error: free function without a body --> $DIR/fn-body-optional-semantic-fail.rs:4:5 | LL | fn f1(); | ^^^^^^^- | | | help: provide a definition for the function: `{ }` error: associated function in `impl` without body --> $DIR/fn-body-optional-semantic-fail.rs:14:9 | LL | fn f1(); | ^^^^^^^- | | | help: provide a definition for the function: `{ }` error: associated function in `impl` without body --> $DIR/fn-body-optional-semantic-fail.rs:19:9 | LL | fn f3(); | ^^^^^^^- | | | help: provide a definition for the function: `{ }` error: incorrect function inside `extern` block --> $DIR/fn-body-optional-semantic-fail.rs:25:12 | LL | extern "C" { | ---------- `extern` blocks define existing foreign functions and functions inside of them cannot have a body LL | fn f5(); // OK. LL | fn f6() {} | ^^ -- help: remove the invalid body: `;` | | | cannot have a body | = help: you might have meant to write a function accessible through FFI, which can be done by writing `extern fn` outside of the `extern` block = note: for more information, visit https://doc.rust-lang.org/std/keyword.extern.html error: aborting due to 4 previous errors