![]() When using pointers in structures, the '*' has to be omitted when using the field, once more to ease API code porting. This means that a willĪllocate an array from 0 to 1 where Dim a (2 ) will allocate an array from 0 to 2. To be conform to the C/C structure format (to allow direct API structure porting). Please note, that in structures a static array doesn't behave like the normal BASIC array (defined using Dim) SizeOf can be used with structures to get the size of the structure and OffsetOf can be used to retrieve The special value #PB_Structure_AlignC can be used to align the structureĪs it would be done in language C, useful when importing C structures to use with API functions. ![]() It can help to get more performance while accessing structure fields, but it can use more memory, as some spaceīetween each fields will be wasted. For example, if the alignment is set to 4, every field offset will be on a 4 byte boundary. The optional Align parameter allows to adjust alignment between every structure field. This is useful to do basic inheritance of structures.įor advanced users only. All fieldsįound in the extended structure will be available in the new structure and will be placed before The optional Extends parameter allows to extends another structure with new fields. It's possible to perform a full structure copy by using the equal affectation between two structure element of the same type. It is also possible to initialize a structure in memory withĬlearStructure() and reinitialize it with Memory structure with AllocateStructure() and free it with FreeStructure(). However, advanced users will be able to allocate a Generally, structures are used in association with a variable, an To declare such field, use the following keywords: When the object using the structure is created. Integer (.i), Float (.f ), Quad (.q), Double (.d)), String (.s) and Fixed String (.s).ĭynamic objects like arrays, lists and maps are also supported inside structure and are automatically initialized Structure fields must have an explicit type among all Basic Types supportedīy PureBasic, i.e. Statics arrays are supported inside structures. Structures fields are accessed with the \ option. It is very useful as you can group into the same To enable faster and easier handling of data files. (no pointers, no dynamic content, etc.Structure is useful to define user type, and access some OS memory areas. I'm just saying that without some form of garbage collection this will be a pain in the ass to implement and it would be restricted to a static structure. Then again Fred is a smart chap so who knows what he might come up with. I guess one "could" add a FreeReturnStructure() to clean things up, but that's really no different than allocating normally or passing a pre-allocated structure to a function. I'm sure Fred or Freak can point out why it would be a bad idea to allow returning a normal structure just like that, and why returning strings is not really the same thing.Įven MicroSoft passes the return structure as a pointer to a pointer in the function parameter,Įxcept for the cases when you have to free_something() on a returned handle. ![]() The idea itself isn't bad, it's just that you couldn't pass a normal structure, the returned structure would have to be limited in some way, maybe a "." structure? I have no idea really how to solve that in a nice practical way. Obviously it's kinda stupid to return a struct like that,īut this is people we are talking about, you just KNOW somebody will end up doing that.Īnd restricting the compiler and debugger to spit out warnings will generate the usual "Why can't PureBasic do this? It works fine with this type of structure".
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