binutils-gdb/gdb/common/underlying.h

/* Copyright (C) 2017-2018 Free Software Foundation, Inc.

   This file is part of GDB.

   This program 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 of the License, or
   (at your option) any later version.

   This program 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 program.  If not, see <http://www.gnu.org/licenses/>.  */

#ifndef COMMON_UNDERLYING_H
#define COMMON_UNDERLYING_H

#include <type_traits>

/* Convert an enum to its underlying value.  */

template<typename E>
constexpr typename std::underlying_type<E>::type
to_underlying (E val) noexcept
{
  return static_cast<typename std::underlying_type<E>::type> (val);
}

#endif
Update copyright year range in all GDB files gdb/ChangeLog: Update copyright year range in all GDB files 2018-01-01 12:43:02 +08:00			`/* Copyright (C) 2017-2018 Free Software Foundation, Inc.`
dwarf2read.c: Make dir_index and file_name_index strong typedefs This should help catch mistakes related to mixing the 1-based DWARF indexes with 0-based std::vector indexes, since the new types do not implicitly convert to anything. The change in read_formatted_entries relates to the fact that doing the seemingly simpler: - uintp = &fe.dir_index; + uintp = (unsigned int ) &fe.dir_index; would be undefined C/C++. So to address that, I made the function extract the form before assigning to the file_entry. It felt natural to use gdb::optional for "do I have this value", and this is what motivated the previous patch that added the missing observer methods to gdb::optional. gdb/ChangeLog: 2017-04-04 Pedro Alves <palves@redhat.com> common/underlying.h: New file. * dwarf2read.c: Include "common/gdb_optional.h" and "common/underlying.h". (dir_index, file_name_index): New types. (file_entry): Use them. (file_entry::include): Use to_underlying. (line_header::add_file_name): Use dir_index. (read_formatted_entries): Use gdb::optional. Read form before writting to file_entry. (dwarf_decode_line_header): Use dir_index. (lnp_state_machine::current_file): Use to_underlying. (lnp_state_machine::file): Change type to file_name_index. (dwarf_record_line): Use to_underlying. (init_lnp_state_machine): Use file_name_index. (dwarf_decode_lines_1): Use dir_index and file_name_index. 2017-04-05 03:03:25 +08:00
			`This file is part of GDB.`

			`This program 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 of the License, or`
			`(at your option) any later version.`

			`This program 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 program. If not, see <http://www.gnu.org/licenses/>. */`

			`#ifndef COMMON_UNDERLYING_H`
			`#define COMMON_UNDERLYING_H`

			`#include <type_traits>`

			`/* Convert an enum to its underlying value. */`

			`template<typename E>`
			`constexpr typename std::underlying_type<E>::type`
			`to_underlying (E val) noexcept`
			`{`
			`return static_cast<typename std::underlying_type<E>::type> (val);`
			`}`

			`#endif`