// 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/expression.h"

#include <assert.h>

#include "src/ast/array_accessor_expression.h"
#include "src/ast/binary_expression.h"
#include "src/ast/bitcast_expression.h"
#include "src/ast/call_expression.h"
#include "src/ast/constructor_expression.h"
#include "src/ast/identifier_expression.h"
#include "src/ast/member_accessor_expression.h"
#include "src/ast/type/alias_type.h"
#include "src/ast/unary_op_expression.h"

namespace tint {
namespace ast {

Expression::Expression() = default;

Expression::Expression(const Source& source) : Node(source) {}

Expression::~Expression() = default;

void Expression::set_result_type(type::Type* type) {
  // The expression result should never be an alias type
  result_type_ = type->UnwrapAliasesIfNeeded();
}

bool Expression::IsArrayAccessor() const {
  return false;
}

bool Expression::IsBitcast() const {
  return false;
}

bool Expression::IsCall() const {
  return false;
}

bool Expression::IsIdentifier() const {
  return false;
}

bool Expression::IsConstructor() const {
  return false;
}

bool Expression::IsMemberAccessor() const {
  return false;
}

bool Expression::IsBinary() const {
  return false;
}

bool Expression::IsUnaryOp() const {
  return false;
}
const ArrayAccessorExpression* Expression::AsArrayAccessor() const {
  assert(IsArrayAccessor());
  return static_cast<const ArrayAccessorExpression*>(this);
}

const BitcastExpression* Expression::AsBitcast() const {
  assert(IsBitcast());
  return static_cast<const BitcastExpression*>(this);
}

const BinaryExpression* Expression::AsBinary() const {
  assert(IsBinary());
  return static_cast<const BinaryExpression*>(this);
}

const CallExpression* Expression::AsCall() const {
  assert(IsCall());
  return static_cast<const CallExpression*>(this);
}

const ConstructorExpression* Expression::AsConstructor() const {
  assert(IsConstructor());
  return static_cast<const ConstructorExpression*>(this);
}

const IdentifierExpression* Expression::AsIdentifier() const {
  assert(IsIdentifier());
  return static_cast<const IdentifierExpression*>(this);
}

const MemberAccessorExpression* Expression::AsMemberAccessor() const {
  assert(IsMemberAccessor());
  return static_cast<const MemberAccessorExpression*>(this);
}

const UnaryOpExpression* Expression::AsUnaryOp() const {
  assert(IsUnaryOp());
  return static_cast<const UnaryOpExpression*>(this);
}

ArrayAccessorExpression* Expression::AsArrayAccessor() {
  assert(IsArrayAccessor());
  return static_cast<ArrayAccessorExpression*>(this);
}

BitcastExpression* Expression::AsBitcast() {
  assert(IsBitcast());
  return static_cast<BitcastExpression*>(this);
}

BinaryExpression* Expression::AsBinary() {
  assert(IsBinary());
  return static_cast<BinaryExpression*>(this);
}

CallExpression* Expression::AsCall() {
  assert(IsCall());
  return static_cast<CallExpression*>(this);
}

ConstructorExpression* Expression::AsConstructor() {
  assert(IsConstructor());
  return static_cast<ConstructorExpression*>(this);
}

IdentifierExpression* Expression::AsIdentifier() {
  assert(IsIdentifier());
  return static_cast<IdentifierExpression*>(this);
}

MemberAccessorExpression* Expression::AsMemberAccessor() {
  assert(IsMemberAccessor());
  return static_cast<MemberAccessorExpression*>(this);
}

UnaryOpExpression* Expression::AsUnaryOp() {
  assert(IsUnaryOp());
  return static_cast<UnaryOpExpression*>(this);
}

}  // namespace ast
}  // namespace tint