catch3/projects/SelfTest/UsageTests/ToStringOptional.tests.cpp, branch v2.9.2 Progmasoft Catch3: an independently maintained C++17 test framework with a parallel runner, property checks, snapshots and structured results. Add to string for std::optional 2019-01-31T14:35:13+00:00 Robin Moussu 2019-01-25T21:05:40+00:00 16dc2197046dd1362e26027e789f15d65275a185