Beispiel #1
0
        /// <summary>
        /// Tries to parse all specified items except some others.
        /// </summary>
        public bool ParseExcept(LexicalState state, LexicalItem main, LexicalItem exception)
        {
            int index = state.Position;

            if (!main.Parse(state))
            {
                return(false);
            }

            string parsed = state.Get(main.Key, index);

            LexicalState check = new LexicalState(parsed);

            if (exception.Parse(check))
            {
                if (check.IsEndOfData)
                {
                    state.Reset(index);
                    return(false);
                }
            }

            state.AddBack(Key, index);
            return(true);
        }
Beispiel #2
0
        /// <summary>
        /// Tries to parse a batch of similar lexical items with specified delimiter.
        /// </summary>
        public bool ParseMany(LexicalState state, LexicalItem part, LexicalItem delimiter)
        {
            int index = state.Position;

            if (!part.Parse(state))
            {
                return(false);
            }

            while (true)
            {
                int lastIndex = state.Position;

                if (delimiter != null)
                {
                    if (!delimiter.Parse(state))
                    {
                        break;
                    }
                }

                if (!part.Parse(state))
                {
                    state.Reset(lastIndex);
                    break;
                }
            }

            state.AddBack(Key, index);
            return(true);
        }
Beispiel #3
0
        /// <summary>
        /// Performs tests for letter lexem.
        /// </summary>
        private void CheckLetter(LexicalItem item, string letter, bool canEscape)
        {
            string lower = letter.ToLowerInvariant();
            string upper = letter.ToUpperInvariant();
            string lowerHex = ((int)lower[0]).ToString("x");
            string upperHex = ((int)upper[0]).ToString("x");
            string lowerHex1 = lowerHex.Substring(0, 1);
            string lowerHex2 = lowerHex.Substring(1, 1);
            string upperHex1 = upperHex.Substring(0, 1);
            string upperHex2 = upperHex.Substring(1, 1);

            string[] hexVariants = new[]
                {
                    lowerHex1.ToLower() + lowerHex2.ToLower(),
                    lowerHex1.ToLower() + lowerHex2.ToUpper(),
                    lowerHex1.ToUpper() + lowerHex2.ToLower(),
                    lowerHex1.ToUpper() + lowerHex2.ToUpper(),
                    upperHex1.ToLower() + upperHex2.ToLower(),
                    upperHex1.ToLower() + upperHex2.ToUpper(),
                    upperHex1.ToUpper() + upperHex2.ToLower(),
                    upperHex1.ToUpper() + upperHex2.ToUpper(),
                };

            Check(true, item, lower);
            Check(true, item, upper);
            Check(false, item, lower + " ");
            Check(false, item, " " + lower);

            Check(canEscape, item, "\\" + lower);
            Check(canEscape, item, "\\" + upper);
            Check(false, item, "\\\\" + lower);
            Check(false, item, lower + "\\");

            foreach (string hexVariant in hexVariants)
            {
                Check(true, item, "\\" + hexVariant);
                Check(true, item, "\\0" + hexVariant);
                Check(true, item, "\\00" + hexVariant);
                Check(true, item, "\\000" + hexVariant);
                Check(true, item, "\\0000" + hexVariant);
                Check(false, item, "\\00000" + hexVariant);
                Check(true, item, "\\" + hexVariant + " ");
                Check(false, item, "\\" + hexVariant + "  ");
                Check(true, item, "\\0" + hexVariant + "\r\n");
                Check(false, item, "\\0" + hexVariant + "\n\r");
                Check(true, item, "\\00" + hexVariant + "\r");
                Check(true, item, "\\00" + hexVariant + "\n");
                Check(true, item, "\\00" + hexVariant + "\t");
                Check(true, item, "\\00" + hexVariant + "\f");
            }
        }
Beispiel #4
0
        /// <summary>
        /// Checks whether specified data string can be fully parsed to the lexical item.
        /// </summary>
        public void Check(bool expected, LexicalItem item, string data)
        {
            bool result = Parse(item, data);

            if (expected != result)
            {
                throw new AssertFailedException(
                    String.Format(
                        "Checking for [{0}] failed. Expected:<{1}>. Actual:<{2}>.",
                        data.ToDisplay(),
                        expected,
                        !expected));
            }
        }
Beispiel #5
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 /// <summary>
 /// Tries to parses specified data string into lexical item.
 /// </summary>
 protected override bool Parse(LexicalItem item, string data)
 {
     LexicalState state = new LexicalState(data);
     return item.ParseFull(state);
 }
Beispiel #6
0
        /// <summary>
        /// Tries to parse all specified items except some others.
        /// </summary>
        public bool ParseExcept(LexicalState state, LexicalItem main, LexicalItem exception)
        {
            int index = state.Position;

            if (!main.Parse(state))
                return false;

            string parsed = state.Get(main.Key, index);

            LexicalState check = new LexicalState(parsed);
            if (exception.Parse(check))
            {
                if (check.IsEndOfData)
                {
                    state.Reset(index);
                    return false;
                }
            }

            state.AddBack(Key, index);
            return true;
        }
Beispiel #7
0
        /// <summary>
        /// Tries to parse a batch of similar lexical items with specified delimiter.
        /// </summary>
        public bool ParseMany(LexicalState state, LexicalItem part, LexicalItem delimiter)
        {
            int index = state.Position;

            if (!part.Parse(state))
                return false;

            while (true)
            {
                int lastIndex = state.Position;

                if (delimiter != null)
                {
                    if (!delimiter.Parse(state))
                        break;
                }

                if (!part.Parse(state))
                {
                    state.Reset(lastIndex);
                    break;
                }
            }

            state.AddBack(Key, index);
            return true;
        }
 protected SpecificIdentifier(params LexicalItem[] items)
 {
     m_check = new ParseAll(items);
 }
Beispiel #9
0
 /// <summary>
 /// Initializes a new instance.
 /// </summary>
 public LexicalTerminal(LexicalItem item)
 {
     m_item = item;
 }
Beispiel #10
0
 /// <summary>
 /// Tries to parses specified data string into lexical item.
 /// </summary>
 protected abstract bool Parse(LexicalItem item, string data);
Beispiel #11
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 protected SpecificAtKeyword(params LexicalItem[] items)
 {
     m_check = new ParseAll(items);
 }