/// <summary>
/// Determines whether the specified character is an assignment character for the <see cref="OptionStyles"/>
/// currently being parsed.
/// </summary>
/// <param name="ch">The character to check.</param>
/// <returns>
/// <c>true</c> if the specified character is an assignment character for the <see cref="OptionStyles"/>
/// currently being parsed; otherwise, <c>false</c>.
/// </returns>
private bool IsAssignmentCharacter(int ch)
{
OptionStyles optionStyle;
return(mAssignmentCharacters.Find((char)ch, out optionStyle) && OptionStyleManager.IsAnyEnabled(optionStyle, EnabledOptionStyles) &&
OptionStyleManager.IsAnyEnabled(optionStyle, mCurrentOptionStyle));
}
/// <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());
}