re PR c++/70229 (error: constexpr constructor does not have empty body)

PR c++/70229
	* constexpr.c (check_constexpr_ctor_body_1): Allow typedef
	declarations.

	* g++.dg/cpp0x/constexpr-ctor19.C: New test.

From-SVN: r239115

gcc/cp/ChangeLog

@@ -1,3 +1,9 @@
+2016-08-04  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/70229
+	* constexpr.c (check_constexpr_ctor_body_1): Allow typedef
+	declarations.
+
 2016-08-01  Jason Merrill  <jason@redhat.com>
 
 	* mangle.c (mangle_decl): Warn about mangled name change even if

gcc/cp/constexpr.c

@@ -425,7 +425,8 @@ check_constexpr_ctor_body_1 (tree last, tree list)
   switch (TREE_CODE (list))
     {
     case DECL_EXPR:
-      if (TREE_CODE (DECL_EXPR_DECL (list)) == USING_DECL)
+      if (TREE_CODE (DECL_EXPR_DECL (list)) == USING_DECL
+	  || TREE_CODE (DECL_EXPR_DECL (list)) == TYPE_DECL)
 	return true;
       return false;
 

gcc/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2016-08-04  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/70229
+	* g++.dg/cpp0x/constexpr-ctor19.C: New test.
+
 2016-08-04  Richard Biener  <rguenther@suse.de>
 
 	PR middle-end/71984

gcc/testsuite/g++.dg/cpp0x/constexpr-ctor19.C

@@ -0,0 +1,42 @@
+// PR c++/70229
+// { dg-do compile { target c++11 } }
+
+template <class>
+class S {
+  constexpr S (void) {
+    typedef int T;
+  }
+};
+
+template <class>
+class S2 {
+  constexpr S2 (void) {
+    ;
+  }
+};
+
+template <class>
+class S3 {
+  constexpr S3 (void) {
+    typedef enum { X } E;
+  } // { dg-error "does not have empty body" "" { target c++11_only } }
+};
+
+template <class>
+class S4 {
+  constexpr S4 (void) {
+    typedef struct { int j; } U;
+  } // { dg-error "does not have empty body" "" { target c++11_only } }
+};
+
+struct V
+{
+  int i;
+};
+
+template <class>
+class S5 {
+  constexpr S5 (void) {
+    typedef V W;
+  }
+};