add support of internal partitions

[Arthapz]

No description provided.

[Arthapz]

the

{values = {["internalpartition"] = true}}

is for fallback generator, compiler implementing p1689r5 should handle it (msvc does)

[waruqi]

the

{values = {["internalpartition"] = true}}

is for fallback generator, compiler implementing p1689r5 should handle it (msvc does)

Is there a better way to detect it automatically? For example by analysing the module source code.

[Arthapz]

it's possible i think, but i think it will complexifies a the code, i'll see if i can do something simple