What can human beings make out of the restrict qualifier?

Question

If I got the C99 restrict keyword right, qualifying a pointer with it is a promise made that the data it references won\'t be modified behind the compiler\'s back t

Answer 1

The best 'intuition' to have about the restrict keyword is that its a guarantee (by the programmer to the compiler) that, for the lifetime of the pointer, memory accessed via that pointer will ONLY be accessed via that pointer and not via another pointer or reference or global address. So its important that its on a pointer as its a property of both the pointer and the memory, tying the two together until the pointer goes out of scope.