Add explicit and make public headers compile with -Wzero-as-null-pointer-constant

... or equivalent.

QtBase 5.6 headers already compile that way, so let the other
modules follow suit.

Added explicit where it was missing. This is not a source-
incompatible change, because code that breaks by this is
a bug. Let's not have this sitting around in an LTS.

Task-number: QTBUG-45291
Change-Id: I375361699615d0fc874e0b96a84543e233eff5f0
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@theqtcompany.com>

5 files changed, 7 insertions, 7 deletions

diff --git a/src/nfc/qnearfieldmanager.h b/src/nfc/qnearfieldmanager.h
index 416c5e91..8c91a801 100644
--- a/src/nfc/qnearfieldmanager.h
+++ b/src/nfc/qnearfieldmanager.h
@@ -59,8 +59,8 @@ public:
     Q_ENUM(TargetAccessMode)
     Q_DECLARE_FLAGS(TargetAccessModes, TargetAccessMode)
 
-    explicit QNearFieldManager(QObject *parent = 0);
-    explicit QNearFieldManager(QNearFieldManagerPrivate *backend, QObject *parent = 0);
+    explicit QNearFieldManager(QObject *parent = Q_NULLPTR);
+    explicit QNearFieldManager(QNearFieldManagerPrivate *backend, QObject *parent = Q_NULLPTR);
     ~QNearFieldManager();
 
     bool isAvailable() const;
diff --git a/src/nfc/qnearfieldsharemanager.h b/src/nfc/qnearfieldsharemanager.h
index 264e82b6..03dc4db9 100644
--- a/src/nfc/qnearfieldsharemanager.h
+++ b/src/nfc/qnearfieldsharemanager.h
@@ -47,7 +47,7 @@ class Q_NFC_EXPORT QNearFieldShareManager : public QObject
     Q_OBJECT
 
 public:
-    explicit QNearFieldShareManager(QObject *parent = 0);
+    explicit QNearFieldShareManager(QObject *parent = Q_NULLPTR);
     ~QNearFieldShareManager();
 
     enum ShareError {
diff --git a/src/nfc/qnearfieldsharetarget.h b/src/nfc/qnearfieldsharetarget.h
index cc85086f..36f4a5cc 100644
--- a/src/nfc/qnearfieldsharetarget.h
+++ b/src/nfc/qnearfieldsharetarget.h
@@ -63,7 +63,7 @@ Q_SIGNALS:
     void shareFinished();
 
 private:
-    explicit QNearFieldShareTarget(QNearFieldShareManager::ShareModes modes, QObject *parent = 0);
+    explicit QNearFieldShareTarget(QNearFieldShareManager::ShareModes modes, QObject *parent = Q_NULLPTR);
 
     QNearFieldShareTargetPrivate *d_ptr;
     Q_DECLARE_PRIVATE(QNearFieldShareTarget)
diff --git a/src/nfc/qnearfieldtarget.h b/src/nfc/qnearfieldtarget.h
index a7abbe25..d9f6786e 100644
--- a/src/nfc/qnearfieldtarget.h
+++ b/src/nfc/qnearfieldtarget.h
@@ -110,7 +110,7 @@ public:
         QSharedDataPointer<RequestIdPrivate> d;
     };
 
-    explicit QNearFieldTarget(QObject *parent = 0);
+    explicit QNearFieldTarget(QObject *parent = Q_NULLPTR);
     virtual ~QNearFieldTarget();
 
     virtual QByteArray uid() const = 0;
diff --git a/src/nfc/qqmlndefrecord.h b/src/nfc/qqmlndefrecord.h
index 93a3106e..35b2ab5f 100644
--- a/src/nfc/qqmlndefrecord.h
+++ b/src/nfc/qqmlndefrecord.h
@@ -63,8 +63,8 @@ public:
     };
     Q_ENUM(TypeNameFormat)
 
-    explicit QQmlNdefRecord(QObject *parent = 0);
-    explicit QQmlNdefRecord(const QNdefRecord &record, QObject *parent = 0);
+    explicit QQmlNdefRecord(QObject *parent = Q_NULLPTR);
+    explicit QQmlNdefRecord(const QNdefRecord &record, QObject *parent = Q_NULLPTR);
     ~QQmlNdefRecord();
 
     QString type() const;