// Copyright (c) 2018, NVIDIA CORPORATION.  All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "attr.h"
#include "../common/idioms.h"
#include <ostream>
#include <stddef.h>

namespace Fortran::semantics {

void Attrs::CheckValid(const Attrs &allowed) const {
  if (!allowed.HasAll(*this)) {
    common::die("invalid attribute");
  }
}

std::string AttrToString(Attr attr) {
  switch (attr) {
  case Attr::BIND_C: return "BIND(C)";
  case Attr::INTENT_IN: return "INTENT(IN)";
  case Attr::INTENT_INOUT: return "INTENT(INOUT)";
  case Attr::INTENT_OUT: return "INTENT(OUT)";
  default: return EnumToString(attr);
  }
}

std::ostream &operator<<(std::ostream &o, Attr attr) {
  return o << AttrToString(attr);
}

std::ostream &operator<<(std::ostream &o, const Attrs &attrs) {
  std::size_t n{attrs.count()};
  std::size_t seen{0};
  for (std::size_t j{0}; seen < n; ++j) {
    Attr attr{static_cast<Attr>(j)};
    if (attrs.test(attr)) {
      if (seen > 0) {
        o << ", ";
      }
      o << attr;
      ++seen;
    }
  }
  return o;
}
}