14 #include "pqxx/compiler-public.hxx" 17 #include <string_view> 18 #include <type_traits> 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)}
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 {
return data(); }
95 constexpr
zview operator"" _zv(
char const str[], std::size_t len) noexcept
97 return zview{str, len};
102 #if defined(PQXX_HAVE_CONCEPTS) 112 std::is_convertible_v<T, char const *> or std::is_convertible_v<T, zview> or
113 std::is_convertible_v<T, std::string const &>;
115 #endif // PQXX_HAVE_CONCEPTS 121 inline constexpr
char const *
as_c_string(
char const str[]) noexcept
126 template<std::
size_t N>
constexpr zview(char const text[], std::ptrdiff_t len)
Convenience overload: construct using pointer and signed length.
Definition: zview.hxx:43
constexpr zview(char const str[])
Construct a zview from a C-style string.
Definition: zview.hxx:69
Internal items for libpqxx' own use. Do not use these yourself.
Definition: composite.hxx:73
zview(std::string const &str)
Definition: zview.hxx:61
constexpr char const * c_str() const noexcept
Either a null pointer, or a zero-terminated text buffer.
Definition: zview.hxx:85
constexpr zview(char const (&literal)[size])
Construct a zview from a string literal.
Definition: zview.hxx:81
constexpr char const * as_c_string(char const str[]) noexcept
Get a raw C string pointer.
Definition: zview.hxx:121
The home of all libpqxx classes, functions, templates, etc.
Definition: array.hxx:25
constexpr zview() noexcept=default
constexpr zview(Args &&...args)
Construct from any initialiser you might use for std::string_view.
Definition: zview.hxx:56
constexpr zview(char text[], std::ptrdiff_t len)
Convenience overload: construct using pointer and signed length.
Definition: zview.hxx:48
Marker-type wrapper: zero-terminated std::string_view.
Definition: zview.hxx:37