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21 lines
818 B
Plaintext
21 lines
818 B
Plaintext
error[E0277]: expected a `Fn<(proc_macro::TokenStream,)>` closure, found `unsafe extern "C" fn(i32, u32) -> u32 {foo}`
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--> $DIR/signature.rs:10:1
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LL | / pub unsafe extern "C" fn foo(a: i32, b: u32) -> u32 {
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LL | |
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LL | | loop {}
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LL | | }
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| | ^
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| | |
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| |_call the function in a closure: `|| unsafe { /* code */ }`
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| required by a bound introduced by this call
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= help: the trait `Fn<(proc_macro::TokenStream,)>` is not implemented for fn item `unsafe extern "C" fn(i32, u32) -> u32 {foo}`
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= note: unsafe function cannot be called generically without an unsafe block
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note: required by a bound in `ProcMacro::custom_derive`
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--> $SRC_DIR/proc_macro/src/bridge/client.rs:LL:COL
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error: aborting due to previous error
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For more information about this error, try `rustc --explain E0277`.
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