bool parseExpCandidate(ref string expCandidate, IList <ExpAtom> sequence)
{
int position = 0;
bool numberNow = true; // what to read from string: number or operation
Match match;
ExpAtom expAtom;
Console.WriteLine("Parsing expression candidate '{0}'", expCandidate);
do
{
Console.WriteLine("Retrieving first {1} from '{0}'", expCandidate.Substring(position), (numberNow ? "numeric" : "operation"));
match = (numberNow ? _regExpNumber : _regExpOperation).Match(expCandidate.Substring(position));
if (!match.Success)
{
Console.WriteLine("Matching failed");
break;
}
Console.WriteLine("Matched substring '{0}'", match.Value);
if (2 < match.Groups.Count || 1 != match.Groups[1].Captures.Count)
{
Console.WriteLine("Wrong match groups or captures count");
break;
}
Console.WriteLine("Captured substring '{0}'", match.Groups[1].Captures[0].Value);
expAtom = new ExpAtom(match.Groups[1].Captures[0].Value, (numberNow ? ExpAtomType.Numeric : ExpAtomType.Operation));
if (ExpAtomType.None == expAtom.AtomType)
{
Console.WriteLine("Convertation error");
break;
}
sequence.Add(expAtom);
position += match.Length;
numberNow ^= true;
} while(position < expCandidate.Length);
return(!numberNow && position == expCandidate.Length);
}
ExpAtom simplifyTriple(ExpAtom value1, ExpAtom operation, ExpAtom value2)
{
return(new ExpAtom(performCalculation(value1.Value, operation.Operation, value2.Value)));
}
