error: rule #4 of macro `num` is never used
  --> $DIR/unused-macro-rules-decl.rs:11:5
   |
LL |     (four) => { 4 },
   |     ^^^^^^
   |
note: the lint level is defined here
  --> $DIR/unused-macro-rules-decl.rs:2:9
   |
LL | #![deny(unused_macro_rules)]
   |         ^^^^^^^^^^^^^^^^^^

error: rule #2 of macro `num` is never used
  --> $DIR/unused-macro-rules-decl.rs:9:5
   |
LL |     (two) => { 2 },
   |     ^^^^^

error: rule #3 of macro `num_rec` is never used
  --> $DIR/unused-macro-rules-decl.rs:31:5
   |
LL |     (three) => {
   |     ^^^^^^^

error: aborting due to 3 previous errors