blob: bc6524cabb9efe16cbb3283912428d4145e64846 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
Upstream-Status: Inappropriate [Backport]
From 4af193055b0dcc204387ba06e11a053c5b55ad15 Mon Sep 17 00:00:00 2001
From: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 29 Mar 2011 18:47:47 +0000
Subject: [PATCH 038/200] PR c++/48319
* pt.c (value_dependent_expression_p): Handle TEMPLATE_ID_EXPR.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_6-branch@171688 138bc75d-0d04-0410-961f-82ee72b054a4
index d649628..da9365f 100644
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -18220,6 +18220,11 @@ value_dependent_expression_p (tree expression)
return false;
}
+ case TEMPLATE_ID_EXPR:
+ /* If a TEMPLATE_ID_EXPR involves a dependent name, it will be
+ type-dependent. */
+ return type_dependent_expression_p (expression);
+
default:
/* A constant expression is value-dependent if any subexpression is
value-dependent. */
new file mode 100644
index 0000000..1ceeeaf
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/dependent1.C
@@ -0,0 +1,25 @@
+// PR c++/48319
+// { dg-options -std=c++0x }
+// We were failing to recognize declval<_Args1> as dependent.
+
+template<typename Tp> Tp declval() noexcept;
+
+template<typename _Tp>
+class __is_constructible_helper
+{
+ typedef char __one;
+ typedef struct { char __arr[2]; } __two;
+
+ template<typename _Tp1, typename... _Args1>
+ static decltype(_Tp1(declval<_Args1>()...), __one()) __test(int);
+
+ template<typename, typename...>
+ static __two __test(...);
+
+public:
+ static const bool __value = sizeof(__test<_Tp>(0)) == 1;
+};
+
+int main() {
+ return __is_constructible_helper<int>::__value;
+}
--
1.7.0.4
|
