Method GetLineContExpr

source/script.cpp:2799–2932

ResultType Script::GetLineContExpr(TextStream *fp, LineBuffer &buf, LineBuffer &next_buf
	, LineNumberType &phys_line_number, bool &has_continuation_section)
// Determine whether buf has an unclosed (/[/{, and if so, complete the expression by
// appending subsequent lines until the number of opening and closing symbols balances out.
// Continuation lines and sections are assumed to have already been handled (and appended to
// buf) by a previous call to GetLineContinuation(), but **only up to the unbalanced line**;
// any subsequent contination is handled by this function.
{
	ActionTypeType action_type = ACT_INVALID; // Set default.
	ptrdiff_t action_end_pos = 0;

	size_t &buf_length = buf.length;
	size_t &next_buf_length = next_buf.length;

	TCHAR expect[MAX_BALANCEEXPR_DEPTH], open_quote = 0;
	int balance = BalanceExpr(buf, 0, expect);
	if (balance < 0 // Invalid.
		|| !buf_length // Blank (shouldn't happen as buf must already qualify as expression-like).
		|| next_buf_length == -1) // End of file.
		return balance == 0 ? OK : BalanceExprError(balance, expect, buf);
	
	// Perform rough checking for this line's action type.
	for (LPTSTR action_start = buf; ; )
	{
		LPTSTR action_end = find_identifier_end(action_start);
		if (action_end > action_start)
		{
			TCHAR orig_char = *action_end;
			// This relies on names of control flow statements being invalid for use as var/func names:
			if (IS_SPACE_OR_TAB(orig_char) || orig_char == '(' || orig_char == '{') // '{' supports "else{".
			{
				*action_end = '\0';
				action_type = ConvertActionType(action_start);
				*action_end = orig_char;

				if (action_type == ACT_ELSE || action_type == ACT_TRY || action_type == ACT_FINALLY)
				{
					action_start = omit_leading_whitespace(action_end);
					if (*action_start == '{')
						return OK; // This is unconditionally a block-begin, not an expression.
					continue; // Parse any same-line action instead.
				}

				if (mClassObjectCount && !g->CurrentFunc // In a class body.
					&& (action_end - action_start == 6) && !_tcsnicmp(action_start, _T("Static"), 6)) // Ignore "Static" modifier.
				{
					action_start = omit_leading_whitespace(action_end);
					continue;
				}
			}
		}
		action_end_pos = action_end - buf; // Use position since action_end will be invalidated if buf is reallocated.
		break;
	}

	do
	{
		if (balance == 0 && buf[buf_length - 1] == ':')