Function THROWS

src/GCodes/GCodeBuffer/StringParser.cpp:355–445

// Check whether the current command is a meta command, or we are skipping commands in a block
// Return true if the current line no longer needs to be processed
bool StringParser::CheckMetaCommand(const StringRef& reply) THROWS(GCodeException)
{
	// Ignore comment lines, if they are not indented they mess up the control flow. They may still need to be processed so return false.
	if (gb.buffer[0] == ';')
	{
		return false;
	}

	if (overflowed)
	{
		throw GCodeException(&gb, ARRAY_SIZE(gb.buffer) + commandIndent - 1, "GCode command too long");
	}

	const bool doingFile = gb.IsDoingFile();
	BlockType skippedBlockType = BlockType::plain;
	if (doingFile)
	{
		// Deal with warning about mixed spaces and tabs
		if (commandIndent == 0)
		{
			seenLeadingSpace = seenLeadingTab = false;						// it's OK if the previous block used only space and the following one uses only tab, or v.v.
		}
		else
		{
			CheckForMixedSpacesAndTabs();
		}

		// Deal with skipping blocks
		if (indentToSkipTo != NoIndentSkip)
		{
			if (indentToSkipTo < commandIndent)
			{
				Init();
				return true;												// continue skipping this block
			}
			else
			{
				// Finished skipping the nested block
				if (indentToSkipTo == commandIndent)
				{
					skippedBlockType = gb.GetBlockState().GetType();		// save the type of the block we skipped in case the command is 'else' or 'elif'
					gb.GetBlockState().SetPlainBlock();						// we've ended the loop or if-block
				}
				indentToSkipTo = NoIndentSkip;								// no longer skipping
			}
		}

		while (commandIndent < gb.GetBlockIndent())
		{
			gb.CurrentFileMachineState().EndBlock();
			if (gb.GetBlockState().GetType() == BlockType::loop)
			{
				// Go back to the start of the loop and re-evaluate the while-part
				gb.CurrentFileMachineState().lineNumber = gb.GetBlockState().GetLineNumber();
#if SUPPORT_ASYNC_MOVES
				gb.CurrentFileMachineState().fpos = gb.GetBlockState().GetFilePosition();
#endif
				gb.RestartFrom(gb.GetBlockState().GetFilePosition());