Deprecate Version and Switches directives?

[erkyrath]

These cause headaches by changing compilation mode in mid-compile. Some switches are marked "...can't be set with 'Switches'" but we've never reviewed them to see which ones are really safe to use that way.

(This came up because of #146 . Switching Z-machine version in mid-compile now causes problems because the DICT_ENTRY_BYTES constant has to be redefined. There are probably other long-standing corner cases.)

Most of the use cases for these directives are now covered by the header-comment feature. (Put !% -v3 or a similar switch option at the top of the source file.) There's the possibility of switching various trace/debug options on and off in mid-compile, but I don't think that's very important. It will also get nerfed anyway when #103 goes in.

I don't propose removing these directives, but I would like to mark them "permanently deprecated" and say that bugs resulting from them may be DONOTFIXed.

[erkyrath]

Version is already described in the DM4 as "obsolete or for compiler maintenance only".

[curiousdannii]

Switches can be useful in I7 to, for example, output the memory map at the end. But if it's just depreciated that will still work. Changing version in the middle is madness though.

[erkyrath]

This is cheesy, but it works:

Include (-!% -z
-) before "Output.i6t";

(The spacing and line breaks have to be exact, though.)

[erkyrath]

The above hack doesn't work in I7 10.x. I am going to propose a more general header-directive-pragma for I7, once #189 is solidified.