Merge #14214: convert C-style (void) parameter lists to C++ style ()

3ccfa34b32 convert C-style (void) parameter lists to C++ style () (Arvid Norberg)

Pull request description:

  In C, an empty parameter list, `()`, means the function takes any arguments, and `(void)` means the function does not take any parameters.
  In C++, an empty parameter list means the function does not take any parameters.

  So, C++ still supports `(void)` parameter lists with the same semantics, why change to `()`?

  1. removing the redundant `void` improves signal-to-noise ratio of the code
  2. using `(void)` exposes a rare inconsistency in that a template taking a template `(T)` parameter list, cannot be instantiated with `T=void`

Tree-SHA512: be2897b6c5e474873aa878ed6bac098382cd21866aec33752fe40b089a6331aa6263cae749aba1b4a41e8467f1a47086d32eb74abaf09927fd5a2f44a4b2109a

2 files changed, 3 insertions, 3 deletions

diff --git a/src/rpc/server.cpp b/src/rpc/server.cpp
index 8f3fe31ce8..9eb55880b3 100644
--- a/src/rpc/server.cpp
+++ b/src/rpc/server.cpp
@@ -540,7 +540,7 @@ void RPCUnsetTimerInterface(RPCTimerInterface *iface)
         timerInterface = nullptr;
 }
 
-void RPCRunLater(const std::string& name, std::function<void(void)> func, int64_t nSeconds)
+void RPCRunLater(const std::string& name, std::function<void()> func, int64_t nSeconds)
 {
     if (!timerInterface)
         throw JSONRPCError(RPC_INTERNAL_ERROR, "No timer handler registered for RPC");
diff --git a/src/rpc/server.h b/src/rpc/server.h
index 15d0ec80f5..2d62a76f3c 100644
--- a/src/rpc/server.h
+++ b/src/rpc/server.h
@@ -110,7 +110,7 @@ public:
      * This is needed to cope with the case in which there is no HTTP server, but
      * only GUI RPC console, and to break the dependency of pcserver on httprpc.
      */
-    virtual RPCTimerBase* NewTimer(std::function<void(void)>& func, int64_t millis) = 0;
+    virtual RPCTimerBase* NewTimer(std::function<void()>& func, int64_t millis) = 0;
 };
 
 /** Set the factory function for timers */
@@ -124,7 +124,7 @@ void RPCUnsetTimerInterface(RPCTimerInterface *iface);
  * Run func nSeconds from now.
  * Overrides previous timer <name> (if any).
  */
-void RPCRunLater(const std::string& name, std::function<void(void)> func, int64_t nSeconds);
+void RPCRunLater(const std::string& name, std::function<void()> func, int64_t nSeconds);
 
 typedef UniValue(*rpcfn_type)(const JSONRPCRequest& jsonRequest);