From a99c9a30e9f41eb3ce553ac0b2ac6ff963ebe49d Mon Sep 17 00:00:00 2001
From: Ingo Schwarze <schwarze@openbsd.org>
Date: Thu, 23 Aug 2018 14:29:38 +0000
Subject: 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().
---
 regress/roff/shift/basic.out_ascii | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 regress/roff/shift/basic.out_ascii

(limited to 'regress/roff/shift/basic.out_ascii')

diff --git a/regress/roff/shift/basic.out_ascii b/regress/roff/shift/basic.out_ascii
new file mode 100644
index 00000000..40675c67
--- /dev/null
+++ b/regress/roff/shift/basic.out_ascii
@@ -0,0 +1,25 @@
+SHIFT_BASIC(1)              General Commands Manual             SHIFT_BASIC(1)
+
+
+
+NNAAMMEE
+       sshhiifftt--bbaassiicc - the shift request
+
+DDEESSCCRRIIPPTTIIOONN
+       original arguments: oonnee_t_w_otthhrreeee_f_o_u_rffiivvee
+
+       after shift 2: tthhrreeee_f_o_u_rffiivvee
+
+       after shift without argument: ffoouurr_f_i_v_e
+
+       after shift 0: ffoouurr_f_i_v_e
+
+       expand to less than three bytes: <1>
+
+       expand to exactly three bytes: <x y>
+
+       expand to more than three bytes: <a longer argument... and another>
+
+
+
+OpenBSD                         August 23, 2018                 SHIFT_BASIC(1)
-- 
cgit