add Vector, a 1D container

[bernhardmgruber]

Addresses #296.

The implementation is not complete but contains a reasonably usable subset of what std::vector offers.

For the unit tests, I started with https://github.com/MFHava/PTL/blob/master/test/vector.cpp, but the current state is far different now. @MFHava would you consider the tests/vector.cpp in this PR still derived work from your original source? If yes, I would leave the license header as is and still need to add the Boost license file somewhere.

[MFHava]

@MFHava would you consider the tests/vector.cpp in this PR still derived work from your original source?

Skimming through your unit tests, I don't see anything that would necessitate that - is there even one line of code from me remaining? If there isn't, just go ahead and claim authorship...

[bernhardmgruber]

@MFHava would you consider the tests/vector.cpp in this PR still derived work from your original source?

Skimming through your unit tests, I don't see anything that would necessitate that - is there even one line of code from me remaining? If there isn't, just go ahead and claim authorship...

There is probably no line remaining unchanged. There are things like the default ctor check:

const ptl::vector<int> v0;
REQUIRE(v0.empty());

That became:

const Vector v;
CHECK(v.empty());

So there are a few lines left which carry on the idea. But the big portion is work of my own. Reading wikipedia on derivative work, which is by no means legal advice, but maybe a good guidance, it says:

a derivative work is an expressive creation that includes major copyrightable elements of an original, previously created first work

I therefore would like to conclude that my unit tests are not derivative work since close to zero elements were taken over. @MFHava is that assessment correct in your opinion?

[MFHava]

Yeah, just go ahead...