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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <cstdint>
#include "base/memory/raw_ptr.h"
struct RawPtrWrapper {
raw_ptr<int> ptr;
};
struct RawPtrWrapperSub : RawPtrWrapper {};
void VariousCasting() {
raw_ptr<int> ptr;
RawPtrWrapper wrapped;
RawPtrWrapper arr[10];
void* void_ptr = nullptr;
// CK_BitCast should emit an error.
(void)reinterpret_cast<RawPtrWrapper*>(void_ptr);
// CK_LValueBitCast should emit an error.
RawPtrWrapper& ref = wrapped;
ref = reinterpret_cast<RawPtrWrapper&>(void_ptr);
// CK_LValueToRValueBitCast should emit an error.
(void)__builtin_bit_cast(int*, ptr);
(void)__builtin_bit_cast(raw_ptr<int>, wrapped);
(void)__builtin_bit_cast(int*, wrapped);
// CK_PointerToIntegral should emit an error.
uintptr_t i = reinterpret_cast<uintptr_t>(&wrapped);
// CK_IntegralToPointer should emit an error.
wrapped = *reinterpret_cast<RawPtrWrapper*>(i);
// CK_ArrayToPointerDecay should be safe.
(void)static_cast<RawPtrWrapper*>(arr);
// This line has two casts, CK_ArrayToPointerDecay and CK_BitCast.
// q = (void*) (RawPtrWrapper*) arr;
// The latter should emit an error.
void_ptr = arr;
// CK_BaseToDerived should be safe.
RawPtrWrapperSub* sub = static_cast<RawPtrWrapperSub*>(&wrapped);
// CK_DerivedToBase should be safe.
wrapped = *static_cast<RawPtrWrapper*>(sub);
// CK_ToVoid should be safe.
(void)&wrapped;
// Illegal casts: should be disallowed by the compiler.
(void)static_cast<int*>(ptr);
(void)static_cast<raw_ptr<int>>(wrapped);
(void)static_cast<int*>(wrapped);
(void)reinterpret_cast<int*>(ptr);
(void)reinterpret_cast<raw_ptr<int>>(wrapped);
(void)reinterpret_cast<int*>(wrapped);
}
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