private List <IExpression> GetExpressions(AliasMapper aliasMap, IDecimalConverter converter, MetalMapper metalMap, ExpressionValidationHelper helper)
        {
            List <IExpression> expressions = new List <IExpression>();

            expressions.Add(new AliasExpression(aliasMap));
            expressions.Add(new UnitExpression(aliasMap, metalMap, converter, helper));
            expressions.Add(new AliasQuestionExpression(aliasMap, converter, helper));
            expressions.Add(new UnitQuestionExpression(aliasMap, metalMap, converter, helper));
            expressions.Add(new MetalExpression(aliasMap, metalMap, converter, helper));

            return(expressions);
        }
 public ExpressionParser(AliasMapper aliasMap, IDecimalConverter converter, MetalMapper metalMap)
 {
     helper      = new ExpressionValidationHelper(aliasMap, metalMap);
     expressions = GetExpressions(aliasMap, converter, metalMap, helper);
 }