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Created attachment 942 [details]
a small program demonstrating the error

Hello!

While trying out SDL2 from HG (August 13th snapshot) on OSX, I discovered that g++ gives a compilation error when attempting to assign an int value to SDL_Scancode or to increment it with the ++ operator, as is done in the testkeys.c file. The same code compiles without complaint in gcc. This is, it seems, actually the correct behavior for both C and C++ according to their respective standards.

While somewhat of a minor issue, it would probably be good to find a way to make the behavior of SDL_Scancode variables (and other enum type variables in the codebase) identical whether the code they are used in is compiled with a C or C++ compiler.

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I have attached a small example file demonstrating the problem. Attempt to compile it with:

g++ main.cpp `sdl2-config --cflags --libs`

It should fail with errors like these:

main.cpp:16:17: error: invalid conversion from 'int' to 'SDL_Scancode' [-fpermissive]
main.cpp:16:52: error: no match for 'operator++' in '++scancode'

If you change the name of the file to main.c and compile with gcc, the file should compile without issue.