Error code E0130
A pattern was declared as an argument in a foreign function declaration.
Erroneous code example:
#![allow(unused)] fn main() { extern "C" { fn foo((a, b): (u32, u32)); // error: patterns aren't allowed in foreign // function declarations } }
To fix this error, replace the pattern argument with a regular one. Example:
#![allow(unused)] fn main() { struct SomeStruct { a: u32, b: u32, } extern "C" { fn foo(s: SomeStruct); // ok! } }
Or:
#![allow(unused)] fn main() { extern "C" { fn foo(a: (u32, u32)); // ok! } }