Check that all the settings are actually available.

[S-Dafarra]

As it can be noticed from the osqp code some settings may not be available depending on the specific Cmake settings. With this PR we copy the same checks adding an error message in case some settings are not available.

I also added the time_limit setting (see #38).

In draft since I have to bump the version number, but there are other PR open at the moment.

[S-Dafarra]

Rebased and bumped patch version. Removed from draft.

[GiulioRomualdi]

Should we use a static_assert if the variable is not defined?

[S-Dafarra]

Should we use a static_assert if the variable is not defined?

I totally missed this 😁. The point of adding the error instead of the assert is that code would work anyway even if you are trying to use that quantity. With the static_assert the code would not compile even if I don't call that method at all right?

[GiulioRomualdi]

Should we use a static_assert if the variable is not defined?

I totally missed this . The point of adding the error instead of the assert is that code would work anyway even if you are trying to use that quantity. With the static_assert the code would not compile even if I don't call that method at all right?

Right

[S-Dafarra]

Right

If we would use c++17 it would be easier to add it I guess, but I would avoid adding it for the moment. Let me rebase on top of devel though.

[GiulioRomualdi]

Merging!