Fossil

  if( pExpr->pOp==0 ){
    /* A literal */
    rc = thSubstWord(interp, pExpr->zValue, pExpr->nValue);
  }else{
    int eArgType = 0;           /* Actual type of arguments */

    /* Argument values */
    int iLeft = 0;
    int iRight = 0;
    double fLeft;
    double fRight;

    /* Left and right arguments as strings */
    char *zLeft = 0; int nLeft = 0;
    char *zRight = 0; int nRight = 0;