public void buildingWorks(string regex, string expected)
{
StringCursor stringCursor = new StringCursor(regex);
NodeAST node = Regex.MatchRegex(stringCursor);
Assert.That(node.ToString(), Is.EqualTo(expected));
}
public bool TryCreateFragment(StringCursor text, out Fragment fragment)
{
ITextSplitter textSplitter = new SeparatorTextSplitter(text, new[] {'\r', '\n'});
fragment = new DelimitedFragment(textSplitter, _fragmentFactory);
return true;
}
public void RegexMatchWorks(string regex, bool expected)
{
StringCursor stringCursor = new StringCursor(regex);
NodeAST node = Regex.MatchRegex(stringCursor);
Assert.That(node.Type != NodeASTType.Error, Is.EqualTo(expected));
}
public bool TryCreateFragment(StringCursor text, out Fragment fragment)
{
if (text.Count == 0)
{
fragment = default(Fragment);
return false;
}
return _fragmentFactory.TryCreateFragment(text, out fragment);
}
/// <summary>
/// Execute the parser on the text
/// </summary>
/// <param name="parser"></param>
/// <param name="text"></param>
/// <typeparam name="TResult"></typeparam>
/// <returns></returns>
public static Result <Cursor <char>, TResult> Execute <TResult>(this Parser <char, TResult> parser, string text)
{
var cursor = new StringCursor(text);
return(parser.Parse(cursor));
}
public DelimiterTextSplitter(StringCursor text, char delimiter)
{
if (text == null)
throw new ArgumentNullException("text");
_delimiter = delimiter;
_text = text.Data;
_parseOffset = text.Offset;
_parseEnd = text.Offset + text.Count;
_elements = new List<StringCursor>();
}
public bool TryGetText(int index, out StringCursor text)
{
if (index < 0)
throw new ArgumentOutOfRangeException("index", "Index must be >= 0");
if (index < _elements.Count)
{
text = _elements[index];
return true;
}
while ((_parseEnd - _parseOffset) > 0 && index >= _elements.Count)
{
int lineEnd = _text.IndexOf(_delimiter, _parseOffset, _parseEnd - _parseOffset);
if (lineEnd < 0)
lineEnd = _parseEnd;
_elements.Add(new LocationStringCursor(_text, _parseOffset, lineEnd - _parseOffset, _elements.Count));
if (lineEnd == _parseEnd)
{
_parseOffset = lineEnd;
break;
}
_parseOffset = lineEnd + 1;
if (_parseEnd == _parseOffset)
{
_elements.Add(new LocationStringCursor(_text, _parseOffset, 0, _elements.Count));
}
}
if (index < _elements.Count)
{
text = _elements[index];
return true;
}
text = default(StringCursor);
return false;
}
public bool TryCreateFragment(StringCursor text, out Fragment fragment)
{
fragment = new ParsedFragment(text);
return true;
}
public ParsedFragment(StringCursor text)
{
_text = text;
}
public bool TryGetText(int index, out StringCursor text)
{
if (index < 0)
throw new ArgumentOutOfRangeException("index", "Index must be >= 0");
if (index < _elements.Count)
{
text = _elements[index];
return true;
}
while ((_parseEnd - _parseOffset) > 0 && index >= _elements.Count)
{
int lineEnd = _text.IndexOfAny(_separator, _parseOffset);
if (lineEnd < 0)
lineEnd = _parseEnd;
_elements.Add(new LocationStringCursor(_text, _parseOffset, lineEnd - _parseOffset, _elements.Count));
if (lineEnd == _parseEnd)
{
_parseOffset = lineEnd;
break;
}
for (int i = 0; i < _separator.Length && lineEnd < _parseEnd; i++, lineEnd++)
{
if (_text[lineEnd] != _separator[i])
break;
}
_parseOffset = lineEnd;
if (_parseEnd == _parseOffset)
{
_elements.Add(new LocationStringCursor(_text, _parseOffset, 0, _elements.Count));
}
}
if (index < _elements.Count)
{
text = _elements[index];
return true;
}
text = default(StringCursor);
return false;
}
public SeparatorTextSplitter(StringCursor text, char[] separator = null)
{
if (text == null)
throw new ArgumentNullException("text");
_separator = separator ?? new[] {'\r', '\n'};
_text = text.Data;
_parseOffset = text.Offset;
_parseEnd = text.Offset + text.Count;
_elements = new List<StringCursor>();
}
