#include <regex>

		for (INIContentHandler* handler : handlers) handler->startDocument();

		std::regex whitespacePattrern("\\s*");

		std::regex commentPattrern("\\s*(;|#)\\s*(.*)");

		std::regex sectionPattrern("\\s*\\[\\s*([^\\]]+)\\s*\\]\\s*");

		std::regex entryQuotesPattrern("\\s*([^=\\]]+?[^=\\s\\]]*)(\\[([^\\]]+)\\])?\\s*=\\s*\"([^']+)\"\\s*((;|#)\\s*(.*))?");

		std::regex entryApostrophesPattrern("\\s*([^=\\]]+?[^=\\s\\]]*)(\\[([^\\]]+)\\])?\\s*=\\s*'([^']+)'\\s*((;|#)\\s*(.*))?");

		std::regex entryPlainPattrern("\\s*([^=\\]]+?[^=\\s\\]]*)(\\[([^\\]]+)\\])?\\s*=\\s*(.*)");

		std::smatch match;

		std::string section;

		std::string line;

		while (std::getline(input, line)) {

			if (std::regex_match(line, match, whitespacePattrern)) {

				// TODO: support also whitespace

			} else if (std::regex_match(line, match, commentPattrern)) {

				// TODO: support also comments + emit also the comment style (;/#)

			} else if (std::regex_match(line, match, sectionPattrern)) {

				if (section.size()) for (INIContentHandler* handler : handlers) handler->endSection();

				section = match[1];

				for (INIContentHandler* handler : handlers) handler->startSection(section);

			} else if (std::regex_match(line, match, entryQuotesPattrern) || std::regex_match(line, match, entryApostrophesPattrern)) {

				// TODO: support also comments + emit also the comment style (;/#)

				// TODO: emit also the quote style ('/"/) and surrounding whitespace

				for (INIContentHandler* handler : handlers) handler->entry(match[1], match[3], match[4]);

			} else if (std::regex_match(line, match, entryPlainPattrern)) {

				for (INIContentHandler* handler : handlers) handler->entry(match[1], match[3], match[4]);

			} else {

				// TODO: warning, error, or support unknown content

			}

			// TODO: probably switch to state-machine approach instead of regular expressions

			// TODO: warning/error handler

			// TODO: support also multiline content (\ + \n)

			// TODO: support also quoted or multiline keys?

			// TODO: support also escaped characters

			// TODO: support also Java .properties and manifest.mf formats?

			// TODO: support also nested sections – hierarchy

			// TODO: support also option for alternative key-value separator (: instead of =)

			// TODO: support also other encodings (currently only UTF-8 is supported)

			// TODO: emit line numbers and/or event order?

		if (section.size()) for (INIContentHandler* handler : handlers) handler->endSection();

		for (INIContentHandler* handler : handlers) handler->endDocument();