Resolve "Replace in c++17 removed std::unary_function and std::binary_function" (!511) · Merge requests · OPAL / src · GitLab

Resolve "Replace in c++17 removed std::unary_function and std::binary_function"

Closes #664 (closed)

The inheritance can simply be removed: https://stackoverflow.com/a/33115140/5453374

Edited Jul 06, 2021 by snuverink_j