Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Constructs a field_view
holding NULL.
constexpr field_view( std::nullptr_t);
Caution: field_view(NULL)
will not match this overload. It will
try to construct a string_view
from a NULL C string, causing undefined behavior.
No-throw guarantee.
Results in a field_view
with value semantics (always valid).