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#pragma once
// attr.hpp - Attributes.
//
// Copyright © 2013-2014 Ben Longbons <b.r.longbons@gmail.com>
//
// This file is part of The Mana World (Athena server)
//
// 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/>.
#include "fwd.hpp"
namespace tmwa
{
#ifdef __clang__
# define FALLTHROUGH [[clang::fallthrough]]
#else
# define FALLTHROUGH /* fallthrough */
#endif
#define JOIN(a, b) a##b
// first loop:
// declare flag 'guard' (initially true)
// declare flag 'broken' (initially false)
// condition is 'guard' must be true, which is the case only for the first iteration
// post checks 'broken' and if set, break the loop
// second loop:
// declare public 'var' variable
// condition is that 'guard' must be true
// post sets 'guard' to false to make this loop run only once
// third loop:
// enable broken flag; it will remain set if 'break' is in the loop
// condition is that 'broken' must be true
// post sets 'broken' to false, which then fails the condition
// if user has a 'break' inside, then 'broken' will be true
// in either case, go back to the second loop's post
#define WITH_VAR_INLOOP(ty, var, expr) \
for (bool JOIN(var, _guard) = true, JOIN(var, _broken) = false; JOIN(var, _guard); ({if (JOIN(var, _broken)) { break; } })) \
for (ty var = expr; JOIN(var, _guard); JOIN(var, _guard) = false) \
for (JOIN(var, _broken) = true; JOIN(var, _broken); JOIN(var, _broken) = false)
#define WITH_VAR_NOLOOP(ty, var, expr) \
for (bool JOIN(var, _guard) = true, JOIN(var, _broken) = false; JOIN(var, _guard); ({if (JOIN(var, _broken)) {abort();} })) \
for (ty var = expr; JOIN(var, _guard); JOIN(var, _guard) = false) \
for (JOIN(var, _broken) = true; JOIN(var, _broken); JOIN(var, _broken) = false)
} // namespace tmwa
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