From ba9146c16bc6a7f3539e4cef5f5a9a8207de66ad Mon Sep 17 00:00:00 2001
From: Jason Merrill <jason@redhat.com>
Date: Mon, 11 Feb 2013 10:47:46 -0500
Subject: [PATCH] re PR c++/56268 (C++11 ICE with boost multi-precision and
 boost variant during assignment)

	PR c++/56268
	* semantics.c (classtype_has_nothrow_assign_or_copy_p): Call
	maybe_instantiate_noexcept.

From-SVN: r195943
---
 gcc/cp/ChangeLog                              |  4 ++++
 gcc/cp/semantics.c                            |  1 +
 gcc/testsuite/g++.dg/ext/has_nothrow_copy-8.C | 19 +++++++++++++++++++
 3 files changed, 24 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/ext/has_nothrow_copy-8.C

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index c1fc4bc..6172db6 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,5 +1,9 @@
 2013-02-09  Jason Merrill  <jason@redhat.com>
 
+	PR c++/56268
+	* semantics.c (classtype_has_nothrow_assign_or_copy_p): Call
+	maybe_instantiate_noexcept.
+
 	PR c++/56247
 	* pt.c (eq_specializations): Set comparing_specializations.
 	* tree.c (cp_tree_equal): Check it.
diff --git a/gcc/cp/semantics.c b/gcc/cp/semantics.c
index f8b37c1..e3dea09 100644
--- a/gcc/cp/semantics.c
+++ b/gcc/cp/semantics.c
@@ -5413,6 +5413,7 @@ classtype_has_nothrow_assign_or_copy_p (tree type, bool assign_p)
       else if (copy_fn_p (fn) <= 0)
 	continue;
 
+      maybe_instantiate_noexcept (fn);
       if (!TYPE_NOTHROW_P (TREE_TYPE (fn)))
 	return false;
     }
diff --git a/gcc/testsuite/g++.dg/ext/has_nothrow_copy-8.C b/gcc/testsuite/g++.dg/ext/has_nothrow_copy-8.C
new file mode 100644
index 0000000..e1be1a0
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/has_nothrow_copy-8.C
@@ -0,0 +1,19 @@
+// PR c++/56268
+// { dg-options -std=c++11 }
+
+template <class T>
+struct A {
+  A(const A&) noexcept (T::value);
+};
+
+struct B {
+  static const bool value = true;
+};
+
+template <class T>
+struct C {
+  static const bool value = __has_nothrow_copy (T);
+};
+
+#define SA(X) static_assert((X),#X)
+SA(C<A<B>>::value);
-- 
2.7.4