14 #include "pqxx/compiler-public.hxx" 15 #include "pqxx/internal/compiler-internal-pre.hxx" 24 #include <string_view> 25 #include <type_traits> 29 #include "pqxx/except.hxx" 30 #include "pqxx/types.hxx" 31 #include "pqxx/version.hxx" 38 #include <pqxx/internal/libpq-forward.hxx> 51 template<
typename TO,
typename FROM>
52 inline TO
check_cast(FROM value,
char const description[])
54 static_assert(std::is_arithmetic_v<FROM>);
55 static_assert(std::is_arithmetic_v<TO>);
56 static_assert(std::is_integral_v<FROM> == std::is_integral_v<TO>);
60 if constexpr (std::is_same_v<FROM, bool>)
61 return static_cast<TO
>(value);
67 using from_limits = std::numeric_limits<decltype(value)>;
68 using to_limits = std::numeric_limits<TO>;
69 if constexpr (std::is_signed_v<FROM>)
71 if constexpr (std::is_signed_v<TO>)
73 if (value < (to_limits::min)())
74 throw range_error(std::string{
"Cast underflow: "} + description);
83 std::string{
"Casting negative value to unsigned type: "} +
93 if constexpr (std::is_integral_v<FROM>)
95 using unsigned_from = std::make_unsigned_t<FROM>;
96 using unsigned_to = std::make_unsigned_t<TO>;
97 constexpr
auto from_max{
static_cast<unsigned_from
>((from_limits::max)())};
98 constexpr
auto to_max{
static_cast<unsigned_to
>((to_limits::max)())};
99 if constexpr (from_max > to_max)
101 if (static_cast<unsigned_from>(value) > to_max)
102 throw range_error(std::string{
"Cast overflow: "} + description);
105 else if constexpr ((from_limits::max)() > (to_limits::max)())
107 if (value > (to_limits::max)())
108 throw range_error(std::string{
"Cast overflow: "} + description);
111 return static_cast<TO
>(value);
159 bool safe_libpq =
false;
168 bool safe_kerberos =
false;
212 explicit namedclass(std::string_view classname) : m_classname{classname} {}
214 namedclass(std::string_view classname, std::string_view name) :
215 m_classname{classname},
220 m_classname{classname},
225 m_classname{classname},
226 m_name{std::move(name)}
230 std::string
const &
name() const noexcept {
return m_name; }
233 std::string
const &
classname() const noexcept {
return m_classname; }
236 std::string description()
const;
239 std::string m_classname, m_name;
256 constexpr
unique() =
default;
260 rhs.m_guest =
nullptr;
265 m_guest = rhs.m_guest;
266 rhs.m_guest =
nullptr;
270 constexpr GUEST *
get()
const noexcept {
return m_guest; }
274 check_unique_registration(G, m_guest);
280 check_unique_unregistration(G, m_guest);
285 GUEST *m_guest =
nullptr;
289 #include "pqxx/internal/compiler-internal-post.hxx" constexpr void register_guest(GUEST *G)
Definition: util.hxx:272
Something is out of range, similar to std::out_of_range.
Definition: except.hxx:192
Private namespace for libpqxx's internal use; do not access.
Definition: connection.hxx:59
std::string const & classname() const noexcept
Class name.
Definition: util.hxx:233
void check_unique_unregistration(namedclass const *new_ptr, namedclass const *old_ptr)
Definition: util.cxx:75
std::string description
A human-readable description of any thread-safety issues.
Definition: util.hxx:171
TO check_cast(FROM value, char const description[])
Cast a numeric value to another type, or throw if it underflows/overflows.
Definition: util.hxx:52
namedclass(std::string_view classname, std::string &&name)
Definition: util.hxx:224
std::string const & name() const noexcept
Object name, or the empty string if no name was given.
Definition: util.hxx:230
The home of all libpqxx classes, functions, templates, etc.
Definition: array.hxx:25
namedclass(std::string_view classname)
Definition: util.hxx:212
constexpr oid oid_none
The "null" oid.
Definition: util.hxx:180
Ensure proper opening/closing of GUEST objects related to a "host" object.
Definition: util.hxx:253
void check_unique_registration(namedclass const *new_ptr, namedclass const *old_ptr)
Definition: util.cxx:60
thread_safety_model describe_thread_safety()
Describe thread safety available in this build.
Definition: util.cxx:26
constexpr unique(unique &&rhs)
Definition: util.hxx:258
int PQXX_VERSION_CHECK() noexcept
Library version check stub.
Definition: version.cxx:18
namedclass(std::string_view classname, std::string_view name)
Definition: util.hxx:214
void check_version()
Definition: util.hxx:136
void ignore_unused(T &&)
Suppress compiler warning about an unused item.
Definition: util.hxx:44
Helper base class: object descriptions for error messages and such.
Definition: util.hxx:209
constexpr unique & operator=(unique &&rhs)
Definition: util.hxx:263
constexpr void unregister_guest(GUEST *G)
Definition: util.hxx:278
namedclass(std::string_view classname, char const name[])
Definition: util.hxx:219
Descriptor of library's thread-safety model.
Definition: util.hxx:156