gdbsupport: remove gdb::optional

The previous patch migrated all the uses of gdb::optional to use
std::optional instead,  so gdb::optional can be removed entirely
as well as the self-tests which came with it.

Change-Id: I96ecd67b850b01be10ef00eb85a78ac647d5adc7
Approved-By: Tom Tromey <tom@tromey.com>
Approved-By: Pedro Alves <pedro@palves.net>

7 files changed, 0 insertions, 906 deletions

diff --git a/gdb/unittests/optional/assignment/1.cc b/gdb/unittests/optional/assignment/1.cc
deleted file mode 100644
index 6a68f7d..0000000
--- a/gdb/unittests/optional/assignment/1.cc
+++ /dev/null
@@ -1,196 +0,0 @@
-// Copyright (C) 2013-2023 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.
-
-// You should have received a copy of the GNU General Public License along
-// with this library; see the file COPYING3.  If not see
-// <http://www.gnu.org/licenses/>.
-
-namespace assign_1 {
-
-struct exception {};
-
-static int counter = 0;
-
-struct mixin_counter
-{
-  mixin_counter() { ++counter; }
-  mixin_counter(mixin_counter const&) { ++counter; }
-  ~mixin_counter() { --counter; }
-};
-
-struct value_type : private mixin_counter
-{
-  enum state_type
-  {
-    zero,
-    moved_from,
-    throwing_construction,
-    throwing_copy,
-    throwing_copy_assignment,
-    throwing_move,
-    throwing_move_assignment,
-    threw,
-  };
-
-  value_type() = default;
-
-  explicit value_type(state_type state_)
-  : state(state_)
-  {
-    throw_if(throwing_construction);
-  }
-
-  value_type(value_type const& other)
-  : state(other.state)
-  {
-    throw_if(throwing_copy);
-  }
-
-  value_type&
-  operator=(value_type const& other)
-  {
-    state = other.state;
-    throw_if(throwing_copy_assignment);
-    return *this;
-  }
-
-  value_type(value_type&& other)
-  : state(other.state)
-  {
-    other.state = moved_from;
-    throw_if(throwing_move);
-  }
-
-  value_type&
-  operator=(value_type&& other)
-  {
-    state = other.state;
-    other.state = moved_from;
-    throw_if(throwing_move_assignment);
-    return *this;
-  }
-
-  void throw_if(state_type match)
-  {
-    if(state == match)
-    {
-      state = threw;
-      throw exception {};
-    }
-  }
-
-  state_type state = zero;
-};
-
-static void
-test ()
-{
-  using O = gdb::optional<value_type>;
-  using S = value_type::state_type;
-  auto const make = [](S s = S::zero) { return O { gdb::in_place, s }; };
-
-  enum outcome_type { nothrow, caught, bad_catch };
-
-  // Check copy/move assignment for disengaged optional
-
-  // From disengaged optional
-  {
-    O o;
-    VERIFY( !o );
-    O p;
-    o = p;
-    VERIFY( !o );
-    VERIFY( !p );
-  }
-
-  {
-    O o;
-    VERIFY( !o );
-    O p;
-    o = std::move(p);
-    VERIFY( !o );
-    VERIFY( !p );
-  }
-
-#ifndef GDB_OPTIONAL
-  {
-    O o;
-    VERIFY( !o );
-    o = {};
-    VERIFY( !o );
-  }
-#endif
-
-  // From engaged optional
-  {
-    O o;
-    VERIFY( !o );
-    O p = make(S::throwing_copy_assignment);
-    o = p;
-    VERIFY( o && o->state == S::throwing_copy_assignment );
-    VERIFY( p && p->state == S::throwing_copy_assignment );
-  }
-
-  {
-    O o;
-    VERIFY( !o );
-    O p = make(S::throwing_move_assignment);
-    o = std::move(p);
-    VERIFY( o && o->state == S::throwing_move_assignment );
-    VERIFY( p && p->state == S::moved_from );
-  }
-
-  {
-    outcome_type outcome {};
-    O o;
-    VERIFY( !o );
-    O p = make(S::throwing_copy);
-
-    try
-    {
-      o = p;
-    }
-    catch(exception const&)
-    { outcome = caught; }
-    catch(...)
-    { outcome = bad_catch; }
-
-    VERIFY( outcome == caught );
-    VERIFY( !o );
-    VERIFY( p && p->state == S::throwing_copy );
-  }
-
-  {
-    outcome_type outcome {};
-    O o;
-    VERIFY( !o );
-    O p = make(S::throwing_move);
-
-    try
-    {
-      o = std::move(p);
-    }
-    catch(exception const&)
-    { outcome = caught; }
-    catch(...)
-    { outcome = bad_catch; }
-
-    VERIFY( outcome == caught );
-    VERIFY( !o );
-    VERIFY( p && p->state == S::moved_from );
-  }
-
-  VERIFY( counter == 0 );
-}
-
-} // namespace assign_1
diff --git a/gdb/unittests/optional/assignment/2.cc b/gdb/unittests/optional/assignment/2.cc
deleted file mode 100644
index 2e63a49..0000000
--- a/gdb/unittests/optional/assignment/2.cc
+++ /dev/null
@@ -1,194 +0,0 @@
-// Copyright (C) 2013-2023 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.
-
-// You should have received a copy of the GNU General Public License along
-// with this library; see the file COPYING3.  If not see
-// <http://www.gnu.org/licenses/>.
-
-namespace assign_2 {
-
-struct exception {};
-
-static int counter = 0;
-
-struct mixin_counter
-{
-  mixin_counter() { ++counter; }
-  mixin_counter(mixin_counter const&) { ++counter; }
-  ~mixin_counter() { --counter; }
-};
-
-struct value_type : private mixin_counter
-{
-  enum state_type
-  {
-    zero,
-    moved_from,
-    throwing_construction,
-    throwing_copy,
-    throwing_copy_assignment,
-    throwing_move,
-    throwing_move_assignment,
-    threw,
-  };
-
-  value_type() = default;
-
-  explicit value_type(state_type state_)
-  : state(state_)
-  {
-    throw_if(throwing_construction);
-  }
-
-  value_type(value_type const& other)
-  : state(other.state)
-  {
-    throw_if(throwing_copy);
-  }
-
-  value_type&
-  operator=(value_type const& other)
-  {
-    state = other.state;
-    throw_if(throwing_copy_assignment);
-    return *this;
-  }
-
-  value_type(value_type&& other)
-  : state(other.state)
-  {
-    other.state = moved_from;
-    throw_if(throwing_move);
-  }
-
-  value_type&
-  operator=(value_type&& other)
-  {
-    state = other.state;
-    other.state = moved_from;
-    throw_if(throwing_move_assignment);
-    return *this;
-  }
-
-  void throw_if(state_type match)
-  {
-    if(state == match)
-    {
-      state = threw;
-      throw exception {};
-    }
-  }
-
-  state_type state = zero;
-};
-
-static void
-test ()
-{
-  using O = gdb::optional<value_type>;
-  using S = value_type::state_type;
-  auto const make = [](S s = S::zero) { return O { gdb::in_place, s }; };
-
-  enum outcome_type { nothrow, caught, bad_catch };
-
-  // Check copy/move assignment for engaged optional
-
-  // From disengaged optional
-  {
-    O o = make(S::zero);
-    VERIFY( o );
-    O p;
-    o = p;
-    VERIFY( !o );
-    VERIFY( !p );
-  }
-
-  {
-    O o = make(S::zero);
-    VERIFY( o );
-    O p;
-    o = std::move(p);
-    VERIFY( !o );
-    VERIFY( !p );
-  }
-
-#ifndef GDB_OPTIONAL
-  {
-    O o = make(S::zero);
-    VERIFY( o );
-    o = {};
-    VERIFY( !o );
-  }
-#endif
-
-  // From engaged optional
-  {
-    O o = make(S::zero);
-    VERIFY( o );
-    O p = make(S::throwing_copy);
-    o = p;
-    VERIFY( o && o->state == S::throwing_copy);
-    VERIFY( p && p->state == S::throwing_copy);
-  }
-
-  {
-    O o = make(S::zero);
-    VERIFY( o );
-    O p = make(S::throwing_move);
-    o = std::move(p);
-    VERIFY( o && o->state == S::throwing_move);
-    VERIFY( p && p->state == S::moved_from);
-  }
-
-  {
-    ATTRIBUTE_UNUSED outcome_type outcome {};
-    O o = make(S::zero);
-    VERIFY( o );
-    O p = make(S::throwing_copy_assignment);
-
-    try
-    {
-      o = p;
-    }
-    catch(exception const&)
-    { outcome = caught; }
-    catch(...)
-    { outcome = bad_catch; }
-
-    VERIFY( o && o->state == S::threw);
-    VERIFY( p && p->state == S::throwing_copy_assignment);
-  }
-
-  {
-    ATTRIBUTE_UNUSED outcome_type outcome {};
-    O o = make(S::zero);
-    VERIFY( o );
-    O p = make(S::throwing_move_assignment);
-
-    try
-    {
-      o = std::move(p);
-    }
-    catch(exception const&)
-    { outcome = caught; }
-    catch(...)
-    { outcome = bad_catch; }
-
-    VERIFY( o && o->state == S::threw);
-    VERIFY( p && p->state == S::moved_from);
-  }
-
-  VERIFY( counter == 0 );
-}
-
-} // namespace assign_2
diff --git a/gdb/unittests/optional/assignment/3.cc b/gdb/unittests/optional/assignment/3.cc
deleted file mode 100644
index a1d0934..0000000
--- a/gdb/unittests/optional/assignment/3.cc
+++ /dev/null
@@ -1,157 +0,0 @@
-// Copyright (C) 2013-2023 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.
-
-// You should have received a copy of the GNU General Public License along
-// with this library; see the file COPYING3.  If not see
-// <http://www.gnu.org/licenses/>.
-
-namespace assign_3 {
-
-struct exception {};
-
-static int counter = 0;
-
-struct mixin_counter
-{
-  mixin_counter() { ++counter; }
-  mixin_counter(mixin_counter const&) { ++counter; }
-  ~mixin_counter() { --counter; }
-};
-
-struct value_type : private mixin_counter
-{
-  enum state_type
-  {
-    zero,
-    moved_from,
-    throwing_construction,
-    throwing_copy,
-    throwing_copy_assignment,
-    throwing_move,
-    throwing_move_assignment,
-    threw,
-  };
-
-  value_type() = default;
-
-  explicit value_type(state_type state_)
-  : state(state_)
-  {
-    throw_if(throwing_construction);
-  }
-
-  value_type(value_type const& other)
-  : state(other.state)
-  {
-    throw_if(throwing_copy);
-  }
-
-  value_type&
-  operator=(value_type const& other)
-  {
-    state = other.state;
-    throw_if(throwing_copy_assignment);
-    return *this;
-  }
-
-  value_type(value_type&& other)
-  : state(other.state)
-  {
-    other.state = moved_from;
-    throw_if(throwing_move);
-  }
-
-  value_type&
-  operator=(value_type&& other)
-  {
-    state = other.state;
-    other.state = moved_from;
-    throw_if(throwing_move_assignment);
-    return *this;
-  }
-
-  void throw_if(state_type match)
-  {
-    if(state == match)
-    {
-      state = threw;
-      throw exception {};
-    }
-  }
-
-  state_type state = zero;
-};
-
-static void
-test ()
-{
-  using O = gdb::optional<value_type>;
-  using S = value_type::state_type;
-  auto const make = [](S s = S::zero) { return value_type { s }; };
-
-  enum outcome_type { nothrow, caught, bad_catch };
-
-  // Check value assignment for disengaged optional
-
-  {
-    O o;
-    value_type v = make(S::throwing_copy_assignment);
-    o = v;
-    VERIFY( o && o->state == S::throwing_copy_assignment );
-  }
-
-  {
-    O o;
-    value_type v = make(S::throwing_move_assignment);
-    o = std::move(v);
-    VERIFY( o && o->state == S::throwing_move_assignment );
-  }
-
-  {
-    ATTRIBUTE_UNUSED outcome_type outcome {};
-    O o;
-    value_type v = make(S::throwing_copy);
-
-    try
-    {
-      o = v;
-    }
-    catch(exception const&)
-    { outcome = caught; }
-    catch(...)
-    { outcome = bad_catch; }
-
-    VERIFY( !o );
-  }
-
-  {
-    ATTRIBUTE_UNUSED outcome_type outcome {};
-    O o;
-    value_type v = make(S::throwing_move);
-
-    try
-    {
-      o = std::move(v);
-    }
-    catch(exception const&)
-    { outcome = caught; }
-    catch(...)
-    { outcome = bad_catch; }
-
-    VERIFY( !o );
-  }
-
-  VERIFY( counter == 0 );
-}
-
-} // namespace assign_3
diff --git a/gdb/unittests/optional/assignment/4.cc b/gdb/unittests/optional/assignment/4.cc
deleted file mode 100644
index 2ad5978..0000000
--- a/gdb/unittests/optional/assignment/4.cc
+++ /dev/null
@@ -1,157 +0,0 @@
-// Copyright (C) 2013-2023 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.
-
-// You should have received a copy of the GNU General Public License along
-// with this library; see the file COPYING3.  If not see
-// <http://www.gnu.org/licenses/>.
-
-namespace assign_4 {
-
-struct exception {};
-
-static int counter = 0;
-
-struct mixin_counter
-{
-  mixin_counter() { ++counter; }
-  mixin_counter(mixin_counter const&) { ++counter; }
-  ~mixin_counter() { --counter; }
-};
-
-struct value_type : private mixin_counter
-{
-  enum state_type
-  {
-    zero,
-    moved_from,
-    throwing_construction,
-    throwing_copy,
-    throwing_copy_assignment,
-    throwing_move,
-    throwing_move_assignment,
-    threw,
-  };
-
-  value_type() = default;
-
-  explicit value_type(state_type state_)
-  : state(state_)
-  {
-    throw_if(throwing_construction);
-  }
-
-  value_type(value_type const& other)
-  : state(other.state)
-  {
-    throw_if(throwing_copy);
-  }
-
-  value_type&
-  operator=(value_type const& other)
-  {
-    state = other.state;
-    throw_if(throwing_copy_assignment);
-    return *this;
-  }
-
-  value_type(value_type&& other)
-  : state(other.state)
-  {
-    other.state = moved_from;
-    throw_if(throwing_move);
-  }
-
-  value_type&
-  operator=(value_type&& other)
-  {
-    state = other.state;
-    other.state = moved_from;
-    throw_if(throwing_move_assignment);
-    return *this;
-  }
-
-  void throw_if(state_type match)
-  {
-    if(state == match)
-    {
-      state = threw;
-      throw exception {};
-    }
-  }
-
-  state_type state = zero;
-};
-
-static void
-test ()
-{
-  using O = gdb::optional<value_type>;
-  using S = value_type::state_type;
-  auto const make = [](S s = S::zero) { return value_type { s }; };
-
-  enum outcome_type { nothrow, caught, bad_catch };
-
-  // Check value assignment for engaged optional
-
-  {
-    O o = make();
-    value_type v = make(S::throwing_copy);
-    o = v;
-    VERIFY( o && o->state == S::throwing_copy);
-  }
-
-  {
-    O o = make();
-    value_type v = make(S::throwing_move);
-    o = std::move(v);
-    VERIFY( o && o->state == S::throwing_move);
-  }
-
-  {
-    ATTRIBUTE_UNUSED outcome_type outcome {};
-    O o = make();
-    value_type v = make(S::throwing_copy_assignment);
-
-    try
-    {
-      o = v;
-    }
-    catch(exception const&)
-    { outcome = caught; }
-    catch(...)
-    { outcome = bad_catch; }
-
-    VERIFY( o && o->state == S::threw );
-  }
-
-  {
-    ATTRIBUTE_UNUSED outcome_type outcome {};
-    O o = make();
-    value_type v = make(S::throwing_move_assignment);
-
-    try
-    {
-      o = std::move(v);
-    }
-    catch(exception const&)
-    { outcome = caught; }
-    catch(...)
-    { outcome = bad_catch; }
-
-    VERIFY( o && o->state == S::threw );
-  }
-
-  VERIFY( counter == 0 );
-}
-
-} // namespace assign_4
diff --git a/gdb/unittests/optional/assignment/5.cc b/gdb/unittests/optional/assignment/5.cc
deleted file mode 100644
index 85016a2..0000000
--- a/gdb/unittests/optional/assignment/5.cc
+++ /dev/null
@@ -1,81 +0,0 @@
-// Copyright (C) 2013-2023 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.
-
-// You should have received a copy of the GNU General Public License along
-// with this library; see the file COPYING3.  If not see
-// <http://www.gnu.org/licenses/>.
-
-namespace assign_5 {
-
-static int counter = 0;
-
-struct mixin_counter
-{
-  mixin_counter() { ++counter; }
-  mixin_counter(mixin_counter const&) { ++counter; }
-  ~mixin_counter() { --counter; }
-};
-
-struct value_type : private mixin_counter { };
-
-static void
-test ()
-{
-  using O = gdb::optional<value_type>;
-
-  // Check std::nullopt_t and 'default' (= {}) assignment
-
-#ifndef GDB_OPTIONAL
-  {
-    O o;
-    o = std::nullopt;
-    VERIFY( !o );
-  }
-#endif
-
-#ifndef GDB_OPTIONAL
-  {
-    O o { gdb::in_place };
-    o = std::nullopt;
-    VERIFY( !o );
-  }
-#endif
-
-#ifndef GDB_OPTIONAL
-  {
-    O o;
-    o = {};
-    VERIFY( !o );
-  }
-#endif
-
-#ifndef GDB_OPTIONAL
-  {
-    O o { gdb::in_place };
-    o = {};
-    VERIFY( !o );
-  }
-#endif
-  {
-    gdb::optional<std::vector<int>> ovi{{1, 2, 3}};
-    VERIFY(ovi->size() == 3);
-    VERIFY((*ovi)[0] == 1 && (*ovi)[1] == 2 && (*ovi)[2] == 3);
-    ovi = {4, 5, 6, 7};
-    VERIFY(ovi->size() == 4);
-    VERIFY((*ovi)[0] == 4 && (*ovi)[1] == 5 &&
-	   (*ovi)[2] == 6 && (*ovi)[3] == 7);
-  }
-  VERIFY( counter == 0 );
-}
-
-} // namespace assign_5
diff --git a/gdb/unittests/optional/assignment/6.cc b/gdb/unittests/optional/assignment/6.cc
deleted file mode 100644
index d0ea95f..0000000
--- a/gdb/unittests/optional/assignment/6.cc
+++ /dev/null
@@ -1,91 +0,0 @@
-// Copyright (C) 2013-2023 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.
-
-// You should have received a copy of the GNU General Public License along
-// with this library; see the file COPYING3.  If not see
-// <http://www.gnu.org/licenses/>.
-
-namespace assign_6 {
-
-static int counter = 0;
-
-struct mixin_counter
-{
-  mixin_counter() { ++counter; }
-  mixin_counter(mixin_counter const&) { ++counter; }
-  ~mixin_counter() { --counter; }
-};
-
-struct value_type : private mixin_counter
-{
-  value_type() = default;
-  value_type(int) : state(1) { }
-  value_type(std::initializer_list<char>, const char*) : state(2) { }
-  int state = 0;
-};
-
-static void
-test ()
-{
-  using O = gdb::optional<value_type>;
-
-  // Check emplace
-
-  {
-    O o;
-    o.emplace();
-    VERIFY( o && o->state == 0 );
-  }
-  {
-    O o { gdb::in_place, 0 };
-    o.emplace();
-    VERIFY( o && o->state == 0 );
-  }
-
-  {
-    O o;
-    o.emplace(0);
-    VERIFY( o && o->state == 1 );
-  }
-  {
-    O o { gdb::in_place };
-    o.emplace(0);
-    VERIFY( o && o->state == 1 );
-  }
-
-#ifndef GDB_OPTIONAL
-  {
-    O o;
-    o.emplace({ 'a' }, "");
-    VERIFY( o && o->state == 2 );
-  }
-  {
-    O o { gdb::in_place };
-    o.emplace({ 'a' }, "");
-    VERIFY( o && o->state == 2 );
-  }
-#endif
-  {
-    O o;
-    VERIFY(&o.emplace(0) == &*o);
-#ifndef GDB_OPTIONAL
-    VERIFY(&o.emplace({ 'a' }, "") == &*o);
-#endif
-  }
-
-  static_assert( !std::is_constructible<O, std::initializer_list<int>, int>(), "" );
-
-  VERIFY( counter == 0 );
-}
-
-} // namespace assign_6
diff --git a/gdb/unittests/optional/assignment/7.cc b/gdb/unittests/optional/assignment/7.cc
deleted file mode 100644
index a9bd181..0000000
--- a/gdb/unittests/optional/assignment/7.cc
+++ /dev/null
@@ -1,30 +0,0 @@
-// Copyright (C) 2016-2023 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.
-
-// You should have received a copy of the GNU General Public License along
-// with this library; see the file COPYING3.  If not see
-// <http://www.gnu.org/licenses/>.
-
-namespace assign_7 {
-
-static void
-test ()
-{
-  gdb::optional<int> o{666};
-  VERIFY(o && *o == 666);
-  o.reset();
-  VERIFY(!o);
-  static_assert(noexcept(std::declval<gdb::optional<int>>().reset()), "");
-}
-
-} // namespace assign_7