private SubExpression[] GetSubs()
{
var se = new List <SubExpression>();
var currentExpression = string.Empty;
for (var i = 0; i < ExpressionString.Length; i++)
{
if (ExpressionValues.IsMathSymbol(ExpressionString[i]))
{
if (!string.IsNullOrWhiteSpace(currentExpression))
{
se.Add(new SubExpression(currentExpression, this));
currentExpression = string.Empty;
}
se.Add(new SubExpression(ExpressionString[i].ToString(), this));
}
else
{
currentExpression += ExpressionString[i];
}
}
if (!string.IsNullOrWhiteSpace(currentExpression))
{
se.Add(new SubExpression(currentExpression, this));
}
return(se.ToArray());
}
public SubExpression[] GetSubExpressions()
{
if (string.IsNullOrWhiteSpace(ExpressionString))
{
return(null);
}
if (!ExpressionString.Contains('(') && !ExpressionString.Contains(')'))
{
return(GetSubs());
}
var subs = 0;
var currentExpression = string.Empty;
var result = new List <SubExpression>();
for (var i = 0; i < ExpressionString.Length; i++)
{
var c = ExpressionString[i];
if (c == '(')
{
subs++;
if (subs == 1)
{
if (!string.IsNullOrWhiteSpace(currentExpression))
{
result.Add(new SubExpression(currentExpression, this));
}
currentExpression = string.Empty;
}
else
{
currentExpression += c;
}
}
else if (c == ')')
{
subs--;
if (subs == 0)
{
if (!string.IsNullOrWhiteSpace(currentExpression))
{
result.Add(new SubExpression(currentExpression, this));
}
currentExpression = string.Empty;
}
else
{
currentExpression += c;
}
}
else if (ExpressionValues.IsMathSymbol(c) && subs == 0)
{
if (!string.IsNullOrWhiteSpace(currentExpression))
{
result.Add(new SubExpression(currentExpression, this));
}
currentExpression = string.Empty;
result.Add(new SubExpression(c.ToString(), this));
}
else
{
currentExpression += c;
}
}
if (!string.IsNullOrWhiteSpace(currentExpression))
{
result.Add(new SubExpression(currentExpression, this));
}
if (result.Count == 1 && result[0].ExpressionString == ExpressionString)
{
return(null);
}
return(result.ToArray());
}
