internal override bool TryGetToken(ref string text, out TokenBase token, bool requireReturnValue = true)
{
token = null;
string temp = text;
var op = default(Operator);
if (temp.Length < 2)
{
return(false);
}
if (temp[0] != '=')
{
if (temp[1] != '=' || temp.Length < 3)
{
return(false);
}
for (int i = (int)Operator.Multiply; i <= (int)Operator.Subtract; ++i)
{
if (EquationTokenizer.representations[i][0] == temp[0])
{
op = (Operator)i;
}
}
for (int i = (int)Operator.BitwiseAnd; i <= (int)Operator.BitwiseXor; ++i)
{
if (EquationTokenizer.representations[i][0] == temp[0])
{
op = (Operator)i;
}
}
if (op == default(Operator))
{
return(false);
}
}
if (op == default(Operator))
{
temp = temp.Substring(1).TrimStart();
}
else
{
temp = temp.Substring(2).TrimStart();
}
TokenBase valToken;
if (!EquationTokenizer.TryEvaluateExpression(temp, out valToken))
{
return(false);
}
text = "";
token = new AssignmentToken()
{
Value = valToken, Operator = op
};
return(true);
}
internal override bool TryGetToken(ref string text, out TokenBase token)
{
token = null;
string temp = text;
if (temp.Length == 0 || (!Char.IsLetter(temp[0]) && temp[0] != '_'))
{
return(false);
}
int count = 1;
while (count < temp.Length && (Char.IsLetterOrDigit(temp[count]) || temp[count] == '_'))
{
++count;
}
string name = temp.Substring(0, count);
MemberInfo info = null;
if (type != null)
{
info = type.GetMember(name).FirstOrDefault();
if (info == null)
{
return(false);
}
}
else
{
string nameTemp = "$" + name;
TokenBase tokenTemp;
if (!new ParameterToken().TryGetToken(ref nameTemp, out tokenTemp))
{
return(false);
}
}
temp = temp.Substring(count).TrimStart();
if (temp.Length == 0 || temp[0] != '=')
{
return(false);
}
temp = temp.Substring(1).TrimStart();
TokenBase valToken;
if (!EquationTokenizer.TryEvaluateExpression(temp, out valToken))
{
return(false);
}
text = "";
token = new AssignmentToken(null)
{
Name = name, Member = info, Value = valToken
};
return(true);
}
