text: /* vi:set ts=8 sts=4 sw=4 noet:
   *
   * VIM - Vi IMproved	by Bram Moolenaar
   *
   * Do ":help uganda"  in Vim to read copying and usage conditions.
   * Do ":help credits" in Vim to see a list of people who contributed.
   * See README.txt for an overview of the Vim source code.
   */
  
  /*
   * ex_eval.c: functions for Ex command line for the +eval feature.
   */
  
  #include "vim.h"
  
  #if defined(FEAT_EVAL) || defined(PROTO)
  
  static char	*get_end_emsg(cstack_T *cstack);
  
  /*
   * Exception handling terms:
   *
   *	:try		":try" command		\
   *	    ...		try block		|
   *	:catch RE	":catch" command	|
   *	    ...		catch clause		|- try conditional
   *	:finally	":finally" command	|
   *	    ...		finally clause		|
   *	:endtry		":endtry" command	/
   *
   * The try conditional may have any number of catch clauses and at most one
   * finally clause.  A ":throw" command can be inside the try block, a catch
   * clause, the finally clause, or in a function called or script sourced from
   * there or even outside the try conditional.  Try conditionals may be nested.
   */
  
  /*
   * Configuration whether an exception is thrown on error or interrupt.  When
   * the preprocessor macros below evaluate to FALSE, an error (did_emsg) or
   * interrupt (got_int) under an active try conditional terminates the script
   * after the non-active finally clauses of all active try conditionals have been
   * executed.  Otherwise, errors and/or interrupts are converted into catchable
   * exceptions (did_throw additionally set), which terminate the script only if
   * not caught.  For user exceptions, only did_throw is set.  (Note: got_int can
   * be set asynchronously afterwards by a SIGINT, so did_throw && got_int is not
   * a reliant test that the exception currently being thrown is an interrupt
   * exception.  Similarly, did_emsg can be set afterwards on an error in an
   * (unskipped) conditional command inside an inactive conditional, so did_throw
   * && did_emsg is not a reliant test that the exception currently being thrown
   * is an error exception.)  -  The macros can be defined as expressions checking
   * for a variable that is allowed to be changed during execution of a script.
   */
  #if 0
  // Expressions used for testing during the development phase.
  # define THROW_ON_ERROR		(!eval_to_number("$VIMNOERRTHROW"))
  # define THROW_ON_INTERRUPT	(!eval_to_number("$VIMNOINTTHROW"))
  # define THROW_TEST
  #else
  // Values used for the Vim release.
  # define THROW_ON_ERROR		TRUE
  # define THROW_ON_ERROR_TRUE
  # define THROW_ON_INTERRUPT	TRUE
  # define THROW_ON_INTERRUPT_TRUE
  #endif
  
  /*
   * When several errors appear in a row, setting "force_abort" is delayed until
   * the failing command returned.  "cause_abort" is set to TRUE meanwhile, in
   * order to indicate that situation.  This is useful when "force_abort" was set
   * during execution of a function call from an expression: the aborting of the
   * expression evaluation is done without producing any error messages, but all
   * error messages on parsing errors during the expression evaluation are given
   * (even if a try conditional is active).
   */
  static int cause_abort = FALSE;
  
  /*
   * Return TRUE when immediately aborting on error, or when an interrupt
   * occurred or an exception was thrown but not caught.  Use for ":{range}call"
   * to check whether an aborted function that does not handle a range itself
   * should be called again for the next line in the range.  Also used for
   * cancelling expression evaluation after a function call caused an immediate
   * abort.  Note that the first emsg() call temporarily resets "force_abort"
   * until the throw point for error messages has been reached.  That is, during
   * cancellation of an expression evaluation after an aborting function call or
   * due to a parsing error, aborting() always returns the same value.
   * "got_int" is also set by calling interrupt().
   */
      int
  aborting(void)
  {
      return (did_emsg && force_abort) || got_int || did_throw;
  }
  
  /*
   * The value of "force_abort" is temporarily reset by the first emsg() call
   * during an expression evaluation, and "cause_abort" is used instead.  It might
   * be necessary to restore "force_abort" even before the throw point for the
   * error message has been reached.  update_force_abort() should be called then.
   */
      void
  update_force_abort(void)
  {
      if (cause_abort)
  	force_abort = TRUE;
  }
  
  /*
   * Return TRUE if a command with a subcommand resulting in "retcode" should
   * abort the script processing.  Can be used to suppress an autocommand after
   * execution of a failing subcommand as long as the error message has not been
   * displayed and actually caused the abortion.
   */
      int
  should_abort(int retcode)
  {
      return ((retcode == FAIL && trylevel != 0 && !emsg_silent) || aborting());
  }
  
  /*
   * Return TRUE if a function with the "abort" flag should not be considered
   * ended on an error.  This means that parsing commands is continued in order
   * to find finally clauses to be executed, and that some errors in skipped
   * commands are still reported.
   */
      int
  aborted_in_try(void)
  {
      // This function is only called after an error.  In this case, "force_abort"
      // determines whether searching for finally clauses is necessary.
      return force_abort;
  }
  
  /*
   * cause_errthrow(): Cause a throw of an error exception if appropriate.
   * Return TRUE if the error message should not be displayed by emsg().
   * Sets "ignore", if the emsg() call should be ignored completely.
   *
   * When several messages appear in the same command, the first is usually the
   * most specific one and used as the exception value.  The "severe" flag can be
   * set to TRUE, if a later but severer message should be used instead.
   */
      int
  cause_errthrow(
      char_u	*mesg,
      int		severe,
      int		*ignore)
  {
      msglist_T	*elem;
      msglist_T	**plist;
  
      /*
       * Do nothing when displaying the interrupt message or reporting an
       * uncaught exception (which has already been discarded then) at the top
       * level.  Also when no exception can be thrown.  The message will be
       * displayed by emsg().
       */
      if (suppress_errthrow)
  	return FALSE;
  
      /*
       * If emsg() has not been called previously, temporarily reset
       * "force_abort" until the throw point for error messages has been
       * reached.  This ensures that aborting() returns the same value for all
       * errors that appear in the same command.  This means particularly that
       * for parsing errors during expression evaluation emsg() will be called
       * multiply, even when the expression is evaluated from a finally clause
       * that was activated due to an aborting error, interrupt, or exception.
       */
      if (!did_emsg)
      {
  	cause_abort = force_abort;
  	force_abort = FALSE;
      }
  
      /*
       * If no try conditional is active and no exception is being thrown and
       * there has not been an error in a try conditional or a throw so far, do
       * nothing (for compatibility of non-EH scripts).  The message will then
       * be displayed by emsg().  When ":silent!" was used and we are not
       * currently throwing an exception, do nothing.  The message text will
       * then be stored to v:errmsg by emsg() without displaying it.
       */
      if (((trylevel == 0 && !cause_abort) || emsg_silent) && !did_throw)
  	return FALSE;
  
      /*
       * Ignore an interrupt message when inside a try conditional or when an
       * exception is being thrown or when an error in a try conditional or
       * throw has been detected previously.  This is important in order that an
       * interrupt exception is catchable by the innermost try conditional and
       * not replaced by an interrupt message error exception.
       */
      if (mesg == (char_u *)_(e_interr))
      {
  	*ignore = TRUE;
  	return TRUE;
      }
  
      /*
       * Ensure that all commands in nested function calls and sourced files
       * are aborted immediately.
       */
      cause_abort = TRUE;
  
      /*
       * When an exception is being thrown, some commands (like conditionals) are
       * not skipped.  Errors in those commands may affect what of the subsequent
       * commands are regarded part of catch and finally clauses.  Catching the
       * exception would then cause execution of commands not intended by the
       * user, who wouldn't even get aware of the problem.  Therefor, discard the
       * exception currently being thrown to prevent it from being caught.  Just
       * execute finally clauses and terminate.
       */
      if (did_throw)
      {
  	// When discarding an interrupt exception, reset got_int to prevent the
  	// same interrupt being converted to an exception again and discarding
  	// the error exception we are about to throw here.
  	if (current_exception->type == ET_INTERRUPT)
  	    got_int = FALSE;
  	discard_current_exception();
      }
  
  #ifdef THROW_TEST
      if (!THROW_ON_ERROR)
      {
  	/*
  	 * Print error message immediately without searching for a matching
  	 * catch clause; just finally clauses are executed before the script
  	 * is terminated.
  	 */
  	return FALSE;
      }
      else
  #endif
      {
  	/*
  	 * Prepare the throw of an error exception, so that everything will
  	 * be aborted (except for executing finally clauses), until the error
  	 * exception is caught; if still uncaught at the top level, the error
  	 * message will be displayed and the script processing terminated
  	 * then.  -  This function has no access to the conditional stack.
  	 * Thus, the actual throw is made after the failing command has
  	 * returned.  -  Throw only the first of several errors in a row, except
  	 * a severe error is following.
  	 */
  	if (msg_list != NULL)
  	{
  	    plist = msg_list;
  	    while (*plist != NULL)
  		plist = &(*plist)->next;
  
  	    elem = ALLOC_CLEAR_ONE(msglist_T);
  	    if (elem == NULL)
  	    {
  		suppress_errthrow = TRUE;
  		emsg(_(e_outofmem));
  	    }
  	    else
  	    {
  		elem->msg = (char *)vim_strsave(mesg);
  		if (elem->msg == NULL)
  		{
  		    vim_free(elem);
  		    suppress_errthrow = TRUE;
  		    emsg(_(e_outofmem));
  		}
  		else
  		{
  		    elem->next = NULL;
  		    elem->throw_msg = NULL;
  		    *plist = elem;
  		    if (plist == msg_list || severe)
  		    {
  			char	    *tmsg;
  
  			// Skip the extra "Vim " prefix for message "E458".
  			tmsg = elem->msg;
  			if (STRNCMP(tmsg, "Vim E", 5) == 0
  				&& VIM_ISDIGIT(tmsg[5])
  				&& VIM_ISDIGIT(tmsg[6])
  				&& VIM_ISDIGIT(tmsg[7])
  				&& tmsg[8] == ':'
  				&& tmsg[9] == ' ')
  			    (*msg_list)->throw_msg = &tmsg[4];
  			else
  			    (*msg_list)->throw_msg = tmsg;
  		    }
  
  		    // Get the source name and lnum now, it may change before
  		    // reaching do_errthrow().
  		    elem->sfile = estack_sfile();
  		    elem->slnum = SOURCING_LNUM;
  		}
  	    }
  	}
  	return TRUE;
      }
  }
  
  /*
   * Free a "msg_list" and the messages it contains.
   */
      static void
  free_msglist(msglist_T *l)
  {
      msglist_T  *messages, *next;
  
      messages = l;
      while (messages != NULL)
      {
  	next = messages->next;
  	vim_free(messages->msg);
  	vim_free(messages->sfile);
  	vim_free(messages);
  	messages = next;
      }
  }
  
  /*
   * Free global "*msg_list" and the messages it contains, then set "*msg_list"
   * to NULL.
   */
      void
  free_global_msglist(void)
  {
      free_msglist(*msg_list);
      *msg_list = NULL;
  }
  
  /*
   * Throw the message specified in the call to cause_errthrow() above as an
   * error exception.  If cstack is NULL, postpone the throw until do_cmdline()
   * has returned (see do_one_cmd()).
   */
      void
  do_errthrow(cstack_T *cstack, char_u *cmdname)
  {
      /*
       * Ensure that all commands in nested function calls and sourced files
       * are aborted immediately.
       */
      if (cause_abort)
      {
  	cause_abort = FALSE;
  	force_abort = TRUE;
      }
  
      // If no exception is to be thrown or the conversion should be done after
      // returning to a previous invocation of do_one_cmd(), do nothing.
      if (msg_list == NULL || *msg_list == NULL)
  	return;
  
      if (throw_exception(*msg_list, ET_ERROR, cmdname) == FAIL)
  	free_msglist(*msg_list);
      else
      {
  	if (cstack != NULL)
  	    do_throw(cstack);
  	else
  	    need_rethrow = TRUE;
      }
      *msg_list = NULL;
  }
  
  /*
   * do_intthrow(): Replace the current exception by an interrupt or interrupt
   * exception if appropriate.  Return TRUE if the current exception is discarded,
   * FALSE otherwise.
   */
      int
  do_intthrow(cstack_T *cstack)
  {
      /*
       * If no interrupt occurred or no try conditional is active and no exception
       * is being thrown, do nothing (for compatibility of non-EH scripts).
       */
      if (!got_int || (trylevel == 0 && !did_throw))
  	return FALSE;
  
  #ifdef THROW_TEST	// avoid warning for condition always true
      if (!THROW_ON_INTERRUPT)
      {
  	/*
  	 * The interrupt aborts everything except for executing finally clauses.
  	 * Discard any user or error or interrupt exception currently being
  	 * thrown.
  	 */
  	if (did_throw)
  	    discard_current_exception();
      }
      else
  #endif
      {
  	/*
  	 * Throw an interrupt exception, so that everything will be aborted
  	 * (except for executing finally clauses), until the interrupt exception
  	 * is caught; if still uncaught at the top level, the script processing
  	 * will be terminated then.  -  If an interrupt exception is already
  	 * being thrown, do nothing.
  	 *
  	 */
  	if (did_throw)
  	{
  	    if (current_exception->type == ET_INTERRUPT)
  		return FALSE;
  
  	    // An interrupt exception replaces any user or error exception.
  	    discard_current_exception();
  	}
  	if (throw_exception("Vim:Interrupt", ET_INTERRUPT, NULL) != FAIL)
  	    do_throw(cstack);
      }
  
      return TRUE;
  }
  
  /*
   * Get an exception message that is to be stored in current_exception->value.
   */
      char *
  get_exception_string(
      void	*value,
      except_type_T type,
      char_u	*cmdname,
      int		*should_free)
  {
      char	*ret;
      char	*mesg;
      int		cmdlen;
      char	*p, *val;
  
      if (type == ET_ERROR)
      {
  	*should_free = TRUE;
  	mesg = ((msglist_T *)value)->throw_msg;
  	if (cmdname != NULL && *cmdname != NUL)
  	{
  	    cmdlen = (int)STRLEN(cmdname);
  	    ret = (char *)vim_strnsave((char_u *)"Vim(",
  						4 + cmdlen + 2 + STRLEN(mesg));
  	    if (ret == NULL)
  		return ret;
  	    STRCPY(&ret[4], cmdname);
  	    STRCPY(&ret[4 + cmdlen], "):");
  	    val = ret + 4 + cmdlen + 2;
  	}
  	else
  	{
  	    ret = (char *)vim_strnsave((char_u *)"Vim:", 4 + STRLEN(mesg));
  	    if (ret == NULL)
  		return ret;
  	    val = ret + 4;
  	}
  
  	// msg_add_fname may have been used to prefix the message with a file
  	// name in quotes.  In the exception value, put the file name in
  	// parentheses and move it to the end.
  	for (p = mesg; ; p++)
  	{
  	    if (*p == NUL
  		    || (*p == 'E'
  			&& VIM_ISDIGIT(p[1])
  			&& (p[2] == ':'
  			    || (VIM_ISDIGIT(p[2])
  				&& (p[3] == ':'
  				    || (VIM_ISDIGIT(p[3])
  					&& p[4] == ':'))))))
  	    {
  		if (*p == NUL || p == mesg)
  		    STRCAT(val, mesg);  // 'E123' missing or at beginning
  		else
  		{
  		    // '"filename" E123: message text'
  		    if (mesg[0] != '"' || p-2 < &mesg[1] ||
  			    p[-2] != '"' || p[-1] != ' ')
  			// "E123:" is part of the file name.
  			continue;
  
  		    STRCAT(val, p);
  		    p[-2] = NUL;
  		    sprintf((char *)(val + STRLEN(p)), " (%s)", &mesg[1]);
  		    p[-2] = '"';
  		}
  		break;
  	    }
  	}
      }
      else
      {
  	*should_free = FALSE;
  	ret = value;
      }
  
      return ret;
  }
  
  
  /*
   * Throw a new exception.  Return FAIL when out of memory or it was tried to
   * throw an illegal user exception.  "value" is the exception string for a
   * user or interrupt exception, or points to a message list in case of an
   * error exception.
   */
      int
  throw_exception(void *value, except_type_T type, char_u *cmdname)
  {
      except_T	*excp;
      int		should_free;
  
      /*
       * Disallow faking Interrupt or error exceptions as user exceptions.  They
       * would be treated differently from real interrupt or error exceptions
       * when no active try block is found, see do_cmdline().
       */
      if (type == ET_USER)
      {
  	if (STRNCMP((char_u *)value, "Vim", 3) == 0
  		&& (((char_u *)value)[3] == NUL || ((char_u *)value)[3] == ':'
  		    || ((char_u *)value)[3] == '('))
  	{
  	    emsg(_("E608: Cannot :throw exceptions with 'Vim' prefix"));
  	    goto fail;
  	}
      }
  
      excp = ALLOC_ONE(except_T);
      if (excp == NULL)
  	goto nomem;
  
      if (type == ET_ERROR)
  	// Store the original message and prefix the exception value with
  	// "Vim:" or, if a command name is given, "Vim(cmdname):".
  	excp->messages = (msglist_T *)value;
  
      excp->value = get_exception_string(value, type, cmdname, &should_free);
      if (excp->value == NULL && should_free)
  	goto nomem;
  
      excp->type = type;
      if (type == ET_ERROR && ((msglist_T *)value)->sfile != NULL)
      {
  	msglist_T *entry = (msglist_T *)value;
  
  	excp->throw_name = entry->sfile;
  	entry->sfile = NULL;
  	excp->throw_lnum = entry->slnum;
      }
      else
      {
  	excp->throw_name = estack_sfile();
  	if (excp->throw_name == NULL)
  	    excp->throw_name = vim_strsave((char_u *)"");
  	if (excp->throw_name == NULL)
  	{
  	    if (should_free)
  		vim_free(excp->value);
  	    goto nomem;
  	}
  	excp->throw_lnum = SOURCING_LNUM;
      }
  
      if (p_verbose >= 13 || debug_break_level > 0)
      {
  	int	save_msg_silent = msg_silent;
  
  	if (debug_break_level > 0)
  	    msg_silent = FALSE;		// display messages
  	else
  	    verbose_enter();
  	++no_wait_return;
  	if (debug_break_level > 0 || *p_vfile == NUL)
  	    msg_scroll = TRUE;	    // always scroll up, don't overwrite
  
  	smsg(_("Exception thrown: %s"), excp->value);
  	msg_puts("\n");   // don't overwrite this either
  
  	if (debug_break_level > 0 || *p_vfile == NUL)
  	    cmdline_row = msg_row;
  	--no_wait_return;
  	if (debug_break_level > 0)
  	    msg_silent = save_msg_silent;
  	else
  	    verbose_leave();
      }
  
      current_exception = excp;
      return OK;
  
  nomem:
      vim_free(excp);
      suppress_errthrow = TRUE;
      emsg(_(e_outofmem));
  fail:
      current_exception = NULL;
      return FAIL;
  }
  
  /*
   * Discard an exception.  "was_finished" is set when the exception has been
   * caught and the catch clause has been ended normally.
   */
      static void
  discard_exception(except_T *excp, int was_finished)
  {
      char_u		*saved_IObuff;
  
      if (excp == NULL)
      {
  	internal_error("discard_exception()");
  	return;
      }
  
      if (p_verbose >= 13 || debug_break_level > 0)
      {
  	int	save_msg_silent = msg_silent;
  
  	saved_IObuff = vim_strsave(IObuff);
  	if (debug_break_level > 0)
  	    msg_silent = FALSE;		// display messages
  	else
  	    verbose_enter();
  	++no_wait_return;
  	if (debug_break_level > 0 || *p_vfile == NUL)
  	    msg_scroll = TRUE;	    // always scroll up, don't overwrite
  	smsg(was_finished
  		    ? _("Exception finished: %s")
  		    : _("Exception discarded: %s"),
  		excp->value);
  	msg_puts("\n");   // don't overwrite this either
  	if (debug_break_level > 0 || *p_vfile == NUL)
  	    cmdline_row = msg_row;
  	--no_wait_return;
  	if (debug_break_level > 0)
  	    msg_silent = save_msg_silent;
  	else
  	    verbose_leave();
  	STRCPY(IObuff, saved_IObuff);
  	vim_free(saved_IObuff);
      }
      if (excp->type != ET_INTERRUPT)
  	vim_free(excp->value);
      if (excp->type == ET_ERROR)
  	free_msglist(excp->messages);
      vim_free(excp->throw_name);
      vim_free(excp);
  }
  
  /*
   * Discard the exception currently being thrown.
   */
      void
  discard_current_exception(void)
  {
      if (current_exception != NULL)
      {
  	discard_exception(current_exception, FALSE);
  	current_exception = NULL;
      }
      did_throw = FALSE;
      need_rethrow = FALSE;
  }
  
  /*
   * Put an exception on the caught stack.
   */
      void
  catch_exception(except_T *excp)
  {
      excp->caught = caught_stack;
      caught_stack = excp;
      set_vim_var_string(VV_EXCEPTION, (char_u *)excp->value, -1);
      if (*excp->throw_name != NUL)
      {
  	if (excp->throw_lnum != 0)
  	    vim_snprintf((char *)IObuff, IOSIZE, _("%s, line %ld"),
  				    excp->throw_name, (long)excp->throw_lnum);
  	else
  	    vim_snprintf((char *)IObuff, IOSIZE, "%s", excp->throw_name);
  	set_vim_var_string(VV_THROWPOINT, IObuff, -1);
      }
      else
  	// throw_name not set on an exception from a command that was typed.
  	set_vim_var_string(VV_THROWPOINT, NULL, -1);
  
      if (p_verbose >= 13 || debug_break_level > 0)
      {
  	int	save_msg_silent = msg_silent;
  
  	if (debug_break_level > 0)
  	    msg_silent = FALSE;		// display messages
  	else
  	    verbose_enter();
  	++no_wait_return;
  	if (debug_break_level > 0 || *p_vfile == NUL)
  	    msg_scroll = TRUE;	    // always scroll up, don't overwrite
  
  	smsg(_("Exception caught: %s"), excp->value);
  	msg_puts("\n");   // don't overwrite this either
  
  	if (debug_break_level > 0 || *p_vfile == NUL)
  	    cmdline_row = msg_row;
  	--no_wait_return;
  	if (debug_break_level > 0)
  	    msg_silent = save_msg_silent;
  	else
  	    verbose_leave();
      }
  }
  
  /*
   * Remove an exception from the caught stack.
   */
      static void
  finish_exception(except_T *excp)
  {
      if (excp != caught_stack)
  	internal_error("finish_exception()");
      caught_stack = caught_stack->caught;
      if (caught_stack != NULL)
      {
  	set_vim_var_string(VV_EXCEPTION, (char_u *)caught_stack->value, -1);
  	if (*caught_stack->throw_name != NUL)
  	{
  	    if (caught_stack->throw_lnum != 0)
  		vim_snprintf((char *)IObuff, IOSIZE,
  			_("%s, line %ld"), caught_stack->throw_name,
  			(long)caught_stack->throw_lnum);
  	    else
  		vim_snprintf((char *)IObuff, IOSIZE, "%s",
  						    caught_stack->throw_name);
  	    set_vim_var_string(VV_THROWPOINT, IObuff, -1);
  	}
  	else
  	    // throw_name not set on an exception from a command that was
  	    // typed.
  	    set_vim_var_string(VV_THROWPOINT, NULL, -1);
      }
      else
      {
  	set_vim_var_string(VV_EXCEPTION, NULL, -1);
  	set_vim_var_string(VV_THROWPOINT, NULL, -1);
      }
  
      // Discard the exception, but use the finish message for 'verbose'.
      discard_exception(excp, TRUE);
  }
  
  /*
   * Flags specifying the message displayed by report_pending.
   */
  #define RP_MAKE		0
  #define RP_RESUME	1
  #define RP_DISCARD	2
  
  /*
   * Report information about something pending in a finally clause if required by
   * the 'verbose' option or when debugging.  "action" tells whether something is
   * made pending or something pending is resumed or discarded.  "pending" tells
   * what is pending.  "value" specifies the return value for a pending ":return"
   * or the exception value for a pending exception.
   */
      static void
  report_pending(int action, int pending, void *value)
  {
      char	*mesg;
      char	*s;
      int		save_msg_silent;
  
  
      switch (action)
      {
  	case RP_MAKE:
  	    mesg = _("%s made pending");
  	    break;
  	case RP_RESUME:
  	    mesg = _("%s resumed");
  	    break;
  	// case RP_DISCARD:
  	default:
  	    mesg = _("%s discarded");
  	    break;
      }
  
      switch (pending)
      {
  	case CSTP_NONE:
  	    return;
  
  	case CSTP_CONTINUE:
  	    s = ":continue";
  	    break;
  	case CSTP_BREAK:
  	    s = ":break";
  	    break;
  	case CSTP_FINISH:
  	    s = ":finish";
  	    break;
  	case CSTP_RETURN:
  	    // ":return" command producing value, allocated
  	    s = (char *)get_return_cmd(value);
  	    break;
  
  	default:
  	    if (pending & CSTP_THROW)
  	    {
  		vim_snprintf((char *)IObuff, IOSIZE, mesg, _("Exception"));
  		mesg = (char *)vim_strnsave(IObuff, STRLEN(IObuff) + 4);
  		STRCAT(mesg, ": %s");
  		s = (char *)((except_T *)value)->value;
  	    }
  	    else if ((pending & CSTP_ERROR) && (pending & CSTP_INTERRUPT))
  		s = _("Error and interrupt");
  	    else if (pending & CSTP_ERROR)
  		s = _("Error");
  	    else // if (pending & CSTP_INTERRUPT)
  		s = _("Interrupt");
      }
  
      save_msg_silent = msg_silent;
      if (debug_break_level > 0)
  	msg_silent = FALSE;	// display messages
      ++no_wait_return;
      msg_scroll = TRUE;		// always scroll up, don't overwrite
      smsg(mesg, s);
      msg_puts("\n");   // don't overwrite this either
      cmdline_row = msg_row;
      --no_wait_return;
      if (debug_break_level > 0)
  	msg_silent = save_msg_silent;
  
      if (pending == CSTP_RETURN)
  	vim_free(s);
      else if (pending & CSTP_THROW)
  	vim_free(mesg);
  }
  
  /*
   * If something is made pending in a finally clause, report it if required by
   * the 'verbose' option or when debugging.
   */
      void
  report_make_pending(int pending, void *value)
  {
      if (p_verbose >= 14 || debug_break_level > 0)
      {
  	if (debug_break_level <= 0)
  	    verbose_enter();
  	report_pending(RP_MAKE, pending, value);
  	if (debug_break_level <= 0)
  	    verbose_leave();
      }
  }
  
  /*
   * If something pending in a finally clause is resumed at the ":endtry", report
   * it if required by the 'verbose' option or when debugging.
   */
      static void
  report_resume_pending(int pending, void *value)
  {
      if (p_verbose >= 14 || debug_break_level > 0)
      {
  	if (debug_break_level <= 0)
  	    verbose_enter();
  	report_pending(RP_RESUME, pending, value);
  	if (debug_break_level <= 0)
  	    verbose_leave();
      }
  }
  
  /*
   * If something pending in a finally clause is discarded, report it if required
   * by the 'verbose' option or when debugging.
   */
      static void
  report_discard_pending(int pending, void *value)
  {
      if (p_verbose >= 14 || debug_break_level > 0)
      {
  	if (debug_break_level <= 0)
  	    verbose_enter();
  	report_pending(RP_DISCARD, pending, value);
  	if (debug_break_level <= 0)
  	    verbose_leave();
      }
  }
  
  
  /*
   * ":eval".
   */
      void
  ex_eval(exarg_T *eap)
  {
      typval_T	tv;
      evalarg_T	evalarg;
  
      fill_evalarg_from_eap(&evalarg, eap, eap->skip);
  
      if (eval0(eap->arg, &tv, eap, &evalarg) == OK)
  	clear_tv(&tv);
  
      clear_evalarg(&evalarg, eap);
  }
  
  /*
   * ":if".
   */
      void
  ex_if(exarg_T *eap)
  {
      int		error;
      int		skip;
      int		result;
      cstack_T	*cstack = eap->cstack;
  
      if (cstack->cs_idx == CSTACK_LEN - 1)
  	eap->errmsg = N_("E579: :if nesting too deep");
      else
      {
  	++cstack->cs_idx;
  	cstack->cs_flags[cstack->cs_idx] = 0;
  
  	/*
  	 * Don't do something after an error, interrupt, or throw, or when there
  	 * is a surrounding conditional and it was not active.
  	 */
  	skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
  		&& !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE));
  
  	result = eval_to_bool(eap->arg, &error, eap, skip);
  
  	if (!skip && !error)
  	{
  	    if (result)
  		cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE;
  	}
  	else
  	    // set TRUE, so this conditional will never get active
  	    cstack->cs_flags[cstack->cs_idx] = CSF_TRUE;
      }
  }
  
  /*
   * ":endif".
   */
      void
  ex_endif(exarg_T *eap)
  {
      did_endif = TRUE;
      if (eap->cstack->cs_idx < 0
  	    || (eap->cstack->cs_flags[eap->cstack->cs_idx]
  					   & (CSF_WHILE | CSF_FOR | CSF_TRY)))
  	eap->errmsg = N_(e_endif_without_if);
      else
      {
  	/*
  	 * When debugging or a breakpoint was encountered, display the debug
  	 * prompt (if not already done).  This shows the user that an ":endif"
  	 * is executed when the ":if" or a previous ":elseif" was not TRUE.
  	 * Handle a ">quit" debug command as if an interrupt had occurred before
  	 * the ":endif".  That is, throw an interrupt exception if appropriate.
  	 * Doing this here prevents an exception for a parsing error being
  	 * discarded by throwing the interrupt exception later on.
  	 */
  	if (!(eap->cstack->cs_flags[eap->cstack->cs_idx] & CSF_TRUE)
  						    && dbg_check_skipped(eap))
  	    (void)do_intthrow(eap->cstack);
  
  	--eap->cstack->cs_idx;
      }
  }
  
  /*
   * ":else" and ":elseif".
   */
      void
  ex_else(exarg_T *eap)
  {
      int		error;
      int		skip;
      int		result;
      cstack_T	*cstack = eap->cstack;
  
      /*
       * Don't do something after an error, interrupt, or throw, or when there is
       * a surrounding conditional and it was not active.
       */
      skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
  	    && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE));
  
      if (cstack->cs_idx < 0
  	    || (cstack->cs_flags[cstack->cs_idx]
  					   & (CSF_WHILE | CSF_FOR | CSF_TRY)))
      {
  	if (eap->cmdidx == CMD_else)
  	{
  	    eap->errmsg = N_(e_else_without_if);
  	    return;
  	}
  	eap->errmsg = N_(e_elseif_without_if);
  	skip = TRUE;
      }
      else if (cstack->cs_flags[cstack->cs_idx] & CSF_ELSE)
      {
  	if (eap->cmdidx == CMD_else)
  	{
  	    eap->errmsg = N_("E583: multiple :else");
  	    return;
  	}
  	eap->errmsg = N_("E584: :elseif after :else");
  	skip = TRUE;
      }
  
      // if skipping or the ":if" was TRUE, reset ACTIVE, otherwise set it
      if (skip || cstack->cs_flags[cstack->cs_idx] & CSF_TRUE)
      {
  	if (eap->errmsg == NULL)
  	    cstack->cs_flags[cstack->cs_idx] = CSF_TRUE;
  	skip = TRUE;	// don't evaluate an ":elseif"
      }
      else
  	cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE;
  
      /*
       * When debugging or a breakpoint was encountered, display the debug prompt
       * (if not already done).  This shows the user that an ":else" or ":elseif"
       * is executed when the ":if" or previous ":elseif" was not TRUE.  Handle
       * a ">quit" debug command as if an interrupt had occurred before the
       * ":else" or ":elseif".  That is, set "skip" and throw an interrupt
       * exception if appropriate.  Doing this here prevents that an exception
       * for a parsing errors is discarded when throwing the interrupt exception
       * later on.
       */
      if (!skip && dbg_check_skipped(eap) && got_int)
      {
  	(void)do_intthrow(cstack);
  	skip = TRUE;
      }
  
      if (eap->cmdidx == CMD_elseif)
      {
  	result = eval_to_bool(eap->arg, &error, eap, skip);
  
  	// When throwing error exceptions, we want to throw always the first
  	// of several errors in a row.  This is what actually happens when
  	// a conditional error was detected above and there is another failure
  	// when parsing the expression.  Since the skip flag is set in this
  	// case, the parsing error will be ignored by emsg().
  	if (!skip && !error)
  	{
  	    if (result)
  		cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE;
  	    else
  		cstack->cs_flags[cstack->cs_idx] = 0;
  	}
  	else if (eap->errmsg == NULL)
  	    // set TRUE, so this conditional will never get active
  	    cstack->cs_flags[cstack->cs_idx] = CSF_TRUE;
      }
      else
  	cstack->cs_flags[cstack->cs_idx] |= CSF_ELSE;
  }
  
  /*
   * Handle ":while" and ":for".
   */
      void
  ex_while(exarg_T *eap)
  {
      int		error;
      int		skip;
      int		result;
      cstack_T	*cstack = eap->cstack;
  
      if (cstack->cs_idx == CSTACK_LEN - 1)
  	eap->errmsg = N_("E585: :while/:for nesting too deep");
      else
      {
  	/*
  	 * The loop flag is set when we have jumped back from the matching
  	 * ":endwhile" or ":endfor".  When not set, need to initialise this
  	 * cstack entry.
  	 */
  	if ((cstack->cs_lflags & CSL_HAD_LOOP) == 0)
  	{
  	    ++cstack->cs_idx;
  	    ++cstack->cs_looplevel;
  	    cstack->cs_line[cstack->cs_idx] = -1;
  	}
  	cstack->cs_flags[cstack->cs_idx] =
  			       eap->cmdidx == CMD_while ? CSF_WHILE : CSF_FOR;
  
  	/*
  	 * Don't do something after an error, interrupt, or throw, or when
  	 * there is a surrounding conditional and it was not active.
  	 */
  	skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
  		&& !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE));
  	if (eap->cmdidx == CMD_while)
  	{
  	    /*
  	     * ":while bool-expr"
  	     */
  	    result = eval_to_bool(eap->arg, &error, eap, skip);
  	}
  	else
  	{
  	    void	*fi;
  	    evalarg_T	evalarg;
  
  	    CLEAR_FIELD(evalarg);
  	    evalarg.eval_flags = skip ? 0 : EVAL_EVALUATE;
  	    if (getline_equal(eap->getline, eap->cookie, getsourceline))
  	    {
  		evalarg.eval_getline = eap->getline;
  		evalarg.eval_cookie = eap->cookie;
  	    }
  
  	    /*
  	     * ":for var in list-expr"
  	     */
  	    if ((cstack->cs_lflags & CSL_HAD_LOOP) != 0)
  	    {
  		// Jumping here from a ":continue" or ":endfor": use the
  		// previously evaluated list.
  		fi = cstack->cs_forinfo[cstack->cs_idx];
  		error = FALSE;
  
  		// the "in expr" is not used, skip over it
  		skip_for_lines(fi, &evalarg);
  	    }
  	    else
  	    {
  		// Evaluate the argument and get the info in a structure.
  		fi = eval_for_line(eap->arg, &error, eap, &evalarg);
  		cstack->cs_forinfo[cstack->cs_idx] = fi;
  	    }
  
  	    // use the element at the start of the list and advance
  	    if (!error && fi != NULL && !skip)
  		result = next_for_item(fi, eap->arg);
  	    else
  		result = FALSE;
  
  	    if (!result)
  	    {
  		free_for_info(fi);
  		cstack->cs_forinfo[cstack->cs_idx] = NULL;
  	    }
  	    clear_evalarg(&evalarg, eap);
  	}
  
  	/*
  	 * If this cstack entry was just initialised and is active, set the
  	 * loop flag, so do_cmdline() will set the line number in cs_line[].
  	 * If executing the command a second time, clear the loop flag.
  	 */
  	if (!skip && !error && result)
  	{
  	    cstack->cs_flags[cstack->cs_idx] |= (CSF_ACTIVE | CSF_TRUE);
  	    cstack->cs_lflags ^= CSL_HAD_LOOP;
  	}
  	else
  	{
  	    cstack->cs_lflags &= ~CSL_HAD_LOOP;
  	    // If the ":while" evaluates to FALSE or ":for" is past the end of
  	    // the list, show the debug prompt at the ":endwhile"/":endfor" as
  	    // if there was a ":break" in a ":while"/":for" evaluating to
  	    // TRUE.
  	    if (!skip && !error)
  		cstack->cs_flags[cstack->cs_idx] |= CSF_TRUE;
  	}
      }
  }
  
  /*
   * ":continue"
   */
      void
  ex_continue(exarg_T *eap)
  {
      int		idx;
      cstack_T	*cstack = eap->cstack;
  
      if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0)
  	eap->errmsg = N_(e_continue);
      else
      {
  	// Try to find the matching ":while".  This might stop at a try
  	// conditional not in its finally clause (which is then to be executed
  	// next).  Therefor, inactivate all conditionals except the ":while"
  	// itself (if reached).
  	idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE);
  	if (idx >= 0 && (cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR)))
  	{
  	    rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel);
  
  	    /*
  	     * Set CSL_HAD_CONT, so do_cmdline() will jump back to the
  	     * matching ":while".
  	     */
  	    cstack->cs_lflags |= CSL_HAD_CONT;	// let do_cmdline() handle it
  	}
  	else
  	{
  	    // If a try conditional not in its finally clause is reached first,
  	    // make the ":continue" pending for execution at the ":endtry".
  	    cstack->cs_pending[idx] = CSTP_CONTINUE;
  	    report_make_pending(CSTP_CONTINUE, NULL);
  	}
      }
  }
  
  /*
   * ":break"
   */
      void
  ex_break(exarg_T *eap)
  {
      int		idx;
      cstack_T	*cstack = eap->cstack;
  
      if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0)
  	eap->errmsg = N_(e_break);
      else
      {
  	// Inactivate conditionals until the matching ":while" or a try
  	// conditional not in its finally clause (which is then to be
  	// executed next) is found.  In the latter case, make the ":break"
  	// pending for execution at the ":endtry".
  	idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, TRUE);
  	if (idx >= 0 && !(cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR)))
  	{
  	    cstack->cs_pending[idx] = CSTP_BREAK;
  	    report_make_pending(CSTP_BREAK, NULL);
  	}
      }
  }
  
  /*
   * ":endwhile" and ":endfor"
   */
      void
  ex_endwhile(exarg_T *eap)
  {
      cstack_T	*cstack = eap->cstack;
      int		idx;
      char	*err;
      int		csf;
      int		fl;
  
      if (eap->cmdidx == CMD_endwhile)
      {
  	err = e_while;
  	csf = CSF_WHILE;
      }
      else
      {
  	err = e_for;
  	csf = CSF_FOR;
      }
  
      if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0)
  	eap->errmsg = err;
      else
      {
  	fl =  cstack->cs_flags[cstack->cs_idx];
  	if (!(fl & csf))
  	{
  	    // If we are in a ":while" or ":for" but used the wrong endloop
  	    // command, do not rewind to the next enclosing ":for"/":while".
  	    if (fl & CSF_WHILE)
  		eap->errmsg = _("E732: Using :endfor with :while");
  	    else if (fl & CSF_FOR)
  		eap->errmsg = _("E733: Using :endwhile with :for");
  	}
  	if (!(fl & (CSF_WHILE | CSF_FOR)))
  	{
  	    if (!(fl & CSF_TRY))
  		eap->errmsg = e_endif;
  	    else if (fl & CSF_FINALLY)
  		eap->errmsg = e_endtry;
  	    // Try to find the matching ":while" and report what's missing.
  	    for (idx = cstack->cs_idx; idx > 0; --idx)
  	    {
  		fl =  cstack->cs_flags[idx];
  		if ((fl & CSF_TRY) && !(fl & CSF_FINALLY))
  		{
  		    // Give up at a try conditional not in its finally clause.
  		    // Ignore the ":endwhile"/":endfor".
  		    eap->errmsg = err;
  		    return;
  		}
  		if (fl & csf)
  		    break;
  	    }
  	    // Cleanup and rewind all contained (and unclosed) conditionals.
  	    (void)cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE);
  	    rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel);
  	}
  
  	/*
  	 * When debugging or a breakpoint was encountered, display the debug
  	 * prompt (if not already done).  This shows the user that an
  	 * ":endwhile"/":endfor" is executed when the ":while" was not TRUE or
  	 * after a ":break".  Handle a ">quit" debug command as if an
  	 * interrupt had occurred before the ":endwhile"/":endfor".  That is,
  	 * throw an interrupt exception if appropriate.  Doing this here
  	 * prevents that an exception for a parsing error is discarded when
  	 * throwing the interrupt exception later on.
  	 */
  	else if (cstack->cs_flags[cstack->cs_idx] & CSF_TRUE
  		&& !(cstack->cs_flags[cstack->cs_idx] & CSF_ACTIVE)
  		&& dbg_check_skipped(eap))
  	    (void)do_intthrow(cstack);
  
  	/*
  	 * Set loop flag, so do_cmdline() will jump back to the matching
  	 * ":while" or ":for".
  	 */
  	cstack->cs_lflags |= CSL_HAD_ENDLOOP;
      }
  }
  
  
  /*
   * ":throw expr"
   */
      void
  ex_throw(exarg_T *eap)
  {
      char_u	*arg = eap->arg;
      char_u	*value;
  
      if (*arg != NUL && *arg != '|' && *arg != '\n')
  	value = eval_to_string_skip(arg, eap, eap->skip);
      else
      {
  	emsg(_(e_argreq));
  	value = NULL;
      }
  
      // On error or when an exception is thrown during argument evaluation, do
      // not throw.
      if (!eap->skip && value != NULL)
      {
  	if (throw_exception(value, ET_USER, NULL) == FAIL)
  	    vim_free(value);
  	else
  	    do_throw(eap->cstack);
      }
  }
  
  /*
   * Throw the current exception through the specified cstack.  Common routine
   * for ":throw" (user exception) and error and interrupt exceptions.  Also
   * used for rethrowing an uncaught exception.
   */
      void
  do_throw(cstack_T *cstack)
  {
      int		idx;
      int		inactivate_try = FALSE;
  
      /*
       * Cleanup and inactivate up to the next surrounding try conditional that
       * is not in its finally clause.  Normally, do not inactivate the try
       * conditional itself, so that its ACTIVE flag can be tested below.  But
       * if a previous error or interrupt has not been converted to an exception,
       * inactivate the try conditional, too, as if the conversion had been done,
       * and reset the did_emsg or got_int flag, so this won't happen again at
       * the next surrounding try conditional.
       */
  #ifndef THROW_ON_ERROR_TRUE
      if (did_emsg && !THROW_ON_ERROR)
      {
  	inactivate_try = TRUE;
  	did_emsg = FALSE;
      }
  #endif
  #ifndef THROW_ON_INTERRUPT_TRUE
      if (got_int && !THROW_ON_INTERRUPT)
      {
  	inactivate_try = TRUE;
  	got_int = FALSE;
      }
  #endif
      idx = cleanup_conditionals(cstack, 0, inactivate_try);
      if (idx >= 0)
      {
  	/*
  	 * If this try conditional is active and we are before its first
  	 * ":catch", set THROWN so that the ":catch" commands will check
  	 * whether the exception matches.  When the exception came from any of
  	 * the catch clauses, it will be made pending at the ":finally" (if
  	 * present) and rethrown at the ":endtry".  This will also happen if
  	 * the try conditional is inactive.  This is the case when we are
  	 * throwing an exception due to an error or interrupt on the way from
  	 * a preceding ":continue", ":break", ":return", ":finish", error or
  	 * interrupt (not converted to an exception) to the finally clause or
  	 * from a preceding throw of a user or error or interrupt exception to
  	 * the matching catch clause or the finally clause.
  	 */
  	if (!(cstack->cs_flags[idx] & CSF_CAUGHT))
  	{
  	    if (cstack->cs_flags[idx] & CSF_ACTIVE)
  		cstack->cs_flags[idx] |= CSF_THROWN;
  	    else
  		// THROWN may have already been set for a catchable exception
  		// that has been discarded.  Ensure it is reset for the new
  		// exception.
  		cstack->cs_flags[idx] &= ~CSF_THROWN;
  	}
  	cstack->cs_flags[idx] &= ~CSF_ACTIVE;
  	cstack->cs_exception[idx] = current_exception;
      }
  #if 0
      // TODO: Add optimization below.  Not yet done because of interface
      // problems to eval.c and ex_cmds2.c. (Servatius)
      else
      {
  	/*
  	 * There are no catch clauses to check or finally clauses to execute.
  	 * End the current script or function.  The exception will be rethrown
  	 * in the caller.
  	 */
  	if (getline_equal(eap->getline, eap->cookie, get_func_line))
  	    current_funccal->returned = TRUE;
  	elseif (eap->get_func_line == getsourceline)
  	    ((struct source_cookie *)eap->cookie)->finished = TRUE;
      }
  #endif
  
      did_throw = TRUE;
  }
  
  /*
   * ":try"
   */
      void
  ex_try(exarg_T *eap)
  {
      int		skip;
      cstack_T	*cstack = eap->cstack;
  
      if (cstack->cs_idx == CSTACK_LEN - 1)
  	eap->errmsg = N_("E601: :try nesting too deep");
      else
      {
  	++cstack->cs_idx;
  	++cstack->cs_trylevel;
  	cstack->cs_flags[cstack->cs_idx] = CSF_TRY;
  	cstack->cs_pending[cstack->cs_idx] = CSTP_NONE;
  
  	/*
  	 * Don't do something after an error, interrupt, or throw, or when there
  	 * is a surrounding conditional and it was not active.
  	 */
  	skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
  		&& !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE));
  
  	if (!skip)
  	{
  	    // Set ACTIVE and TRUE.  TRUE means that the corresponding ":catch"
  	    // commands should check for a match if an exception is thrown and
  	    // that the finally clause needs to be executed.
  	    cstack->cs_flags[cstack->cs_idx] |= CSF_ACTIVE | CSF_TRUE;
  
  	    /*
  	     * ":silent!", even when used in a try conditional, disables
  	     * displaying of error messages and conversion of errors to
  	     * exceptions.  When the silent commands again open a try
  	     * conditional, save "emsg_silent" and reset it so that errors are
  	     * again converted to exceptions.  The value is restored when that
  	     * try conditional is left.  If it is left normally, the commands
  	     * following the ":endtry" are again silent.  If it is left by
  	     * a ":continue", ":break", ":return", or ":finish", the commands
  	     * executed next are again silent.  If it is left due to an
  	     * aborting error, an interrupt, or an exception, restoring
  	     * "emsg_silent" does not matter since we are already in the
  	     * aborting state and/or the exception has already been thrown.
  	     * The effect is then just freeing the memory that was allocated
  	     * to save the value.
  	     */
  	    if (emsg_silent)
  	    {
  		eslist_T	*elem;
  
  		elem = ALLOC_ONE(struct eslist_elem);
  		if (elem == NULL)
  		    emsg(_(e_outofmem));
  		else
  		{
  		    elem->saved_emsg_silent = emsg_silent;
  		    elem->next = cstack->cs_emsg_silent_list;
  		    cstack->cs_emsg_silent_list = elem;
  		    cstack->cs_flags[cstack->cs_idx] |= CSF_SILENT;
  		    emsg_silent = 0;
  		}
  	    }
  	}
  
      }
  }
  
  /*
   * ":catch /{pattern}/" and ":catch"
   */
      void
  ex_catch(exarg_T *eap)
  {
      int		idx = 0;
      int		give_up = FALSE;
      int		skip = FALSE;
      int		caught = FALSE;
      char_u	*end;
      int		save_char = 0;
      char_u	*save_cpo;
      regmatch_T	regmatch;
      int		prev_got_int;
      cstack_T	*cstack = eap->cstack;
      char_u	*pat;
  
      if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0)
      {
  	eap->errmsg = e_catch;
  	give_up = TRUE;
      }
      else
      {
  	if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY))
  	{
  	    // Report what's missing if the matching ":try" is not in its
  	    // finally clause.
  	    eap->errmsg = get_end_emsg(cstack);
  	    skip = TRUE;
  	}
  	for (idx = cstack->cs_idx; idx > 0; --idx)
  	    if (cstack->cs_flags[idx] & CSF_TRY)
  		break;
  	if (cstack->cs_flags[idx] & CSF_FINALLY)
  	{
  	    // Give up for a ":catch" after ":finally" and ignore it.
  	    // Just parse.
  	    eap->errmsg = N_("E604: :catch after :finally");
  	    give_up = TRUE;
  	}
  	else
  	    rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR,
  						       &cstack->cs_looplevel);
      }
  
      if (ends_excmd2(eap->cmd, eap->arg))   // no argument, catch all errors
      {
  	pat = (char_u *)".*";
  	end = NULL;
  	eap->nextcmd = find_nextcmd(eap->arg);
      }
      else
      {
  	pat = eap->arg + 1;
  	end = skip_regexp_err(pat, *eap->arg, TRUE);
  	if (end == NULL)
  	    give_up = TRUE;
      }
  
      if (!give_up)
      {
  	/*
  	 * Don't do something when no exception has been thrown or when the
  	 * corresponding try block never got active (because of an inactive
  	 * surrounding conditional or after an error or interrupt or throw).
  	 */
  	if (!did_throw || !(cstack->cs_flags[idx] & CSF_TRUE))
  	    skip = TRUE;
  
  	/*
  	 * Check for a match only if an exception is thrown but not caught by
  	 * a previous ":catch".  An exception that has replaced a discarded
  	 * exception is not checked (THROWN is not set then).
  	 */
  	if (!skip && (cstack->cs_flags[idx] & CSF_THROWN)
  		&& !(cstack->cs_flags[idx] & CSF_CAUGHT))
  	{
  	    if (end != NULL && *end != NUL
  				      && !ends_excmd2(end, skipwhite(end + 1)))
  	    {
  		emsg(_(e_trailing));
  		return;
  	    }
  
  	    // When debugging or a breakpoint was encountered, display the
  	    // debug prompt (if not already done) before checking for a match.
  	    // This is a helpful hint for the user when the regular expression
  	    // matching fails.  Handle a ">quit" debug command as if an
  	    // interrupt had occurred before the ":catch".  That is, discard
  	    // the original exception, replace it by an interrupt exception,
  	    // and don't catch it in this try block.
  	    if (!dbg_check_skipped(eap) || !do_intthrow(cstack))
  	    {
  		// Terminate the pattern and avoid the 'l' flag in 'cpoptions'
  		// while compiling it.
  		if (end != NULL)
  		{
  		    save_char = *end;
  		    *end = NUL;
  		}
  		save_cpo  = p_cpo;
  		p_cpo = (char_u *)"";
  		// Disable error messages, it will make current_exception
  		// invalid.
  		++emsg_off;
  		regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
  		--emsg_off;
  		regmatch.rm_ic = FALSE;
  		if (end != NULL)
  		    *end = save_char;
  		p_cpo = save_cpo;
  		if (regmatch.regprog == NULL)
  		    semsg(_(e_invarg2), pat);
  		else
  		{
  		    /*
  		     * Save the value of got_int and reset it.  We don't want
  		     * a previous interruption cancel matching, only hitting
  		     * CTRL-C while matching should abort it.
  		     */
  		    prev_got_int = got_int;
  		    got_int = FALSE;
  		    caught = vim_regexec_nl(&regmatch,
  			       (char_u *)current_exception->value, (colnr_T)0);
  		    got_int |= prev_got_int;
  		    vim_regfree(regmatch.regprog);
  		}
  	    }
  	}
  
  	if (caught)
  	{
  	    // Make this ":catch" clause active and reset did_emsg, got_int,
  	    // and did_throw.  Put the exception on the caught stack.
  	    cstack->cs_flags[idx] |= CSF_ACTIVE | CSF_CAUGHT;
  	    did_emsg = got_int = did_throw = FALSE;
  	    catch_exception((except_T *)cstack->cs_exception[idx]);
  	    // It's mandatory that the current exception is stored in the cstack
  	    // so that it can be discarded at the next ":catch", ":finally", or
  	    // ":endtry" or when the catch clause is left by a ":continue",
  	    // ":break", ":return", ":finish", error, interrupt, or another
  	    // exception.
  	    if (cstack->cs_exception[cstack->cs_idx] != current_exception)
  		internal_error("ex_catch()");
  	}
  	else
  	{
  	    /*
  	     * If there is a preceding catch clause and it caught the exception,
  	     * finish the exception now.  This happens also after errors except
  	     * when this ":catch" was after the ":finally" or not within
  	     * a ":try".  Make the try conditional inactive so that the
  	     * following catch clauses are skipped.  On an error or interrupt
  	     * after the preceding try block or catch clause was left by
  	     * a ":continue", ":break", ":return", or ":finish", discard the
  	     * pending action.
  	     */
  	    cleanup_conditionals(cstack, CSF_TRY, TRUE);
  	}
      }
  
      if (end != NULL)
  	eap->nextcmd = find_nextcmd(end);
  }
  
  /*
   * ":finally"
   */
      void
  ex_finally(exarg_T *eap)
  {
      int		idx;
      int		skip = FALSE;
      int		pending = CSTP_NONE;
      cstack_T	*cstack = eap->cstack;
  
      if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0)
  	eap->errmsg = e_finally;
      else
      {
  	if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY))
  	{
  	    eap->errmsg = get_end_emsg(cstack);
  	    for (idx = cstack->cs_idx - 1; idx > 0; --idx)
  		if (cstack->cs_flags[idx] & CSF_TRY)
  		    break;
  	    // Make this error pending, so that the commands in the following
  	    // finally clause can be executed.  This overrules also a pending
  	    // ":continue", ":break", ":return", or ":finish".
  	    pending = CSTP_ERROR;
  	}
  	else
  	    idx = cstack->cs_idx;
  
  	if (cstack->cs_flags[idx] & CSF_FINALLY)
  	{
  	    // Give up for a multiple ":finally" and ignore it.
  	    eap->errmsg = e_finally_dup;
  	    return;
  	}
  	rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR,
  						       &cstack->cs_looplevel);
  
  	/*
  	 * Don't do something when the corresponding try block never got active
  	 * (because of an inactive surrounding conditional or after an error or
  	 * interrupt or throw) or for a ":finally" without ":try" or a multiple
  	 * ":finally".  After every other error (did_emsg or the conditional
  	 * errors detected above) or after an interrupt (got_int) or an
  	 * exception (did_throw), the finally clause must be executed.
  	 */
  	skip = !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE);
  
  	if (!skip)
  	{
  	    // When debugging or a breakpoint was encountered, display the
  	    // debug prompt (if not already done).  The user then knows that the
  	    // finally clause is executed.
  	    if (dbg_check_skipped(eap))
  	    {
  		// Handle a ">quit" debug command as if an interrupt had
  		// occurred before the ":finally".  That is, discard the
  		// original exception and replace it by an interrupt
  		// exception.
  		(void)do_intthrow(cstack);
  	    }
  
  	    /*
  	     * If there is a preceding catch clause and it caught the exception,
  	     * finish the exception now.  This happens also after errors except
  	     * when this is a multiple ":finally" or one not within a ":try".
  	     * After an error or interrupt, this also discards a pending
  	     * ":continue", ":break", ":finish", or ":return" from the preceding
  	     * try block or catch clause.
  	     */
  	    cleanup_conditionals(cstack, CSF_TRY, FALSE);
  
  	    /*
  	     * Make did_emsg, got_int, did_throw pending.  If set, they overrule
  	     * a pending ":continue", ":break", ":return", or ":finish".  Then
  	     * we have particularly to discard a pending return value (as done
  	     * by the call to cleanup_conditionals() above when did_emsg or
  	     * got_int is set).  The pending values are restored by the
  	     * ":endtry", except if there is a new error, interrupt, exception,
  	     * ":continue", ":break", ":return", or ":finish" in the following
  	     * finally clause.  A missing ":endwhile", ":endfor" or ":endif"
  	     * detected here is treated as if did_emsg and did_throw had
  	     * already been set, respectively in case that the error is not
  	     * converted to an exception, did_throw had already been unset.
  	     * We must not set did_emsg here since that would suppress the
  	     * error message.
  	     */
  	    if (pending == CSTP_ERROR || did_emsg || got_int || did_throw)
  	    {
  		if (cstack->cs_pending[cstack->cs_idx] == CSTP_RETURN)
  		{
  		    report_discard_pending(CSTP_RETURN,
  					   cstack->cs_rettv[cstack->cs_idx]);
  		    discard_pending_return(cstack->cs_rettv[cstack->cs_idx]);
  		}
  		if (pending == CSTP_ERROR && !did_emsg)
  		    pending |= (THROW_ON_ERROR) ? CSTP_THROW : 0;
  		else
  		    pending |= did_throw ? CSTP_THROW : 0;
  		pending |= did_emsg  ? CSTP_ERROR     : 0;
  		pending |= got_int   ? CSTP_INTERRUPT : 0;
  		cstack->cs_pending[cstack->cs_idx] = pending;
  
  		// It's mandatory that the current exception is stored in the
  		// cstack so that it can be rethrown at the ":endtry" or be
  		// discarded if the finally clause is left by a ":continue",
  		// ":break", ":return", ":finish", error, interrupt, or another
  		// exception.  When emsg() is called for a missing ":endif" or
  		// a missing ":endwhile"/":endfor" detected here, the
  		// exception will be discarded.
  		if (did_throw && cstack->cs_exception[cstack->cs_idx]
  							 != current_exception)
  		    internal_error("ex_finally()");
  	    }
  
  	    /*
  	     * Set CSL_HAD_FINA, so do_cmdline() will reset did_emsg,
  	     * got_int, and did_throw and make the finally clause active.
  	     * This will happen after emsg() has been called for a missing
  	     * ":endif" or a missing ":endwhile"/":endfor" detected here, so
  	     * that the following finally clause will be executed even then.
  	     */
  	    cstack->cs_lflags |= CSL_HAD_FINA;
  	}
      }
  }
  
  /*
   * ":endtry"
   */
      void
  ex_endtry(exarg_T *eap)
  {
      int		idx;
      int		skip;
      int		rethrow = FALSE;
      int		pending = CSTP_NONE;
      void	*rettv = NULL;
      cstack_T	*cstack = eap->cstack;
  
      if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0)
  	eap->errmsg = e_no_endtry;
      else
      {
  	/*
  	 * Don't do something after an error, interrupt or throw in the try
  	 * block, catch clause, or finally clause preceding this ":endtry" or
  	 * when an error or interrupt occurred after a ":continue", ":break",
  	 * ":return", or ":finish" in a try block or catch clause preceding this
  	 * ":endtry" or when the try block never got active (because of an
  	 * inactive surrounding conditional or after an error or interrupt or
  	 * throw) or when there is a surrounding conditional and it has been
  	 * made inactive by a ":continue", ":break", ":return", or ":finish" in
  	 * the finally clause.  The latter case need not be tested since then
  	 * anything pending has already been discarded. */
  	skip = did_emsg || got_int || did_throw ||
  	    !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE);
  
  	if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY))
  	{
  	    eap->errmsg = get_end_emsg(cstack);
  	    // Find the matching ":try" and report what's missing.
  	    idx = cstack->cs_idx;
  	    do
  		--idx;
  	    while (idx > 0 && !(cstack->cs_flags[idx] & CSF_TRY));
  	    rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR,
  						       &cstack->cs_looplevel);
  	    skip = TRUE;
  
  	    /*
  	     * If an exception is being thrown, discard it to prevent it from
  	     * being rethrown at the end of this function.  It would be
  	     * discarded by the error message, anyway.  Resets did_throw.
  	     * This does not affect the script termination due to the error
  	     * since "trylevel" is decremented after emsg() has been called.
  	     */
  	    if (did_throw)
  		discard_current_exception();
  	}
  	else
  	{
  	    idx = cstack->cs_idx;
  
  	    /*
  	     * If we stopped with the exception currently being thrown at this
  	     * try conditional since we didn't know that it doesn't have
  	     * a finally clause, we need to rethrow it after closing the try
  	     * conditional.
  	     */
  	    if (did_throw && (cstack->cs_flags[idx] & CSF_TRUE)
  		    && !(cstack->cs_flags[idx] & CSF_FINALLY))
  		rethrow = TRUE;
  	}
  
  	// If there was no finally clause, show the user when debugging or
  	// a breakpoint was encountered that the end of the try conditional has
  	// been reached: display the debug prompt (if not already done).  Do
  	// this on normal control flow or when an exception was thrown, but not
  	// on an interrupt or error not converted to an exception or when
  	// a ":break", ":continue", ":return", or ":finish" is pending.  These
  	// actions are carried out immediately.
  	if ((rethrow || (!skip
  			&& !(cstack->cs_flags[idx] & CSF_FINALLY)
  			&& !cstack->cs_pending[idx]))
  		&& dbg_check_skipped(eap))
  	{
  	    // Handle a ">quit" debug command as if an interrupt had occurred
  	    // before the ":endtry".  That is, throw an interrupt exception and
  	    // set "skip" and "rethrow".
  	    if (got_int)
  	    {
  		skip = TRUE;
  		(void)do_intthrow(cstack);
  		// The do_intthrow() call may have reset did_throw or
  		// cstack->cs_pending[idx].
  		rethrow = FALSE;
  		if (did_throw && !(cstack->cs_flags[idx] & CSF_FINALLY))
  		    rethrow = TRUE;
  	    }
  	}
  
  	/*
  	 * If a ":return" is pending, we need to resume it after closing the
  	 * try conditional; remember the return value.  If there was a finally
  	 * clause making an exception pending, we need to rethrow it.  Make it
  	 * the exception currently being thrown.
  	 */
  	if (!skip)
  	{
  	    pending = cstack->cs_pending[idx];
  	    cstack->cs_pending[idx] = CSTP_NONE;
  	    if (pending == CSTP_RETURN)
  		rettv = cstack->cs_rettv[idx];
  	    else if (pending & CSTP_THROW)
  		current_exception = cstack->cs_exception[idx];
  	}
  
  	/*
  	 * Discard anything pending on an error, interrupt, or throw in the
  	 * finally clause.  If there was no ":finally", discard a pending
  	 * ":continue", ":break", ":return", or ":finish" if an error or
  	 * interrupt occurred afterwards, but before the ":endtry" was reached.
  	 * If an exception was caught by the last of the catch clauses and there
  	 * was no finally clause, finish the exception now.  This happens also
  	 * after errors except when this ":endtry" is not within a ":try".
  	 * Restore "emsg_silent" if it has been reset by this try conditional.
  	 */
  	(void)cleanup_conditionals(cstack, CSF_TRY | CSF_SILENT, TRUE);
  
  	--cstack->cs_idx;
  	--cstack->cs_trylevel;
  
  	if (!skip)
  	{
  	    report_resume_pending(pending,
  		    (pending == CSTP_RETURN) ? rettv :
  		    (pending & CSTP_THROW) ? (void *)current_exception : NULL);
  	    switch (pending)
  	    {
  		case CSTP_NONE:
  		    break;
  
  		// Reactivate a pending ":continue", ":break", ":return",
  		// ":finish" from the try block or a catch clause of this try
  		// conditional.  This is skipped, if there was an error in an
  		// (unskipped) conditional command or an interrupt afterwards
  		// or if the finally clause is present and executed a new error,
  		// interrupt, throw, ":continue", ":break", ":return", or
  		// ":finish".
  		case CSTP_CONTINUE:
  		    ex_continue(eap);
  		    break;
  		case CSTP_BREAK:
  		    ex_break(eap);
  		    break;
  		case CSTP_RETURN:
  		    do_return(eap, FALSE, FALSE, rettv);
  		    break;
  		case CSTP_FINISH:
  		    do_finish(eap, FALSE);
  		    break;
  
  		// When the finally clause was entered due to an error,
  		// interrupt or throw (as opposed to a ":continue", ":break",
  		// ":return", or ":finish"), restore the pending values of
  		// did_emsg, got_int, and did_throw.  This is skipped, if there
  		// was a new error, interrupt, throw, ":continue", ":break",
  		// ":return", or ":finish".  in the finally clause.
  		default:
  		    if (pending & CSTP_ERROR)
  			did_emsg = TRUE;
  		    if (pending & CSTP_INTERRUPT)
  			got_int = TRUE;
  		    if (pending & CSTP_THROW)
  			rethrow = TRUE;
  		    break;
  	    }
  	}
  
  	if (rethrow)
  	    // Rethrow the current exception (within this cstack).
  	    do_throw(cstack);
      }
  }
  
  /*
   * enter_cleanup() and leave_cleanup()
   *
   * Functions to be called before/after invoking a sequence of autocommands for
   * cleanup for a failed command.  (Failure means here that a call to emsg()
   * has been made, an interrupt occurred, or there is an uncaught exception
   * from a previous autocommand execution of the same command.)
   *
   * Call enter_cleanup() with a pointer to a cleanup_T and pass the same
   * pointer to leave_cleanup().  The cleanup_T structure stores the pending
   * error/interrupt/exception state.
   */
  
  /*
   * This function works a bit like ex_finally() except that there was not
   * actually an extra try block around the part that failed and an error or
   * interrupt has not (yet) been converted to an exception.  This function
   * saves the error/interrupt/ exception state and prepares for the call to
   * do_cmdline() that is going to be made for the cleanup autocommand
   * execution.
   */
      void
  enter_cleanup(cleanup_T *csp)
  {
      int		pending = CSTP_NONE;
  
      /*
       * Postpone did_emsg, got_int, did_throw.  The pending values will be
       * restored by leave_cleanup() except if there was an aborting error,
       * interrupt, or uncaught exception after this function ends.
       */
      if (did_emsg || got_int || did_throw || need_rethrow)
      {
  	csp->pending = (did_emsg     ? CSTP_ERROR     : 0)
  		     | (got_int      ? CSTP_INTERRUPT : 0)
  		     | (did_throw    ? CSTP_THROW     : 0)
  		     | (need_rethrow ? CSTP_THROW     : 0);
  
  	// If we are currently throwing an exception (did_throw), save it as
  	// well.  On an error not yet converted to an exception, update
  	// "force_abort" and reset "cause_abort" (as do_errthrow() would do).
  	// This is needed for the do_cmdline() call that is going to be made
  	// for autocommand execution.  We need not save *msg_list because
  	// there is an extra instance for every call of do_cmdline(), anyway.
  	if (did_throw || need_rethrow)
  	{
  	    csp->exception = current_exception;
  	    current_exception = NULL;
  	}
  	else
  	{
  	    csp->exception = NULL;
  	    if (did_emsg)
  	    {
  		force_abort |= cause_abort;
  		cause_abort = FALSE;
  	    }
  	}
  	did_emsg = got_int = did_throw = need_rethrow = FALSE;
  
  	// Report if required by the 'verbose' option or when debugging.
  	report_make_pending(pending, csp->exception);
      }
      else
      {
  	csp->pending = CSTP_NONE;
  	csp->exception = NULL;
      }
  }
  
  /*
   * See comment above enter_cleanup() for how this function is used.
   *
   * This function is a bit like ex_endtry() except that there was not actually
   * an extra try block around the part that failed and an error or interrupt
   * had not (yet) been converted to an exception when the cleanup autocommand
   * sequence was invoked.
   *
   * This function has to be called with the address of the cleanup_T structure
   * filled by enter_cleanup() as an argument; it restores the error/interrupt/
   * exception state saved by that function - except there was an aborting
   * error, an interrupt or an uncaught exception during execution of the
   * cleanup autocommands.  In the latter case, the saved error/interrupt/
   * exception state is discarded.
   */
      void
  leave_cleanup(cleanup_T *csp)
  {
      int		pending = csp->pending;
  
      if (pending == CSTP_NONE)	// nothing to do
  	return;
  
      // If there was an aborting error, an interrupt, or an uncaught exception
      // after the corresponding call to enter_cleanup(), discard what has been
      // made pending by it.  Report this to the user if required by the
      // 'verbose' option or when debugging.
      if (aborting() || need_rethrow)
      {
  	if (pending & CSTP_THROW)
  	    // Cancel the pending exception (includes report).
  	    discard_exception((except_T *)csp->exception, FALSE);
  	else
  	    report_discard_pending(pending, NULL);
  
  	// If an error was about to be converted to an exception when
  	// enter_cleanup() was called, free the message list.
  	if (msg_list != NULL)
  	    free_global_msglist();
      }
  
      /*
       * If there was no new error, interrupt, or throw between the calls
       * to enter_cleanup() and leave_cleanup(), restore the pending
       * error/interrupt/exception state.
       */
      else
      {
  	/*
  	 * If there was an exception being thrown when enter_cleanup() was
  	 * called, we need to rethrow it.  Make it the exception currently
  	 * being thrown.
  	 */
  	if (pending & CSTP_THROW)
  	    current_exception = csp->exception;
  
  	/*
  	 * If an error was about to be converted to an exception when
  	 * enter_cleanup() was called, let "cause_abort" take the part of
  	 * "force_abort" (as done by cause_errthrow()).
  	 */
  	else if (pending & CSTP_ERROR)
  	{
  	    cause_abort = force_abort;
  	    force_abort = FALSE;
  	}
  
  	/*
  	 * Restore the pending values of did_emsg, got_int, and did_throw.
  	 */
  	if (pending & CSTP_ERROR)
  	    did_emsg = TRUE;
  	if (pending & CSTP_INTERRUPT)
  	    got_int = TRUE;
  	if (pending & CSTP_THROW)
  	    need_rethrow = TRUE;    // did_throw will be set by do_one_cmd()
  
  	// Report if required by the 'verbose' option or when debugging.
  	report_resume_pending(pending,
  		   (pending & CSTP_THROW) ? (void *)current_exception : NULL);
      }
  }
  
  
  /*
   * Make conditionals inactive and discard what's pending in finally clauses
   * until the conditional type searched for or a try conditional not in its
   * finally clause is reached.  If this is in an active catch clause, finish
   * the caught exception.
   * Return the cstack index where the search stopped.
   * Values used for "searched_cond" are (CSF_WHILE | CSF_FOR) or CSF_TRY or 0,
   * the latter meaning the innermost try conditional not in its finally clause.
   * "inclusive" tells whether the conditional searched for should be made
   * inactive itself (a try conditional not in its finally clause possibly find
   * before is always made inactive).  If "inclusive" is TRUE and
   * "searched_cond" is CSF_TRY|CSF_SILENT, the saved former value of
   * "emsg_silent", if reset when the try conditional finally reached was
   * entered, is restored (used by ex_endtry()).  This is normally done only
   * when such a try conditional is left.
   */
      int
  cleanup_conditionals(
      cstack_T   *cstack,
      int		searched_cond,
      int		inclusive)
  {
      int		idx;
      int		stop = FALSE;
  
      for (idx = cstack->cs_idx; idx >= 0; --idx)
      {
  	if (cstack->cs_flags[idx] & CSF_TRY)
  	{
  	    /*
  	     * Discard anything pending in a finally clause and continue the
  	     * search.  There may also be a pending ":continue", ":break",
  	     * ":return", or ":finish" before the finally clause.  We must not
  	     * discard it, unless an error or interrupt occurred afterwards.
  	     */
  	    if (did_emsg || got_int || (cstack->cs_flags[idx] & CSF_FINALLY))
  	    {
  		switch (cstack->cs_pending[idx])
  		{
  		    case CSTP_NONE:
  			break;
  
  		    case CSTP_CONTINUE:
  		    case CSTP_BREAK:
  		    case CSTP_FINISH:
  			report_discard_pending(cstack->cs_pending[idx], NULL);
  			cstack->cs_pending[idx] = CSTP_NONE;
  			break;
  
  		    case CSTP_RETURN:
  			report_discard_pending(CSTP_RETURN,
  						      cstack->cs_rettv[idx]);
  			discard_pending_return(cstack->cs_rettv[idx]);
  			cstack->cs_pending[idx] = CSTP_NONE;
  			break;
  
  		    default:
  			if (cstack->cs_flags[idx] & CSF_FINALLY)
  			{
  			    if (cstack->cs_pending[idx] & CSTP_THROW)
  			    {
  				// Cancel the pending exception.  This is in the
  				// finally clause, so that the stack of the
  				// caught exceptions is not involved.
  				discard_exception((except_T *)
  					cstack->cs_exception[idx],
  					FALSE);
  			    }
  			    else
  				report_discard_pending(cstack->cs_pending[idx],
  					NULL);
  			    cstack->cs_pending[idx] = CSTP_NONE;
  			}
  			break;
  		}
  	    }
  
  	    /*
  	     * Stop at a try conditional not in its finally clause.  If this try
  	     * conditional is in an active catch clause, finish the caught
  	     * exception.
  	     */
  	    if (!(cstack->cs_flags[idx] & CSF_FINALLY))
  	    {
  		if ((cstack->cs_flags[idx] & CSF_ACTIVE)
  			&& (cstack->cs_flags[idx] & CSF_CAUGHT))
  		    finish_exception((except_T *)cstack->cs_exception[idx]);
  		// Stop at this try conditional - except the try block never
  		// got active (because of an inactive surrounding conditional
  		// or when the ":try" appeared after an error or interrupt or
  		// throw).
  		if (cstack->cs_flags[idx] & CSF_TRUE)
  		{
  		    if (searched_cond == 0 && !inclusive)
  			break;
  		    stop = TRUE;
  		}
  	    }
  	}
  
  	// Stop on the searched conditional type (even when the surrounding
  	// conditional is not active or something has been made pending).
  	// If "inclusive" is TRUE and "searched_cond" is CSF_TRY|CSF_SILENT,
  	// check first whether "emsg_silent" needs to be restored.
  	if (cstack->cs_flags[idx] & searched_cond)
  	{
  	    if (!inclusive)
  		break;
  	    stop = TRUE;
  	}
  	cstack->cs_flags[idx] &= ~CSF_ACTIVE;
  	if (stop && searched_cond != (CSF_TRY | CSF_SILENT))
  	    break;
  
  	/*
  	 * When leaving a try conditional that reset "emsg_silent" on its
  	 * entry after saving the original value, restore that value here and
  	 * free the memory used to store it.
  	 */
  	if ((cstack->cs_flags[idx] & CSF_TRY)
  		&& (cstack->cs_flags[idx] & CSF_SILENT))
  	{
  	    eslist_T	*elem;
  
  	    elem = cstack->cs_emsg_silent_list;
  	    cstack->cs_emsg_silent_list = elem->next;
  	    emsg_silent = elem->saved_emsg_silent;
  	    vim_free(elem);
  	    cstack->cs_flags[idx] &= ~CSF_SILENT;
  	}
  	if (stop)
  	    break;
      }
      return idx;
  }
  
  /*
   * Return an appropriate error message for a missing endwhile/endfor/endif.
   */
     static char *
  get_end_emsg(cstack_T *cstack)
  {
      if (cstack->cs_flags[cstack->cs_idx] & CSF_WHILE)
  	return e_endwhile;
      if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR)
  	return e_endfor;
      return e_endif;
  }
  
  
  /*
   * Rewind conditionals until index "idx" is reached.  "cond_type" and
   * "cond_level" specify a conditional type and the address of a level variable
   * which is to be decremented with each skipped conditional of the specified
   * type.
   * Also free "for info" structures where needed.
   */
      void
  rewind_conditionals(
      cstack_T   *cstack,
      int		idx,
      int		cond_type,
      int		*cond_level)
  {
      while (cstack->cs_idx > idx)
      {
  	if (cstack->cs_flags[cstack->cs_idx] & cond_type)
  	    --*cond_level;
  	if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR)
  	    free_for_info(cstack->cs_forinfo[cstack->cs_idx]);
  	--cstack->cs_idx;
      }
  }
  
  /*
   * ":endfunction" when not after a ":function"
   */
      void
  ex_endfunction(exarg_T *eap)
  {
      if (eap->cmdidx == CMD_enddef)
  	emsg(_("E193: :enddef not inside a function"));
      else
  	emsg(_("E193: :endfunction not inside a function"));
  }
  
  /*
   * Return TRUE if the string "p" looks like a ":while" or ":for" command.
   */
      int
  has_loop_cmd(char_u *p)
  {
      int		len;
  
      // skip modifiers, white space and ':'
      for (;;)
      {
  	while (*p == ' ' || *p == '\t' || *p == ':')
  	    ++p;
  	len = modifier_len(p);
  	if (len == 0)
  	    break;
  	p += len;
      }
      if ((p[0] == 'w' && p[1] == 'h')
  	    || (p[0] == 'f' && p[1] == 'o' && p[2] == 'r'))
  	return TRUE;
      return FALSE;
  }
  
  #endif // FEAT_EVAL
  