[PATCH] D supports the #line directive, so use it.

[H. S. Teoh]

Note, however, that it does *not* support trailing comments after
the #line directive, so suppress that.
---
 data/skeletons/d.m4 | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/data/skeletons/d.m4 b/data/skeletons/d.m4
index 946f0135..26460ca8 100644
--- a/data/skeletons/d.m4
+++ b/data/skeletons/d.m4
@@ -160,6 +160,14 @@ b4_symbol_foreach([b4_token_enum])
 }
 ])
 
+# b4_sync_start(LINE, FILE)
+# -------------------------
+m4_define([b4_sync_start], [[#]line $1 $2])
+
+# b4_sync_end(LINE, FILE)
+# -----------------------
+m4_define([b4_sync_end])
+
 # b4-case(ID, CODE)
 # -----------------
 m4_define([b4_case], [    case $1:
-- 
2.20.1