error C3872: '0xbb': this character is not allowed in an identifier - Building on windows with MSVC

[squee72564]

When building on windows with MSVC I get the following error:

...\black_hole\2D_lensing.cpp(20,31): error C3872: '0xbb': this character is not all
owed in an identifier [...\black_hole\build\BlackHole2D.vcxproj]

It is the lambda character "λ" that is found is some of the variable names.

According to the C++ standard I'm pretty sure that it is technically okay to have this, but maybe MSVC just doesn't allow it.

Maybe just change that character to "_lambda" or something in each case?

[ZackaryHoyt]

That should be a UTF-8 character which MSVC supports, but seems to require additional build flags to actually compile it. Otherwise agree that greek letters should be renamed.

[squee72564]

@ZackaryHoyt Yeah I looked and I think the standard supports it, didn't check the additional build flag though.

I did submit a new pull request to change it, along with a little more detailed build instructions for windows / mac / linux users.