| Q_FOREACH ( variable , container ) | |
| Q_FOREVER | |
| foreach ( variable , container ) | |
| forever |
Same as foreach( variable , container ).
This macro is available even when
no_keywords
is specified using the
.pro
file's
CONFIG
变量。
注意：
Since Qt 5.7, the use of this macro is discouraged. Use C++11 range-based
for
, possibly with
std::as_const()
, as needed.
如同 forever .
This macro is available even when
no_keywords
is specified using the
.pro
file's
CONFIG
变量。
另请参阅 foreach ().
This macro is used to implement Qt's
foreach
loop. The
variable
parameter is a variable name or variable definition; the
container
parameter is a Qt container whose value type corresponds to the type of the variable. See
foreach 关键字
了解细节。
If you're worried about namespace pollution, you can disable this macro by adding the following line to your
.pro
文件：
CONFIG += no_keywords
注意：
Since Qt 5.7, the use of this macro is discouraged. Use C++11 range-based
for
, possibly with
std::as_const()
, as needed.
This macro is provided for convenience for writing infinite loops.
范例：
forever {
...
}
它相当于
for (;;)
.
If you're worried about namespace pollution, you can disable this macro by adding the following line to your
.pro
文件：
CONFIG += no_keywords
If using other build systems, you can add
QT_NO_KEYWORDS
to the list of pre-defined macros.
另请参阅 Q_FOREVER .