C++ PATCH for c++/61242 (nested list-init)

[Jason Merrill]

We were getting confused by applying LOOKUP_NO_TEMP_BIND to the nested 
list-initializations, which is wrong; in aggregate initialization the 
elements are copy-initialized without regard to the enclosing context.

Tested x86_64-pc-linux-gnu, applying to trunk.
commit 916172d3d6e115b94f1a902aebca444a61ca04ae
Author: Jason Merrill <ja...@redhat.com>
Date:   Tue May 27 16:35:07 2014 -0400
    	PR c++/61242
    	* call.c (build_aggr_conv): Ignore passed in flags.
    	(build_array_conv, build_complex_conv): Likewise.

diff --git a/gcc/cp/call.c b/gcc/cp/call.c
index 20af0e3..77aa8ca 100644
--- a/gcc/cp/call.c
+++ b/gcc/cp/call.c
@@ -890,7 +890,9 @@ build_aggr_conv (tree type, tree ctor, int flags, tsubst_flags_t complain)
   if (ctor == error_mark_node)
     return NULL;
 
-  flags |= LOOKUP_NO_NARROWING;
+  /* The conversions within the init-list aren't affected by the enclosing
+     context; they're always simple copy-initialization.  */
+  flags = LOOKUP_IMPLICIT|LOOKUP_NO_NARROWING;
 
   for (; field; field = next_initializable_field (DECL_CHAIN (field)))
     {
@@ -963,6 +965,8 @@ build_array_conv (tree type, tree ctor, int flags, tsubst_flags_t complain)
 	return NULL;
     }
 
+  flags = LOOKUP_IMPLICIT|LOOKUP_NO_NARROWING;
+
   FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (ctor), i, val)
     {
       conversion *sub
@@ -1007,6 +1011,8 @@ build_complex_conv (tree type, tree ctor, int flags,
   if (len != 2)
     return NULL;
 
+  flags = LOOKUP_IMPLICIT|LOOKUP_NO_NARROWING;
+
   FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (ctor), i, val)
     {
       conversion *sub
diff --git a/gcc/testsuite/g++.dg/cpp0x/initlist84.C b/gcc/testsuite/g++.dg/cpp0x/initlist84.C
new file mode 100644
index 0000000..4d46746
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/initlist84.C
@@ -0,0 +1,17 @@
+// PR c++/61242
+// { dg-do compile { target c++11 } }
+
+struct Foo
+{
+  struct A
+  {
+    const int &container;
+    const int &args;
+  };
+  static void Create (const A &);
+};
+
+int main ()
+{
+  Foo::Create ({{}, {}});
+}