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Author SHA1 Message Date
Marshall Clow 4703f76376 Update synposis in <memory> to show move semantics for weak_ptr; add tests for already existing move semantics. Mark LWG issues #2315 (no changes needed), 2316 (move semantics for weak_ptr), 2252 (previous commit) and 2271 (previous commit) as complete. 
llvm-svn: 202931
 2014-03-05 03:12:04 +00:00
Marshall Clow 7f10fc480a LWG Issue #2271: regex_traits::lookup_classname specification unclear. libc++ already does the right thing; just update the tests. 
llvm-svn: 202904
 2014-03-04 22:44:34 +00:00
Marshall Clow d9e7cf3efd LWG issue #2252: Add more tests for exception safety. No changes needed in the library 
llvm-svn: 202885
 2014-03-04 20:31:21 +00:00
Marshall Clow 7493a29398 Fix issue number error; 2141 --> 2291 and mark it as complete 
llvm-svn: 202884
 2014-03-04 20:29:09 +00:00
Marshall Clow 5d658fbbdf Add a SG1 paper and some SG1 issues that affect the library to the task list. 
llvm-svn: 202881
 2014-03-04 19:40:36 +00:00
Marshall Clow 85a15f067e Apply David Majnemer's patch updating the links to the papers from Chicago and Issaquah. 
llvm-svn: 202878
 2014-03-04 19:22:53 +00:00
Marshall Clow 53ec054da4 Mark issues #2240 (wording only) and #2268 (revision 202876) as complete. 
llvm-svn: 202877
 2014-03-04 19:18:36 +00:00
Marshall Clow 53b88dad6f Implement LWG #2268: Setting a default argument in the declaration of a member function assign of std::basic_string. 
llvm-svn: 202876
 2014-03-04 19:17:19 +00:00
Peter Collingbourne 99aadbdb7d [libc++] Const qualify __gnu_cxx::hash_map<>::const_iterator::pointer type. 
Differential Revision: http://llvm-reviews.chandlerc.com/D2811

llvm-svn: 202749
 2014-03-03 19:50:01 +00:00
Marshall Clow f519be343b Implement LWG 2324: Insert iterator constructors should use addressof(). Add two new container classes to the test suite that overload operator &, and add test cases to the insert/front_insert/back_insert iterator tests that use these containers. 
llvm-svn: 202741
 2014-03-03 19:20:40 +00:00
Marshall Clow c451b43607 Remove a stray tab that snuck into a test. No functionality change 
llvm-svn: 202739
 2014-03-03 19:16:40 +00:00
Marshall Clow 05c8dad230 Implement LWG Paper n3887: Consistent Metafunction Aliases. This adds std::tuple_element_t<> as an alias for tuple_element<>::type. Clean up the synopsis for tuple_element in <utility> as well. 
llvm-svn: 202673
 2014-03-03 06:18:11 +00:00
Marshall Clow 06965c1fd0 Per N3924, mark random_shuffle as deprecated in the synopsis for <algorithm>. Since we don't actually do anything when a call is deprecated, there is no functionality change. Maybe someday, we'll decide to warn when using a deprecated function. 
llvm-svn: 202672
 2014-03-03 06:14:19 +00:00
Marshall Clow 6a640a18a4 Implement LWG Issue #2285 - make_reverse_iterator. Also mark issues #1450 and #2205 as complete; they are just wording changes in the standard. Mark issues #2359, #2320 and #2322 as complete - libc++ implements them already. 
llvm-svn: 202671
 2014-03-03 01:24:04 +00:00
Marshall Clow 4ab4534964 More LWG issues. Mark #2182, #2323 and #2213 as complete. Add a test for #2339, and mark that as complete. No actual changes to the libc++ code; all of these were already in place. 
llvm-svn: 202407
 2014-02-27 16:13:36 +00:00
Marshall Clow c204c130fa LWG issue #2188: Reverse iterator does not fully support targets that overload operator&. Also mark #2272 and #2299 as complete; libc++ already implements them. 
llvm-svn: 202339
 2014-02-27 02:11:50 +00:00
Bob Wilson fa5da05c86 Don't install CMakeLists.txt along with the headers. 
llvm-svn: 202280
 2014-02-26 17:14:09 +00:00
Marshall Clow 16da324051 Implement LWG issue 2306: match_results::reference should be value_type&, not const value_type&. This is a general move by the LWG to have the reference type of read-only containers be a non-const reference; however, there are no methods that return a non-const reference to a match_result entry, so there's no worries about getting a non-const reference to a constant object. 
llvm-svn: 202214
 2014-02-26 01:56:31 +00:00
Marshall Clow 11918cff19 Mark LWG issue 2299 as complete. No code changes; libc++ already implements this. 
llvm-svn: 202203
 2014-02-25 23:11:19 +00:00
Marshall Clow 4da015b9b4 Mark LWG Issue 2257 as complete. 
llvm-svn: 202162
 2014-02-25 16:35:39 +00:00
Marshall Clow f433d63439 Mark LWG Issues 2278 and 2313 as complete. No code changes needed; libc++ already implemented both of these. 
llvm-svn: 202161
 2014-02-25 16:25:55 +00:00
Marshall Clow 0d1560e10e Implement LWG issue 2301: Mark std::tie as constexpr 
llvm-svn: 202158
 2014-02-25 16:11:46 +00:00
Marshall Clow 31be78b27d Fix historical #ifdef. Use __cplusplus instead of __GXX_EXPERIMENTAL_CXX0X__ when compiling with clang. No functionality change. Noteto self: It is important to run the regression tests on the copy of the code that you've changed. 
llvm-svn: 201938
 2014-02-22 15:13:48 +00:00
Juergen Ributzka 88ec12cd76 Revert "Fix historical #ifdef. Use __cplusplus instead of __GXX_EXPERIMENTAL_CXX0X__ when compiling with clang. No functionality change." 
This reverts commit r201864, because it breaks our build bots.

llvm-svn: 201892
 2014-02-21 21:06:36 +00:00
Marshall Clow 0e23e04f9a Fix historical #ifdef. Use __cplusplus instead of __GXX_EXPERIMENTAL_CXX0X__ when compiling with clang. No functionality change. 
llvm-svn: 201864
 2014-02-21 18:07:52 +00:00
Yaron Keren 7b89f9958f Solve the errors 
Error 1 error C2681: 'add_rvalue_reference<_Tp*>::type' : invalid expression
type for dynamic_cast c:\libcxx\include\type_traits

This is one more step getting libcxx compile under Visual C++. The patch is 
#if defined(_LIBCPP_MSVC) so will affect only this build.

When libcxx can be compiled, it will probably require the current version or
maybe even the next Update of Visual C++ 2013.

Patch by G M!

llvm-svn: 201844
 2014-02-21 10:00:31 +00:00
Chandler Carruth 265b83a87f Teach libc++ to use the compiler-provided C-compatible ::max_align_t 
rather than its own type for std::max_align_t. This is particularly
relevant as the types may not be ABI compatible despite users expecting
them to be.

llvm-svn: 201843
 2014-02-21 08:37:30 +00:00
Marshall Clow 7d35711187 Implement LWG Issues #2329 and #2332 - disallow iterators into temporary regexes and regexes into temporary strings 
llvm-svn: 201717
 2014-02-19 21:21:11 +00:00
Marshall Clow 962003126f Mark issues 2280, 2258, 2304, 2317, 2350 and 2346 as completed. 
llvm-svn: 201704
 2014-02-19 17:55:46 +00:00
Marshall Clow 6c3f5ffbb8 Implement LWG Issue: 2280. begin/end for arrays should be constexpr and noexcept, plus a drive-by fix for cbegin/cend suggested by Peter Sommerlad. 
llvm-svn: 201703
 2014-02-19 17:53:30 +00:00
Marshall Clow 9d67c6d5fd Implement LWG2350: min, max, and minmax should be constexpr. 
llvm-svn: 201697
 2014-02-19 16:51:35 +00:00
Marshall Clow 551365da33 Implement LWG Issue 2346: integral_constant's member functions should be marked noexcept 
llvm-svn: 201534
 2014-02-17 22:18:51 +00:00
Marshall Clow 53d8b20078 Remove tabs that crept in during an earlier refactoring. No functionality change 
llvm-svn: 201472
 2014-02-16 01:57:26 +00:00
Marshall Clow b1ad26901f Mark issue 2293, 2241 and 2308 as complete 
llvm-svn: 201460
 2014-02-15 05:41:48 +00:00
Marshall Clow bacc03ef8d First pass at the Issaquah issues list 
llvm-svn: 201459
 2014-02-15 05:10:39 +00:00
Marshall Clow cdf2fae610 Add a test to make sure that vector supports incomplete types 
llvm-svn: 201349
 2014-02-13 17:56:12 +00:00
Yaron Keren 3ef24c4f9a This solves warning C4005: '_NOEXCEPT' : macro redefinition when compiling 
with Visual C++ 2013 by making libcxx definition text-identical to yvals.h.

Persumably this definition is for older Visual C++ versions. 
In such cases it will still be defined so no functionality change.

Other platforms should not be affected as this is inside
#elif defined(_LIBCPP_MSVC)

Patch by G M!

llvm-svn: 201328
 2014-02-13 14:02:28 +00:00
Marshall Clow 5bd869490b Fix for PR17606 - result_of (and INVOKE) works incorrectly for member function pointers with ref qualifiers. Also a drive-by fix for common_type in C++03 mode. Thanks to Michel Morin for the bug report and the proposed fix. 
llvm-svn: 201101
 2014-02-10 17:40:28 +00:00
Marshall Clow 74cf6ff5e5 Fix for PR18735 - self-assignment for map/multimap gives incorrect results in C++03 
llvm-svn: 201021
 2014-02-08 04:03:14 +00:00
Joerg Sonnenberger a0a143690d Avoid signed vs unsigned compare warnings. From Dimitry Andric. 
llvm-svn: 200993
 2014-02-07 21:14:29 +00:00
Peter Collingbourne 09df4a6675 Support forward_list<Incomplete Type>. Patch by Zhihao Yuan! 
llvm-svn: 200814
 2014-02-05 01:44:17 +00:00
Howard Hinnant 7fe6441cc3 Albert Wong: Fix thread.thread.id/lt.pass.cpp to not assume thread::id() produces a minimal value. This enables this test to pass on andriod arm. 
llvm-svn: 200793
 2014-02-04 19:51:48 +00:00
Marshall Clow 0c8bb8f0f2 Fix numeric.limits.members/traps.pass.cpp to pass on non-x86 architectures. Fixes bug #18468 
llvm-svn: 200724
 2014-02-03 23:26:56 +00:00
Logan Chien 22747e621e Remove default function template argument from the header. 
GCC will treat the default function template arguments as a
compilation error if C++0x is not enabled.

This commit workaround the compilation error by moving the
SFINAE check to function argument instead of the template
argument.

llvm-svn: 200523
 2014-01-31 09:30:46 +00:00
David Fang 7584238232 lit.site.cfg:cxx_under_test should take precedence over 'which clang++' 
(reviewed by Marshall Clow)

llvm-svn: 200364
 2014-01-29 01:54:52 +00:00
Marshall Clow 30f1883eee Removed extra line that I left in when committing 199694. Thanks to Jared Grubb for the catch. 
llvm-svn: 200108
 2014-01-26 01:59:59 +00:00
Marshall Clow f246033698 Rename some internal templates to avoid conflict with complier intrinsics. __is_constructible --> __libcpp_is_constructible, __is_nothrow_constructible --> __libcpp_is_nothrow_constructible, and __is_nothrow_assignable --> __libcpp_is_nothrow_assignable. No functionality change. 
llvm-svn: 200010
 2014-01-24 15:27:41 +00:00
Peter Collingbourne a5adf489b7 Const qualify __mem_fn call operator 
QOI improvement.

Differential Revision: http://llvm-reviews.chandlerc.com/D2059

llvm-svn: 199848
 2014-01-22 22:56:52 +00:00
Marshall Clow d724d60fff Removed extra space; thanks to thakis_'s eagle eye 
llvm-svn: 199695
 2014-01-21 00:03:44 +00:00
Marshall Clow 683268b2d8 Fixed test failure in is_iec559.pass.cpp on darwin-ppc32. Thanks to David Fang for the report (and suggested fix) 
llvm-svn: 199694
 2014-01-20 23:57:16 +00:00
Marshall Clow 7132122196 Fix erroneous test; was failing on darwin-ppc32. Fixes PR18469. 
llvm-svn: 199542
 2014-01-18 03:41:54 +00:00
Marshall Clow 9aafa898f9 Update __parse_DUP_COUNT and __parse_BACKREF to use the traits class to recognize digits. Fixes PR18514 
llvm-svn: 199541
 2014-01-18 03:40:03 +00:00
Alp Toker 5fea974b6b Adjust build fix from r199494 to use C++ casts 
Change suggested by Joerg Sonnenberger!

llvm-svn: 199500
 2014-01-17 16:17:24 +00:00
Alp Toker 0b438a9f63 Build fix for gcc builtin 
The __sync_add_and_fetch() builtin parameter is volatile but clang has
'different' type checking and ends up accepting this code.

Undo the C++ cast from r198505 to get libc++/LLVM building with g++ while this
is investigated.

llvm-svn: 199494
 2014-01-17 14:24:23 +00:00
Marshall Clow 354d39cabc Add license headers to a bunch of libc++ files that were missing them. No functionality change. Fixes 18291. Thanks to Nico for the bug report and the patch. 
llvm-svn: 199400
 2014-01-16 16:58:45 +00:00
Marshall Clow 9f4be3fa4f Apply patch for Albert Wong: 'Modify testit to allow filtering tests by prefixes'. 
llvm-svn: 199318
 2014-01-15 16:28:42 +00:00
Marshall Clow b183f8594f Whoops! Set the default in the last commit to c++1y instead of c++11 
llvm-svn: 199224
 2014-01-14 17:04:06 +00:00
Marshall Clow 4cdc6feb4f Update lib/buildit and test/testit to both pay attention to an env flag CXX_LANG, which people can set to 'c++03', 'c++11' or 'c++1y' to build/test using that language variant. If you don't set this env variable, you get c++11, just like today. Drive-by fix; remove duplicate -nostdinc++. 
llvm-svn: 199222
 2014-01-14 17:00:40 +00:00
Marshall Clow ec931c0721 Rename libc++ internal templates __is_void, __is_integral, __is_floating_point, __is_pointer, __is_function_imp, __is_function, __is_member_function_pointer, __is_member_pointer, __is_signed_impl, __is_signed, __is_unsigned_impl, __is_unsigned to __libcpp_is_XXX, because some compilers have decided that __is_XXX are keywords. No functionality change. 
llvm-svn: 199184
 2014-01-14 05:13:45 +00:00
Marshall Clow 54f6bd59f5 Fix a bug in regex_token_iterator's copy constructor. Caught by Bob Wilson. 
llvm-svn: 199122
 2014-01-13 17:47:08 +00:00
Marshall Clow 79b0fee3c6 Fix PR18404 - 'Bug in regex_token_iterator::operator++(int) implementation'. Enhance the tests for regex_token_iterator and regex_iterator. 
llvm-svn: 198878
 2014-01-09 18:25:57 +00:00
Joerg Sonnenberger 70d4ba7f19 Replace casts of __impl_ with the correct reinterpret_cast of the 
address. Restores the assembly of before r198504.

llvm-svn: 198698
 2014-01-07 19:21:13 +00:00
Marshall Clow a429ba738c Back out the <type_traits> changes from r198431; they were breaking when building with glibc. Need to find a better solution for PR18218. 
llvm-svn: 198623
 2014-01-06 18:12:50 +00:00
Marshall Clow a889636aa0 Removed extra trailing underscore in #ifdef (__GNUC___ --> __GNUC__ ) 
llvm-svn: 198618
 2014-01-06 15:23:02 +00:00
Marshall Clow a3e6e2b286 Rename several internal templates to get rid of ___ (triple underscores) or worse, four. No functionality change. 
llvm-svn: 198608
 2014-01-06 14:00:09 +00:00
Joerg Sonnenberger 634b9dd768 Switch to using C++ style casts. 
llvm-svn: 198505
 2014-01-04 17:43:00 +00:00
Yaron Keren acb42aefd7 80 cols fixes. 
llvm-svn: 198482
 2014-01-04 09:27:39 +00:00
Yaron Keren f8f56755e0 Implement the functions: clz, clzl, clzll, ctz, ctzl, and ctzll 
for libcxx when compiled with Visual C++ on Win32 and Win64.

clang and gcc (MinGW) compilers provide these implementations themselves.

llvm-svn: 198481
 2014-01-04 08:56:00 +00:00
Marshall Clow 0724bf6767 Rename ___make_pair_return to __make_pair_return_impl; ___make_tuple_return to __make_tuple_return_impl; and ____iterator_traits to __iterator_traits_impl. Part of a campaign to remove > 2 underscores from libc++. No functionality change. 
llvm-svn: 198457
 2014-01-03 22:55:49 +00:00
Marshall Clow d41295da72 Patch by Howard. First part of fix for PR18218; add type traits needed to do the right thing. Fix the problems in PR18218 for isnan and pow - they also need to be applied to the other functions in <cmath>. Also, a drive-by fix for the test - now actually calls test_abs() 
llvm-svn: 198431
 2014-01-03 18:21:14 +00:00
NAKAMURA Takumi d40d387fb1 Update the copyright credits -- Happy new year 2014! 
FIXME: Dragonegg may be updated at non-trivial changes.
llvm-svn: 198274
 2014-01-01 08:27:31 +00:00
Marshall Clow ce81aed463 Make cv_status a class enum. Fixes PR18314. Thanks to Andersca for the report and the patch. 
llvm-svn: 197921
 2013-12-23 22:14:27 +00:00
Yaron Keren 21a697b8b1 Empty line between two unrelated #ifdefs. 
llvm-svn: 197810
 2013-12-20 13:19:45 +00:00
Logan Chien b0d5be563b Fix GCC unknown pragma warning in libc++. 
We should check defined(__clang__) before the usage of the
clang diagnostic pragmas.

The [-Wswitch] warning in src/future.cpp should be ignored.
As the result, the equivalent GCC pragma is added.

llvm-svn: 197314
 2013-12-14 06:45:09 +00:00
Logan Chien ca83921ddc GCC does not support strong enum in pre-C++0x mode. 
GCC does not support strong enum if -std=c++0x is not used.
Without the strong enum, we will see following error:

  In file included from libcxx/include/ostream:131:0,
                   from libcxx/include/sstream:174,
                   from libcxx/include/complex:247,
                   from cpp03-headers.cpp:11:
  libcxx/include/ios:419:68: error: 'io_errc' is not a class or namespace
  libcxx/include/ios:420:66: error: 'io_errc' is not a class or namespace

To workaround this issue, this commit will define
_LIBCPP_HAS_NO_STRONG_ENUMS when we are compiling with
g++ without c++0x.

llvm-svn: 197313
 2013-12-14 06:44:09 +00:00
Marshall Clow c66a611b27 Move std::begin(array) and std::end(array) out from under an #ifdef that was preventing people from building libc++ using gcc. This corrects a mistake that I introduced in r196058 
llvm-svn: 197061
 2013-12-11 19:32:32 +00:00
Marshall Clow 6bc32ebf35 Refactored a bunch of duplicated code in <ostream>. Made a new routine called __put_character_sequence, and made nine places call it. 
llvm-svn: 196951
 2013-12-10 19:25:49 +00:00
Marshall Clow 8283ba3704 Refactor some of the operations in <string> so that they can be reused; no functionality change 
llvm-svn: 196788
 2013-12-09 16:00:28 +00:00
Howard Hinnant 395485efc0 Give all members of exception types default visibility. Lack of this is causing some illegal code relocations rare and hard to reproduce cases. 
llvm-svn: 196411
 2013-12-04 21:03:23 +00:00
Marshall Clow c3deeb5f89 Found six (nmostly) identical files named 'test_allocator.h' in the libcxx test suite. Moved one to /support, made it a superset, and removed all but one of the others, and iupdated all the includes. Left the odd one (thread/futures/test_allocator.h) for later. 
llvm-svn: 196174
 2013-12-03 00:18:10 +00:00
Marshall Clow e7d582a75c Found two identical files named 'allocators.h' in the libcxx test suite. Moved one to /support, removed the other, and iupdated all the includes. No functionality change 
llvm-svn: 196127
 2013-12-02 18:08:31 +00:00
Marshall Clow a26fcc7989 Found two identical files named 'DefaultOnly.h' in the libcxx test suite. Moved one to /support, removed the other, and iupdated all the includes. No functionality change 
llvm-svn: 196118
 2013-12-02 17:00:56 +00:00
Marshall Clow 3772a46ab4 Fix for PRPR17934; based on a fix suggested by Peter Sommerlad 
llvm-svn: 196058
 2013-12-02 03:24:33 +00:00
Sylvestre Ledru 3973d59f9b Remove executable permissions on a text file 
llvm-svn: 196041
 2013-12-01 10:15:11 +00:00
Howard Hinnant 6ef2bb02f5 Remove _LIBCPP_TRIVIAL_PAIR_COPY_CTOR=0 for __APPLE__, no longer needed. 
llvm-svn: 195796
 2013-11-27 00:53:02 +00:00
Marshall Clow e34f6f6a12 There were two identical files named 'min_allocator.h'. Move one of them to /support and delete the other. Then adjust all the tests that used them to include the moved one. No functionality change. 
llvm-svn: 195785
 2013-11-26 20:58:02 +00:00
Joerg Sonnenberger c55d97b1f9 Don't use T as template argument, it is part of the application 
namespace.

llvm-svn: 195693
 2013-11-25 22:44:20 +00:00
Yaron Keren e050d66e12 Compiling libcxx with gcc 4.6.4 (MingW) produces these errors: 
type_traits:3280:31: error: expected primary-expression before 'decltype'
 type_traits:3280:29: error: expected ';' at end of member declaration

 memory:2415:49: error: function 'std::__1::default_delete<_Tp>::default_delete()'
 defaulted on its first declaration must not have an exception-specification

 memory:2435:49: error: function 'std::__1::default_delete<_Tp []>::default_delete()'
 defaulted on its first declaration must not have an exception-specification

The attached patch defines _LIBCPP_HAS_NO_ADVANCED_SFINAE and 
_LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS for gcc version < 4.7, making
the library compile with gcc 4.6.4.

llvm-svn: 195431
 2013-11-22 09:22:12 +00:00
Marshall Clow 028875aa7c Patch by Xing Xue to improve libc++ support for AIX 
llvm-svn: 195144
 2013-11-19 19:16:03 +00:00
Marshall Clow eed0bdee59 Fix a test that I broke over the weekend 
llvm-svn: 195143
 2013-11-19 19:14:27 +00:00
Marshall Clow 7e1ea8d288 Patch by Bruce Mitchener. Change all references to EMSCRIPTEN to __EMSCRIPTEN__. If you're not using the PP symbol EMSCRIPTEN, then you should see no functionality change. 
llvm-svn: 195136
 2013-11-19 18:05:03 +00:00
Yaron Keren f16f037060 G M suggestion: conditionally include files on _WIN32. 
llvm-svn: 195045
 2013-11-18 21:30:19 +00:00
Yaron Keren fbeb63c0d1 This patch implements snprintf_l function in a way similar to the other 
functions in src/support/win32/locale_win32.cpp and locale_win32.h, 
calling upon vsnprintf for which there is a MingW correct alternative.

Note! __USE_MINGW_ANSI_STDIO is not modified in this patch. In order to 
use the __mingw version it must be defined before including the MingW 
headers.

llvm-svn: 195044
 2013-11-18 21:12:14 +00:00
Bill Wendling 39d0c93b70 Set the permissions for 'experimental' and its context to the correct values. 
llvm-svn: 194993
 2013-11-18 07:01:16 +00:00
Yaron Keren c0299d7f53 Fix-it suggestion for fixing min or max defines on Windows. 
llvm-svn: 194891
 2013-11-15 23:41:01 +00:00
Yaron Keren 6e72b8ba8c Windows.h is not required. 
llvm-svn: 194870
 2013-11-15 22:54:15 +00:00
Marshall Clow dfdac03c8f Move <optional> into include/experimental, and into the std::experimental namespace, since it's not part of C++14, but of an upcoming TS 
llvm-svn: 194867
 2013-11-15 22:42:10 +00:00
Justin Bogner fd6cfe92d3 Add the CMakeLists.txt that was missed in r194825 
llvm-svn: 194838
 2013-11-15 18:34:43 +00:00
Howard Hinnant 6a0d6cea40 Justin Bogner: This makes the headers available in the build directory, making it 
easier to use freshly-built clang with freshly-built libc++.

Basically, this makes it possible to run clang with libc++ without
having to install it, even if you don't have any version of libc++
installed in /usr/

llvm-svn: 194825
 2013-11-15 17:18:57 +00:00
Howard Hinnant f9fd0d6d11 This is a followup to r194536, which changed the pair copy constructor to be 
trivial in C++03, thus making it trivial in both C++03 and C++11.

This patch allows one to opt-in/out of this decision with a macro.  You can
choose to have the pair copy constructor always be trivial, or always be
non-trivial.  The flag controlling this is now _LIBCPP_TRIVIAL_PAIR_COPY_CTOR.

The client can define this flag to 1, and the pair copy constructor will be
trivial (when possible of course), or to 0, and the pair copy constructor will
be nontrivial.

Default settings for this flag are set in <__config> (as usual).  With this
commit the default is _LIBCPP_TRIVIAL_PAIR_COPY_CTOR=1 for all platforms
except __APPLE__, which defaults to _LIBCPP_TRIVIAL_PAIR_COPY_CTOR=0.

llvm-svn: 194742
 2013-11-14 22:52:25 +00:00