protected internal bool Required(TSymbolType expected, bool errorIfNotFound, Func <string, string> errorBase)
{
var found = At(expected);
if (!found && errorIfNotFound)
{
string error;
if (Language.IsNewLine(CurrentSymbol))
{
error = LegacyResources.ErrorComponent_Newline;
}
else if (Language.IsWhiteSpace(CurrentSymbol))
{
error = LegacyResources.ErrorComponent_Whitespace;
}
else if (EndOfFile)
{
error = LegacyResources.ErrorComponent_EndOfFile;
}
else
{
error = LegacyResources.FormatErrorComponent_Character(CurrentSymbol.Content);
}
int errorLength;
if (CurrentSymbol == null || CurrentSymbol.Content == null)
{
errorLength = 1;
}
else
{
errorLength = Math.Max(CurrentSymbol.Content.Length, 1);
}
Context.ErrorSink.OnError(CurrentStart, errorBase(error), errorLength);
}
return(found);
}
