public static Equation ParseEquation(string input)
{
if (string.IsNullOrWhiteSpace(input))
{
throw new ArgumentException($"{nameof(input)} cannot be null, empty or white space.");
}
if (!input.Any(c => Types.Comparison.Contains(c)))
{
throw new ArgumentException("An Equation contains comparison symbols. You want an Expression.");
}
int index = input.IndexOfAny(Types.Comparison.ToArray());
string leftExpression = input.Substring(0, index);
string comparison = input.ElementAt(index).ToString();
if (Types.Comparison.Contains(input.ElementAt(index + 1)))
{
comparison += input.ElementAt(index + 1).ToString();
index += 1;
}
string rightExpression = input.Substring(index + 1);
ComparisonType compareType = ConvertTo.ComparisonTypeEnum(comparison);
Expression lhs = MathParser.ParseExpression(leftExpression);
Expression rhs = MathParser.ParseExpression(rightExpression);
Equation result = new Equation(lhs, compareType, rhs);
return(result);
}
public Problem(string[] statements)
{
Statements = new List <ISentence>();
if (statements == null || statements.Length < 1)
{
throw new ArgumentException("You must pass at least one statement.");
}
_statements = statements;
Statements = _statements.Select(s => MathParser.ParseSentence(s)).ToList();
}
public static ISentence ParseSentence(string input)
{
if (string.IsNullOrWhiteSpace(input))
{
throw new ArgumentException();
}
if (input.Any(c => Types.Comparison.Contains(c)))
{
return((ISentence)MathParser.ParseEquation(input));
}
else
{
return((ISentence)MathParser.ParseExpression(input));
}
}