I tend to write C++ in a sort of limited SSA form a lot of the time: almost all local variables and parameters const, class members all initialized in the const

I tend to write C++ in a sort of limited SSA form a lot of the time: almost all local variables and parameters const, class members all initialized in the constructor initializer list, mutation confined to small functions or lambdas. If you're not familiar with const in C++, using it for locals and parameters gives you compiler checking that you're not modifying variables after assignment. This is one of the biggest things I miss from C++ when writing C#. Containers can make things a bit trickier but using algorithms and confining most mutation to helper functions makes it doable a lot of the time. The new ranges library being standardized for C++ 20 makes it more convenient to use containers in this style.