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author | Giuseppe D'Angelo <giuseppe.dangelo@kdab.com> | 2021-05-02 00:51:06 +0200 |
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committer | Giuseppe D'Angelo <giuseppe.dangelo@kdab.com> | 2021-05-11 13:22:44 +0200 |
commit | e906bb84fba0311b5bc1ec1344dc70ca34981194 (patch) | |
tree | 76c4f654b86befa8ccf8f1c85e182eb0a20e5e2b /src | |
parent | f385b8827a75688b8a2cbd51e8da8a602d7f9567 (diff) |
QFlags: add (named) explicit conversion from/to int
There are some use cases where one may want to convert a QFlags object
from/to an integer deliberately; for instance, to store it in a
bitfield, saving some space. So far this worked by means of a implicit
conversions; instead, also add named conversions for this.
[ChangeLog][QtCore][QFlags] Added the fromInt() and toInt() functions
for explicit conversions from/to a plain integer.
Change-Id: I705559bf75b28c30b4446bb6d0753aedfc808eed
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src')
-rw-r--r-- | src/corelib/global/qflags.h | 3 | ||||
-rw-r--r-- | src/corelib/global/qglobal.cpp | 18 |
2 files changed, 21 insertions, 0 deletions
diff --git a/src/corelib/global/qflags.h b/src/corelib/global/qflags.h index 8d538c97f4..0e20f88c9c 100644 --- a/src/corelib/global/qflags.h +++ b/src/corelib/global/qflags.h @@ -112,6 +112,9 @@ public: constexpr inline QFlags(std::initializer_list<Enum> flags) noexcept : i(initializer_list_helper(flags.begin(), flags.end())) {} + constexpr static inline QFlags fromInt(Int i) noexcept { return QFlags(QFlag(i)); } + constexpr inline Int toInt() const noexcept { return i; } + constexpr inline QFlags &operator&=(int mask) noexcept { i &= mask; return *this; } constexpr inline QFlags &operator&=(uint mask) noexcept { i &= mask; return *this; } constexpr inline QFlags &operator&=(Enum mask) noexcept { i &= Int(mask); return *this; } diff --git a/src/corelib/global/qglobal.cpp b/src/corelib/global/qglobal.cpp index 95f5adab3b..dea3b30a29 100644 --- a/src/corelib/global/qglobal.cpp +++ b/src/corelib/global/qglobal.cpp @@ -498,6 +498,24 @@ static_assert(sizeof(qint64) == 8, "Internal error, qint64 is misdefined"); */ /*! + \fn template <typename Enum> QFlags<Enum> QFlags<Enum>::fromInt(Int i) noexcept + \since 6.2 + + Constructs a QFlags object representing the integer value \a i. +*/ + +/*! + \fn template <typename Enum> Int QFlags<Enum>::toInt() const noexcept + \since 6.2 + + Returns the value stored in the QFlags object as an integer. Note + that the returned integer may be signed or unsigned, depending on + whether the enum's underlying type is signed or unsigned. + + \sa Int +*/ + +/*! \macro Q_DISABLE_COPY(Class) \relates QObject |