public NumericExpression(NumericExpression prior)
 {
     this.prior = prior;
     number     = new NumberExpression(prior == null ? null : prior.GetNE());
     unit       = new UnitExpression(number);
 }
 public UnitExpression(NumberExpression currentNumber)
 {
     this.currentNumber = currentNumber;
 }
 public NumberExpression(NumberExpression prior)
 {
     this.prior = prior;
 }
 public NumberExpression(NumberExpression prior)
 {
     this.prior = prior;
 }
 public NumericExpression(NumericExpression prior)
 {
     this.prior = prior;
     number = new NumberExpression(prior == null ? null : prior.GetNE());
     unit = new UnitExpression(number);
 }
 public UnitExpression(NumberExpression currentNumber)
 {
     this.currentNumber = currentNumber;
 }