public void TestRanges() { SeekableStringReader s = new SeekableStringReader("hello"); Assert.Throws <ParseException>(() => s.Read(-1)); Assert.AreEqual("hello", s.Read(999)); Assert.Throws <ParseException>(() => s.Read(1)); s.Rewind(int.MaxValue); Assert.IsTrue(s.HasMore()); Assert.AreEqual("hello", s.Peek(999)); Assert.IsTrue(s.HasMore()); }
public void TestStuff() { using (SeekableStringReader s = new SeekableStringReader("hello")) { Assert.AreEqual('h', s.Peek()); Assert.AreEqual("hel", s.Peek(3)); Assert.AreEqual('h', s.Read()); Assert.AreEqual("ell", s.Read(3)); Assert.AreEqual("o", s.Peek(999)); Assert.AreEqual("o", s.Read(999)); } using (SeekableStringReader s2 = new SeekableStringReader(" skip.\t\n\rwhitespace. ")) { s2.SkipWhitespace(); Assert.AreEqual("skip", s2.ReadUntil('.')); s2.SkipWhitespace(); Assert.AreEqual("whitespace", s2.ReadUntil('.')); s2.SkipWhitespace(); Assert.IsFalse(s2.HasMore()); Assert.Throws <IndexOutOfRangeException>(() => s2.Peek()); } }
public void TestReadUntil() { SeekableStringReader s = new SeekableStringReader("hello there"); s.Read(); Assert.AreEqual("ello", s.ReadUntil(' ')); Assert.AreEqual('t', s.Peek()); Assert.Throws <ParseException>(() => s.ReadUntil('x')); Assert.AreEqual("there", s.Rest()); Assert.Throws <ParseException>(() => s.Rest()); s.Rewind(int.MaxValue); Assert.AreEqual("hell", s.ReadUntil('x', 'y', 'z', ' ', 'o')); Assert.Throws <ParseException>(() => s.ReadUntil('x', 'y', '@')); }
/// <summary> /// /// </summary> /// <param name="rest"></param> /// <param name="format"></param> /// <returns></returns> /// <exception cref="">InvalidSystemException</exception> public static string Parse(string rest, OutputFormat format) { SeekableReader reader = new SeekableStringReader(rest); bool success = System.Parse(reader, out System system); if (!success) { throw new InvalidSystemException("Could not parse as a system"); } if (reader.Peek() != -1) { throw new InvalidSystemException($"Saw unexpected character: {(char)reader.Read()}"); } return(system.ToString(format)); }
private VariableNode?ReadVariableNode(SeekableStringReader reader) { int start = reader.NextPosition; int c, len = 0; while ((c = reader.Peek()) > -1 && IsValidVariableChar(c, isFirstChar: len == 0)) { reader.Read(); len++; } if (len == 0) { errorsSink.AddError( "There is a variable with an empty or invalid name. The valid characters are 'a-zA-Z0-9_' and the first character cannot be a number.", start); return(null); } return(new VariableNode(pattern.Substring(start, len))); }