// Copyright 2021 The Tint Authors.
//
// 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 "src/tint/sem/reference.h"

#include "src/tint/program_builder.h"
#include "src/tint/utils/hash.h"

TINT_INSTANTIATE_TYPEINFO(tint::sem::Reference);

namespace tint::sem {

Reference::Reference(const Type* subtype,
                     ast::StorageClass storage_class,
                     ast::Access access)
    : subtype_(subtype), storage_class_(storage_class), access_(access) {
  TINT_ASSERT(Semantic, !subtype->Is<Reference>());
  TINT_ASSERT(Semantic, access != ast::Access::kUndefined);
}

size_t Reference::Hash() const {
  return utils::Hash(TypeInfo::Of<Reference>().full_hashcode, storage_class_,
                     subtype_, access_);
}

bool Reference::Equals(const sem::Type& other) const {
  if (auto* o = other.As<Reference>()) {
    return o->storage_class_ == storage_class_ && o->subtype_ == subtype_ &&
           o->access_ == access_;
  }
  return false;
}

std::string Reference::FriendlyName(const SymbolTable& symbols) const {
  std::ostringstream out;
  out << "ref<";
  if (storage_class_ != ast::StorageClass::kNone) {
    out << storage_class_ << ", ";
  }
  out << subtype_->FriendlyName(symbols) << ", " << access_;
  out << ">";
  return out.str();
}

Reference::Reference(Reference&&) = default;

Reference::~Reference() = default;

}  // namespace tint::sem