public static ExpressionBuilder Create()
{
ExpressionBuilder builder = new ExpressionBuilder();
builder.AllExpressions = new List<MathExpression>();
builder.CurrentIndex = 0;
builder.InputText = String.Empty;
builder.SubExpression = new MathExpression(String.Empty);
return builder;
}
private void getExpressions(ExpressionBuilder expBuilder, ref int openedParanthesis)
{
while (expBuilder.ThereAreMoreChars())
{
char currentChar = expBuilder.GetCurrentChar();
if (currentChar == OPEN_SUBEXPRESSION)
{
openedParanthesis++;
getExpressions(expBuilder.ProcessNewSubExpression(),
ref openedParanthesis);
}
else if (currentChar == CLOSE_SUBEXPRESSION)
{
expBuilder.SubExpressionEndFound();
openedParanthesis--;
return;
}
else
expBuilder.AddSubExpressionChar();
}
expBuilder.SubExpressionEndFound();
}
public ExpressionBuilder ProcessNewSubExpression()
{
ExpressionBuilder builder = new ExpressionBuilder();
builder.InputText = _inputText;
builder.SubExpression = new MathExpression(String.Empty);
updateIndex();
return builder;
}