From 6fddc80c956401dc47fcdced80fd31e6c46a4af2 Mon Sep 17 00:00:00 2001
From: eidheim <eidheim@gmail.com>
Date: Mon, 6 Jun 2016 20:50:10 +0200
Subject: [PATCH] source_spellcheck: fixed lambda support for signals on older
 platforms

---
 src/source_spellcheck.cc | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/source_spellcheck.cc b/src/source_spellcheck.cc
index f27c38c..26a20fd 100644
--- a/src/source_spellcheck.cc
+++ b/src/source_spellcheck.cc
@@ -2,6 +2,20 @@
 #include "config.h"
 #include <iostream>
 
+namespace sigc {
+#ifndef SIGC_FUNCTORS_DEDUCE_RESULT_TYPE_WITH_DECLTYPE
+  template <typename Functor>
+  struct functor_trait<Functor, false> {
+    typedef decltype (::sigc::mem_fun(std::declval<Functor&>(),
+                                      &Functor::operator())) _intermediate;
+    typedef typename _intermediate::result_type result_type;
+    typedef Functor functor_type;
+  };
+#else
+  SIGC_FUNCTORS_DEDUCE_RESULT_TYPE_WITH_DECLTYPE
+#endif
+}
+
 AspellConfig* Source::SpellCheckView::spellcheck_config=NULL;
 
 Source::SpellCheckView::SpellCheckView() : Gsv::View() {