implement the roff(7) d (macro or string defined) conditional

3 files changed, 50 insertions, 1 deletions

diff --git a/regress/roff/cond/Makefile b/regress/roff/cond/Makefile
index 68a88694..65d7be52 100644
--- a/regress/roff/cond/Makefile
+++ b/regress/roff/cond/Makefile
@@ -1,6 +1,6 @@
 # $OpenBSD: Makefile,v 1.8 2015/05/31 23:12:17 schwarze Exp $
 
-REGRESS_TARGETS = if ie close numeric register strcmp before-Dd
+REGRESS_TARGETS	= if ie close numeric register strcmp string before-Dd
 LINT_TARGETS	= if close
 
 .include <bsd.regress.mk>
diff --git a/regress/roff/cond/string.in b/regress/roff/cond/string.in
new file mode 100644
index 00000000..6d19f4ce
--- /dev/null
+++ b/regress/roff/cond/string.in
@@ -0,0 +1,29 @@
+.TH STRING 1 "June 14, 2017" OpenBSD
+.SH NAME
+string \- conditional testing whether a string is defined
+.SH DESCRIPTION
+.ie d mystr OOPS
+.el mystr not yet defined
+.br
+.ds mystr mystrval
+.ie d mystr now defined
+.el OOPS
+.if !d mystr OOPS
+.PP
+.ie d mymac OOPS
+.el mymac not yet defined
+.br
+.de mymac
+mymacval
+..
+.ie dmymac now defined
+.el OOPS
+.if !d  mymac OOPS
+.PP
+.ie d myren OOPS
+.el myren not yet defined
+.br
+.rn SM myren
+.ie d myren now defined
+.el OOPS
+.if !d myren OOPS
diff --git a/regress/roff/cond/string.out_ascii b/regress/roff/cond/string.out_ascii
new file mode 100644
index 00000000..8df491ac
--- /dev/null
+++ b/regress/roff/cond/string.out_ascii
@@ -0,0 +1,20 @@
+STRING(1)                   General Commands Manual                  STRING(1)
+
+
+
+NNAAMMEE
+       string - conditional testing whether a string is defined
+
+DDEESSCCRRIIPPTTIIOONN
+       mystr not yet defined
+       now defined
+
+       mymac not yet defined
+       now defined
+
+       myren not yet defined
+       now defined
+
+
+
+OpenBSD                          June 14, 2017                       STRING(1)