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    <blockquote> <p>The reinterpret_cast as we know can cast any non-standard pointer to another non-standard pointer.</p> </blockquote> <p>Almost, but not exactly. For example, you can't use reinterpret_cast to cast a <code>const int*</code> to an <code>int*</code>. For that, you need <code>const_cast</code>.</p> <blockquote> <p>How does reinterpret_cast work, What is the magic(the internal implementation) that allows reinterpret_cast to work?</p> </blockquote> <p>There's no magic at all. Ultimately, all data is just bytes. The C++ type system is merely an abstraction layer which tells the compiler how to "interpret" each byte. A <code>reinterpret_cast</code> is similar to a plain C-cast, in that it simply says "to hell with the type system: interpret these bytes as type X instead of type Y!"</p> <blockquote> <p>How to ensure safety when using reinterpret_cast? As far as i know, it doesn't guarantee of safe casting, So what precaution to take while using reinterpret_cast?</p> </blockquote> <p>Well, <code>reinterpret_cast</code> is inherently dangerous. You shouldn't use it unless you really know what you're doing. Try to use <code>static_cast</code> instead. The C++ type system will protect you from doing anything too dangerous if you use <code>static_cast</code>.</p> <blockquote> <p>What is the practical usage of this operator. I have not really encountered it in my professional programing experience, wherein I could'nt get around without using this operator.Any practical examples apart from usual int* to char* will be highly helpful and appreciated.</p> </blockquote> <p>It has many uses, but usually these uses are somewhat "advanced". For example, if you are creating a memory pool of linked blocks, and storing pointers to free blocks on the blocks themselves, you'll need to <code>reinterpret_cast</code> a block from a <code>T*</code> to a <code>T**</code> to interpret the block as a pointer to the next block, rather than a block itself.</p>
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    1. POFew doubts about casting operators in C++
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    1. USCharles Salvia
    1. USCharles Salvia
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    1. COYou're second paragraph is wrong. `reinterpret_cast` may or may not change the representation (Standard 5.2.10/3), and the mapping is purely implementation-defined. Consider C casting of `int` to `double` compared to casting of `int *` to `int`.
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      1. USDavid Thornley
    2. CONope. A reinterpret_cast is not like a C-cast.
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      1. USCrazy Eddie
    3. COThe primary difference is that reinterpret_cast won't cast away constness, which I noted. Other than that, saying that reinterpret_cast cast is similar to a plain C-cast, in the sense that you can simply "reinterpret" a bit-pattern as a different type when casting a pointer type to another pointer type, seems perfectly valid. The differences are subtle enough that using the word "similar" is fine here. Even though the C++ standard allows implementations to alter the bit-pattern on a reinterpret_cast, ultimately, casting between two unrelated types is just as dangerous either way.
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      1. USCharles Salvia
 

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