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src/compat/assumptions.h
| Show First 20 Lines • Show All 48 Lines • ▼ Show 20 Lines | |||||
| // char, unsigned char, and std::byte (C++17) are the only "byte types" | // char, unsigned char, and std::byte (C++17) are the only "byte types" | ||||
| // according to the C++ Standard. "byte type" means a type that can be used to | // according to the C++ Standard. "byte type" means a type that can be used to | ||||
| // observe an object's value representation. We use uint8_t everywhere to see | // observe an object's value representation. We use uint8_t everywhere to see | ||||
| // bytes, so we have to ensure that uint8_t is an alias to a "byte type". | // bytes, so we have to ensure that uint8_t is an alias to a "byte type". | ||||
| // http://eel.is/c++draft/basic.types | // http://eel.is/c++draft/basic.types | ||||
| // http://eel.is/c++draft/basic.memobj#def:byte | // http://eel.is/c++draft/basic.memobj#def:byte | ||||
| // http://eel.is/c++draft/expr.sizeof#1 | // http://eel.is/c++draft/expr.sizeof#1 | ||||
| // http://eel.is/c++draft/cstdint#syn | // http://eel.is/c++draft/cstdint#syn | ||||
| static_assert(std::is_same<uint8_t, unsigned char>::value); | static_assert(std::is_same<uint8_t, unsigned char>::value, | ||||
| "uint8_t is an alias of unsigned char"); | |||||
| // Some important things we are NOT assuming (non-exhaustive list): | // Some important things we are NOT assuming (non-exhaustive list): | ||||
| // * We are NOT assuming a specific value for sizeof(std::size_t). | // * We are NOT assuming a specific value for sizeof(std::size_t). | ||||
| // * We are NOT assuming a specific value for std::endian::native. | // * We are NOT assuming a specific value for std::endian::native. | ||||
| // * We are NOT assuming a specific value for std::locale("").name(). | // * We are NOT assuming a specific value for std::locale("").name(). | ||||
| // * We are NOT assuming a specific value for | // * We are NOT assuming a specific value for | ||||
| // std::numeric_limits<char>::is_signed. | // std::numeric_limits<char>::is_signed. | ||||
| #endif // BITCOIN_COMPAT_ASSUMPTIONS_H | #endif // BITCOIN_COMPAT_ASSUMPTIONS_H | ||||