Implement the roff(7) .shift and .return requests,

for example used by groff_hdtbl(7) and groff_mom(7).

Also correctly interpolate arguments during nested macro execution
even after .shift and .return, implemented using a stack of argument
arrays.

Note that only read.c, but not roff.c can detect the end of a macro
execution, and the existence of .shift implies that arguments cannot
be interpolated up front, so unfortunately, this includes a partial
revert of roff.c rev. 1.337, moving argument interpolation back into
the function roff_res().

1 files changed, 1 insertions, 1 deletions

diff --git a/TODO b/TODO
index efd11431..7ed27cc0 100644
--- a/TODO
+++ b/TODO
@@ -57,7 +57,7 @@ are mere guesses, and some may be wrong.
   reported by brad@  Sat, 15 Jan 2011 15:45:23 -0500
   loc ***  exist ***  algo ***  size **  imp *
 
-- .while and .shift
+- .while
   found by jca@ in ratpoison(1)  Sun, 30 Jun 2013 12:01:09 +0200
   loc *  exist **  algo **  size **  imp **