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27 Commits

Author SHA1 Message Date
Eric Fiselier
cae4caba73 Move __lazy_* metafunctions to type traits and add tests 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@246408 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-08-31 03:50:31 +00:00
Eric Fiselier
8e706d2c3e [libcxx] Move tuple_size and tuple_element overloads for pair and array out of !defined(_LIBCPP_HAS_NO_VARIADICS) block. 
Summary:
There is no reason to guard `tuple_size`, `tuple_element` and `get<I>(...)` for pair and array inside of `<__tuple>` so that they are only available when we have variadic templates.
This requires there be redundant declarations and definitions. It also makes it easy to get things wrong.

For example the following code should compile (and does in c++11).
```
#define _LIBCPP_HAS_NO_VARIADICS
#include <array>

int main()
{
  static_assert((std::tuple_size<std::array<int, 10> volatile>::value == 10), "");
}
```

This patch lifts the non-variadic parts of `tuple_size`, `tuple_types`, and `get<I>(...)` to the top of `<__tuple>` where they don't require variadic templates. This patch also removes `<__tuple_03>` because there is no longer a need for it.


Reviewers: danalbert, K-ballo, mclow.lists

Reviewed By: mclow.lists

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D7774

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@232492 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-03-17 15:08:03 +00:00
Eric Fiselier
522aaf67ea [libcxx] Delay evaluation of __make_tuple_types to prevent blowing the max template instantiation depth. Fixes Bug #18345 
Summary:
http://llvm.org/bugs/show_bug.cgi?id=18345

Tuple's constructor and assignment operators for "tuple-like" types evaluates __make_tuple_types unnecessarily. In the case of a large array this can blow the template instantiation depth.

Ex:
```
#include <array>
#include <tuple>
#include <memory>
 
typedef std::array<int, 1256> array_t;
typedef std::tuple<array_t> tuple_t;

int main() {
  array_t a;
  tuple_t t(a); // broken
  t = a; // broken

  // make_shared uses tuple behind the scenes. This bug breaks this code.
  std::make_shared<array_t>(a);
}
```

To prevent this from happening we delay the instantiation of `__make_tuple_types` until after we perform the length check. Currently `__make_tuple_types` is instantiated at the same time that the length check .


Test Plan: Two tests have been added. One for the "tuple-like" constructors and another for the "tuple-like" assignment operator. 

Reviewers: mclow.lists, EricWF

Reviewed By: EricWF

Subscribers: K-ballo, cfe-commits

Differential Revision: http://reviews.llvm.org/D4467

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@220769 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-10-28 06:31:22 +00:00
Eric Fiselier
9020c08989 D4451: Fix copy/move issues casude by __tuple_leafs's converting constructor 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@213888 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-07-24 18:48:34 +00:00
Howard Hinnant
0f678bd69e Nico Rieck: this patch series fixes visibility issues on Windows as explained in <http://lists.cs.uiuc.edu/pipermail/cfe-dev/2013-August/031214.html>. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@188192 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-08-12 18:38:34 +00:00
Marshall Clow
8fc4f5a251 Make std::get constexpr 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@186525 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-07-17 18:25:36 +00:00
Howard Hinnant
83eade6abb No functionality change at this time. I've split _LIBCPP_VISIBLE up into two flags: _LIBCPP_TYPE_VIS and _LIBCPP_FUNC_VIS. This is in preparation for taking advantage of clang's new __type_visibility__ attribute. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@176593 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-03-06 23:30:19 +00:00
Howard Hinnant
33be35effe Dimitry Andric: many visibility fixes. Howard: Much appreciated. Can you send me a patch to CREDITS.TXT? 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@163862 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-09-14 00:39:16 +00:00
Howard Hinnant
dc1345fd44 I believe tuple is still under development in the standard. Daniel Krugler is/will be making convincing arguments that a modified form of LWG 2051 (currently NAD Future) is easily acheivable and desirable. He has demonstrated that a tuple<T...> where all of the T are implicitly convertible from U... should have a tuple constructor that is also implicit, instead of explicit. This would support the use cases in LWG 2051 while not undermining T... with explicit conversions from U.... This check-in is an experimental implementation of Daniel's work. I believe this work to be mature enough to warrant inclusion into libc++. If anyone sees real-world problems that this check in causes, please let me know and I will revert it, and provide the feedback to the LWG. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@153855 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-04-01 23:10:42 +00:00
Howard Hinnant
ec3773c2da Quash a whole bunch of warnings 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@145624 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-12-01 20:21:04 +00:00
Howard Hinnant
08e17472e4 Windows support by Ruben Van Boxem. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@142235 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-17 20:05:10 +00:00
Howard Hinnant
74248888ab Changed constraints on pair and tuple constructors from is_convertible to is_constructible. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@134252 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-01 20:12:51 +00:00
Howard Hinnant
f0562af9dd noexcept for <array>. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@132359 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-31 21:06:33 +00:00
Howard Hinnant
a5e0121b8d noexcept for <tuple>. And in the process learned that I had done it wrong for pair's swap. I needed to create an __is_nothrow_swappable<T>::value trait that was smart enought to answer false when __is_swappable<T>::value is false. Otherwise one gets compile-time errors when using pair or tuple of non-swappable types, even if you never try to swap the pair or tuple. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@132204 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-27 19:08:18 +00:00
Howard Hinnant
f9b8998795 I have to revert this recent fix to tuple conversions until clang implements cwg 1170. Without this fix pair and tuple don't convert properly. With it, associative containers get access errors when they shouldn't. cwg 1170 fixes the latter. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@127411 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-03-10 17:27:30 +00:00
Howard Hinnant
fddf722f4e Chris Jefferson found this bug to pair/tuple introduced by a recent change to the draft that I missed. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@126743 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-03-01 14:27:55 +00:00
Howard Hinnant
f83417b823 Chandler Carruth changed >> to > > in several places. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@124120 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-24 16:07:25 +00:00
Howard Hinnant
0e1493ec5e LWG 1385 [FCD] tuple_cat should be a single variadic signature (http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-active.html#1385). This issue is only in Ready status, meaning it is not official, but probably will be this March in Madrid. It was tentatively accepted in Batavia with the previso that Bill and I didn't have any problems implementing it. This is my part of that agreement. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@121619 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-11 20:47:50 +00:00
Howard Hinnant
f048fe3a09 N3123 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@119906 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-20 18:25:22 +00:00
Howard Hinnant
cd2254b454 LWG 1191 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@119545 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-17 19:52:17 +00:00
Howard Hinnant
86ed8aefb2 LWG 1118 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@119541 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-17 19:22:43 +00:00
Howard Hinnant
b64f8b07c1 license change 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@119395 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-16 22:09:02 +00:00
Howard Hinnant
e049cc5f75 Cleaning up some tuple code. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@114848 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-09-27 17:54:17 +00:00
Howard Hinnant
333f50d30c visibility-decoration. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@114470 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-09-21 20:16:37 +00:00
Howard Hinnant
324bb03bb9 Fixing whitespace problems 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@111750 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-22 00:02:43 +00:00
Howard Hinnant
f5256e16df Wiped out some non-ascii characters that snuck into the copyright. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103516 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-11 21:36:01 +00:00
Howard Hinnant
bc8d3f97eb libcxx initial import 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103490 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-11 19:42:16 +00:00