/// <summary>
/// Accepts the source context (by <see cref="IParsingContextStream.Accept"/>) and returns accepted fragment (<see cref="IParsingContextStream.GetAcceptedFragmentOrEmpty"/>).
/// <seealso cref="IParsingContextStream.Accept"/>
/// <seealso cref="IParsingContextStream.GetAcceptedFragmentOrEmpty"/>
/// <seealso cref="GetAcceptedFragment"/>
/// <seealso cref="TryGetAcceptedFragment"/>
/// </summary>
/// <param name="source">The source.</param>
/// <returns>The accepted fragment.</returns>
public static ISourceCodeFragment AcceptAndGetFragment(this IParsingContextStream source)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
source.Accept();
return(source.GetAcceptedFragmentOrEmpty());
}
public static ISourceCodeFragment GetAcceptedFragment(this IParsingContextStream source)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (source.AcceptedPosition < 0)
{
throw new ArgumentException("Unable to get accepted fragment: the parsing context is not accepted.", nameof(source));
}
return(source.GetAcceptedFragmentOrEmpty());
}
public static bool TryGetAcceptedFragment(this IParsingContextStream source, out ISourceCodeFragment acceptedFragment)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (source.AcceptedPosition < 0)
{
acceptedFragment = null;
return(false);
}
acceptedFragment = source.GetAcceptedFragmentOrEmpty();
return(true);
}