FM / bits

/usr/include/c++/11/bits

Name	Size	Mode	Actions
algorithmfwd.h	24547	0644	edit dl rm
align.h	3711	0644	edit dl rm
allocated_ptr.h	3329	0644	edit dl rm
allocator.h	9737	0644	edit dl rm
alloc_traits.h	27632	0644	edit dl rm
atomic_base.h	57414	0644	edit dl rm
atomic_futex.h	12394	0644	edit dl rm
atomic_lockfree_defines.h	2353	0644	edit dl rm
atomic_timed_wait.h	13530	0644	edit dl rm
atomic_wait.h	12557	0644	edit dl rm
basic_ios.h	16080	0644	edit dl rm
basic_ios.tcc	6083	0644	edit dl rm
basic_string.h	251944	0644	edit dl rm
basic_string.tcc	54189	0644	edit dl rm
boost_concept_check.h	27182	0644	edit dl rm
c++0x_warning.h	1474	0644	edit dl rm
charconv.h	3435	0644	edit dl rm
char_traits.h	29350	0644	edit dl rm
codecvt.h	25500	0644	edit dl rm
concept_check.h	3423	0644	edit dl rm
cpp_type_traits.h	14003	0644	edit dl rm
cxxabi_forced.h	1811	0644	edit dl rm
cxxabi_init_exception.h	2220	0644	edit dl rm
deque.tcc	42361	0644	edit dl rm
enable_special_members.h	12452	0644	edit dl rm
erase_if.h	2066	0644	edit dl rm
exception.h	2504	0644	edit dl rm
exception_defines.h	1645	0644	edit dl rm
exception_ptr.h	7640	0644	edit dl rm
forward_list.h	50387	0644	edit dl rm
forward_list.tcc	14035	0644	edit dl rm
fstream.tcc	33672	0644	edit dl rm
fs_dir.h	16409	0644	edit dl rm
fs_fwd.h	10771	0644	edit dl rm
fs_ops.h	10739	0644	edit dl rm
fs_path.h	39745	0644	edit dl rm
functexcept.h	3509	0644	edit dl rm
functional_hash.h	8591	0644	edit dl rm
gslice.h	5519	0644	edit dl rm
gslice_array.h	7892	0644	edit dl rm
hashtable.h	84951	0644	edit dl rm
hashtable_policy.h	62156	0644	edit dl rm
hash_bytes.h	2146	0644	edit dl rm
indirect_array.h	7902	0644	edit dl rm
invoke.h	6059	0644	edit dl rm
ios_base.h	31934	0644	edit dl rm
istream.tcc	31595	0644	edit dl rm
iterator_concepts.h	33335	0644	edit dl rm
list.tcc	17201	0644	edit dl rm
localefwd.h	5943	0644	edit dl rm
locale_classes.h	25044	0644	edit dl rm
locale_classes.tcc	8375	0644	edit dl rm
locale_conv.h	18822	0644	edit dl rm
locale_facets.h	93655	0644	edit dl rm
locale_facets.tcc	40463	0644	edit dl rm
locale_facets_nonio.h	69704	0644	edit dl rm
locale_facets_nonio.tcc	47533	0644	edit dl rm
mask_array.h	7716	0644	edit dl rm
max_size_type.h	22715	0644	edit dl rm
memoryfwd.h	2504	0644	edit dl rm
move.h	6798	0644	edit dl rm
nested_exception.h	4887	0644	edit dl rm
node_handle.h	10920	0644	edit dl rm
ostream.tcc	12315	0644	edit dl rm
ostream_insert.h	4038	0644	edit dl rm
parse_numbers.h	7980	0644	edit dl rm
postypes.h	8465	0644	edit dl rm
predefined_ops.h	10177	0644	edit dl rm
ptr_traits.h	6708	0644	edit dl rm
quoted_string.h	5053	0644	edit dl rm
random.h	178359	0644	edit dl rm
random.tcc	105688	0644	edit dl rm
ranges_algo.h	116831	0644	edit dl rm
ranges_algobase.h	18871	0644	edit dl rm
ranges_base.h	24392	0644	edit dl rm
ranges_cmp.h	6017	0644	edit dl rm
ranges_uninitialized.h	18130	0644	edit dl rm
ranges_util.h	20591	0644	edit dl rm
range_access.h	10707	0644	edit dl rm
refwrap.h	13208	0644	edit dl rm
regex.h	103969	0644	edit dl rm
regex.tcc	16492	0644	edit dl rm
regex_automaton.h	10788	0644	edit dl rm
regex_automaton.tcc	7722	0644	edit dl rm
regex_compiler.h	16219	0644	edit dl rm
regex_compiler.tcc	19158	0644	edit dl rm
regex_constants.h	15549	0644	edit dl rm
regex_error.h	5015	0644	edit dl rm
regex_executor.h	8852	0644	edit dl rm
regex_executor.tcc	18837	0644	edit dl rm
regex_scanner.h	7047	0644	edit dl rm
regex_scanner.tcc	15249	0644	edit dl rm
semaphore_base.h	7936	0644	edit dl rm
shared_ptr.h	30981	0644	edit dl rm
shared_ptr_atomic.h	9874	0644	edit dl rm
shared_ptr_base.h	54907	0644	edit dl rm
slice_array.h	9619	0644	edit dl rm
specfun.h	47240	0644	edit dl rm
sstream.tcc	10148	0644	edit dl rm
std_abs.h	3384	0644	edit dl rm
std_function.h	22863	0644	edit dl rm
std_mutex.h	6443	0644	edit dl rm
std_thread.h	8589	0644	edit dl rm
stl_algo.h	214703	0644	edit dl rm
stl_algobase.h	76254	0644	edit dl rm
stl_bvector.h	35574	0644	edit dl rm
stl_construct.h	8800	0644	edit dl rm
stl_deque.h	76970	0644	edit dl rm
stl_function.h	43897	0644	edit dl rm
stl_heap.h	20756	0644	edit dl rm
stl_iterator.h	78851	0644	edit dl rm
stl_iterator_base_funcs.h	8178	0644	edit dl rm
stl_iterator_base_types.h	9662	0644	edit dl rm
stl_list.h	69779	0644	edit dl rm
stl_map.h	54693	0644	edit dl rm
stl_multimap.h	43534	0644	edit dl rm
stl_multiset.h	37675	0644	edit dl rm
stl_numeric.h	14601	0644	edit dl rm
stl_pair.h	20135	0644	edit dl rm
stl_queue.h	25036	0644	edit dl rm
stl_raw_storage_iter.h	3830	0644	edit dl rm
stl_relops.h	4594	0644	edit dl rm
stl_set.h	37939	0644	edit dl rm
stl_stack.h	12684	0644	edit dl rm
stl_tempbuf.h	8655	0644	edit dl rm
stl_tree.h	73922	0644	edit dl rm
stl_uninitialized.h	34013	0644	edit dl rm
stl_vector.h	65919	0644	edit dl rm
streambuf.tcc	4929	0644	edit dl rm
streambuf_iterator.h	15532	0644	edit dl rm
stream_iterator.h	7697	0644	edit dl rm
stringfwd.h	2690	0644	edit dl rm
string_view.tcc	7167	0644	edit dl rm
this_thread_sleep.h	3307	0644	edit dl rm
uniform_int_dist.h	13052	0644	edit dl rm
unique_lock.h	6143	0644	edit dl rm
unique_ptr.h	32537	0644	edit dl rm
unordered_map.h	76669	0644	edit dl rm
unordered_set.h	62934	0644	edit dl rm
uses_allocator.h	6906	0644	edit dl rm
uses_allocator_args.h	7562	0644	edit dl rm
valarray_after.h	23283	0644	edit dl rm
valarray_array.h	21295	0644	edit dl rm
valarray_array.tcc	7254	0644	edit dl rm
valarray_before.h	19142	0644	edit dl rm
vector.tcc	30985	0644	edit dl rm

Edit: /usr/include/c++/11/bits/regex_automaton.h (10788B)

// class template regex -*- C++ -*-

// Copyright (C) 2013-2021 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/regex_automaton.h
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @headername{regex}
 */

// This macro defines the maximal state number a NFA can have.
#ifndef _GLIBCXX_REGEX_STATE_LIMIT
#define _GLIBCXX_REGEX_STATE_LIMIT 100000
#endif

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

namespace __detail
{
  /**
   *  @defgroup regex-detail Base and Implementation Classes
   *  @ingroup regex
   *  @{
   */

typedef long _StateIdT;
  static const _StateIdT _S_invalid_state_id  = -1;

template<typename _CharT>
    using _Matcher = std::function<bool (_CharT)>;

/// Operation codes that define the type of transitions within the base NFA
  /// that represents the regular expression.
  enum _Opcode : int
  {
      _S_opcode_unknown,
      _S_opcode_alternative,
      _S_opcode_repeat,
      _S_opcode_backref,
      _S_opcode_line_begin_assertion,
      _S_opcode_line_end_assertion,
      _S_opcode_word_boundary,
      _S_opcode_subexpr_lookahead,
      _S_opcode_subexpr_begin,
      _S_opcode_subexpr_end,
      _S_opcode_dummy,
      _S_opcode_match,
      _S_opcode_accept,
  };

struct _State_base
  {
  protected:
    _Opcode      _M_opcode;           // type of outgoing transition

public:
    _StateIdT    _M_next;             // outgoing transition
    union // Since they are mutually exclusive.
    {
      size_t _M_subexpr;        // for _S_opcode_subexpr_*
      size_t _M_backref_index;  // for _S_opcode_backref
      struct
      {
	// for _S_opcode_alternative, _S_opcode_repeat and
	// _S_opcode_subexpr_lookahead
	_StateIdT  _M_alt;
	// for _S_opcode_word_boundary or _S_opcode_subexpr_lookahead or
	// quantifiers (ungreedy if set true)
	bool       _M_neg;
      };
      // For _S_opcode_match
      __gnu_cxx::__aligned_membuf<_Matcher<char>> _M_matcher_storage;
    };

protected:
    explicit _State_base(_Opcode __opcode) noexcept
    : _M_opcode(__opcode), _M_next(_S_invalid_state_id)
    { }

public:
    bool
    _M_has_alt() const noexcept
    {
      return _M_opcode == _S_opcode_alternative
	|| _M_opcode == _S_opcode_repeat
	|| _M_opcode == _S_opcode_subexpr_lookahead;
    }

#ifdef _GLIBCXX_DEBUG
    std::ostream&
    _M_print(std::ostream& ostr) const;

// Prints graphviz dot commands for state.
    std::ostream&
    _M_dot(std::ostream& __ostr, _StateIdT __id) const;
#endif
  };

template<typename _Char_type>
    struct _State : _State_base
    {
      typedef _Matcher<_Char_type> _MatcherT;
      static_assert(sizeof(_MatcherT) == sizeof(_Matcher<char>),
		    "std::function<bool(T)> has the same size as "
		    "std::function<bool(char)>");
      static_assert(alignof(_MatcherT) == alignof(_Matcher<char>),
		    "std::function<bool(T)> has the same alignment as "
		    "std::function<bool(char)>");

explicit
      _State(_Opcode __opcode) noexcept : _State_base(__opcode)
      {
	if (_M_opcode() == _S_opcode_match)
	  new (this->_M_matcher_storage._M_addr()) _MatcherT();
      }

_State(const _State& __rhs) : _State_base(__rhs)
      {
	if (__rhs._M_opcode() == _S_opcode_match)
	  new (this->_M_matcher_storage._M_addr())
	    _MatcherT(__rhs._M_get_matcher());
      }

_State(_State&& __rhs) noexcept : _State_base(__rhs)
      {
	if (__rhs._M_opcode() == _S_opcode_match)
	  new (this->_M_matcher_storage._M_addr())
	    _MatcherT(std::move(__rhs._M_get_matcher()));
      }

_State&
      operator=(const _State&) = delete;

~_State()
      {
	if (_M_opcode() == _S_opcode_match)
	  _M_get_matcher().~_MatcherT();
      }

// Since correct ctor and dtor rely on _M_opcode, it's better not to
      // change it over time.
      _Opcode
      _M_opcode() const noexcept
      { return _State_base::_M_opcode; }

bool
      _M_matches(_Char_type __char) const
      { return _M_get_matcher()(__char); }

_MatcherT&
      _M_get_matcher() noexcept
      { return *static_cast<_MatcherT*>(this->_M_matcher_storage._M_addr()); }

const _MatcherT&
      _M_get_matcher() const noexcept
      {
	return *static_cast<const _MatcherT*>(
	    this->_M_matcher_storage._M_addr());
      }
    };

struct _NFA_base
  {
    typedef regex_constants::syntax_option_type _FlagT;

explicit
    _NFA_base(_FlagT __f) noexcept
    : _M_flags(__f), _M_start_state(0), _M_subexpr_count(0),
    _M_has_backref(false)
    { }

_NFA_base(_NFA_base&&) = default;

protected:
    ~_NFA_base() = default;

public:
    _FlagT
    _M_options() const noexcept
    { return _M_flags; }

_StateIdT
    _M_start() const noexcept
    { return _M_start_state; }

size_t
    _M_sub_count() const noexcept
    { return _M_subexpr_count; }

_GLIBCXX_STD_C::vector<size_t> _M_paren_stack;
    _FlagT                    _M_flags;
    _StateIdT                 _M_start_state;
    size_t                    _M_subexpr_count;
    bool                      _M_has_backref;
  };

template<typename _TraitsT>
    struct _NFA
    : _NFA_base, _GLIBCXX_STD_C::vector<_State<typename _TraitsT::char_type>>
    {
      typedef typename _TraitsT::char_type	_Char_type;
      typedef _State<_Char_type>		_StateT;
      typedef _Matcher<_Char_type>		_MatcherT;

_NFA(const typename _TraitsT::locale_type& __loc, _FlagT __flags)
      : _NFA_base(__flags)
      { _M_traits.imbue(__loc); }

// for performance reasons _NFA objects should only be moved not copied
      _NFA(const _NFA&) = delete;
      _NFA(_NFA&&) = default;

_StateIdT
      _M_insert_accept()
      {
	auto __ret = _M_insert_state(_StateT(_S_opcode_accept));
	return __ret;
      }

_StateIdT
      _M_insert_alt(_StateIdT __next, _StateIdT __alt,
		    bool __neg __attribute__((__unused__)))
      {
	_StateT __tmp(_S_opcode_alternative);
	// It labels every quantifier to make greedy comparison easier in BFS
	// approach.
	__tmp._M_next = __next;
	__tmp._M_alt = __alt;
	return _M_insert_state(std::move(__tmp));
      }

_StateIdT
      _M_insert_repeat(_StateIdT __next, _StateIdT __alt, bool __neg)
      {
	_StateT __tmp(_S_opcode_repeat);
	// It labels every quantifier to make greedy comparison easier in BFS
	// approach.
	__tmp._M_next = __next;
	__tmp._M_alt = __alt;
	__tmp._M_neg = __neg;
	return _M_insert_state(std::move(__tmp));
      }

_StateIdT
      _M_insert_matcher(_MatcherT __m)
      {
	_StateT __tmp(_S_opcode_match);
	__tmp._M_get_matcher() = std::move(__m);
	return _M_insert_state(std::move(__tmp));
      }

_StateIdT
      _M_insert_subexpr_begin()
      {
	auto __id = this->_M_subexpr_count++;
	this->_M_paren_stack.push_back(__id);
	_StateT __tmp(_S_opcode_subexpr_begin);
	__tmp._M_subexpr = __id;
	return _M_insert_state(std::move(__tmp));
      }

_StateIdT
      _M_insert_subexpr_end()
      {
	_StateT __tmp(_S_opcode_subexpr_end);
	__tmp._M_subexpr = this->_M_paren_stack.back();
	this->_M_paren_stack.pop_back();
	return _M_insert_state(std::move(__tmp));
      }

_StateIdT
      _M_insert_backref(size_t __index);

_StateIdT
      _M_insert_line_begin()
      { return _M_insert_state(_StateT(_S_opcode_line_begin_assertion)); }

_StateIdT
      _M_insert_line_end()
      { return _M_insert_state(_StateT(_S_opcode_line_end_assertion)); }

_StateIdT
      _M_insert_word_bound(bool __neg)
      {
	_StateT __tmp(_S_opcode_word_boundary);
	__tmp._M_neg = __neg;
	return _M_insert_state(std::move(__tmp));
      }

_StateIdT
      _M_insert_lookahead(_StateIdT __alt, bool __neg)
      {
	_StateT __tmp(_S_opcode_subexpr_lookahead);
	__tmp._M_alt = __alt;
	__tmp._M_neg = __neg;
	return _M_insert_state(std::move(__tmp));
      }

_StateIdT
      _M_insert_dummy()
      { return _M_insert_state(_StateT(_S_opcode_dummy)); }

_StateIdT
      _M_insert_state(_StateT __s)
      {
	this->push_back(std::move(__s));
	if (this->size() > _GLIBCXX_REGEX_STATE_LIMIT)
	  __throw_regex_error(
	    regex_constants::error_space,
	    "Number of NFA states exceeds limit. Please use shorter regex "
	    "string, or use smaller brace expression, or make "
	    "_GLIBCXX_REGEX_STATE_LIMIT larger.");
	return this->size() - 1;
      }

// Eliminate dummy node in this NFA to make it compact.
      void
      _M_eliminate_dummy();

#ifdef _GLIBCXX_DEBUG
      std::ostream&
      _M_dot(std::ostream& __ostr) const;
#endif
    public:
      _TraitsT                  _M_traits;
    };

/// Describes a sequence of one or more %_State, its current start
  /// and end(s).  This structure contains fragments of an NFA during
  /// construction.
  template<typename _TraitsT>
    class _StateSeq
    {
    public:
      typedef _NFA<_TraitsT> _RegexT;

public:
      _StateSeq(_RegexT& __nfa, _StateIdT __s)
      : _M_nfa(__nfa), _M_start(__s), _M_end(__s)
      { }

_StateSeq(_RegexT& __nfa, _StateIdT __s, _StateIdT __end)
      : _M_nfa(__nfa), _M_start(__s), _M_end(__end)
      { }

// Append a state on *this and change *this to the new sequence.
      void
      _M_append(_StateIdT __id)
      {
	_M_nfa[_M_end]._M_next = __id;
	_M_end = __id;
      }

// Append a sequence on *this and change *this to the new sequence.
      void
      _M_append(const _StateSeq& __s)
      {
	_M_nfa[_M_end]._M_next = __s._M_start;
	_M_end = __s._M_end;
      }

// Clones an entire sequence.
      _StateSeq
      _M_clone();

public:
      _RegexT&  _M_nfa;
      _StateIdT _M_start;
      _StateIdT _M_end;
    };

///@} regex-detail
} // namespace __detail

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std

#include <bits/regex_automaton.tcc>

cmd: