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error: proc macro functions may not be `extern "C"`
--> $DIR/signature.rs:10:1
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LL | pub unsafe extern "C" fn foo(a: i32, b: u32) -> u32 {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: proc macro functions may not be `unsafe`
--> $DIR/signature.rs:10:1
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LL | pub unsafe extern "C" fn foo(a: i32, b: u32) -> u32 {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: mismatched derive proc macro signature
--> $DIR/signature.rs:10:49
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LL | pub unsafe extern "C" fn foo(a: i32, b: u32) -> u32 {
| ^^^ found u32, expected type `proc_macro::TokenStream`
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= note: derive proc macros must have a signature of `fn(TokenStream) -> TokenStream`
error: mismatched derive proc macro signature
--> $DIR/signature.rs:10:33
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LL | pub unsafe extern "C" fn foo(a: i32, b: u32) -> u32 {
| ^^^ found i32, expected type `proc_macro::TokenStream`
|
= note: derive proc macros must have a signature of `fn(TokenStream) -> TokenStream`
error: mismatched derive proc macro signature
--> $DIR/signature.rs:10:38
|
LL | pub unsafe extern "C" fn foo(a: i32, b: u32) -> u32 {
| ^^^^^^ found unexpected argument
error: aborting due to 5 previous errors
|
