entry.hpp File Reference

Compile-time Entry NTTP and the runtime-view TagValMetadata struct. More...

#include <commons/color.hpp>
#include <commons/fixed_string.hpp>
#include <commons/icon.hpp>
#include <optional>
#include <string_view>

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Classes
struct	tagval::Entry< Owner, Code, Label, Icon, Color >
	Compile-time entry. More...
struct	tagval::TagValMetadata
	Runtime view of an entry's metadata. More...

Namespaces
namespace	tagval

Functions
template<typename E >
constexpr std::string_view	tagval::label_or_code () noexcept
	If the user declared an empty label, fall back to the code so that label() never returns an empty string for a valid entry.
template<typename E >
constexpr TagValMetadata	tagval::metadata_of () noexcept

Variables
template<typename E >
constexpr TagValMetadata	tagval::metadata_v = metadata_of<E>()
	Pinned, per-entry TagValMetadata constant.

Detailed Description

Compile-time Entry NTTP and the runtime-view TagValMetadata struct.

Each user-declared struct Active : tagval::Entry<Status, "active", ...> {} is a distinct type. Per-kind storage (a static constexpr array for ClosedEnded, a Meyers-singleton vector for OpenEnded) materializes a TagValMetadata for every entry; handles store the address of the matching record inside that storage. Pointer equality on that address is value equality.