Here is a list of all documented namespace members with links to the namespaces they belong to:

### - d -

- data() : std
- dec() : std
- decay_t : std
- decimal32_to_long_long() : std::decimal
- declare_no_pointers() : std
- declare_reachable() : std
- declval() : std
- defaultfloat() : std
- defer_lock : std
- denorm_absent : std
- denorm_indeterminate : std
- denorm_present : std
- detected_or : std::experimental
- detected_or_t : std::experimental
- detected_t : std::experimental
- directory_options : std::filesystem
- distance() : __gnu_cxx, std
- duration_cast() : std::chrono
- dynamic_pointer_cast() : std