README: clarify C++ (non/half-)compatibility of DG_dynarr.h

README.md

@@ -5,7 +5,7 @@ Some standalone source files that don't deserve their own repositories.
 | File                          | Description    |
 |-------------------------------|----------------|
 | [**DG_misc.h**](/DG_misc.h) | A public domain single-header C/C++ library with some useful functions to get the path/dir/name of the current executable and misc. string operations that are not available on all platforms - [***List of Functions***]( #list-of-functions-in-dg_misch) |
-| [**DG_dynarr.h**](/DG_dynarr.h) | A public domain single-header C/C++ library providing typesafe dynamic arrays for plain C, kinda like C++ std::vector. - [***Usage Example and List of Functions***]( #example-and-list-of-functions-for-dg_dynarrh) |
+| [**DG_dynarr.h**](/DG_dynarr.h) | A public domain single-header library providing typesafe dynamic arrays for *plain C*, kinda like C++ std::vector (works with C++, but only with "simple" types) - [***Usage Example and List of Functions***]( #example-and-list-of-functions-for-dg_dynarrh) |
 | [**SDL_stbimage.h**](/SDL_stbimage.h) | A public domain header-only C/C++ library for converting images to [SDL2](http://libsdl.org) `SDL_Surface*` using [stb_image.h](https://github.com/nothings/stb) - [***List of Functions***]( #list-of-functions-in-sdl_stbimageh) |
 | [**sdl2_scancode_to_dinput.h**](/sdl2_scancode_to_dinput.h) | One static C array that maps SDL2 scancodes to Direct Input keynums (values of those DIK_* constants) - also public domain. |
 | [**ImgToC.c**](/ImgToC.c) | Commandline tool converting images to .c files with a struct containing the image data. Same format as Gimp's "Export as .c" feature. Needs [stb_image.h](https://github.com/nothings/stb/) |
@@ -226,6 +226,12 @@ Notable exceptions are the value arguments (`v`) of `da_push()`, `da_set()`
 and `da_insert()`, so it's still ok to do `da_push(arr, fun_with_sideffects());`
 or `da_insert(a, 3, x++);`.
 
+This library is inteded to be used with ***plain C*** code, but it also works with *C++*; however you
+should only use it with "simple" types that can be moved around with `memcpy()`, i.e. don't
+require copy- or move-constructors or destructors to work correctly.
+So if you're writing C code that should also compile as C++ use this, but if you're
+writing "real" C++ code, use `std::vector` or something else instead.
+
 Furthermore, by default some sanity checks (like "is idx valid?") are done using
 assertions and by returning NULL/doing nothing on error if possible.  
 As this has some overhead, the behavior can be controlled with