20 files changed, 37 insertions, 22 deletions
diff --git a/doc/developer-notes.md b/doc/developer-notes.md
index a7fb4b4da1..81bdcc9fdb 100644
--- a/doc/developer-notes.md
+++ b/doc/developer-notes.md
@@ -68,7 +68,7 @@ public:
         return true;
     }
 }
-}
+} // namespace foo
 ```
 
 Doxygen comments
@@ -438,6 +438,21 @@ Source code organization
 
   - *Rationale*: Avoids symbol conflicts
 
+- Terminate namespaces with a comment (`// namespace mynamespace`). The comment
+  should be placed on the same line as the brace closing the namespace, e.g.
+
+```c++
+namespace mynamespace {
+    ...
+} // namespace mynamespace
+
+namespace {
+    ...
+} // namespace
+```
+
+  - *Rationale*: Avoids confusion about the namespace context
+
 GUI
 -----
 
diff --git a/src/base58.cpp b/src/base58.cpp
index 36b3523692..efa1beb1e4 100644
--- a/src/base58.cpp
+++ b/src/base58.cpp
@@ -225,7 +225,7 @@ public:
     bool operator()(const CNoDestination& no) const { return false; }
 };
 
-} // anon namespace
+} // namespace
 
 bool CBitcoinAddress::Set(const CKeyID& id)
 {
diff --git a/src/bench/checkblock.cpp b/src/bench/checkblock.cpp
index 195388839e..7bb1b93668 100644
--- a/src/bench/checkblock.cpp
+++ b/src/bench/checkblock.cpp
@@ -11,7 +11,7 @@
 
 namespace block_bench {
 #include "bench/data/block413567.raw.h"
-}
+} // namespace block_bench
 
 // These are the two major time-sinks which happen after we have fully received
 // a block off the wire, but before we can relay the block on to peers using
diff --git a/src/compat/glibc_sanity.cpp b/src/compat/glibc_sanity.cpp
index d62d74d462..b4d1c90992 100644
--- a/src/compat/glibc_sanity.cpp
+++ b/src/compat/glibc_sanity.cpp
@@ -56,7 +56,7 @@ bool sanity_test_fdelt()
 }
 #endif
 
-} // anon namespace
+} // namespace
 
 bool glibc_sanity_test()
 {
diff --git a/src/compat/glibcxx_sanity.cpp b/src/compat/glibcxx_sanity.cpp
index cee8a98c7f..569fb1bbe8 100644
--- a/src/compat/glibcxx_sanity.cpp
+++ b/src/compat/glibcxx_sanity.cpp
@@ -38,7 +38,7 @@ bool sanity_test_list(unsigned int size)
     return true;
 }
 
-} // anon namespace
+} // namespace
 
 // trigger: string::at(x) on an empty string to trigger __throw_out_of_range_fmt.
 // test: force std::string to throw an out_of_range exception. Verify that
diff --git a/src/dbwrapper.cpp b/src/dbwrapper.cpp
index 4ad8a2c1ac..ba9e21cc1f 100644
--- a/src/dbwrapper.cpp
+++ b/src/dbwrapper.cpp
@@ -209,4 +209,4 @@ const std::vector<unsigned char>& GetObfuscateKey(const CDBWrapper &w)
     return w.obfuscate_key;
 }
 
-};
+} // namespace dbwrapper_private
diff --git a/src/init.cpp b/src/init.cpp
index 686a31b0f4..1f3a58e53b 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -822,7 +822,7 @@ int nUserMaxConnections;
 int nFD;
 ServiceFlags nLocalServices = NODE_NETWORK;
 
-}
+} // namespace
 
 [[noreturn]] static void new_handler_terminate()
 {
diff --git a/src/net_processing.cpp b/src/net_processing.cpp
index 91681265b1..8fc6f6f95e 100644
--- a/src/net_processing.cpp
+++ b/src/net_processing.cpp
@@ -120,7 +120,7 @@ namespace {
     MapRelay mapRelay;
     /** Expiration-time ordered list of (expire time, relay map entry) pairs, protected by cs_main). */
     std::deque<std::pair<int64_t, MapRelay::iterator>> vRelayExpiration;
-} // anon namespace
+} // namespace
 
 //////////////////////////////////////////////////////////////////////////////
 //
@@ -559,7 +559,7 @@ void FindNextBlocksToDownload(NodeId nodeid, unsigned int count, std::vector<con
     }
 }
 
-} // anon namespace
+} // namespace
 
 bool GetNodeStateStats(NodeId nodeid, CNodeStateStats &stats) {
     LOCK(cs_main);
diff --git a/src/protocol.cpp b/src/protocol.cpp
index 6cd246ed53..da87e40091 100644
--- a/src/protocol.cpp
+++ b/src/protocol.cpp
@@ -39,7 +39,7 @@ const char *SENDCMPCT="sendcmpct";
 const char *CMPCTBLOCK="cmpctblock";
 const char *GETBLOCKTXN="getblocktxn";
 const char *BLOCKTXN="blocktxn";
-};
+} // namespace NetMsgType
 
 /** All known message types. Keep this in the same order as the list of
  * messages above and in protocol.h.
diff --git a/src/pubkey.cpp b/src/pubkey.cpp
index e57fa238cb..a16457ea4e 100644
--- a/src/pubkey.cpp
+++ b/src/pubkey.cpp
@@ -11,7 +11,7 @@ namespace
 {
 /* Global secp256k1_context object used for verification. */
 secp256k1_context* secp256k1_context_verify = NULL;
-}
+} // namespace
 
 /** This function is taken from the libsecp256k1 distribution and implements
  *  DER parsing for ECDSA signatures, while supporting an arbitrary subset of
diff --git a/src/script/bitcoinconsensus.cpp b/src/script/bitcoinconsensus.cpp
index c4ab441e2c..4b71a42cdf 100644
--- a/src/script/bitcoinconsensus.cpp
+++ b/src/script/bitcoinconsensus.cpp
@@ -68,7 +68,7 @@ struct ECCryptoClosure
 };
 
 ECCryptoClosure instance_of_eccryptoclosure;
-}
+} // namespace
 
 /** Check that all specified flags are part of the libconsensus interface. */
 static bool verify_flags(unsigned int flags)
diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp
index 222cff59ea..7149c938fc 100644
--- a/src/script/interpreter.cpp
+++ b/src/script/interpreter.cpp
@@ -31,7 +31,7 @@ inline bool set_error(ScriptError* ret, const ScriptError serror)
     return false;
 }
 
-} // anon namespace
+} // namespace
 
 bool CastToBool(const valtype& vch)
 {
@@ -1164,7 +1164,7 @@ uint256 GetOutputsHash(const CTransaction& txTo) {
     return ss.GetHash();
 }
 
-} // anon namespace
+} // namespace
 
 PrecomputedTransactionData::PrecomputedTransactionData(const CTransaction& txTo)
 {
diff --git a/src/script/sigcache.cpp b/src/script/sigcache.cpp
index 7bb8d9941b..befc5f5233 100644
--- a/src/script/sigcache.cpp
+++ b/src/script/sigcache.cpp
@@ -66,7 +66,7 @@ public:
  * signatureCache could be made local to VerifySignature.
 */
 static CSignatureCache signatureCache;
-}
+} // namespace
 
 // To be called once in AppInitMain/BasicTestingSetup to initialize the
 // signatureCache.
diff --git a/src/script/sign.cpp b/src/script/sign.cpp
index f4a32472b0..4b01a6de94 100644
--- a/src/script/sign.cpp
+++ b/src/script/sign.cpp
@@ -399,7 +399,7 @@ public:
     }
 };
 const DummySignatureChecker dummyChecker;
-}
+} // namespace
 
 const BaseSignatureChecker& DummySignatureCreator::Checker() const
 {
diff --git a/src/script/standard.cpp b/src/script/standard.cpp
index 7efcad7b0f..8e08acf0c6 100644
--- a/src/script/standard.cpp
+++ b/src/script/standard.cpp
@@ -273,7 +273,7 @@ public:
         return true;
     }
 };
-}
+} // namespace
 
 CScript GetScriptForDestination(const CTxDestination& dest)
 {
diff --git a/src/test/coins_tests.cpp b/src/test/coins_tests.cpp
index 33abfabe6b..622b157621 100644
--- a/src/test/coins_tests.cpp
+++ b/src/test/coins_tests.cpp
@@ -99,7 +99,7 @@ public:
     size_t& usage() { return cachedCoinsUsage; }
 };
 
-}
+} // namespace
 
 BOOST_FIXTURE_TEST_SUITE(coins_tests, BasicTestingSetup)
 
diff --git a/src/test/script_tests.cpp b/src/test/script_tests.cpp
index 2ff4f4227e..1bb191c73d 100644
--- a/src/test/script_tests.cpp
+++ b/src/test/script_tests.cpp
@@ -468,7 +468,7 @@ std::string JSONPrettyPrint(const UniValue& univalue)
     }
     return ret;
 }
-}
+} // namespace
 
 BOOST_AUTO_TEST_CASE(script_build)
 {
diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index f49fd391da..8deb703d2e 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -769,7 +769,7 @@ public:
         return counta < countb;
     }
 };
-}
+} // namespace
 
 std::vector<CTxMemPool::indexed_transaction_set::const_iterator> CTxMemPool::GetSortedDepthAndScore() const
 {
diff --git a/src/validation.cpp b/src/validation.cpp
index f09fff8ee8..eb6ea42b63 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -1297,7 +1297,7 @@ bool AbortNode(CValidationState& state, const std::string& strMessage, const std
     return state.Error(strMessage);
 }
 
-} // anon namespace
+} // namespace
 
 enum DisconnectResult
 {
diff --git a/src/versionbits.cpp b/src/versionbits.cpp
index 4bb352f23c..92c90b7efb 100644
--- a/src/versionbits.cpp
+++ b/src/versionbits.cpp
@@ -189,7 +189,7 @@ public:
     uint32_t Mask(const Consensus::Params& params) const { return ((uint32_t)1) << params.vDeployments[id].bit; }
 };
 
-}
+} // namespace
 
 ThresholdState VersionBitsState(const CBlockIndex* pindexPrev, const Consensus::Params& params, Consensus::DeploymentPos pos, VersionBitsCache& cache)
 {