3 ms·

Once the point is home, you can drive it a little bit more by exploiting the fact that string literals can be converted to pointers to the first characters, and

• deleted 5y ago
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• deleted 5y ago
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• danielozcpp 5y ago
  int const* const x; // C int const& x; // C++ A reference is functionally equivalent to a const pointer. (Reference reassignment is disallowed. Likewise, you cannot reassign a const pointer. A const pointer is meant to keep its pointee [address].) The difference between them is that C++ const references also allow non-lvalue arguments (temporaries). It is much easier to read from right to left when decoding types. Look for yourself: - double (* const convert_to_deg)(double const x) // const pointer to function taking a const double and returning double - int const (* ptr_to_arr)[42]; // pointer to array of 42 const ints - int const * arr_of_ptrs[42]; // array of 42 pointers to const ints - int fun_returning_array_of_ints()[42]; Try it out yourself: https://cdecl.org/ https://cdecl.org/ Hence, I am an "East conster". (Many people are "West consters" though.) You can return function pointers: typedef struct player_t player_t; // let it be opaque ;) int game_strategy1(player_t const * const p) { /* Eliminate player */ return 666; } int game_strategy2(player_t const * const p) { /* Follow player */ return 007; } int (* const game_strategy(int const strategy_to_use))(player_t const * const p) { if (strategy_to_use == 0) return &game_strategy1; return &game_strategy2; } Functional programming = immutable (const) values + pure functions (no side effects). Consting for me is also a form of documentation/specification. "East const" for life! :)
  • harry8 5y ago
    10 or 42?
    • danielozcpp 5y ago
      Thank you. 42. I edited my comment above.