Verilator

Primitive definition:

primitive PRIM_DFFE (Q, ENA, D, CLK, CLRN, PRN, notifier);
   input D;   
   input CLRN;
   input PRN;
   input CLK;
   input ENA;
   input notifier;
   output Q; reg Q;
...

Primitive instantiation:

module dffe ( Q, CLK, ENA, D, CLRN, PRN );
   input D;
   input CLK;
   input CLRN;
   input PRN;
   input ENA;
   output Q;

   wire D_ipd;
   wire ENA_ipd;
   wire CLK_ipd;
   wire PRN_ipd;
   wire CLRN_ipd;

   buf (D_ipd, D);
   buf (ENA_ipd, ENA);
   buf (CLK_ipd, CLK);
   buf (PRN_ipd, PRN);
   buf (CLRN_ipd, CLRN);

   wire   legal;
   reg       viol_notifier;

   PRIM_DFFE ( Q, ENA_ipd, D_ipd, CLK_ipd, CLRN_ipd, PRN_ipd, viol_notifier );
...

error:

syntax error, unexpected '(', expecting IDENTIFIER