namespace class class function 1 regular see-below implementation-defined dependency normal constructor conversion destructor struct class union normal typename enum none public protected private none constexpr consteval none extern static auto register namespace record function overloads enum enum-constant typedef variable guide namespace-alias using concept identifier specialization type constant template type constant template class typename none note tip important caution warning none in out inout unordered ordered none left center right admonition brief code heading paragraph list definition-list quote thematic-break footnote-definition table math param postcondition precondition returns see throws t-param reference copy-details link text soft-break line-break code emph strong image footnote-reference strikethrough math superscript subscript highlight