The <QtTypes> header file includes Qt fundamental type declarations. 更多...
头: | #include <QtTypes> |
qint8 | |
qint16 | |
qint32 | |
qint64 | |
(从 6.6 起)
|
qint128 |
qintptr | |
qlonglong | |
qptrdiff | |
qreal | |
qsizetype | |
quint8 | |
quint16 | |
quint32 | |
quint64 | |
(从 6.6 起)
|
quint128 |
quintptr | |
qulonglong | |
uchar | |
uint | |
ulong | |
ushort |
(从 6.2 起)
|
|
(从 6.2 起)
|
|
(从 6.2 起)
|
|
(从 6.2 起)
|
|
(从 6.2 起)
|
PRIXQUINTPTR |
(从 6.2 起)
|
PRIdQINTPTR |
(从 6.2 起)
|
PRIdQPTRDIFF |
(从 6.2 起)
|
PRIdQSIZETYPE |
(从 6.2 起)
|
PRIiQINTPTR |
(从 6.2 起)
|
PRIiQPTRDIFF |
(从 6.2 起)
|
PRIiQSIZETYPE |
(从 6.2 起)
|
PRIoQUINTPTR |
(从 6.2 起)
|
PRIuQUINTPTR |
(从 6.2 起)
|
PRIxQUINTPTR |
(从 6.6 起)
|
QT_SUPPORTS_INT128 |
(从 6.6 起)
qint128
|
Q_INT128_C ( literal ) |
(从 6.6 起)
|
Q_INT128_MAX |
(从 6.6 起)
|
Q_INT128_MIN |
qint64 | Q_INT64_C ( literal ) |
(从 6.6 起)
quint128
|
Q_UINT128_C ( literal ) |
(从 6.6 起)
|
Q_UINT128_MAX |
quint64 | Q_UINT64_C ( literal ) |
The header file declares several type definitions that guarantee a specified bit-size on all platforms supported by Qt for various basic types, for example
qint8
which is a signed char guaranteed to be 8-bit on all platforms supported by Qt. The header file also declares the
qlonglong
type definition for
long long int
.
Several convenience type definitions are declared:
qreal
for
double
or
float
,
uchar
for
unsigned char
,
uint
for
无符号 int
,
ulong
for
unsigned long
and
ushort
for
unsigned short
.
The header also provides series of macros that make it possible to print some Qt type aliases (qsizetype, qintptr, etc.) via a formatted output facility such as printf() or qDebug () without raising formatting warnings and without the need of a type cast.
typedef 对于
signed char
。此类型保证在 Qt 支持的所有平台为 8 位。
typedef 对于
signed short
。此类型保证在 Qt 支持的所有平台为 16 位。
typedef 对于
signed int
。此类型保证在 Qt 支持的所有平台为 32 位。
typedef 对于
long long int
. This type is guaranteed to be 64-bit on all platforms supported by Qt.
可以创建此类型的文字使用 Q_INT64_C () 宏:
qint64 value = Q_INT64_C(932838457459459);
另请参阅 Q_INT64_C (), quint64 ,和 qlonglong .
[since 6.6]
qint128
typedef 对于
__int128
on platforms that support it (Qt defines the macro
QT_SUPPORTS_INT128
if this is the case).
可以创建此类型的文字使用 Q_INT128_C () 宏。
This typedef was introduced in Qt 6.6.
另请参阅 Q_INT128_C (), Q_INT128_MIN , Q_INT128_MAX , quint128 ,和 QT_SUPPORTS_INT128 .
用于以有符号整数表示指针的整型 (对哈希等有用)。
typedef 为 qint32 或 qint64。此类型保证在 Qt 支持的所有平台,指针的大小相同。在采用 32 位指针的系统中,qintptr typedef 为 qint32;在采用 64 位指针的系统中,qintptr typedef 为 qint64。
注意,qintptr 有符号。使用 quintptr 对于无符号值。
In order to print values of this type by using formatted-output facilities such as
printf()
,
qDebug
(),
QString::asprintf
() and so on, you can use the
PRIdQINTPTR
and
PRIiQINTPTR
macros as format specifiers. They will both print the value as a base 10 number.
qintptr p = 123; printf("The pointer is %" PRIdQINTPTR "\n", p);
另请参阅 qptrdiff , qint32 ,和 qint64 .
typedef 对于
long long int
(
__int64
在 Windows)。这如同
qint64
.
另请参阅 qulonglong and qint64 .
用于表示指针差异的整型。
Typedef for either qint32 or qint64. This type is guaranteed to be the same size as a pointer on all platforms supported by Qt. On a system with 32-bit pointers, quintptr is a typedef for quint32; on a system with 64-bit pointers, quintptr is a typedef for quint64.
注意:qptrdiff 是有符号的。使用 quintptr 为无符号值。
In order to print values of this type by using formatted-output facilities such as
printf()
,
qDebug
(),
QString::asprintf
() and so on, you can use the
PRIdQPTRDIFF
and
PRIiQPTRDIFF
macros as format specifiers. They will both print the value as a base 10 number.
qptrdiff d = 123; printf("The difference is %" PRIdQPTRDIFF "\n", d);
另请参阅 quintptr , qint32 ,和 qint64 .
typedef 对于
double
除非配置 Qt 采用
-qreal float
选项。
[alias]
qsizetype
整型类型提供 POSIX
ssize_t
对于所有平台。
此类型保证相同大小如
size_t
在 Qt 支持的所有平台。
注意:qsizetype 无符号。使用
size_t
对于无符号值。
In order to print values of this type by using formatted-output facilities such as
printf()
,
qDebug
(),
QString::asprintf
() and so on, you can use the
PRIdQSIZETYPE
and
PRIiQSIZETYPE
macros as format specifiers. They will both print the value as a base 10 number.
qsizetype s = 123; printf("The size is %" PRIdQSIZETYPE "\n", s);
另请参阅 qptrdiff .
typedef 对于
unsigned char
。此类型保证在 Qt 支持的所有平台为 8 位。
typedef 对于
unsigned short
。此类型保证在 Qt 支持的所有平台为 16 位。
typedef 对于
无符号 int
。此类型保证在 Qt 支持的所有平台为 32 位。
typedef 对于
unsigned long long int
. This type is guaranteed to be 64-bit on all platforms supported by Qt.
可以创建此类型的文字使用 Q_UINT64_C () 宏:
quint64 value = Q_UINT64_C(932838457459459);
另请参阅 Q_UINT64_C (), qint64 ,和 qulonglong .
[since 6.6]
quint128
typedef 对于
unsigned __int128
on platforms that support it (Qt defines the macro
QT_SUPPORTS_INT128
if this is the case).
可以创建此类型的文字使用 Q_UINT128_C () 宏。
This typedef was introduced in Qt 6.6.
另请参阅 Q_UINT128_C (), Q_UINT128_MAX , qint128 ,和 QT_SUPPORTS_INT128 .
Integral type for representing pointers in an unsigned integer (useful for hashing, etc.).
Typedef for either quint32 or quint64. This type is guaranteed to be the same size as a pointer on all platforms supported by Qt. On a system with 32-bit pointers, quintptr is a typedef for quint32; on a system with 64-bit pointers, quintptr is a typedef for quint64.
Note that quintptr is unsigned. Use qptrdiff for signed values.
In order to print values of this type by using formatted-output facilities such as
printf()
,
qDebug
(),
QString::asprintf
() and so on, you can use the following macros as format specifiers:
PRIuQUINTPTR
: prints the value as a base 10 number.
PRIoQUINTPTR
: prints the value as a base 8 number.
PRIxQUINTPTR
: prints the value as a base 16 number, using lowercase
a-f
letters.
PRIXQUINTPTR
: prints the value as a base 16 number, using uppercase
A-F
letters.
quintptr p = 123u; printf("The pointer value is 0x%" PRIXQUINTPTR "\n", p);
另请参阅 qptrdiff , quint32 ,和 quint64 .
typedef 对于
unsigned long long int
(
unsigned __int64
在 Windows)。这如同
quint64
.
方便 typedef 对于
unsigned char
.
方便 typedef 对于
无符号 int
.
方便 typedef 对于
unsigned long
.
方便 typedef 对于
unsigned short
.
[since 6.2]
PRIdQINTPTR
[since 6.2]
PRIiQINTPTR
见 qintptr .
该函数在 Qt 6.2 引入。
[since 6.2]
PRIXQUINTPTR
[since 6.2]
PRIoQUINTPTR
[since 6.2]
PRIuQUINTPTR
[since 6.2]
PRIxQUINTPTR
See quintptr.
该函数在 Qt 6.2 引入。
[since 6.2]
PRIdQPTRDIFF
[since 6.2]
PRIiQPTRDIFF
See qptrdiff.
该函数在 Qt 6.2 引入。
[since 6.2]
PRIdQSIZETYPE
[since 6.2]
PRIiQSIZETYPE
See qsizetype.
该函数在 Qt 6.2 引入。
[since 6.2]
PRIXQUINTPTR
This macro was introduced in Qt 6.2.
[since 6.2]
PRIdQINTPTR
This macro was introduced in Qt 6.2.
[since 6.2]
PRIdQPTRDIFF
This macro was introduced in Qt 6.2.
[since 6.2]
PRIdQSIZETYPE
This macro was introduced in Qt 6.2.
[since 6.2]
PRIiQINTPTR
This macro was introduced in Qt 6.2.
[since 6.2]
PRIiQPTRDIFF
This macro was introduced in Qt 6.2.
[since 6.2]
PRIiQSIZETYPE
This macro was introduced in Qt 6.2.
[since 6.2]
PRIoQUINTPTR
This macro was introduced in Qt 6.2.
[since 6.2]
PRIuQUINTPTR
This macro was introduced in Qt 6.2.
[since 6.2]
PRIxQUINTPTR
This macro was introduced in Qt 6.2.
[since 6.6]
QT_SUPPORTS_INT128
Qt defines this macro as well as the qint128 and quint128 types if the platform has support for 128-bit integer types.
This macro was introduced in Qt 6.6.
另请参阅 qint128 , quint128 , Q_INT128_C (), Q_UINT128_C (), Q_INT128_MIN , Q_INT128_MAX ,和 Q_UINT128_MAX .
[since 6.6]
qint128
Q_INT128_C
(
literal
)
Wraps the signed 128-bit integer literal in a platform-independent way.
注意: 不像 Q_INT64_C (), this macro is only available in C++, not in C. This is because compilers do not provide these literals as built-ins and C does not have support for user-defined literals.
This macro was introduced in Qt 6.6.
另请参阅 qint128 , Q_UINT128_C (), Q_INT128_MIN , Q_INT128_MAX , Q_INT64_C (),和 QT_SUPPORTS_INT128 .
[since 6.6]
Q_INT128_MAX
This macro expands to a compile-time constant representing the maximum value representable in a qint128 .
This macro is available in both C++ and C modes.
This macro was introduced in Qt 6.6.
另请参阅 Q_INT128_MIN , Q_UINT128_MAX , qint128 , Q_INT128_C ,和 QT_SUPPORTS_INT128 .
[since 6.6]
Q_INT128_MIN
This macro expands to a compile-time constant representing the minimum value representable in a qint128 .
This macro is available in both C++ and C modes.
This macro was introduced in Qt 6.6.
另请参阅 Q_INT128_MAX , qint128 , Q_INT128_C ,和 QT_SUPPORTS_INT128 .
Wraps the signed 64-bit integer literal in a platform-independent way.
范例:
qint64 value = Q_INT64_C(932838457459459);
另请参阅 qint64 , Q_UINT64_C (),和 Q_INT128_C ().
[since 6.6]
quint128
Q_UINT128_C
(
literal
)
Wraps the unsigned 128-bit integer literal in a platform-independent way.
注意: 不像 Q_UINT64_C (), this macro is only available in C++, not in C. This is because compilers do not provide these literals as built-ins and C does not have support for user-defined literals.
This macro was introduced in Qt 6.6.
另请参阅 quint128 , Q_INT128_C (), Q_UINT128_MAX , Q_UINT64_C (),和 QT_SUPPORTS_INT128 .
[since 6.6]
Q_UINT128_MAX
This macro expands to a compile-time constant representing the maximum value representable in a quint128 .
This macro is available in both C++ and C modes.
The minimum of
quint128
is 0 (zero), so a
Q_UINT128_MIN
is neither needed nor provided.
This macro was introduced in Qt 6.6.
另请参阅 Q_INT128_MAX , quint128 , Q_UINT128_C ,和 QT_SUPPORTS_INT128 .
Wraps the unsigned 64-bit integer literal in a platform-independent way.
范例:
quint64 value = Q_UINT64_C(932838457459459);
另请参阅 quint64 , Q_INT64_C (),和 Q_UINT128_C ().