%Error: t/t_preproc_ifexpr_bad.v:12:14: `elsif with no matching `if
   12 | `elsif ( ONE )  // BAD: elsif without if
      |              ^
%Error: t/t_preproc_ifexpr_bad.v:13:1: `endif with no matching `if
   13 | `endif
      | ^~~~~~
%Error: t/t_preproc_ifexpr_bad.v:15:10: Syntax error in `ifdef () expression
   15 | `ifdef ( ) // BAD: Missing value
      |          ^
%Error: t/t_preproc_ifexpr_bad.v:18:17: Syntax error in `ifdef () expression
   18 | `ifdef ( && ZERO)  // BAD: Expr
      |                 ^
%Error: t/t_preproc_ifexpr_bad.v:21:18: Syntax error in `ifdef () expression
   21 | `ifdef ( ZERO && )  // BAD: Expr
      |                  ^
%Error: t/t_preproc_ifexpr_bad.v:24:10: Syntax error in `ifdef () expression; unexpected: 'TEXT'
   24 | `ifdef ( 1 )  // BAD: Constant
      |          ^
%Error: t/t_preproc_ifexpr_bad.v:24:12: Syntax error in `ifdef () expression
   24 | `ifdef ( 1 )  // BAD: Constant
      |            ^
%Error: t/t_preproc_ifexpr_bad.v:27:14: Syntax error in `ifdef () expression; unexpected: 'TEXT'
   27 | `ifdef ( ONE & ZERO)  // BAD: Operator
      |              ^
%Error: t/t_preproc_ifexpr_bad.v:30:10: Syntax error in `ifdef () expression; unexpected: 'TEXT'
   30 | `ifdef ( % )  // BAD: % is syntax error
      |          ^
%Error: t/t_preproc_ifexpr_bad.v:30:12: Syntax error in `ifdef () expression
   30 | `ifdef ( % )  // BAD: % is syntax error
      |            ^
%Error: t/t_preproc_ifexpr_bad.v:34:1: Expecting define name. Found: ENDIF
   34 | `endif
      | ^~~~~~
%Error: t/t_preproc_ifexpr_bad.v:36:1: Expecting define name. Found: IFDEF
   36 | `ifdef ( ONE // BAD: Missing paren
      | ^~~~~~
%Error: t/t_preproc_ifexpr_bad.v:37:1: Syntax error in `ifdef () expression; unexpected: 'TEXT'
   37 | `endif
      | ^
%Error: t/t_preproc_ifexpr_bad.v:40:1: EOF in unterminated preprocessor expression
%Error: t/t_preproc_ifexpr_bad.v:33:2: syntax error, unexpected ')'
   33 |  )  
      |  ^
%Error: Exiting due to