System.Linq.Dynamic.ExpressionParser.EqualizeTypesAndCombine C# (CSharp) Method

		private Expression EqualizeTypesAndCombine(Expression expr1, Expression expr2, int errorPos, Func<Expression, Expression, Expression> combineResults)
		{
			if (expr1.Type != expr2.Type)
			{
				Expression expr1As2 = expr2 != NullLiteral ? PromoteExpression(expr1, expr2.Type, true) : null;
				Expression expr2As1 = expr1 != NullLiteral ? PromoteExpression(expr2, expr1.Type, true) : null;
				if (expr1As2 != null && expr2As1 == null)
				{
					expr1 = expr1As2;
				}
				else if (expr2As1 != null && expr1As2 == null)
				{
					expr2 = expr2As1;
				}
				else
				{
					string type1 = expr1 != NullLiteral ? expr1.Type.Name : "null";
					string type2 = expr2 != NullLiteral ? expr2.Type.Name : "null";
					if (expr1As2 != null)
						throw ParseError(errorPos, Res.BothTypesConvertToOther(type1, type2));
					throw ParseError(errorPos, Res.NeitherTypeConvertsToOther(type1, type2));
				}
			}

			return combineResults(expr1, expr2);
		}