id summary reporter owner description type status milestone component version severity resolution keywords cc 13434 index_args_default_compare uses result_type gast128@… Joaquín M López Muñoz "I was trying to build with 'ISO C++17 Standard (/std:c++17)' mode in Visual Studio 2017 which removes unary_function and binary_function. Unfortunately index_args_default_compare gives then errors due to its dependency on result_type." Bugs closed To Be Determined multi_index Boost 1.65.0 Problem invalid