Test_2.scala:2: error: cto may only be used as an argument to m
  M.cto // error
    ^
Test_2.scala:3: error: cto may only be used as an argument to m
  M.m(M.cto, ()) // error
        ^
Test_2.scala:5: error: cto may only be used as an argument to m
  M.cto // error
    ^
Test_2.scala:9: error: splice must be enclosed within a reify {} block
    val splice = expr.splice
                      ^
Test_2.scala:10: error: cannot use value except for signatures of macro implementations
    val value = expr.value
                     ^
5 errors found