Am Mi., 1. Mai 2024 um 13:36 Uhr schrieb Jean-Marc Lasgouttes: > Le 01/05/2024 à 13:32, Jean-Marc Lasgouttes a écrit : > > Le 01/05/2024 à 11:54, Yu Jin a écrit : > >> 2.4 compiles with c++20 standard. The Problem with 2.3 are the > >> "unary_function"s, which seem to require c++11(?) and as far as I can > >> see the current Visual Studio just can not do that, c++14 is minimum. > > > > Reading this: > > https://en.cppreference.com/w/cpp/utility/functional/unary_function > > I would think that it works with C++14 and was remove din C++17 only. > > Actually, the function is in <functional>, which is not included in > Format.cpp. > > > https://learn.microsoft.com/en-us/answers/questions/1348183/std-binary-function-is-missing-in-msvc-14-37-32822
You are right, simply adding #include <functional> to Format.cpp resolves the errors. -- Eugene
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