When I see the word fault-tolerant, C++ is not the best choice. Ada or, to a lesser extent, Rust remains at the forefront of fault-tolerant. The rule of thumb

When I see the word fault-tolerant, C++ is not the best choice. Ada or, to a lesser extent, Rust remains at the forefront of fault-tolerant. The rule of thumb for test suite is 4x the code-line being tested, way more test unit code-lines if in C++.