Esempio n. 1
0
        protected override bool ReadBody(ISourceStream source, CompoundTokenDetails details)
        {
            int      start        = source.PreviewPosition;
            bool     allowEscapes = details.IsSet((short)IdOptions.AllowsEscapes);
            CharList outputChars  = new CharList();

            while (!source.EOF())
            {
                char current = source.PreviewChar;
                if (Grammar.IsWhitespaceOrDelimiter(current))
                {
                    break;
                }
                if (allowEscapes && current == this.EscapeChar)
                {
                    current = ReadUnicodeEscape(source, details);
                    //We  need to back off the position. ReadUnicodeEscape sets the position to symbol right after escape digits.
                    //This is the char that we should process in next iteration, so we must backup one char, to pretend the escaped
                    // char is at position of last digit of escape sequence.
                    source.PreviewPosition--;
                    if (details.Error != null)
                    {
                        return(false);
                    }
                }
                //Check if current character is OK
                if (!CharOk(current, source.PreviewPosition == start))
                {
                    break;
                }
                //Check if we need to skip this char
#if NETSTANDARD
                UnicodeCategory currCat = CharUnicodeInfo.GetUnicodeCategory(current);
#else
                UnicodeCategory currCat = char.GetUnicodeCategory(current); //I know, it suxx, we do it twice, fix it later
#endif
                if (!this.CharsToRemoveCategories.Contains(currCat))
                {
                    outputChars.Add(current); //add it to output (identifier)
                }
                source.PreviewPosition++;
            }//while
            if (outputChars.Count == 0)
            {
                return(false);
            }
            //Convert collected chars to string
            details.Body = new string(outputChars.ToArray());
            if (!CheckCaseRestriction(details.Body))
            {
                return(false);
            }
            return(!string.IsNullOrEmpty(details.Body));
        }
Esempio n. 2
0
        protected override bool ReadBody(ISourceStream source, ScanDetails details)
        {
            int      start        = source.Position;
            bool     allowEscapes = !details.IsSet(ScanFlags.DisableEscapes);
            CharList outputChars  = new CharList();

            while (!source.EOF())
            {
                char current = source.CurrentChar;
                if (_terminators.IndexOf(current) >= 0)
                {
                    break;
                }
                if (allowEscapes && current == this.EscapeChar)
                {
                    current = ReadUnicodeEscape(source, details);
                    //We  need to back off the position. ReadUnicodeEscape sets the position to symbol right after escape digits.
                    //This is the char that we should process in next iteration, so we must backup one char, to pretend the escaped
                    // char is at position of last digit of escape sequence.
                    source.Position--;
                    if (details.HasError())
                    {
                        return(false);
                    }
                }
                //Check if current character is OK
                if (!CharOk(current, source.Position == start))
                {
                    break;
                }
                //Check if we need to skip this char
                UnicodeCategory currCat = char.GetUnicodeCategory(current); //I know, it suxx, we do it twice, fix it later
                if (!this.CharsToRemoveCategories.Contains(currCat))
                {
                    outputChars.Add(current); //add it to output (identifier)
                }
                source.Position++;
            }//while
            if (outputChars.Count == 0)
            {
                return(false);
            }
            //Convert collected chars to string
            details.Body = new string(outputChars.ToArray());
            return(!string.IsNullOrEmpty(details.Body));
        }