C Void Pointer Alternative

In c void represents the absence of type.

C void pointer alternative. The void pointer also known as the generic pointer is a special type of pointer that can be pointed at objects of any data type a void pointer is declared like a normal pointer using the void keyword as the pointer s type. For example void pointer void ptr. Thanks for kaz for the suggestion. See the c faqs for the proper use of member function pointer.

The void pointer or void is supported in ansi c and c as a generic pointer type. Active 11 years 6 months ago. Valid code ptr d. If you are interested in using generic lambdas you can read my blog post that explains how to use them in sycl device code with practical examples.

Here is one example where use of member function pointer within a class as an implementation detail is perfectly acceptable if one works with performance sensitive code for different cpu architectures. This gives void pointers a great. Viewed 8k times 7. Therefore void pointers are pointers that point to a value that has no type and thus also an undetermined length and undetermined dereferencing properties.

Note that the above program compiles in c but doesn t compile in c. Thank you so. C alternatives to void pointers that isn t templates ask question asked 11 years 6 months ago. The void pointer in c is a pointer which is not associated with any data types.

In c we must explicitly typecast return value of malloc to int. The void type of pointer is a special type of pointer. It requires a different syntax than static function pointers. We mentioned lambdas as an alternative to function pointers in the first section and they were introduced in c 11 with more improvements for c 14 including the addition of generic lambdas.

2 void pointers in c are used to implement generic functions in c. For example compare function which is used in qsort. A pointer to void can store the address of any object not function and in c is implicitly converted to any other object pointer type on assignment but it must be explicitly cast if dereferenced. The void pointer is a generic pointer that is used when we don t know the data type of the variable that the pointer points to.

Double d 9 0. 1 void pointers cannot be. As a brief i think that template alias combined with variadic templates is a good nice neat and modern c alternative to raw function pointers this alias still are function pointers after all but std function is good nice neat and modern c as well with good advantages to take into account. It is also called general purpose pointer.