static void Advance(SourcePosn sourcePosn, int position)
{
var wasEnd = sourcePosn.IsEnd;
sourcePosn.Position += position;
if(wasEnd)
sourcePosn.IsValid = false;
}
int? IMatch.Match(SourcePosn sourcePosn)
{
var positionFactory = _error as IPositionExceptionFactory;
if(positionFactory != null)
throw positionFactory.Create(sourcePosn);
throw new Match.Exception(sourcePosn, _error);
}
int? IMatch.Match(SourcePosn sourcePosn)
{
var length = sourcePosn.Match(Target);
if (length != null)
OnMatch(sourcePosn.SubString(0, length.Value));
else
OnMismatch?.Invoke();
return length;
}
int? IMatch.Match(SourcePosn sourcePosn)
{
var result = _data.Match(sourcePosn);
if(result == null)
return null;
var otherResult = _other.Match(sourcePosn + result.Value);
if(otherResult == null)
return null;
return result.Value + otherResult.Value;
}
public int? GuardedMatch(SourcePosn sourcePosn, IMatch match)
{
try
{
return sourcePosn.Match(match);
}
catch(Match.Exception exception)
{
throw new TwoLayerScanner.Exception
(
exception.SourcePosn,
Convert(exception.Error)
);
}
}
int? IMatch.Match(SourcePosn sourcePosn)
{
var current = sourcePosn.Clone;
while(true)
{
var result = _data.Match(current);
if(result != null)
return current - sourcePosn + result;
if(current.IsEnd)
return null;
current.Position += 1;
}
}
int? IMatch.Match(SourcePosn sourcePosn)
{
var length = _data.Match(sourcePosn);
if(length == null)
return null;
var value = sourcePosn.SubString(0, length.Value);
var funcResult = _func(value).Match(sourcePosn + length.Value);
return funcResult == null ? null : length.Value + funcResult;
}
int? IMatch.Match(SourcePosn sourcePosn)
{
var count = 0;
var current = sourcePosn;
while(true)
{
var result = current - sourcePosn;
if(count == _maxCount)
return result;
var length = _data.Match(current);
if(length == null)
return count < _minCount ? null : (int?) result;
if(current.IsEnd)
return null;
current += length.Value;
count++;
}
}
int? IMatch.Match(SourcePosn sourcePosn)
=> _func(sourcePosn.Current) != _isTrue ? null : (int?) 1;
int? IMatch.Match(SourcePosn sourcePosn)
{
var result = _data.Match(sourcePosn);
return result == null ? 1 : (int?) null;
}
int? IMatch.Match(SourcePosn sourcePosn)
{
var result = _data.Length;
return sourcePosn.StartsWith(_data) ? (int?) result : null;
}
int? WhiteSpace(SourcePosn sourcePosn) => GuardedMatch(sourcePosn, _whiteSpace);
public Exception(SourcePosn sourcePosn, IError error)
{
SourcePosn = sourcePosn;
Error = error;
}
internal int? Any(SourcePosn sourcePosn) => GuardedMatch(sourcePosn, _any);
internal int? Text(SourcePosn sourcePosn) => GuardedMatch(sourcePosn, _text);
internal int? Number(SourcePosn sourcePosn) => GuardedMatch(sourcePosn, _number);
int? IMatch.Match(SourcePosn sourcePosn)
=> _data.Match(sourcePosn) ?? _other.Match(sourcePosn);
int? IMatch.Match(SourcePosn sourcePosn)
=> _data.Contains(sourcePosn.Current) ? (int?) 1 : null;
int? IMatch.Match(SourcePosn sourcePosn) => sourcePosn.IsEnd ? 0 : (int?) null;
int? LineEnd(SourcePosn sourcePosn) => GuardedMatch(sourcePosn, _lineEnd);
public int? Match(SourcePosn sourcePosn)
{
Tracer.TraceBreak();
return 0;
}
public Exception(SourcePosn sourcePosn, IScannerTokenType syntaxError)
{
SourcePosn = sourcePosn;
SyntaxError = syntaxError;
}
int? IMatch.Match(SourcePosn sourcePosn) => _data.Match(sourcePosn);
internal Worker(TwoLayerScanner parent, SourcePosn sourcePosn)
{
Tracer.Assert(sourcePosn.IsValid);
Parent = parent;
SourcePosn = sourcePosn;
}
int? Comment(SourcePosn sourcePosn) => GuardedMatch(sourcePosn, _comment);
internal int? Number(SourcePosn sourcePosn) => sourcePosn.Match(_number);
IItem[] IScanner.GetNextTokenGroup(SourcePosn sourcePosn)
=> new Worker(this, sourcePosn).GetNextTokenGroup().ToArray();
internal int? WhiteSpace(SourcePosn sourcePosn) => sourcePosn.Match(_whiteSpaces);
int? LineComment(SourcePosn sourcePosn) => GuardedMatch(sourcePosn, _lineComment);
internal int? Any(SourcePosn sourcePosn) => sourcePosn.Match(_any);
