internal override bool TryGetToken(ref string text, out TokenBase token, bool requireReturnValue = true)
{
token = null;
bool inQuotes = false;
int brackets = 0;
int i = 0;
while (true)
{
if (i >= text.Length)
{
return(false);
}
if (i > 0 && text[i] == '\'' && text[i - 1] != '\\')
{
inQuotes = !inQuotes;
}
else if (!inQuotes)
{
if (text[i] == '(')
{
++brackets;
}
else if (text[i] == ')')
{
--brackets;
if (brackets == 0)
{
break;
}
}
}
++i;
}
string temp = text.Substring(1, i - 1);
var tuple = GetNameMatches(temp, null, null).Where(tup => tup.Item1 is Type).Reverse().FirstOrDefault();
if (tuple == null)
{
return(false);
}
temp = text.Substring(i + 1).TrimStart();
TokenBase valToken = null;
if (parseTarget && !EquationTokenizer.TryGetValueToken(ref temp, out valToken))
{
return(false);
}
text = temp;
token = new TypeCastToken()
{
TargetType = tuple.Item1 as Type, Target = valToken
};
return(true);
}
internal override bool TryGetToken(ref string text, out TokenBase token, bool requireReturnValue = true)
{
token = null;
if (text.Length == 0)
{
return(false);
}
Operator op;
if (text[0] == '!')
{
op = Operator.Not;
}
else if (text[0] == '+')
{
op = Operator.Positive;
}
else if (text[0] == '-')
{
op = Operator.Negative;
}
else
{
return(false);
}
TokenBase valToken;
string temp = text.Substring(1).TrimStart();
if (!EquationTokenizer.TryGetValueToken(ref temp, out valToken))
{
return(false);
}
token = new UnaryOperatorToken()
{
operation = op, value = valToken
};
text = temp;
return(true);
}
internal override bool TryGetToken(ref string text, out TokenBase token)
{
token = null;
if (!text.StartsWith("throw"))
{
return(false);
}
string temp = text.Substring(5).TrimStart();
TokenBase valToken = null;
if (!EquationTokenizer.TryGetValueToken(ref temp, out valToken))
{
return(false);
}
text = temp;
token = new ThrowToken()
{
Exception = valToken
};
return(true);
}
