error[E0642]: patterns aren't allowed in methods without bodies
  --> $DIR/E0642.rs:9:12
   |
LL |     fn foo((x, y): (i32, i32));
   |            ^^^^^^
   |
help: give this argument a name or use an underscore to ignore it
   |
LL |     fn foo(_: (i32, i32));
   |            ~

error[E0642]: patterns aren't allowed in methods without bodies
  --> $DIR/E0642.rs:11:12
   |
LL |     fn bar((x, y): (i32, i32)) {}
   |            ^^^^^^
   |
help: give this argument a name or use an underscore to ignore it
   |
LL |     fn bar(_: (i32, i32)) {}
   |            ~

error[E0642]: patterns aren't allowed in methods without bodies
  --> $DIR/E0642.rs:13:15
   |
LL |     fn method(S { .. }: S) {}
   |               ^^^^^^^^
   |
help: give this argument a name or use an underscore to ignore it
   |
LL |     fn method(_: S) {}
   |               ~

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0642`.