SERVER-97062 No anon namespaces or function/variable definitions in headers (#29139)

GitOrigin-RevId: 8c4bfe921c786a6575e1fbca26227097ca4a46ef

.clang-tidy.in

@@ -57,8 +57,10 @@ Checks:          '-*,
                   bugprone-unused-return-value,
                   bugprone-use-after-move,
                   clang-diagnostic-*,
+                  google-build-namespaces,
                   hicpp-static-assert,
                   hicpp-undelegated-constructor,
+                  misc-definitions-in-headers,
                   misc-new-delete-overloads,
                   misc-static-assert,
                   misc-unconventional-assign-operator,
@@ -114,7 +116,6 @@ Checks:          '-*,
                   -cppcoreguidelines-interfaces-global-init,
                   -cppcoreguidelines-narrowing-conversions,
                   -google-build-explicit-make-pair,
-                  -google-build-namespaces,
                   -google-global-names-in-headers,
                   -google-objc-avoid-throwing-exception,
                   -google-objc-global-variable-declaration,
@@ -130,7 +131,6 @@ Checks:          '-*,
                   -hicpp-use-equals-delete,
                   -hicpp-use-noexcept,
                   -hicpp-vararg,
-                  -misc-definitions-in-headers,
                   -misc-misplaced-const,
                   -misc-non-copyable-objects,
                   -misc-redundant-expression,

buildscripts/clang_tidy_vscode.py

@@ -43,7 +43,7 @@ def main():
         if os.path.isfile(arg):
             source_relative_path = os.path.relpath(arg, os.path.dirname(os.path.dirname(__file__)))
             if (
-                arg.endswith(".cpp")
+                (arg.endswith(".cpp") or arg.endswith(".h"))
                 and source_relative_path.startswith("src/mongo")
                 # TODO: SERVER-79076 remove this condition when resolved
                 and not source_relative_path.startswith(

src/mongo/bson/bson_bin_util.h

@@ -42,7 +42,7 @@
 namespace mongo {
 namespace bson_bin_util {
 
-std::string toHex(const char* data, std::size_t len) {
+inline std::string toHex(const char* data, std::size_t len) {
     auto rawString = mongo::StringData(data, len);
     std::ostringstream hexString;
     hexString << std::hex << std::uppercase;
@@ -53,15 +53,15 @@ std::string toHex(const char* data, std::size_t len) {
     return hexString.str();
 }
 
-std::string toHex(const BufBuilder& bldr) {
+inline std::string toHex(const BufBuilder& bldr) {
     return toHex(static_cast<const char*>(bldr.buf()), static_cast<std::size_t>(bldr.len()));
 }
 
-std::string toHex(const BSONBinData& binData) {
+inline std::string toHex(const BSONBinData& binData) {
     return toHex(static_cast<const char*>(binData.data), static_cast<std::size_t>(binData.length));
 }
 
-std::string toHex(const BSONObj& obj) {
+inline std::string toHex(const BSONObj& obj) {
     return toHex(obj.objdata(), static_cast<std::size_t>(obj.objsize()));
 }
 

src/mongo/db/commands/db_command_test_fixture.h

@@ -36,8 +36,6 @@
 #include "mongo/util/assert_util_core.h"
 
 namespace mongo {
-namespace {
-
 class DBCommandTestFixture : public ServiceContextMongoDTest {
 public:
     void setUp() override {
@@ -65,8 +63,7 @@ public:
     static const DatabaseName kDatabaseName;
 };
 
-const DatabaseName DBCommandTestFixture::kDatabaseName =
+inline const DatabaseName DBCommandTestFixture::kDatabaseName =
     DatabaseName::createDatabaseName_forTest(boost::none, "unittest_db");
 
-}  // namespace
 }  // namespace mongo

src/mongo/db/exec/sbe/vm/vm_makeobj.h

@@ -41,7 +41,6 @@
 #include "mongo/platform/compiler.h"
 
 namespace mongo::sbe::vm {
-namespace {
 class MakeObjImpl : ByteCode::MakeObjImplBase {
 public:
     using BaseT = ByteCode::MakeObjImplBase;
@@ -360,5 +359,4 @@ private:
         traverseAndProduceObj(spec, tag, val, fieldName, bob);
     }
 };
-}  // namespace
 }  // namespace mongo::sbe::vm

src/mongo/db/exec/sbe/vm/vm_memory.h

@@ -32,7 +32,6 @@
 namespace mongo {
 namespace sbe {
 namespace vm {
-namespace {
 /**
  * Reads directly from memory for the ByteCode VM.
  */
@@ -56,7 +55,6 @@ size_t writeToMemory(uint8_t* ptr, const T val) noexcept {
     return sizeof(T);
 }
 
-}  // namespace
 }  // namespace vm
 }  // namespace sbe
 }  // namespace mongo

src/mongo/db/exec/timeseries/bucket_unpacker.h

@@ -54,7 +54,6 @@
 #include "mongo/util/time_support.h"
 
 namespace mongo::timeseries {
-namespace {
 // A table that is useful for interpolations between the number of measurements in a bucket and
 // the byte size of a bucket's data section timestamp column. Each table entry is a pair (b_i,
 // S_i), where b_i is the number of measurements in the bucket and S_i is the byte size of the
@@ -62,7 +61,7 @@ namespace {
 // pairs of b_i and S_i for the lower bounds of the row key digit intervals [0, 9], [10, 99],
 // [100, 999], [1000, 9999] and so on. The last entry in the table, S7, is the first entry to
 // exceed the server BSON object limit of 16 MB.
-static constexpr std::array<std::pair<int32_t, int32_t>, 8> kTimestampObjSizeTable{
+inline constexpr std::array<std::pair<int32_t, int32_t>, 8> kTimestampObjSizeTable{
     {{0, BSONObj::kMinBSONLength},
      {10, 115},
      {100, 1195},
@@ -79,7 +78,7 @@ static constexpr std::array<std::pair<int32_t, int32_t>, 8> kTimestampObjSizeTab
 // pair such that 'targetTimestampObjSize' < S_i. Once the interval is found, the upper bound of the
 // pair for the interval is computed and then linear interpolation is used to compute the
 // measurement count corresponding to the 'targetTimestampObjSize' provided.
-int computeElementCountFromTimestampObjSize(int targetTimestampObjSize) {
+inline int computeElementCountFromTimestampObjSize(int targetTimestampObjSize) {
     auto currentInterval =
         std::find_if(std::begin(kTimestampObjSizeTable),
                      std::end(kTimestampObjSizeTable),
@@ -100,7 +99,6 @@ int computeElementCountFromTimestampObjSize(int targetTimestampObjSize) {
     return currentInterval->first +
         ((targetTimestampObjSize - currentInterval->second) / (10 + nDigitsInRowKey));
 }
-}  // namespace
 
 /**
  * BucketUnpacker will unpack bucket fields for metadata and the provided fields.

src/mongo/db/pipeline/aggregation_context_fixture.h

@@ -245,9 +245,8 @@ struct DocumentSourceDeleter {
     }
 };
 
-namespace {
 // A utility function to convert pipeline (a vector of BSONObj) to a string. Helpful for debugging.
-std::string to_string(const std::vector<BSONObj>& objs) {
+inline std::string to_string(const std::vector<BSONObj>& objs) {
     std::stringstream sstrm;
     sstrm << "[" << std::endl;
     for (const auto& obj : objs) {
@@ -256,5 +255,4 @@ std::string to_string(const std::vector<BSONObj>& objs) {
     sstrm << "]" << std::endl;
     return sstrm.str();
 }
-}  // namespace
 }  // namespace mongo

src/mongo/db/pipeline/initialize_auto_get_helper.h

@@ -36,12 +36,11 @@
 #include "mongo/s/transaction_router.h"
 
 namespace mongo {
-namespace {
 /**
  * Function which produces an vector of 'ScopedShardRole' objects for the namespaces in 'nssList'
  * using the routing information in 'criMap'.
  */
-std::vector<ScopedSetShardRole> createScopedShardRoles(
+inline std::vector<ScopedSetShardRole> createScopedShardRoles(
     OperationContext* opCtx,
     const stdx::unordered_map<NamespaceString, CollectionRoutingInfo>& criMap,
     const std::vector<NamespaceString>& nssList) {
@@ -72,7 +71,6 @@ std::vector<ScopedSetShardRole> createScopedShardRoles(
     }
     return scopedShardRoles;
 }
-}  // namespace
 
 /**
  * Helper that constructs an 'AutoGetCollectionForReadCommandMaybeLockFree' using 'initAutoGetFn'.

src/mongo/db/query/optimizer/containers.h

@@ -38,11 +38,10 @@
 
 namespace mongo::optimizer::opt {
 
-namespace {
 enum class ContainerImpl { STD, STDX };
 
 // For debugging, switch between STD and STDX containers.
-static constexpr ContainerImpl kContainerImpl = ContainerImpl::STDX;
+inline constexpr ContainerImpl kContainerImpl = ContainerImpl::STDX;
 
 template <ContainerImpl>
 struct OptContainers {};
@@ -70,7 +69,6 @@ struct OptContainers<ContainerImpl::STD> {
 };
 
 using ActiveContainers = OptContainers<kContainerImpl>;
-}  // namespace
 
 template <class T, class H = ActiveContainers::Hasher<T>, typename... Args>
 using unordered_set = ActiveContainers::unordered_set<T, H, Args...>;

src/mongo/db/query/projection_ast_path_tracking_visitor.h

@@ -103,7 +103,6 @@ private:
     boost::optional<FieldPath> _basePath;
 };
 
-namespace {
 /**
  * A path tracking pre-visitor used for maintaining field names while traversing the AST.
  *
@@ -190,7 +189,6 @@ public:
 private:
     PathTrackingVisitorContext<UserData>* _context;
 };
-}  // namespace
 
 /**
  * A general path tracking walker to be used with projection AST visitors which need to track

src/mongo/db/query/query_shape/serialization_options.h

@@ -51,13 +51,6 @@
 #include "mongo/util/assert_util.h"
 
 namespace mongo {
-namespace {
-// Should never be called, throw to ensure we catch this in tests.
-std::string defaultHmacStrategy(StringData s) {
-    MONGO_UNREACHABLE_TASSERT(7332410);
-}
-}  // namespace
-
 /**
  * A policy enum for how to serialize literal values.
  */
@@ -210,6 +203,11 @@ struct SerializationOptions {
     Value serializeLiteral(const ImplicitValue& v,
                            const boost::optional<Value>& representativeValue = boost::none) const;
 
+    // Should never be called, throw to ensure we catch this in tests.
+    static std::string defaultHmacStrategy(StringData s) {
+        MONGO_UNREACHABLE_TASSERT(7332410);
+    }
+
     // 'literalPolicy' is an independent option to serialize in a general format with the aim of
     // similar "shaped" queries serializing to the same object. For example, if set to
     // 'kToDebugTypeString', then the serialization of {a: {$gt: 2}} should result in {a: {$gt:

src/mongo/db/query/query_stats/query_stats_store_test.cpp

@@ -104,7 +104,7 @@ public:
         SerializationOptions opts = SerializationOptions::kDebugShapeAndMarkIdentifiers_FOR_TEST;
         if (!applyHmac) {
             opts.transformIdentifiers = false;
-            opts.transformIdentifiersCallback = defaultHmacStrategy;
+            opts.transformIdentifiersCallback = opts.defaultHmacStrategy;
         }
         return findKey.toBson(
             expCtx->getOperationContext(), opts, SerializationContext::stateDefault());
@@ -128,7 +128,7 @@ public:
         opts.literalPolicy = literalPolicy;
         if (!applyHmac) {
             opts.transformIdentifiers = false;
-            opts.transformIdentifiersCallback = defaultHmacStrategy;
+            opts.transformIdentifiersCallback = opts.defaultHmacStrategy;
         }
         return aggKey->toBson(
             expCtx->getOperationContext(), opts, SerializationContext::stateDefault());

src/mongo/db/query/search/mongot_cursor.h

@@ -34,13 +34,11 @@
 #include "mongo/executor/task_executor_cursor.h"
 
 namespace mongo::mongot_cursor {
-namespace {
-auto makeRetryOnNetworkErrorPolicy() {
+inline auto makeRetryOnNetworkErrorPolicy() {
     return [retried = false](const Status& st) mutable {
         return std::exchange(retried, true) ? false : ErrorCodes::isNetworkError(st);
     };
 }
-}  // namespace
 
 static constexpr StringData kSearchField = "search"_sd;
 static constexpr StringData kVectorSearchCmd = "vectorSearch"_sd;

src/mongo/db/query/stage_builder/sbe/sbexpr_helpers.h

@@ -38,7 +38,6 @@
 #include "mongo/db/query/stage_builder/sbe/sbexpr.h"
 
 namespace mongo::stage_builder {
-namespace {
 inline void makeSbExprOptSbSlotVecHelper(SbExprOptSbSlotVector& result) {}
 
 template <typename... Ts>
@@ -79,7 +78,6 @@ inline void makeSbExprOptSbSlotVecHelper(SbExprOptSbSlotVector& result,
     result.emplace_back(std::move(p.first), p.second);
     makeSbExprOptSbSlotVecHelper(result, std::forward<Ts>(rest)...);
 }
-}  // namespace
 
 template <typename... Ts>
 auto makeSbExprOptSbSlotVec(Ts&&... pack) {

src/mongo/db/query/write_ops/update_request.h

@@ -40,11 +40,6 @@
 
 namespace mongo {
 
-namespace {
-const std::vector<BSONObj> emptyArrayFilters{};
-const BSONObj emptyCollation{};
-const BSONObj emptySort{};
-
 template <typename T>
 void appendArrayToString(const T& arr, StringBuilder* builder) {
     bool first = true;
@@ -58,7 +53,6 @@ void appendArrayToString(const T& arr, StringBuilder* builder) {
     }
     *builder << "]";
 }
-}  // namespace
 
 class FieldRef;
 
@@ -361,6 +355,10 @@ public:
     }
 
 private:
+    inline static const std::vector<BSONObj> emptyArrayFilters{};
+    inline static const BSONObj emptyCollation{};
+    inline static const BSONObj emptySort{};
+
     NamespaceString _nsString;
 
     write_ops::UpdateOpEntry _updateOp;

src/mongo/db/repl/collection_cloner.h

@@ -65,10 +65,8 @@
 namespace mongo {
 namespace repl {
 
-namespace {
-const int kProgressMeterSecondsBetween = 60;
-const int kProgressMeterCheckInterval = 128;
-}  // namespace
+inline const int kProgressMeterSecondsBetween = 60;
+inline const int kProgressMeterCheckInterval = 128;
 
 class CollectionCloner final : public InitialSyncBaseCloner {
 public:

src/mongo/db/s/analyze_shard_key_read_write_distribution.h

@@ -68,9 +68,7 @@
 namespace mongo {
 namespace analyze_shard_key {
 
-namespace {
 using QueryTargetingInfo = shard_key_pattern_query_util::QueryTargetingInfo;
-}
 
 /**
  * The utility class for calculating read or write distribution metrics for sampled queries against

src/mongo/db/service_entry_point_bm_fixture.h

@@ -44,8 +44,6 @@
 #include "mongo/util/processinfo.h"
 
 namespace mongo {
-namespace {
-
 class ServiceEntryPointBenchmarkFixture : public BenchmarkWithProfiler {
 public:
     void SetUp(benchmark::State& state) override {
@@ -130,10 +128,13 @@ const auto kSEPBMMaxThreads = 2 * ProcessInfo::getNumLogicalCores();
 
 /**
  * Required initializers, but this is a benchmark so nothing needs to be done.
+ *
+ * These should not be in a header file, but it works because it is only included in 2 files and
+ * they are never included into the same binary. If that changes, these should find a home in a new
+ * cpp file.
  */
-MONGO_INITIALIZER_GENERAL(ForkServer, ("EndStartupOptionHandling"), ("default"))
+MONGO_INITIALIZER_GENERAL(ForkServer, ("EndStartupOptionHandling"), ("default"))  // NOLINT
 (InitializerContext* context) {}
-MONGO_INITIALIZER(ServerLogRedirection)(mongo::InitializerContext*) {}
+MONGO_INITIALIZER(ServerLogRedirection)(mongo::InitializerContext*) {}  // NOLINT
 
-}  // namespace
 }  // namespace mongo

src/mongo/db/service_entry_point_shard_role_helpers.h

@@ -93,7 +93,7 @@
 namespace mongo {
 namespace service_entry_point_shard_role_helpers {
 
-BSONObj getRedactedCopyForLogging(const Command* command, const BSONObj& cmdObj) {
+inline BSONObj getRedactedCopyForLogging(const Command* command, const BSONObj& cmdObj) {
     mutablebson::Document cmdToLog(cmdObj, mutablebson::Document::kInPlaceDisabled);
     command->snipForLogging(&cmdToLog);
     BSONObjBuilder bob;
@@ -101,11 +101,11 @@ BSONObj getRedactedCopyForLogging(const Command* command, const BSONObj& cmdObj)
     return bob.obj();
 }
 
-bool lockedForWriting() {
+inline bool lockedForWriting() {
     return mongo::lockedForWriting();
 }
 
-void setPrepareConflictBehaviorForReadConcern(OperationContext* opCtx,
+inline void setPrepareConflictBehaviorForReadConcern(OperationContext* opCtx,
                                                      const CommandInvocation* invocation) {
     // Some read commands can safely ignore prepare conflicts by default because they do not
     // require snapshot isolation and do not conflict with concurrent writes. We also give these
@@ -119,7 +119,7 @@ void setPrepareConflictBehaviorForReadConcern(OperationContext* opCtx,
         opCtx, repl::ReadConcernArgs::get(opCtx), prepareConflictBehavior);
 }
 
-void waitForReadConcern(OperationContext* opCtx,
+inline void waitForReadConcern(OperationContext* opCtx,
                                const CommandInvocation* invocation,
                                const OpMsgRequest& request) {
     Status rcStatus = mongo::waitForReadConcern(opCtx,
@@ -144,7 +144,7 @@ void waitForReadConcern(OperationContext* opCtx,
     }
 }
 
-void waitForSpeculativeMajorityReadConcern(OperationContext* opCtx) {
+inline void waitForSpeculativeMajorityReadConcern(OperationContext* opCtx) {
     auto speculativeReadInfo = repl::SpeculativeMajorityReadInfo::get(opCtx);
     if (!speculativeReadInfo.isSpeculativeRead()) {
         return;
@@ -153,7 +153,7 @@ void waitForSpeculativeMajorityReadConcern(OperationContext* opCtx) {
 }
 
 
-void waitForWriteConcern(OperationContext* opCtx,
+inline void waitForWriteConcern(OperationContext* opCtx,
                                 const CommandInvocation* invocation,
                                 const repl::OpTime& lastOpBeforeRun,
                                 BSONObjBuilder& commandResponseBuilder) {
@@ -231,7 +231,7 @@ void waitForWriteConcern(OperationContext* opCtx,
     // operation then we skip waiting for writeConcern.
 }
 
-void waitForLinearizableReadConcern(OperationContext* opCtx) {
+inline void waitForLinearizableReadConcern(OperationContext* opCtx) {
     // When a linearizable read command is passed in, check to make sure we're reading from the
     // primary.
     if (repl::ReadConcernArgs::get(opCtx).getLevel() ==
@@ -240,17 +240,17 @@ void waitForLinearizableReadConcern(OperationContext* opCtx) {
     }
 }
 
-void uassertCommandDoesNotSpecifyWriteConcern(const GenericArguments& requestArgs) {
+inline void uassertCommandDoesNotSpecifyWriteConcern(const GenericArguments& requestArgs) {
     uassert(ErrorCodes::InvalidOptions,
             "Command does not support writeConcern",
             !commandSpecifiesWriteConcern(requestArgs));
 }
 
-void attachCurOpErrInfo(OperationContext* opCtx, const Status status) {
+inline void attachCurOpErrInfo(OperationContext* opCtx, const Status status) {
     CurOp::get(opCtx)->debug().errInfo = std::move(status);
 }
 
-void appendReplyMetadata(OperationContext* opCtx,
+inline void appendReplyMetadata(OperationContext* opCtx,
                                 const GenericArguments& requestArgs,
                                 BSONObjBuilder* metadataBob) {
     auto const replCoord = repl::ReplicationCoordinator::get(opCtx);
@@ -289,25 +289,25 @@ void appendReplyMetadata(OperationContext* opCtx,
     }
 }
 
-Status refreshDatabase(OperationContext* opCtx, const StaleDbRoutingVersion& se) noexcept {
+inline Status refreshDatabase(OperationContext* opCtx, const StaleDbRoutingVersion& se) noexcept {
     return FilteringMetadataCache::get(opCtx)->onDbVersionMismatch(
         opCtx, se.getDb(), se.getVersionReceived());
 }
 
-Status refreshCollection(OperationContext* opCtx, const StaleConfigInfo& se) noexcept {
+inline Status refreshCollection(OperationContext* opCtx, const StaleConfigInfo& se) noexcept {
     return FilteringMetadataCache::get(opCtx)->onCollectionPlacementVersionMismatch(
         opCtx, se.getNss(), se.getVersionReceived().placementVersion());
 }
 
-Status refreshCatalogCache(OperationContext* opCtx,
-                           const ShardCannotRefreshDueToLocksHeldInfo& refreshInfo) noexcept {
+inline Status refreshCatalogCache(
+    OperationContext* opCtx, const ShardCannotRefreshDueToLocksHeldInfo& refreshInfo) noexcept {
     return Grid::get(opCtx)
         ->catalogCache()
         ->getCollectionRoutingInfo(opCtx, refreshInfo.getNss())
         .getStatus();
 }
 
-void handleReshardingCriticalSectionMetrics(OperationContext* opCtx,
+inline void handleReshardingCriticalSectionMetrics(OperationContext* opCtx,
                                                    const StaleConfigInfo& se) noexcept {
     resharding_metrics::onCriticalSectionError(opCtx, se);
 }
@@ -317,14 +317,14 @@ void handleReshardingCriticalSectionMetrics(OperationContext* opCtx,
 // lock.  This will cause mongod to perhaps erroneously check for write concern when no writes
 // were done, or unnecessarily kill a read operation.  If we re-use the opCtx to retry command
 // execution, we must reset the locker state.
-void resetLockerState(OperationContext* opCtx) noexcept {
+inline void resetLockerState(OperationContext* opCtx) noexcept {
     // It is necessary to lock the client to change the Locker on the OperationContext.
     stdx::lock_guard<Client> lk(*opCtx->getClient());
     invariant(!shard_role_details::getLocker(opCtx)->isLocked());
     shard_role_details::swapLocker(opCtx, std::make_unique<Locker>(opCtx->getServiceContext()), lk);
 }
 
-void createTransactionCoordinator(OperationContext* opCtx,
+inline void createTransactionCoordinator(OperationContext* opCtx,
                                          TxnNumber clientTxnNumber,
                                          boost::optional<TxnRetryCounter> clientTxnRetryCounter) {
     auto clientLsid = opCtx->getLogicalSessionId().value();

src/mongo/db/vector_clock_mongod.h

@@ -43,7 +43,6 @@
 
 
 namespace mongo {
-namespace {
 
 class VectorClockMongoD : public VectorClockMutable,
                           public ReplicaSetAwareService<VectorClockMongoD> {
@@ -146,5 +145,4 @@ private:
     WaitableAtomic<bool> _taskIsRunning{false};
 };
 
-}  // namespace
 }  // namespace mongo

src/mongo/executor/async_rpc.h

@@ -298,13 +298,11 @@ ExecutorFuture<AsyncRPCResponse<typename CommandType::Reply>> sendCommandWithRun
 }
 }  // namespace detail
 
-namespace {
-void createOperationKeyIfNeeded(GenericArguments& genericArgs) {
+inline void createOperationKeyIfNeeded(GenericArguments& genericArgs) {
     if (!genericArgs.getClientOperationKey()) {
         genericArgs.setClientOperationKey(UUID::gen());
     }
 }
-}  // namespace
 
 /**
  * Execute the command asynchronously on the given target with the provided executor.

src/mongo/executor/mock_async_rpc.h

@@ -380,11 +380,11 @@ private:
     stdx::mutex _m;
 };
 
-std::ostream& operator<<(std::ostream& s, const AsyncMockAsyncRPCRunner::Request& o) {
+inline std::ostream& operator<<(std::ostream& s, const AsyncMockAsyncRPCRunner::Request& o) {
     return s << o.toBSON();
 }
 
-std::ostream& operator<<(std::ostream& s, const AsyncMockAsyncRPCRunner::Expectation& o) {
+inline std::ostream& operator<<(std::ostream& s, const AsyncMockAsyncRPCRunner::Expectation& o) {
     return s << o.name;
 }
 

src/mongo/executor/task_executor_cursor_test_fixture.h

@@ -56,8 +56,10 @@
  */
 namespace mongo {
 namespace executor {
-namespace {
-BSONObj buildCursorResponse(StringData fieldName, size_t start, size_t end, size_t cursorId) {
+inline BSONObj buildCursorResponse(StringData fieldName,
+                                   size_t start,
+                                   size_t end,
+                                   size_t cursorId) {
     BSONObjBuilder bob;
     {
         BSONObjBuilder cursor(bob.subobjStart("cursor"));
@@ -76,7 +78,7 @@ BSONObj buildCursorResponse(StringData fieldName, size_t start, size_t end, size
     return bob.obj();
 }
 
-BSONObj buildMultiCursorResponse(StringData fieldName,
+inline BSONObj buildMultiCursorResponse(StringData fieldName,
                                         size_t start,
                                         size_t end,
                                         std::vector<size_t> cursorIds) {
@@ -103,7 +105,6 @@ BSONObj buildMultiCursorResponse(StringData fieldName,
     bob.append("ok", 1);
     return bob.obj();
 }
-}  // namespace
 
 class NonPinningTaskExecutorCursorTestFixture : public ThreadPoolExecutorTest {
 public:

src/mongo/s/async_rpc_shard_retry_policy.h

@@ -37,10 +37,8 @@
 namespace mongo {
 namespace async_rpc {
 
-namespace {
 // See ARS::kMaxNumFailedHostRetryAttempts and Shard::kOnErrorNumRetries
-const int kOnErrorNumRetries = 3;
-}  // namespace
+inline const int kOnErrorNumRetries = 3;
 
 class ShardRetryPolicy : public RetryPolicy {
 public:

src/mongo/s/commands/cluster_abort_transaction_cmd.h

@@ -36,7 +36,6 @@
 #include "mongo/s/transaction_router.h"
 
 namespace mongo {
-namespace {
 
 /**
  * Implements the abortTransaction command for a router.
@@ -136,5 +135,4 @@ public:
     }
 };
 
-}  // namespace
 }  // namespace mongo

src/mongo/s/commands/cluster_commit_transaction_cmd.h

@@ -35,7 +35,6 @@
 #include "mongo/s/transaction_router.h"
 
 namespace mongo {
-namespace {
 
 /**
  * Implements the commitTransaction command for a router.
@@ -118,5 +117,4 @@ public:
     }
 };
 
-}  // namespace
 }  // namespace mongo

src/mongo/s/commands/internal_transactions_test_command.h

@@ -39,8 +39,6 @@
 
 namespace mongo {
 
-namespace {
-
 // TODO SERVER-86458
 // RAII object that switches an OperationContext's service role to the router role if it isn't
 // already and if the OperationContext's ServiceContext has a router role Service, restoring the
@@ -67,8 +65,6 @@ private:
     Service* _original;
 };
 
-}  // namespace
-
 template <typename Impl>
 class InternalTransactionsTestCommandBase : public TypedCommand<Impl> {
 public:

src/mongo/s/commands/query_cmd/cluster_count_cmd.h

@@ -57,12 +57,7 @@
 
 namespace mongo {
 
-namespace {
-
-// The # of documents returned is always 1 for the count command.
-static constexpr long long kNReturned = 1;
-
-BSONObj prepareCountForPassthrough(const BSONObj& cmdObj, bool requestQueryStats) {
+inline BSONObj prepareCountForPassthrough(const BSONObj& cmdObj, bool requestQueryStats) {
     if (!requestQueryStats) {
         return CommandHelpers::filterCommandRequestForPassthrough(cmdObj);
     }
@@ -72,8 +67,6 @@ BSONObj prepareCountForPassthrough(const BSONObj& cmdObj, bool requestQueryStats
     return CommandHelpers::filterCommandRequestForPassthrough(bob.done());
 }
 
-}  // namespace
-
 /**
  * Implements the find command on mongos.
  */
@@ -283,6 +276,9 @@ public:
         total = applySkipLimit(total, cmdObj);
         result.appendNumber("n", total);
 
+        // The # of documents returned is always 1 for the count command.
+        static constexpr long long kNReturned = 1;
+
         auto* curOp = CurOp::get(opCtx);
         curOp->setEndOfOpMetrics(kNReturned);
 

src/mongo/s/commands/query_cmd/cluster_find_cmd.h

@@ -56,12 +56,11 @@
 #include "mongo/s/query/planner/cluster_find.h"
 
 namespace mongo {
-namespace {
 /**
  * Parses the command object to a FindCommandRequest and validates that no runtime
  * constants were supplied and that querySettings was not passed into the command.
  */
-std::unique_ptr<FindCommandRequest> parseCmdObjectToFindCommandRequest(
+inline std::unique_ptr<FindCommandRequest> parseCmdObjectToFindCommandRequest(
     OperationContext* opCtx, const OpMsgRequest& request) {
     const auto& vts = auth::ValidatedTenancyScope::get(opCtx);
     auto findCommand = query_request_helper::makeFromFindCommand(
@@ -85,7 +84,6 @@ std::unique_ptr<FindCommandRequest> parseCmdObjectToFindCommandRequest(
 
     return findCommand;
 }
-}  // namespace
 
 /**
  * Implements the find command for a router.

src/mongo/s/commands/query_cmd/cluster_getmore_cmd.h

@@ -40,13 +40,12 @@
 #include "mongo/s/query/planner/cluster_find.h"
 
 namespace mongo {
-namespace {
 
 // getMore can run with any readConcern, because cursor-creating commands like find can run with any
 // readConcern.  However, since getMore automatically uses the readConcern of the command that
 // created the cursor, it is not appropriate to apply the default readConcern (just as
 // client-specified readConcern isn't appropriate).
-static const ReadConcernSupportResult kSupportsReadConcernResult{
+inline const ReadConcernSupportResult kSupportsReadConcernResult{
     Status::OK(),
     {{ErrorCodes::InvalidOptions,
       "default read concern not permitted (getMore uses the cursor's read concern)"}}};
@@ -167,5 +166,5 @@ public:
     }
 };
 
-}  // namespace
+
 }  // namespace mongo

src/mongo/s/commands/query_cmd/cluster_pipeline_cmd.h

@@ -39,7 +39,6 @@
 #include "mongo/s/query/planner/cluster_aggregate.h"
 
 namespace mongo {
-namespace {
 
 template <typename Impl>
 class ClusterPipelineCommandBase final : public Command {
@@ -223,5 +222,4 @@ public:
     }
 };
 
-}  // namespace
 }  // namespace mongo

src/mongo/util/dns_query_posix-impl.h

@@ -61,7 +61,6 @@ namespace mongo {
 namespace dns {
 // The anonymous namespace is safe, in this header, as it is not really a header.  It is only used
 // in the `dns_query.cpp` TU.
-namespace {
 
 using std::begin;
 using std::end;
@@ -377,8 +376,7 @@ private:
     static stdx::mutex _staticMutex;
 };
 
-stdx::mutex DNSQueryState::_staticMutex;
+inline stdx::mutex DNSQueryState::_staticMutex;
 
-}  // namespace
 }  // namespace dns
 }  // namespace mongo