error: passing a unit value to a function
  --> $DIR/unit_arg.rs:23:9
   |
LL |     foo({});
   |         ^^
   |
   = note: `-D clippy::unit-arg` implied by `-D warnings`
help: if you intended to pass a unit value, use a unit literal instead
   |
LL |     foo(());
   |         ^^

error: passing a unit value to a function
  --> $DIR/unit_arg.rs:24:9
   |
LL |       foo({
   |  _________^
LL | |         1;
LL | |     });
   | |_____^
help: if you intended to pass a unit value, use a unit literal instead
   |
LL |     foo(());
   |         ^^

error: passing a unit value to a function
  --> $DIR/unit_arg.rs:27:9
   |
LL |     foo(foo(1));
   |         ^^^^^^
help: if you intended to pass a unit value, use a unit literal instead
   |
LL |     foo(());
   |         ^^

error: passing a unit value to a function
  --> $DIR/unit_arg.rs:28:9
   |
LL |       foo({
   |  _________^
LL | |         foo(1);
LL | |         foo(2);
LL | |     });
   | |_____^
help: if you intended to pass a unit value, use a unit literal instead
   |
LL |     foo(());
   |         ^^

error: passing a unit value to a function
  --> $DIR/unit_arg.rs:32:10
   |
LL |     foo3({}, 2, 2);
   |          ^^
help: if you intended to pass a unit value, use a unit literal instead
   |
LL |     foo3((), 2, 2);
   |          ^^

error: passing a unit value to a function
  --> $DIR/unit_arg.rs:34:11
   |
LL |       b.bar({
   |  ___________^
LL | |         1;
LL | |     });
   | |_____^
help: if you intended to pass a unit value, use a unit literal instead
   |
LL |     b.bar(());
   |           ^^

error: aborting due to 6 previous errors