// Copyright 2020 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/type/alias_type.h"

#include <assert.h>

#include "src/clone_context.h"
#include "src/program_builder.h"

TINT_INSTANTIATE_CLASS_ID(tint::type::Alias);

namespace tint {
namespace type {

Alias::Alias(const Symbol& sym, Type* subtype)
    : symbol_(sym), subtype_(subtype) {
  assert(subtype_);
}

Alias::Alias(Alias&&) = default;

Alias::~Alias() = default;

std::string Alias::type_name() const {
  return "__alias_" + symbol_.to_str() + subtype_->type_name();
}

std::string Alias::FriendlyName(const SymbolTable& symbols) const {
  return symbols.NameFor(symbol_);
}

uint64_t Alias::MinBufferBindingSize(MemoryLayout mem_layout) const {
  return subtype_->MinBufferBindingSize(mem_layout);
}

uint64_t Alias::BaseAlignment(MemoryLayout mem_layout) const {
  return subtype_->BaseAlignment(mem_layout);
}

Alias* Alias::Clone(CloneContext* ctx) const {
  // Clone arguments outside of create() call to have deterministic ordering
  auto sym = ctx->Clone(symbol());
  auto* ty = ctx->Clone(type());
  return ctx->dst->create<Alias>(sym, ty);
}

}  // namespace type
}  // namespace tint