Reduce warnings.

Author: pmienk

include/bitcoin/protocol/zmq/certificate.hpp

@@ -43,7 +43,7 @@ class BCP_API certificate
     certificate(const config::sodium& private_key);
 
     /// True if the certificate is valid.
-    operator const bool() const;
+    operator bool() const;
 
     /// The public key base85 text.
     const config::sodium& public_key() const;

include/bitcoin/protocol/zmq/context.hpp

@@ -45,7 +45,7 @@ class BCP_API context
     virtual ~context();
 
     /// True if the context is valid and started.
-    operator const bool() const;
+    operator bool() const;
 
     /// The underlying zeromq context.
     void* self();

include/bitcoin/protocol/zmq/frame.hpp

@@ -47,7 +47,7 @@ class BCP_API frame
     virtual ~frame();
 
     /// True if the construction was successful.
-    operator const bool() const;
+    operator bool() const;
 
     /// True if there is more data to receive.
     bool more() const;

include/bitcoin/protocol/zmq/socket.hpp

@@ -80,7 +80,7 @@ class BCP_API socket
     virtual bool stop();
 
     /// True if the socket is valid.
-    operator const bool() const;
+    operator bool() const;
 
     /// The underlying zeromq socket.
     void* self();

src/zmq/certificate.cpp

@@ -70,7 +70,7 @@ bool certificate::derive(config::sodium& out_public,
 static inline bool ok_setting(const std::string& key)
 {
     return key.find_first_of('#') == std::string::npos;
-};
+}
 
 bool certificate::create(config::sodium& out_public,
     config::sodium& out_private, bool setting)
@@ -97,7 +97,7 @@ bool certificate::create(config::sodium& out_public,
     return false;
 }
 
-certificate::operator const bool() const
+certificate::operator bool() const
 {
     return public_;
 }

src/zmq/context.cpp

@@ -74,7 +74,7 @@ bool context::stop()
     ///////////////////////////////////////////////////////////////////////////
 }
 
-context::operator const bool() const
+context::operator bool() const
 {
     return self_ != nullptr;
 }

src/zmq/frame.cpp

@@ -67,7 +67,7 @@ bool frame::initialize(const data_chunk& data)
     return true;
 }
 
-frame::operator const bool() const
+frame::operator bool() const
 {
     return valid_;
 }

src/zmq/socket.cpp

@@ -190,7 +190,7 @@ bool socket::stop()
     return true;
 }
 
-socket::operator const bool() const
+socket::operator bool() const
 {
     return self_ != nullptr;
 }