Implement the roff(7) .as request (append to user-defined string).

Missing feature found by jca@ in ratpoison(1).
The ratpoison(1) manual still doesn't work because it uses .shift
and .while, too (apparently, ratpoison is so complex that it
needs a Turing-complete language to even format its manual :-).

Written at Christchurch International Airport.

3 files changed, 31 insertions, 2 deletions

diff --git a/regress/usr.bin/mandoc/roff/ds/Makefile b/regress/usr.bin/mandoc/roff/ds/Makefile
index 1d0dd711842..79ac4eee1f9 100644
--- a/regress/usr.bin/mandoc/roff/ds/Makefile
+++ b/regress/usr.bin/mandoc/roff/ds/Makefile
@@ -1,5 +1,5 @@
-# $OpenBSD: Makefile,v 1.2 2011/11/17 16:28:46 schwarze Exp $
+# $OpenBSD: Makefile,v 1.3 2014/02/14 23:05:08 schwarze Exp $
 
-REGRESS_TARGETS=quoting
+REGRESS_TARGETS = quoting append
 
 .include <bsd.regress.mk>
diff --git a/regress/usr.bin/mandoc/roff/ds/append.in b/regress/usr.bin/mandoc/roff/ds/append.in
new file mode 100644
index 00000000000..6efa46bacca
--- /dev/null
+++ b/regress/usr.bin/mandoc/roff/ds/append.in
@@ -0,0 +1,17 @@
+.Dd February 4, 2014
+.Dt DS-APPEND 1
+.Os OpenBSD
+.Sh NAME
+.Nm ds-append
+.Nd appending to user-defined strings
+.Sh DESCRIPTION
+.ds foo first part
+first part: \*[foo]
+.br
+.as foo " second part
+with second part: \*[foo]
+.br
+.as foo " third part
+with third part: \*[foo]
+.br
+end of test document
diff --git a/regress/usr.bin/mandoc/roff/ds/append.out_ascii b/regress/usr.bin/mandoc/roff/ds/append.out_ascii
new file mode 100644
index 00000000000..d186f7672c0
--- /dev/null
+++ b/regress/usr.bin/mandoc/roff/ds/append.out_ascii
@@ -0,0 +1,12 @@
+DS-APPEND(1)               OpenBSD Reference Manual               DS-APPEND(1)
+
+NNAAMMEE
+     ddss--aappppeenndd - appending to user-defined strings
+
+DDEESSCCRRIIPPTTIIOONN
+     first part: first part
+     with second part: first part second part
+     with third part: first part second part third part
+     end of test document
+
+OpenBSD                        February 4, 2014                        OpenBSD