public static Block Cos(this Block block)
{
return(FunctionBlock.Create(block, FunctionType.Cos));
}
public static Block Tan(this Block block)
{
return(FunctionBlock.Create(block, FunctionType.Tan));
}
public static Block Parse(string str)
{
if (string.IsNullOrWhiteSpace(str))
{
return(null);
}
str = str.Trim();
foreach (var item in TwoOperatorBlock.priority)
{
if (str.IndexOfAny(item.ToCharArray()) != -1)
{
List <string> subjects = new List <string>();
List <char> oper = new List <char>();
int lastIndex = 0;
int startIndex = 0;
int Index = 0;
string sub;
int bracket = 0;
bool success = false;
while ((Index = str.IndexOfAny(item.ToCharArray(), startIndex)) != -1)
{
sub = str.Substring(startIndex, Index - startIndex);
//괄호가 있으면
bracket += sub.Count(e => e == '(');
bracket -= sub.Count(e => e == ')');
if (bracket == 0)
{
subjects.Add(str.Substring(lastIndex, Index - lastIndex));
oper.Add(str[Index]);
success = true;
lastIndex = Index + 1;
}
startIndex = Index + 1;
}
sub = str.Substring(startIndex, str.Length - startIndex);
//괄호가 있으면
bracket += sub.Count(e => e == '(');
bracket -= sub.Count(e => e == ')');
if (bracket == 0)
{
subjects.Add(str.Substring(lastIndex, str.Length - lastIndex));
}
else
{
throw new ArgumentException();
}
if (success)
{
Block block = Parse(subjects[0]);
for (int i = 0; i < oper.Count; i++)
{
char op = oper[i];
block = ParseConcat(block, Parse(subjects[i + 1]), op);
}
return(block);
}
}
}
if (str.EndsWith(")"))
{
string st = str.ToLower();
if (st.StartsWith("("))
{
return /*BracketBlock.Create(*/ (Block.Parse(str.Substring(1, str.Length - 2)) /*)*/);
}
else
{
Dictionary <FunctionType, string> funcName = new Dictionary <FunctionType, string>()
{
{ FunctionType.Sin, "sin" },
{ FunctionType.Cos, "cos" },
{ FunctionType.Tan, "tan" },
{ FunctionType.Root, "root" },
};
foreach (var item in funcName)
{
if (st.StartsWith(item.Value + "("))
{
string a = str.Substring(item.Value.Length + 1, str.Length - (2 + item.Value.Length));
FunctionType type = item.Key;
return(FunctionBlock.Create(Parse(a), type));
}
}
}
throw new ArgumentException();
}
if (char.IsLetter(str[0]) && !str.Any(e => char.IsWhiteSpace(e)))
{
return(UnknownBlock.Create(str));
}
return(ConstBlock.Create(Convert.ToDouble(str)));
}