Pointers and subscript pointers 1.0

The hnum class is a handle to a value class (uint8, double, etc). It acts like a pointer, but isn't really a pointer. Operating on an hnum class does not require "x = x + 1". Using "x+1" will permanantly modify it's value. Copying an hnum object only creates a copy to it's handle, and doesn't copy it's data. In the example "y = x", if x changes, y also changes.There are two subscripting modes for the hnum class. The default is 'normal'. In the normal mode, "a = x(1:3)" returns a value, not a handle. In the 'pointer' mode, "a = x(1:3)" returns a pointer to the first threeelements of x. This is a subscripthandle class. Modifying 'a' modifies the elements of 'x' that 'a' points to.Some things to tryx = hnum(magic(5),'pointer') %a magic square that returns pointers when subscripteda = x(5:7) %Creates a pointer to part of xa(:) = sin(a) %This changes some values of x. note: a = sin(a) returns a doublea(1:end) = 500 %Subscripting subscript handles is also validMost of the functions of both classes were generated using a macro function. This was done to save time, as there are 100+ functions to overload. Because of this, not all functions allow as many inputs as their builtin versions. Some of the builtin functions were left out because they needed more than 2 inputs. See the two files in the 'Macro' directory for more information.Watch out for memory leaks. Always delete an hnum object before replacing it.x = hnum(1)a = x(a)x = 5 % This does not delete what 'x' used to be. Use delete(x) before.a % 'a' keeps the previous x in memory even though you can't access it.

Requirements:	No special requirements
Platforms:	Matlab
Keyword:	1002b,  Function,  Generated,  Inputs,  Macro,  Overload
Users rating:	0/10