Method peekNextText

plugins/astyle/3rdparty/libastyle/ASFormatter.cpp:3837–3896

* get the next non-whitespace substring on following lines, bypassing all comments. * * @param firstLine the first line to check * @return the next non-whitespace substring. */

 * @return  the next non-whitespace substring.
 */
string ASFormatter::peekNextText(const string& firstLine,
                                 bool endOnEmptyLine /*false*/,
                                 shared_ptr<ASPeekStream> streamArg /*nullptr*/) const
{
	assert(sourceIterator->getPeekStart() == 0 || streamArg != nullptr);	// Borland may need != 0
	bool isFirstLine = true;
	string nextLine_ = firstLine;
	size_t firstChar = string::npos;
	shared_ptr<ASPeekStream> stream = streamArg;
	if (stream == nullptr)					// Borland may need == 0
		stream = make_shared<ASPeekStream>(sourceIterator);

	// find the first non-blank text, bypassing all comments.
	bool isInComment_ = false;
	while (stream->hasMoreLines() || isFirstLine)
	{
		if (isFirstLine)
			isFirstLine = false;
		else
			nextLine_ = stream->peekNextLine();

		firstChar = nextLine_.find_first_not_of(" \t");
		if (firstChar == string::npos)
		{
			if (endOnEmptyLine && !isInComment_)
				break;
			continue;
		}

		if (nextLine_.compare(firstChar, 2, "/*") == 0)
		{
			firstChar += 2;
			isInComment_ = true;
		}

		if (isInComment_)
		{
			firstChar = nextLine_.find("*/", firstChar);
			if (firstChar == string::npos)
				continue;
			firstChar += 2;
			isInComment_ = false;
			firstChar = nextLine_.find_first_not_of(" \t", firstChar);
			if (firstChar == string::npos)
				continue;
		}

		if (nextLine_.compare(firstChar, 2, "//") == 0)
			continue;

		// found the next text
		break;
	}

	if (firstChar == string::npos)
		nextLine_ = "";
	else
		nextLine_ = nextLine_.substr(firstChar);