Replace Q_DECL_UNUSED with [[maybe_unused]]

Use C++17 attribute directly

Change-Id: Id853e7a5117065e4adb549f81303c1820fe198ce
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

2 files changed, 3 insertions, 3 deletions

diff --git a/src/corelib/kernel/qmetaobjectbuilder.cpp b/src/corelib/kernel/qmetaobjectbuilder.cpp
index 8520151f8c..c4ea31c215 100644
--- a/src/corelib/kernel/qmetaobjectbuilder.cpp
+++ b/src/corelib/kernel/qmetaobjectbuilder.cpp
@@ -89,7 +89,7 @@ Q_CORE_EXPORT bool isBuiltinType(const QByteArray &type)
 } // namespace QtPrivate
 
 // copied from qmetaobject.cpp
-Q_DECL_UNUSED static inline const QMetaObjectPrivate *priv(const uint* data)
+[[maybe_unused]] static inline const QMetaObjectPrivate *priv(const uint* data)
 { return reinterpret_cast<const QMetaObjectPrivate*>(data); }
 
 class QMetaMethodBuilderPrivate
diff --git a/src/corelib/kernel/qsystemerror.cpp b/src/corelib/kernel/qsystemerror.cpp
index 619f94c476..a2df9dee93 100644
--- a/src/corelib/kernel/qsystemerror.cpp
+++ b/src/corelib/kernel/qsystemerror.cpp
@@ -61,11 +61,11 @@ namespace {
     // version in portable code. However, it's impossible to do that if
     // _GNU_SOURCE is defined so we use C++ overloading to decide what to do
     // depending on the return type
-    Q_DECL_UNUSED static inline QString fromstrerror_helper(int, const QByteArray &buf)
+    [[maybe_unused]] static inline QString fromstrerror_helper(int, const QByteArray &buf)
     {
         return QString::fromLocal8Bit(buf);
     }
-    Q_DECL_UNUSED static inline QString fromstrerror_helper(const char *str, const QByteArray &)
+    [[maybe_unused]] static inline QString fromstrerror_helper(const char *str, const QByteArray &)
     {
         return QString::fromLocal8Bit(str);
     }