From: Jason Merrill <jason@redhat.com>
Date: Mon, 4 Aug 2008 18:39:16 +0000 (-0400)
Subject: re PR c++/37006 (explicitly deleted inline function gives warning "used but never... 
X-Git-Tag: releases/gcc-4.4.0~3394
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9b26c96e339b9e546ffe5ac2a114af397bf4cd17;p=thirdparty%2Fgcc.git

re PR c++/37006 (explicitly deleted inline function gives warning "used but never defined")

        PR c++/37006
        * pt.c (tsubst_decl): Leave DECL_INITIAL set on deleted
        instantiations.

From-SVN: r138648
---

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index c40b9894e435..1918189a11b5 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2008-08-04  Jason Merrill  <jason@redhat.com>
+
+	PR c++/37006
+	* pt.c (tsubst_decl): Leave DECL_INITIAL set on deleted
+	instantiations.
+
 2008-08-04  Simon Baldwin  <simonb@google.com>
 
 	PR c++/36999
diff --git a/gcc/cp/pt.c b/gcc/cp/pt.c
index 04fd29bb0092..6e4f0ba447b3 100644
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -8143,7 +8143,9 @@ tsubst_decl (tree t, tree args, tsubst_flags_t complain)
 	/* Clear out the mangled name and RTL for the instantiation.  */
 	SET_DECL_ASSEMBLER_NAME (r, NULL_TREE);
 	SET_DECL_RTL (r, NULL_RTX);
-	DECL_INITIAL (r) = NULL_TREE;
+	/* Leave DECL_INITIAL set on deleted instantiations.  */
+	if (!DECL_DELETED_FN (r))
+	  DECL_INITIAL (r) = NULL_TREE;
 	DECL_CONTEXT (r) = ctx;
 
 	if (member && DECL_CONV_FN_P (r))
diff --git a/gcc/testsuite/g++.dg/cpp0x/defaulted3.C b/gcc/testsuite/g++.dg/cpp0x/defaulted3.C
new file mode 100644
index 000000000000..efde415936d3
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/defaulted3.C
@@ -0,0 +1,16 @@
+// PR c++/37006
+// { dg-options "-std=c++0x" }
+
+template<class T>
+struct A {
+  template<class U>
+  bool operator==(const A<U>&) = delete; // { dg-error "deleted function" }
+  operator bool () { return true; }
+};
+
+int main()
+{
+  A<int> a1;
+  A<void> a2;
+  if(a1 == a2) {}		// { dg-error "used here" }
+}