Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 123]

Nsimdutf	Helpers placed in namespace detail are not a part of the public API
Ndetail
Cconstexpr_ptr	The constexpr_ptr class is a workaround for reinterpret_cast not being allowed during constant evaluation
Cconstexpr_write_ptr_proxy	Helper type for constexpr_writeptr, so it is possible to do "*ptr = val;"
Cconstexpr_write_ptr	Helper for working around reinterpret_cast not being allowed during constexpr evaluation
Cresult
Cfull_result
Cutf8_result
Cutf8_to_utf16_result
Cimplementation	An implementation of simdutf for a particular CPU architecture
Csimdutf_full_result
Csimdutf_result
Csimdutf_utf8_result
Csimdutf_utf8_to_utf16_result