mrdocs::nullable_traits<Location>
nullable_traits specialization for Location.
Synopsis
Declared in <mrdocs/Metadata/Symbol/Location.hpp>
template<>
struct nullable_traits<Location>;Description
Semantics
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The “null” (sentinel) state is any Location whose ShortPath is empty.
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Creating a null value produces a Location with all fields defaulted and ShortPath empty.
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Making an existing value null clears ShortPath and resets the other fields to their defaults.
Rationale
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This mirrors the old LocationEmptyPredicate, which treated an empty ShortPath as “empty/null.”