Re: Semantics of compctl -X

[Zoltan Hidvegi <hzoli@xxxxxxxxxx>]

> It seems that the behaviour of -X "Explanation" compctl flag has changed
> since 2.5.03.  It used to work like this:
> 
> compctl -X "Testing" howdy
> howdy <tab>
> 
> - would give :  "Testing"
> 
> Now, in Zsh3, however, it appears to *not* echo anything unless it's got
> something to complete.

It broke long ago when Zefram reorganized zle_tricky a bit.  It is
surprising that nobody noticed this since than.  The patch below should fix
it.  I'm not 100% confident that this is the right way to fix it so any
better solutions are welcome.

Zoltan


*** Src/zle_tricky.c	1996/08/11 19:15:35	2.72
--- Src/zle_tricky.c	1996/08/23 17:40:00
***************
*** 2136,2145 ****
  		strcpy((char *)line + wb, (char *)line + we);
  		we = cs = wb;
  	    }
! 	    if (nmatches>1)
  		/* There are more than one match. */
  		do_ambiguous();
! 	    else {
  		/* Only one match. */
  		do_single(amatches[0]);
  		invalidatelist();
--- 2136,2145 ----
  		strcpy((char *)line + wb, (char *)line + we);
  		we = cs = wb;
  	    }
! 	    if (nmatches > 1)
  		/* There are more than one match. */
  		do_ambiguous();
! 	    else if (nmatches == 1) {
  		/* Only one match. */
  		do_single(amatches[0]);
  		invalidatelist();
***************
*** 2147,2155 ****
  	}
  
  	/* Print the explanation string if needed. */
! 	if (!showinglist && expl && nmatches!=1) {
  	    int up;
  
  	    trashzle();
  
  	    clearflag = (isset(USEZLE) && termok &&
--- 2147,2156 ----
  	}
  
  	/* Print the explanation string if needed. */
! 	if (!showinglist && expl && !nmatches) {
  	    int up;
  
+ 	    feep();
  	    trashzle();
  
  	    clearflag = (isset(USEZLE) && termok &&
***************
*** 2953,2959 ****
      ccsuffix = cc->suffix;
  
      validlist = 1;
!     if(nmatches && !errflag)
  	return 0;
  
      if ((isf || cc->xor) && !parampre) {
--- 2954,2960 ----
      ccsuffix = cc->suffix;
  
      validlist = 1;
!     if ((nmatches || expl) && !errflag)
  	return 0;
  
      if ((isf || cc->xor) && !parampre) {