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crypto-chassis
Failed to specialize function template 'unknown-type date::parse
On Windows (MSVC) get this error during compile
ccapi_util_private.h:278: Error: C2893: Failed to specialize function template 'unknown-type date::parse(const std::basic_string<CharT,Traits,Alloc> &,Parsable &)'
......\contrib\ccapi_cpp/ccapi_date.h(5506): note: see declaration of 'date::parse'
......\contrib\ccapi_cpp/ccapi_util_private.h(278): note: With the following template arguments:
......\contrib\ccapi_cpp/ccapi_util_private.h(278): note: 'Parsable=ccapi::TimePoint'
......\contrib\ccapi_cpp/ccapi_util_private.h(278): note: 'CharT=char'
......\contrib\ccapi_cpp/ccapi_util_private.h(278): note: 'Traits=std::char_traits
Hi, kv-gits, thank you for reaching us. This issue is known to us: https://github.com/crypto-chassis/ccapi/issues/85. However, recently we're in the process of ramping up production of our proprietary market making currently operating at a trading volume of $550M per week to the next new level for a trading firm. Therefore there's little time left for us to figure out issues here, plus none of us uses Windows. If you are willing to make a pull request to fix it, I'd be more than glad to accept it. Otherwise, for a short term workaround, you can try MinGW which has always been made sure to pass the CI: https://github.com/crypto-chassis/ccapi/runs/4660875789?check_suite_focus=true. We apologize.
Hi kv-gits. I found the root cause of the issue. The reason of this error is that new Visual Studio IDE comes with chrono which contains from_stream template functions. During compilation the compiler is confused and doesn't know which version to use (the one defined in ccapi_date.h or in chrono header). This issue appears while compiling using C++20 standard (and will in case of newer standards in the future most probably). To solve this issue the from_stream in ccapi_date.h file must be either renamed (and eventually renamed in all places where it occurs in ccapi project) or placed in a namespace or excluded from compilation while using newer (at least C++20) standard or... (any other valid approach).
Noted. Thank you very much for providing the details. We are working on devising a best approach to solve it soon. WIP: https://github.com/crypto-chassis/ccapi/pull/395