commit 4fa8b843cddb10d5421e48a5a52408e83e352da3
author Brad Bishop <bradleyb@fuzziesquirrel.com> Wed Nov 21 08:09:28 2018 -0500
committer Ed Tanous <ed.tanous@intel.com> Fri Nov 30 18:58:32 2018 +0000
tree 76c64c2fe6c2d38b839a1b03215f2a6ef6b4864f
parent 5f7d88c43ca389d0f053e0ce1aa3f3fc70f5f712

crow: work around gcc bug 87513

| In file included from src/webserver_main.cpp:1:
| crow/include/crow/app.h: In instantiation of ...blah blah blah
| src/webserver_main.cpp:110:1:   required from here
| crow/include/crow/app.h:61:10: internal compiler error: in write_expression, at cp/mangle.c:3050
|      auto route(std::string&& rule) -> typename std::result_of<
|           ^~~~~
| Please submit a full bug report,

We lose c++11 compatibility.  ¯\_(ツ)_/¯

Change-Id: Ie30805a88355be0c7adb7b70234989a16b4f1b45
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>

crow/include/crow/app.h

diff --git a/crow/include/crow/app.h b/crow/include/crow/app.h
index 7051ec8..c919245 100644
--- a/crow/include/crow/app.h
+++ b/crow/include/crow/app.h
@@ -57,9 +57,7 @@
         return router.newRuleDynamic(rule);
     }
 
-    template <uint64_t Tag>
-    auto route(std::string&& rule) -> typename std::result_of<
-        decltype (&Router::newRuleTagged<Tag>)(Router, std::string&&)>::type
+    template <uint64_t Tag> auto& route(std::string&& rule)
     {
         return router.newRuleTagged<Tag>(std::move(rule));
     }