compile failed

[peer2peer]

Several errors while build in visual studio 2019:

1>D:\cpptest\num.hpp(230): error C2589: “(”:“::”

230 size_t i, na = a.size(), nb = b.size(), n = std::max(na, nb);

[Botje]

This is caused by an errant max macro from "windows.h". #undef max or #define NOMINMAX before including it.

[983]

I believe that the correct solution is to define NOMINMAX in the settings of your visual studio project. Adding fixes for every compiler in every file does not scale.

See https://stackoverflow.com/questions/4913922/possible-problems-with-nominmax-on-visual-c for further discussion and alternative fixes.