/// <summary>
/// Get the value represented by a string containing an SDL literal.
/// </summary>
/// <param name="literal">An SDL literal</param>
/// <returns>A value for an SDL literal</returns>
/// <exception cref="FormatException">(or subclass SDLParseException) If
/// the string cannot be interpreted as an SDL literal</exception>
/// <exception cref="ArgumentNullException">If <c>literal</c> is null.
/// </exception>
public static Object Value(String literal)
{
if (literal == null)
{
throw new ArgumentNullException("literal argument to " +
"SDL.Value(string) cannot be null");
}
if (literal.StartsWith("\"") || literal.StartsWith("`"))
{
return(Parser.ParseString(literal));
}
if (literal.StartsWith("'"))
{
return(Parser.ParseCharacter(literal));
}
if (literal.Equals("null"))
{
return(null);
}
if (literal.Equals("true") || literal.Equals("on"))
{
return(true);
}
if (literal.Equals("false") || literal.Equals("off"))
{
return(false);
}
if (literal.StartsWith("["))
{
return(Parser.ParseBinary(literal));
}
if (literal[0] != '/' && literal.IndexOf('/') != -1)
{
return(Parser.ParseDateTime(literal));
}
if (literal[0] != ':' && literal.IndexOf(':') != -1)
{
return(Parser.ParseTimeSpan(literal));
}
if ("01234567890-.".IndexOf(literal[0]) != -1)
{
return(Parser.ParseNumber(literal));
}
throw new FormatException("String " + literal + " does not " +
"represent an SDL type.");
}
internal Token(Parser parser, string text, int line, int position)
{
this.parser = parser;
this.text = text;
this.line = line;
this.position = position;
this.size = text.Length;
this.obj = (object)null;
try
{
char ch = text[0];
switch (ch)
{
case '"':
case '`':
this.type = Type.STRING;
this.obj = (object)Parser.ParseString(text);
break;
case '\'':
this.type = Type.CHARACTER;
this.obj = (object)text[1];
break;
default:
if (text == "null")
{
this.type = Type.NULL;
break;
}
else if (text == "true" || text == "on")
{
this.type = Type.BOOLEAN;
this.obj = (object)true;
break;
}
else if (text == "false" || text == "off")
{
this.type = Type.BOOLEAN;
this.obj = (object)false;
break;
}
else if ((int)ch == 91)
{
this.type = Type.BINARY;
this.obj = (object)Parser.ParseBinary(text);
break;
}
else if ((int)ch != 47 && text.IndexOf('/') != -1 && text.IndexOf(':') == -1)
{
this.type = Type.DATE;
this.obj = (object)Parser.ParseDateTime(text);
break;
}
else if ((int)ch != 58 && text.IndexOf(':') != -1)
{
this.type = Type.TIME;
this.obj = (object)Token.ParseTimeSpanWithZone(text, parser, line, position);
break;
}
else if ("01234567890-.".IndexOf(ch) != -1)
{
this.type = Type.NUMBER;
this.obj = Parser.ParseNumber(text);
break;
}
else
{
this.type = (int)ch != 123 ? ((int)ch != 125 ? ((int)ch != 61 ? ((int)ch != 58 ? Type.IDENTIFIER : Type.COLON) : Type.EQUALS) : Type.END_BLOCK) : Type.START_BLOCK;
break;
}
}
}
catch (FormatException ex)
{
throw new SDLParseException(ex.Message, line, position);
}
this.punctuation = this.type == Type.COLON || this.type == Type.EQUALS || this.type == Type.START_BLOCK || this.type == Type.END_BLOCK;
this.literal = this.type != Type.IDENTIFIER && !this.punctuation;
}