/// <summary>
/// Matches an option name (or names depending on the option styles enabled) preceeded by the '+' sign.
/// </summary>
/// <returns>An <see cref="OptionNameToken"/> representing the name (and style) of the first option
/// in the sequence read.</returns>
/// <remarks>This method calls <see cref="MatchGroupedOptionNames"/> if the <see cref="OptionStyles.Group"/>
/// style is enabled, otherwise <see cref="MatchLongOptionName"/>.</remarks>
private Token MatchPlusOption()
{
Debug.Assert(LA(1) == '+');
SkipCharacters(1);
mCurrentOptionStyle = OptionStyles.Plus;
if (OptionStyleManager.IsAllEnabled(EnabledOptionStyles, OptionStyles.Group))
{
return(MatchGroupedOptionNames());
}
else
{
return(MatchLongOptionName());
}
}
/// <summary>
/// Gets the next token from the input.
/// </summary>
/// <returns>the next token from the input or a null reference if no more tokens are available.</returns>
public Token GetNextToken()
{
if (!mTokenQueue.IsEmpty)
{
return(mTokenQueue.Dequeue());
}
// Cache LA(1), it will be used a lot
int la1;
// Skip any whitespace
while ((la1 = LA(1)) != -1 && IsWhiteSpace(la1))
{
ReadCharacter();
}
if (la1 == -1) // No more tokens (or characters) to read
{
return(null);
}
if (la1 == '-' && OptionStyleManager.IsAnyEnabled(EnabledOptionStyles, OptionStyles.Unix))
{
if (LA(2) == '-')
{
if (IsWhiteSpace(LA(3)))
{
return(MatchEndOption());
}
else if (OptionStyleManager.IsAllEnabled(EnabledOptionStyles, OptionStyles.LongUnix))
{
return(MatchLongUnixOption());
}
}
if (OptionStyleManager.IsAllEnabled(EnabledOptionStyles, OptionStyles.ShortUnix))
{
return(MatchShortUnixOption());
}
}
if (la1 == '/' && OptionStyleManager.IsAllEnabled(EnabledOptionStyles, OptionStyles.Windows))
{
return(MatchWindowsOption());
}
if (la1 == '+' && OptionStyleManager.IsAllEnabled(EnabledOptionStyles, OptionStyles.Plus))
{
return(MatchPlusOption());
}
if (la1 == '@' && OptionStyleManager.IsAllEnabled(EnabledOptionStyles, OptionStyles.File))
{
return(MatchFileOption());
}
if (IsAssignmentCharacter(la1))
{
return(MatchAssignmentCharacter());
}
return(MatchValue());
}