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-rw-r--r--gcc/cp/ChangeLog3
-rw-r--r--gcc/cp/constexpr.c4
-rw-r--r--gcc/testsuite/g++.dg/cpp0x/constexpr-complex2.C5
3 files changed, 10 insertions, 2 deletions
diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 60186ee..b2195e4 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,5 +1,8 @@
2016-11-12 Jason Merrill <jason@redhat.com>
+ * constexpr.c (potential_constant_expression_1): REALPART_EXPR and
+ IMAGPART_EXPR can be lvalues.
+
DR 374
PR c++/56840
* pt.c (check_specialization_namespace): Allow any enclosing
diff --git a/gcc/cp/constexpr.c b/gcc/cp/constexpr.c
index f75f0b0..739e902 100644
--- a/gcc/cp/constexpr.c
+++ b/gcc/cp/constexpr.c
@@ -5105,6 +5105,8 @@ potential_constant_expression_1 (tree t, bool want_rval, bool strict,
#endif
return RECUR (t, any);
+ case REALPART_EXPR:
+ case IMAGPART_EXPR:
case COMPONENT_REF:
case BIT_FIELD_REF:
case ARROW_EXPR:
@@ -5276,8 +5278,6 @@ potential_constant_expression_1 (tree t, bool want_rval, bool strict,
return true;
/* fall through. */
- case REALPART_EXPR:
- case IMAGPART_EXPR:
case CONJ_EXPR:
case SAVE_EXPR:
case FIX_TRUNC_EXPR:
diff --git a/gcc/testsuite/g++.dg/cpp0x/constexpr-complex2.C b/gcc/testsuite/g++.dg/cpp0x/constexpr-complex2.C
new file mode 100644
index 0000000..9a9291b
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/constexpr-complex2.C
@@ -0,0 +1,5 @@
+// { dg-do compile { target c++11 } }
+// { dg-options "" }
+
+static _Complex int i;
+static_assert (&__imag i == &__imag i, "");