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Diffstat (limited to 'src/test/ui/proc-macro/signature.stderr')
| -rw-r--r-- | src/test/ui/proc-macro/signature.stderr | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/test/ui/proc-macro/signature.stderr b/src/test/ui/proc-macro/signature.stderr new file mode 100644 index 000000000..a6bd98ddb --- /dev/null +++ b/src/test/ui/proc-macro/signature.stderr @@ -0,0 +1,20 @@ +error[E0277]: expected a `Fn<(proc_macro::TokenStream,)>` closure, found `unsafe extern "C" fn(i32, u32) -> u32 {foo}` + --> $DIR/signature.rs:10:1 + | +LL | / pub unsafe extern "C" fn foo(a: i32, b: u32) -> u32 { +LL | | +LL | | loop {} +LL | | } + | |_^ call the function in a closure: `|| unsafe { /* code */ }` + | + = help: the trait `Fn<(proc_macro::TokenStream,)>` is not implemented for `unsafe extern "C" fn(i32, u32) -> u32 {foo}` + = note: unsafe function cannot be called generically without an unsafe block +note: required by a bound in `ProcMacro::custom_derive` + --> $SRC_DIR/proc_macro/src/bridge/client.rs:LL:COL + | +LL | expand: impl Fn(crate::TokenStream) -> crate::TokenStream + Copy, + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ProcMacro::custom_derive` + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0277`. |