait-on-pointer.rs new file mode 100644 index 000000000..272c6bd3f --- /dev/null +++ b/src/test/ui/errors/issue-99572-impl-trait-on-pointer.rs @@ -0,0 +1,25 @@ +// Emit additional suggestion to correct the trait implementation +// on a pointer +use std::{fmt, marker}; + +struct LocalType; + +impl fmt::Display for *mut LocalType { +//~^ ERROR only traits defined in the current crate can be implemented for arbitrary types +//~| NOTE impl doesn't use only types from inside the current crate +//~| NOTE `*mut LocalType` is not defined in the current crate because raw pointers are always foreign +//~| NOTE define and implement a trait or new type instead +//~| HELP consider introducing a new wrapper type + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + write!(f, "This not compile") + } +} + +impl<T> marker::Copy for *mut T { +//~^ ERROR only traits defined in the current crate can be implemented for arbitrary types +//~| NOTE impl doesn't use only types from inside the current crate +//~| NOTE `*mut T` is not defined in the current crate because raw pointers are always foreign +//~| NOTE define and implement a trait or new type instead +} + +fn main() {} |