From: David Kastrup <dak@gnu.org>
Date: Fri, 12 Jun 2015 15:34:17 +0000 (+0200)
Subject: smobs.hh: mention that GUILE 1 gives callable structs at most 3 args
X-Git-Tag: release/2.19.22-1~53
X-Git-Url: https://git.donarmstrong.com/?a=commitdiff_plain;h=5c63a28bd87431364a78d7bfcfaf4482a78d3f67;p=lilypond.git

smobs.hh: mention that GUILE 1 gives callable structs at most 3 args
---

diff --git a/lily/include/smobs.hh b/lily/include/smobs.hh
index e95637cb7c..3bcec9931e 100644
--- a/lily/include/smobs.hh
+++ b/lily/include/smobs.hh
@@ -213,7 +213,12 @@ private:
   }
 
   // Well, function template argument packs are a C++11 feature.  So
-  // we just define a bunch of trampolines manually.
+  // we just define a bunch of trampolines manually.  It turns out
+  // that GUILE 1.8.8 cannot actually make callable structures with
+  // more than 3 arguments anyway.  That's surprising, to say the
+  // least, but in emergency situations one can always use a "rest"
+  // argument and take it apart manually.
+
   template <SCM (Super::*pmf)(void)>
   static SCM smob_trampoline (SCM self)
   {