tests/ui/macros/cfg.stderr

error: macro requires a cfg-pattern as an argument
  --> $DIR/cfg.rs:2:5
   |
LL |     cfg!();
   |     ^^^^^^ cfg-pattern required

error[E0539]: malformed `cfg` macro input
  --> $DIR/cfg.rs:3:5
   |
LL |     cfg!(123);
   |     ^^^^^---^
   |     |    |
   |     |    expected a valid identifier here
   |     help: must be of the form: `cfg!(predicate)`
   |
   = note: for more information, visit <https://doc.rust-lang.org/reference/conditional-compilation.html#the-cfg-attribute>

error[E0539]: malformed `cfg` macro input
  --> $DIR/cfg.rs:4:5
   |
LL |     cfg!(foo = 123);
   |     ^^^^^^^^^^^---^
   |     |          |
   |     |          expected a string literal here
   |     help: must be of the form: `cfg!(predicate)`
   |
   = note: for more information, visit <https://doc.rust-lang.org/reference/conditional-compilation.html#the-cfg-attribute>

error: expected 1 cfg-pattern
  --> $DIR/cfg.rs:5:5
   |
LL |     cfg!(foo, bar);
   |     ^^^^^^^^^^^^^^

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0539`.