[core] add explicit to one-argument constructors (#2422)

src/core/api/link_raw.hpp

@@ -55,7 +55,7 @@ public:
      * This constructor initializes the object.
      *
      */
-    LinkRaw(Instance &aInstance);
+    explicit LinkRaw(Instance &aInstance);
 
     /**
      * This method returns true if the raw link-layer is enabled.

src/core/coap/coap.hpp

@@ -747,7 +747,7 @@ public:
      * @param[in] aInstance      A reference to the OpenThread instance.
      *
      */
-    Coap(Instance &aInstance);
+    explicit Coap(Instance &aInstance);
 
 private:
     static void HandleRetransmissionTimer(Timer &aTimer);
@@ -769,7 +769,7 @@ public:
      * @param[in] aInstance      A reference to the OpenThread instance.
      *
      */
-    ApplicationCoap(Instance &aInstance);
+    explicit ApplicationCoap(Instance &aInstance);
 
 private:
     static void HandleRetransmissionTimer(Timer &aTimer);

src/core/coap/coap_secure.hpp

@@ -73,7 +73,7 @@ public:
      * @param[in]  aInstance  A reference to the OpenThread instance.
      *
      */
-    CoapSecure(Instance &aInstance);
+    explicit CoapSecure(Instance &aInstance);
 
     /**
      * This method starts the secure CoAP agent.

src/core/common/message.hpp

@@ -1140,7 +1140,7 @@ public:
      * This constructor initializes the object.
      *
      */
-    MessagePool(Instance &aInstance);
+    explicit MessagePool(Instance &aInstance);
 
     /**
      * This method is used to obtain a new message. The default priority `kDefaultMessagePriority`

src/core/common/notifier.hpp

@@ -106,7 +106,7 @@ public:
      *  @param[in] aInstance     A reference to OpenThread instance.
      *
      */
-    Notifier(Instance &aInstance);
+    explicit Notifier(Instance &aInstance);
 
     /**
      * This method registers a callback.

src/core/meshcop/announce_begin_client.hpp

@@ -54,7 +54,7 @@ public:
      * This constructor initializes the object.
      *
      */
-    AnnounceBeginClient(Instance &aInstance);
+    explicit AnnounceBeginClient(Instance &aInstance);
 
     /**
      * This method sends a Announce Begin message.

src/core/meshcop/commissioner.hpp

@@ -65,7 +65,7 @@ public:
      * @param[in]  aInstance     A reference to the OpenThread instance.
      *
      */
-    Commissioner(Instance &aInstance);
+    explicit Commissioner(Instance &aInstance);
 
     /**
      * This method starts the Commissioner service.

src/core/meshcop/dataset_manager.hpp

@@ -282,7 +282,7 @@ public:
      * @param[in]  aInstance      A reference to the OpenThread instance.
      *
      */
-    ActiveDatasetBase(Instance &aInstance);
+    explicit ActiveDatasetBase(Instance &aInstance);
 
     /**
      * This method restores the Active Operational Dataset from non-volatile memory.
@@ -364,7 +364,7 @@ public:
      * @param[in]  The Thread network interface.
      *
      */
-    PendingDatasetBase(Instance &aInstance);
+    explicit PendingDatasetBase(Instance &aInstance);
 
     /**
      * This method restores the Operational Dataset from non-volatile memory.

src/core/meshcop/dataset_manager_ftd.hpp

@@ -53,7 +53,7 @@ namespace MeshCoP {
 class ActiveDataset: public ActiveDatasetBase
 {
 public:
-    ActiveDataset(Instance &aInstance);
+    explicit ActiveDataset(Instance &aInstance);
 
     otError GenerateLocal(void);
 
@@ -74,7 +74,7 @@ private:
 class PendingDataset: public PendingDatasetBase
 {
 public:
-    PendingDataset(Instance &aInstance);
+    explicit PendingDataset(Instance &aInstance);
 
     void StartLeader(void);
 

src/core/meshcop/dtls.hpp

@@ -72,7 +72,7 @@ public:
      * @param[in]  aNetif  A reference to the Thread network interface.
      *
      */
-    Dtls(Instance &aInstance);
+    explicit Dtls(Instance &aInstance);
 
     /**
      * This function pointer is called when a connection is established or torn down.

src/core/meshcop/energy_scan_client.hpp

@@ -58,7 +58,7 @@ public:
      * This constructor initializes the object.
      *
      */
-    EnergyScanClient(Instance &aInstance);
+    explicit EnergyScanClient(Instance &aInstance);
 
     /**
      * This method sends an Energy Scan Query message.

src/core/meshcop/joiner.hpp

@@ -63,7 +63,7 @@ public:
      * @param[in]  aInstance     A reference to the OpenThread instance.
      *
      */
-    Joiner(Instance &aInstance);
+    explicit Joiner(Instance &aInstance);
 
     /**
      * This method starts the Joiner service.

src/core/meshcop/joiner_router.hpp

@@ -64,7 +64,7 @@ public:
      * @param[in]  aInstance     A reference to the OpenThread instance.
      *
      */
-    JoinerRouter(Instance &aInstance);
+    explicit JoinerRouter(Instance &aInstance);
 
     /**
      * This method returns the Joiner UDP Port.

src/core/meshcop/leader.hpp

@@ -70,7 +70,7 @@ public:
      * @param[in]  aInstance     A reference to the OpenThread instance.
      *
      */
-    Leader(Instance &aInstance);
+    explicit Leader(Instance &aInstance);
 
     /**
      * This method sends a MGMT_DATASET_CHANGED message to commissioner.

src/core/meshcop/panid_query_client.hpp

@@ -58,7 +58,7 @@ public:
      * This constructor initializes the object.
      *
      */
-    PanIdQueryClient(Instance &aInstance);
+    explicit PanIdQueryClient(Instance &aInstance);
 
     /**
      * This method sends a PAN ID Query message.

src/core/net/icmp6.hpp

@@ -231,7 +231,7 @@ public:
      * @param[in]  aInstance A reference to the OpenThread instance.
      *
      */
-    Icmp(Instance &aInstance);
+    explicit Icmp(Instance &aInstance);
 
     /**
      * This method returns a new ICMP message with sufficient header space reserved.

src/core/net/ip6.hpp

@@ -123,7 +123,7 @@ public:
      * @param[in]  aInstance   A reference to the otInstance object.
      *
      */
-    Ip6(Instance &aInstance);
+    explicit Ip6(Instance &aInstance);
 
     /**
      * This method sends an IPv6 datagram.

src/core/net/ip6_mpl.hpp

@@ -439,7 +439,7 @@ public:
      * @param[in]  aInstance  A reference to the OpenThread instance.
      *
      */
-    Mpl(Instance &aInstance);
+    explicit Mpl(Instance &aInstance);
 
     /**
      * This method initializes the MPL option.

src/core/net/ip6_routes.hpp

@@ -80,7 +80,7 @@ public:
      * @param[in]  aInstance  A reference to the OpenThread instance.
      *
      */
-    Routes(Instance &aInstance);
+    explicit Routes(Instance &aInstance);
 
     /**
      * This method adds an IPv6 route.

src/core/net/udp6.hpp

@@ -175,7 +175,7 @@ public:
      * @param[in]  aIp6  A reference to OpenThread instance.
      *
      */
-    Udp(Instance &aInstance);
+    explicit Udp(Instance &aInstance);
 
     /**
      * This method adds a UDP socket.

src/core/thread/announce_begin_server.hpp

@@ -56,7 +56,7 @@ public:
      * This constructor initializes the object.
      *
      */
-    AnnounceBeginServer(Instance &aInstance);
+    explicit AnnounceBeginServer(Instance &aInstance);
 
     /**
      * This method begins the MLE Announce transmission process using Count=3 and Period=1s.

src/core/thread/energy_scan_server.hpp

@@ -64,7 +64,7 @@ public:
      * This constructor initializes the object.
      *
      */
-    EnergyScanServer(Instance &aInstance);
+    explicit EnergyScanServer(Instance &aInstance);
 
 private:
     enum

src/core/thread/panid_query_server.hpp

@@ -63,7 +63,7 @@ public:
      * This constructor initializes the object.
      *
      */
-    PanIdQueryServer(Instance &aInstance);
+    explicit PanIdQueryServer(Instance &aInstance);
 
 private:
     enum

src/core/thread/thread_netif.hpp

@@ -104,7 +104,7 @@ public:
      * @param[in]  aInstance  A reference to the OpenThread instance.
      *
      */
-    ThreadNetif(Instance &aInstance);
+    explicit ThreadNetif(Instance &aInstance);
 
     /**
      * This method enables the Thread network interface.