Functional C++ TODO list.

The little stuff goes here, to remind me to get around to it one day. The big stuff is still spinning around my head.

Documentation

rationale: immutability and sharing.
concepts: immutable types and value types, remove immutable.hpp.
terminology: strict, lazy, boxed, unboxed.
sum types: implicit and explicit tags.

Exception safety

noexcept specifications, std::move_if_noexcept where appropriate.
review and document exception-safety requirements and guarantees.

Namespace

move everything to namespace fp.