internal static MathExpression FromTokens(StringToken[] tokens)
{
var reader = new StringTokenReader <StringToken>(tokens);
///TODO: Read math formula here
return(null);
}
void IStringTokenReaderHelper.ReportError(
string str,
int offset,
Token token,
string errorId)
{
StringTokenReader.ReportError(this._parser, str, offset, errorId);
}
void IStringTokenReaderHelper.ReportMissingTerminator(
string str,
int startOffset,
int errorOffset,
string errorId,
Token token,
string terminator)
{
StringTokenReader.ReportMissingTerminator(this._parser, str, startOffset, errorOffset, errorId, terminator);
}
public static TokenReader BuildChainOfResponsibility()
{
CommentReader commentReader = new CommentReader();
WhiteSpaceReader whiteSpaceReader = new WhiteSpaceReader();
EqualityTokenReader equalityTokenReader = new EqualityTokenReader();
SingleCharacterTokenReader singleCharacterTokenReader = new SingleCharacterTokenReader(Reserved.Characters);
StringTokenReader stringTokenReader = new StringTokenReader();
IdentifierTokenReader identifierTokenReader = new IdentifierTokenReader();
NumberTokenReader numberTokenReader = new NumberTokenReader();
commentReader.SetSuccessor(whiteSpaceReader);
whiteSpaceReader.SetSuccessor(equalityTokenReader);
equalityTokenReader.SetSuccessor(singleCharacterTokenReader);
singleCharacterTokenReader.SetSuccessor(stringTokenReader);
stringTokenReader.SetSuccessor(identifierTokenReader);
identifierTokenReader.SetSuccessor(numberTokenReader);
return(commentReader);
}
internal override Token GetToken(string input, ref int offset)
{
if (offset >= input.Length)
{
return((Token)null);
}
char ch = input[offset];
switch (ch)
{
case '$':
case '@':
int offset1 = offset + 1;
if (offset1 >= input.Length)
{
return((Token)null);
}
if (ch == '@' && input[offset1] == '{' || input[offset1] == '(')
{
return((Token)null);
}
bool inBraces = false;
string text = StringTokenReader.MatchVariableName(input, ref offset1, (IStringTokenReaderHelper)this.Tokenizer, (Token)null, out inBraces);
if (string.IsNullOrEmpty(text))
{
if (inBraces)
{
this._tokenizer.Parser.ReportException((object)null, typeof(ParseException), this._tokenizer.PositionToken(offset), "EmptyVariableReference");
}
return((Token)null);
}
if (offset1 < input.Length && this.Tokenizer.IsEnabled(8) && ":.[{}();,|&\r\n\t ".IndexOf(input[offset1]) == -1)
{
return((Token)null);
}
offset = offset1;
return(new Token(text, ch == '@' ? TokenId.SplattedVariableToken : TokenId.VariableToken));
default:
return((Token)null);
}
}
