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types (but not between a function pointer and an object pointer). A special pointer type called the “void pointer” allows pointing to any (non-function)...

others) void * acts roughly like a universal or top type. A program can convert a pointer to any type of data (except a function pointer) to a pointer to void...

Dangling pointers and wild pointers in computer programming are pointers that do not point to a valid object of the appropriate type. These are special...

expressed as ((void *)0), the integer value 0 converted to the type void* (see pointer to void type). The C standard does not say that the null pointer is the...

returning a pointer to an array. void h()(); // Error: function returning a function void (*k())(); // OK: function returning a function pointer If there...

computer programming, an opaque pointer is a special case of an opaque data type, a data type declared to be a pointer to a record or data structure of...

machine addresses to pointers. Procedures (subroutines not returning values) are a special case of function, with an empty return type void. Memory can be allocated...

A function pointer, also called a subroutine pointer or procedure pointer, is a pointer referencing executable code, rather than data. Dereferencing the...

typedef void (*TMyFunctionPointer)( void ); In a similar way, a typedef can be declared for a pointer to a method using this syntax: typedef void (__closure...

result of dlsym() is a void pointer. However, a function pointer is not required to even have the same size as a data object pointer, and therefore a valid...

pointers to pointers: int **ptr; // a pointer to a pointer to ints int const **ptr // a pointer to a pointer to constant int value // (not a pointer to...

native functions allowing code to load a library by name and retrieve a pointer to a function within that library, and uses libffi library to invoke it...

function returns an untyped pointer (type void *), which the calling code must explicitly or implicitly cast to the appropriate pointer type. Pre-standardized...

value of zero is used to indicate a null pointer: void optionally_return_a_value (int* optional_return_value_pointer) { /* ... */ int value_to_return = 1;...

will have null or void values. In object-oriented languages, access to objects is achieved through references (or, equivalently, pointers). A typical call...

here Function pointers are invoked by name just like normal function calls. Function pointers are separate from pointers and void pointers. The aforementioned...

evaluate pointer as false, as pointer is a null pointer and does not point to a valid memory location: #include <assert.h> int main() { void* pointer = 0;...

typed". However, the use of the generic pointer, the void* pointer, does allow casting pointers to other pointers without needing to do an explicit cast...

C being more weakly-typed regarding pointers. Specifically, C allows a void* pointer to be assigned to any pointer type without a cast, while C++ does...

uninitialized pointer (wild pointer, which points to a random memory address) Dereferencing or assigning to a freed pointer (dangling pointer, which points to memory...