===================================================================
RCS file: /cvs/mandoc/TODO,v
retrieving revision 1.287
retrieving revision 1.294
diff -u -p -r1.287 -r1.294
--- mandoc/TODO	2019/03/04 11:37:30	1.287
+++ mandoc/TODO	2019/05/03 17:31:15	1.294
@@ -1,6 +1,6 @@
 ************************************************************************
 * Official mandoc TODO.
-* $Id: TODO,v 1.287 2019/03/04 11:37:30 schwarze Exp $
+* $Id: TODO,v 1.294 2019/05/03 17:31:15 schwarze Exp $
 ************************************************************************
 
 Many issues are annotated for difficulty as follows:
@@ -62,6 +62,27 @@ are mere guesses, and some may be wrong.
   needed for Tcl_NewStringObj(3) via wiz@  Wed, 5 Mar 2014 22:27:43 +0100
   loc **  exist ***  algo ***  size *  imp ***
 
+- .als only works for macros in mandoc, not for user-defined strings.
+  Also, the "val" field in struct roffkv would have to be replaced
+  with a pointer to a reference-counted wrapper, and an alias
+  would have to point to the same wrapper as the original.
+  .als to undefined does nothing; the alias is not created.
+  .rm'ing the original leaves the alias to point to the old value.
+  .de .als .de changes both, but
+  .de .als .rm .de only changes the new value, not the alias.
+  Found in groffer(1) version 1.19
+  Jan Stary 20 Apr 2019 20:16:54 +0200
+  loc *  exist **  algo **  size **  imp *
+
+- roff string condition comparisons fail when vars contain quotes:
+  .ds s '
+  .if '\*s'' \&...
+  hard to fix because of the basic architecture (string replacement
+  happens before roff(7) syntax parsing)
+  Found in groffer(1) version 1.19
+  Jan Stary 20 Apr 2019 20:16:54 +0200
+  loc *  exist ***  algo ***  size **  imp *
+
 --- missing mdoc features ----------------------------------------------
 
 - .Bl -column .Xo support is missing
@@ -446,15 +467,6 @@ are mere guesses, and some may be wrong.
 * warning issues
 ************************************************************************
 
-- When a man(1) command returns no result and there was an -S
-  argument, check the -S argument against the list of valid
-  architectures and say "Unknown architecture AAA" rather than
-  "No entry for NNN in the manual" if there is no match.
-  Requires moving the lists of valid architectures out of
-  mdoc_validate.c such that they can be used by main.c.
-  Discussed with jmc@ 10 Aug 2018 19:20:12 +0100.
-  loc **  exist *  algo *  size *  imp **
-
 - warn about duplicate .Sh/.Ss heads
   gre(4): Rename duplicate sections 20 Apr 2018 15:27:33 +0200
   loc *  exist *  algo *  size *  imp **
@@ -522,10 +534,6 @@ are mere guesses, and some may be wrong.
   See the file test-PATH_MAX.c for details.
   Found by Aaron M. Ucko in the GNU Hurd via Bdale Garbee,
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=829624
-
-- We use the input line number at several places to distinguish
-  same-line from different-line input.  That plainly doesn't work
-  with user-defined macros, leading to random breakage.
 
 - Is it possible to further simplify ENDBODY_SPACE?