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) :
44 std::string_view{
text,
static_cast<std::size_t
>(len)}
48 constexpr
zview(
char text[], std::ptrdiff_t len) :
49 std::string_view{
text, static_cast<std::size_t>(len)}
55 template<
typename... Args>
56 explicit constexpr
zview(Args &&...args) :
57 std::string_view(std::forward<Args>(args)...)
61 zview(std::string
const &str) : std::string_view{str.
c_str(), std::size(str)}
69 constexpr
zview(
char const str[]) : std::string_view{str} {}
81 constexpr
zview(
char const (&literal)[size]) :
zview(literal, size - 1)
85 [[nodiscard]] constexpr
char const *
c_str() const &noexcept
100 constexpr
zview operator"" _zv(
char const str[], std::size_t len) noexcept
102 return zview{str, len};
107 #if defined(PQXX_HAVE_CONCEPTS)
110 template<>
inline constexpr
bool std::ranges::enable_view<pqxx::zview>{
true};
116 inline constexpr
bool std::ranges::enable_borrowed_range<pqxx::zview>{
true};
126 concept ZString = std::is_convertible_v < strip_t<T>,
127 char const * > or std::is_convertible_v<strip_t<T>, zview> or
128 std::is_convertible_v<T, std::string const &>;
136 inline constexpr
char const *
as_c_string(
char const str[]) noexcept
141 template<std::
size_t N>
The home of all libpqxx classes, functions, templates, etc.
Definition: array.hxx:23
Internal items for libpqxx' own use. Do not use these yourself.
Definition: composite.hxx:80
constexpr char const * as_c_string(char const str[]) noexcept
Get a raw C string pointer.
Definition: zview.hxx:136
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:81
constexpr char const * c_str() const &noexcept
Either a null pointer, or a zero-terminated text buffer.
Definition: zview.hxx:85
constexpr zview(Args &&...args)
Construct from any initialiser you might use for std::string_view.
Definition: zview.hxx:56
constexpr zview() noexcept=default
constexpr zview(char text[], std::ptrdiff_t len)
Convenience overload: construct using pointer and signed length.
Definition: zview.hxx:48
zview(std::string const &str)
Definition: zview.hxx:61
constexpr zview(char const str[])
Construct a zview from a C-style string.
Definition: zview.hxx:69