src/ast/variable.cc

// 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/ast/variable.h"

#include "src/ast/override_decoration.h"
#include "src/program_builder.h"
#include "src/sem/variable.h"

TINT_INSTANTIATE_TYPEINFO(tint::ast::Variable);

namespace tint {
namespace ast {

Variable::Variable(ProgramID program_id,
                   const Source& source,
                   const Symbol& sym,
                   StorageClass declared_storage_class,
                   Access declared_access,
                   const ast::Type* type,
                   bool is_const,
                   Expression* constructor,
                   DecorationList decorations)
    : Base(program_id, source),
      symbol_(sym),
      type_(type),
      is_const_(is_const),
      constructor_(constructor),
      decorations_(std::move(decorations)),
      declared_storage_class_(declared_storage_class),
      declared_access_(declared_access) {
  TINT_ASSERT(AST, symbol_.IsValid());
  TINT_ASSERT_PROGRAM_IDS_EQUAL_IF_VALID(AST, symbol_, program_id);
  TINT_ASSERT_PROGRAM_IDS_EQUAL_IF_VALID(AST, constructor, program_id);
}

Variable::Variable(Variable&&) = default;

Variable::~Variable() = default;

Variable::BindingPoint Variable::binding_point() const {
  GroupDecoration* group = nullptr;
  BindingDecoration* binding = nullptr;
  for (auto* deco : decorations()) {
    if (auto* g = deco->As<GroupDecoration>()) {
      group = g;
    } else if (auto* b = deco->As<BindingDecoration>()) {
      binding = b;
    }
  }
  return BindingPoint{group, binding};
}

Variable* Variable::Clone(CloneContext* ctx) const {
  auto src = ctx->Clone(source());
  auto sym = ctx->Clone(symbol());
  auto* ty = ctx->Clone(type());
  auto* ctor = ctx->Clone(constructor());
  auto decos = ctx->Clone(decorations());
  return ctx->dst->create<Variable>(src, sym, declared_storage_class(),
                                    declared_access(), ty, is_const_, ctor,
                                    decos);
}

}  // namespace ast
}  // namespace tint