René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"cpp_redis does not compile with MSVC in conformance mode or with C++20 ","articleBody":"When building cpp_redis with Microsoft Visual Studio and switching the permissive mode off (=conformance mode on) or switching the  language standard to C++20 (what implicitly enabled the conformacne mode), cpp_redis no longer compiles due to an error in optional.hpp when explanding __CPP_REDIS_LOG(1, \"value_or(U\u0026\u0026 v)\\n\") to cpp_redis::1(...)\r\nError\tC2589\t'constant': illegal token on right side of '::' \r\n\r\nThe reason is that MSVC by default sets the __cplusplus makro to 199711L even for newer language standards.\r\n\r\nThe solution is to either set an additional compiler option in the visual studio project: /Zc:__cplusplus or to update the line\r\n#if __cplusplus \u003e= 201703L in optional.hpp to also check for _MSVC_LANG ","author":{"url":"https://github.com/chriss5","@type":"Person","name":"chriss5"},"datePublished":"2023-10-27T08:37:06.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/122/cpp_redis/issues/122"}