TypePunning.h

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/*
 * Copyright 2017 MapD Technologies, Inc.
 *
 * 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.
 */

#ifndef QUERYENGINE_TYPEPUNNING_H
#define QUERYENGINE_TYPEPUNNING_H

#include "../Shared/funcannotations.h"

// Mark ptr as safe for type-punning operations. We need it whenever we want to
// interpret a sequence of bytes as float / double through a reinterpret_cast.

#ifdef _MSC_VER
template <class T>
FORCE_INLINE T* may_alias_ptr(T* ptr) {
  return ptr;
}
#else
template <class T>
    FORCE_INLINE T __attribute__((__may_alias__)) * may_alias_ptr(T* ptr) {
  return ptr;
}
#endif

#endif  // QUERYENGINE_TYPEPUNNING_H