15 #include <string_view>
16 #include <type_traits>
18 #include "pqxx/types.hxx"
37 class zview :
public std::string_view
40 constexpr
zview() noexcept = default;
43 constexpr
zview(
char const text[], std::ptrdiff_t len) noexcept(
44 noexcept(std::string_view{
text,
static_cast<std::size_t
>(len)})) :
45 std::string_view{
text,
static_cast<std::size_t
>(len)}
49 constexpr
zview(
char text[], std::ptrdiff_t len) noexcept(
50 noexcept(std::string_view{
text,
static_cast<std::size_t
>(len)})) :
51 std::string_view{
text, static_cast<std::size_t>(len)}
55 explicit constexpr
zview(std::string_view other) noexcept :
56 std::string_view{other}
62 template<
typename... Args>
63 explicit constexpr
zview(Args &&...args) :
64 std::string_view(std::forward<Args>(args)...)
69 zview(std::string
const &str) noexcept :
70 std::string_view{str.c_str(), str.size()}
78 constexpr
zview(
char const str[]) noexcept(noexcept(std::string_view{str})) :
92 constexpr
zview(
char const (&literal)[size]) :
zview(literal, size - 1)
96 [[nodiscard]] constexpr
char const *
c_str() const & noexcept
111 constexpr
zview operator"" _zv(
char const str[], std::size_t len) noexcept
113 return zview{str, len};
118 #if defined(PQXX_HAVE_CONCEPTS)
120 template<>
inline constexpr
bool std::ranges::enable_view<pqxx::zview>{
true};
125 inline constexpr
bool std::ranges::enable_borrowed_range<pqxx::zview>{
true};
135 concept ZString = std::is_convertible_v<strip_t<T>,
char const *> or
136 std::is_convertible_v<strip_t<T>, zview> or
137 std::is_convertible_v<T, std::string const &>;
145 inline constexpr
char const *
as_c_string(
char const str[]) noexcept
150 template<std::
size_t N>
The home of all libpqxx classes, functions, templates, etc.
Definition: array.hxx:33
Internal items for libpqxx' own use. Do not use these yourself.
Definition: composite.hxx:84
constexpr char const * as_c_string(char const str[]) noexcept
Get a raw C string pointer.
Definition: zview.hxx:145
Marker-type wrapper: zero-terminated std::string_view.
Definition: zview.hxx:38
constexpr zview(char const (&literal)[size])
Construct a zview from a string literal.
Definition: zview.hxx:92
constexpr char const * c_str() const &noexcept
Either a null pointer, or a zero-terminated text buffer.
Definition: zview.hxx:96
constexpr zview(Args &&...args)
Construct from any initialiser you might use for std::string_view.
Definition: zview.hxx:63
constexpr zview(char text[], std::ptrdiff_t len) noexcept(noexcept(std::string_view{text, static_cast< std::size_t >(len)}))
Convenience overload: construct using pointer and signed length.
Definition: zview.hxx:49
constexpr zview() noexcept=default
constexpr zview(char const str[]) noexcept(noexcept(std::string_view{str}))
Construct a zview from a C-style string.
Definition: zview.hxx:78
constexpr zview(std::string_view other) noexcept
Explicitly promote a string_view to a zview.
Definition: zview.hxx:55
zview(std::string const &str) noexcept
Definition: zview.hxx:69