golden hour

/usr/include/c++/4.8.2/bits

File/Folder	Size	Actions
algorithmfwd.h	20.66 KB
alloc_traits.h	17.66 KB
allocator.h	6.1 KB
atomic_base.h	24.99 KB
atomic_lockfree_defines.h	2.2 KB
basic_ios.h	14.76 KB
basic_ios.tcc	5.89 KB
basic_string.h	109.49 KB
basic_string.tcc	38.43 KB
boost_concept_check.h	26.41 KB
c++0x_warning.h	1.47 KB
char_traits.h	16.95 KB
codecvt.h	16.23 KB
concept_check.h	3.26 KB
cpp_type_traits.h	9.56 KB
cxxabi_forced.h	1.77 KB
deque.tcc	31.91 KB
exception_defines.h	1.6 KB
exception_ptr.h	5.29 KB
forward_list.h	46.72 KB
forward_list.tcc	15.17 KB
fstream.tcc	28.3 KB
functexcept.h	3.04 KB
functional_hash.h	6.05 KB
gslice.h	5.39 KB
gslice_array.h	7.59 KB
hash_bytes.h	2.1 KB
hashtable.h	61.05 KB
hashtable_policy.h	52.72 KB
indirect_array.h	7.68 KB
ios_base.h	27.85 KB
istream.tcc	30.36 KB
list.tcc	12.2 KB
locale_classes.h	22.45 KB
locale_classes.tcc	8.18 KB
locale_facets.h	88.84 KB
locale_facets.tcc	38.02 KB
locale_facets_nonio.h	63.51 KB
locale_facets_nonio.tcc	40.85 KB
localefwd.h	5.1 KB
mask_array.h	7.41 KB
memoryfwd.h	2.36 KB
move.h	5.67 KB
nested_exception.h	4.58 KB
ostream.tcc	12.03 KB
ostream_insert.h	3.91 KB
postypes.h	8.02 KB
ptr_traits.h	5.17 KB
random.h	173.19 KB
random.tcc	106.59 KB
range_access.h	3.06 KB
regex.h	83.49 KB
regex_compiler.h	27.68 KB
regex_constants.h	10.81 KB
regex_cursor.h	2.7 KB
regex_error.h	4.5 KB
regex_grep_matcher.h	4.23 KB
regex_grep_matcher.tcc	5.41 KB
regex_nfa.h	10.65 KB
regex_nfa.tcc	4.85 KB
shared_ptr.h	18.97 KB
shared_ptr_base.h	40.65 KB
slice_array.h	9.12 KB
sstream.tcc	9.27 KB
stl_algo.h	212.55 KB
stl_algobase.h	41.41 KB
stl_bvector.h	28.98 KB
stl_construct.h	5.05 KB
stl_deque.h	66.41 KB
stl_function.h	22.06 KB
stl_heap.h	19.99 KB
stl_iterator.h	35.77 KB
stl_iterator_base_funcs.h	6.8 KB
stl_iterator_base_types.h	8.19 KB
stl_list.h	52.83 KB
stl_map.h	36.78 KB
stl_multimap.h	33.94 KB
stl_multiset.h	28.37 KB
stl_numeric.h	13.5 KB
stl_pair.h	9.63 KB
stl_queue.h	18.21 KB
stl_raw_storage_iter.h	3.37 KB
stl_relops.h	4.49 KB
stl_set.h	28.61 KB
stl_stack.h	9.65 KB
stl_tempbuf.h	8.15 KB
stl_tree.h	53.56 KB
stl_uninitialized.h	19.95 KB
stl_vector.h	48.64 KB
stream_iterator.h	6.44 KB
streambuf.tcc	4.81 KB
streambuf_iterator.h	12.33 KB
stringfwd.h	2.37 KB
unique_ptr.h	17.19 KB
unordered_map.h	47.76 KB
unordered_set.h	43.25 KB
uses_allocator.h	3.49 KB
valarray_after.h	22.12 KB
valarray_array.h	21.23 KB
valarray_array.tcc	7.08 KB
valarray_before.h	18.08 KB
vector.tcc	25.55 KB

Edit: nested_exception.h

// Nested Exception support header (nested_exception class) for -*- C++ -*-

// Copyright (C) 2009-2013 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/** @file bits/nested_exception.h
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @headername{exception}
 */

#ifndef _GLIBCXX_NESTED_EXCEPTION_H
#define _GLIBCXX_NESTED_EXCEPTION_H 1

#pragma GCC visibility push(default)

#if __cplusplus < 201103L
# include <bits/c++0x_warning.h>
#else

#include <bits/c++config.h>

#if ATOMIC_INT_LOCK_FREE < 2
#  error This platform does not support exception propagation.
#endif

extern "C++" {

namespace std
{
  /**
   * @addtogroup exceptions
   * @{
   */

/// Exception class with exception_ptr data member.
  class nested_exception
  {
    exception_ptr _M_ptr;

public:
    nested_exception() noexcept : _M_ptr(current_exception()) { }

nested_exception(const nested_exception&) = default;

nested_exception& operator=(const nested_exception&) = default;

virtual ~nested_exception() noexcept;

void
    rethrow_nested() const __attribute__ ((__noreturn__))
    { rethrow_exception(_M_ptr); }

exception_ptr
    nested_ptr() const
    { return _M_ptr; }
  };

template<typename _Except>
    struct _Nested_exception : public _Except, public nested_exception
    {
      explicit _Nested_exception(_Except&& __ex)
      : _Except(static_cast<_Except&&>(__ex))
      { }
    };

template<typename _Ex>
    struct __get_nested_helper
    {
      static const nested_exception*
      _S_get(const _Ex& __ex)
      { return dynamic_cast<const nested_exception*>(&__ex); }
    };

template<typename _Ex>
    struct __get_nested_helper<_Ex*>
    {
      static const nested_exception*
      _S_get(const _Ex* __ex)
      { return dynamic_cast<const nested_exception*>(__ex); }
    };

template<typename _Ex>
    inline const nested_exception*
    __get_nested_exception(const _Ex& __ex)
    { return __get_nested_helper<_Ex>::_S_get(__ex); }

template<typename _Ex>
    void
    __throw_with_nested(_Ex&&, const nested_exception* = 0)
    __attribute__ ((__noreturn__));

template<typename _Ex>
    void
    __throw_with_nested(_Ex&&, ...) __attribute__ ((__noreturn__));

// This function should never be called, but is needed to avoid a warning
  // about ambiguous base classes when instantiating throw_with_nested<_Ex>()
  // with a type that has an accessible nested_exception base.
  template<typename _Ex>
    inline void
    __throw_with_nested(_Ex&& __ex, const nested_exception*)
    { throw __ex; }

template<typename _Ex>
    inline void
    __throw_with_nested(_Ex&& __ex, ...)
    { throw _Nested_exception<_Ex>(static_cast<_Ex&&>(__ex)); }
  
  template<typename _Ex>
    void
    throw_with_nested(_Ex __ex) __attribute__ ((__noreturn__));

/// If @p __ex is derived from nested_exception, @p __ex. 
  /// Else, an implementation-defined object derived from both.
  template<typename _Ex>
    inline void
    throw_with_nested(_Ex __ex)
    {
      if (__get_nested_exception(__ex))
        throw __ex;
      __throw_with_nested(static_cast<_Ex&&>(__ex), &__ex);
    }

/// If @p __ex is derived from nested_exception, @p __ex.rethrow_nested().
  template<typename _Ex>
    inline void
    rethrow_if_nested(const _Ex& __ex)
    {
      if (const nested_exception* __nested = __get_nested_exception(__ex))
        __nested->rethrow_nested();
    }

/// Overload, See N2619
  inline void
  rethrow_if_nested(const nested_exception& __ex)
  { __ex.rethrow_nested(); }

// @} group exceptions
} // namespace std

} // extern "C++"

#endif // C++11

#pragma GCC visibility pop

#endif // _GLIBCXX_NESTED_EXCEPTION_H