NAME

       createablxorbinexpr - creates an 'xor' or 'xnor' operator expression.

SYNOPSYS

       #include "abl101.h"
       chain_list *createablxorbinexpr( Oper, Expr1, Expr2 )
         long        Oper;
         chain_list ∗Expr1;
         chain_list ∗Expr2;

PARAMETERS

       Oper                Operator ABL_XOR or ABL_NXOR.

       Expr1               First expression.

       Expr2               Second expression.

DESCRIPTION

       createablxorbinexpr  creates  a binary 'xor' or 'xnor' operator expression with the 'and',
       'or' form.  createablbinexpr simplifies eventually the  sub-expressions.   The  expression
       pointers Expr1 and Expr2 MUSTN'T be used after the call to this function.

RETURN VALUE

       createablxorbinexpr returns a pointer to the new operator expression.

ERRORS

       "ablcreate: bad operator xx !",
              Operator must be ABL_XOR or ABL_NXOR.

EXAMPLE

       #include "abl101.h"
          chain_list ∗ExprA;
          chain_list ∗ExprB;
          chain_list ∗ExprAxorB;
          ExprA = createablatom( "a" );
          ExprB = createablatom( "b" );
          ExprAxorB  = createablxorbinexpr( ABL_XOR, ExprA, ExprB );
          /* displays (a and (not b) or (b and (not a)) */
          viewablexpr( ExprAxorB, ABL_VIEW_VHDL );

SEE ALSO

       abl(1)      abl(1)      createablatom(3),      createabloper(3),      createablbinexpr(3),
       createablunaryexpr(3), createablnotexpr(3), addablhexpr(3), addablqexpr(3).