Qt::Literals Namespace
namespace Qt::Literals“Literals” 内联命名空间声明了 Qt 类型的字面量运算符。更多内容...
| 头文件： | #include <QString> |
| CMake： | find_package(Qt6 REQUIRED COMPONENTS Core) target_link_libraries(mytarget PRIVATE Qt6::Core) |
| qmake： | QT += core |
命名空间
| namespace | StringLiterals |
命名空间
namespace Literals::StringLiterals
内联命名空间Qt::Literals::StringLiterals 声明了 Qt 字符串类型的字面量运算符。由于Literals 和StringLiterals 这两个命名空间均被声明为内联，因此可以通过在代码中添加以下任一方式来访问该命名空间中的符号：
// Makes visible only the literal operators declared in StringLiterals
using namespace Qt::StringLiterals;
// same, but needlessly verbose:
using namespace Qt::Literals::StringLiterals;
// Makes visible literal operators declared in all inline namespaces
// inside Literals
using namespace Qt::Literals;
// Makes visible all symbols (including all literal operators) declared
// in the Qt namespace
using namespace Qt;不建议使用后一种方式，因为如果 Qt 在Qt::Literals 内的不同命名空间中添加了冲突的操作符，这种方式将无法让你选择所需的字面量操作符。
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