sourcemeta · jviotti · Aug 20, 2026 · Aug 20, 2026
diff --git a/src/core/gzip/include/sourcemeta/core/gzip_error.h b/src/core/gzip/include/sourcemeta/core/gzip_error.h
@@ -15,6 +15,7 @@ namespace sourcemeta::core {
 // safe
 // https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4275?view=msvc-170&redirectedfrom=MSDN
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251 4275)
 #endif
 
@@ -37,7 +38,7 @@ class SOURCEMETA_CORE_GZIP_EXPORT GZIPError : public std::exception {
 };
 
 #if defined(_MSC_VER)
-#pragma warning(default : 4251 4275)
+#pragma warning(pop)
 #endif
 
 } // namespace sourcemeta::core

diff --git a/src/core/gzip/include/sourcemeta/core/gzip_streambuf.h b/src/core/gzip/include/sourcemeta/core/gzip_streambuf.h
@@ -34,12 +34,13 @@ class SOURCEMETA_CORE_GZIP_EXPORT GZIPStreamBuffer : public std::streambuf {
 // safe.
 // https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4275?view=msvc-170&redirectedfrom=MSDN
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251)
 #endif
   struct Internal;
   std::unique_ptr<Internal> internal_;
 #if defined(_MSC_VER)
-#pragma warning(default : 4251)
+#pragma warning(pop)
 #endif
 };
 

diff --git a/src/core/html/include/sourcemeta/core/html_buffer.h b/src/core/html/include/sourcemeta/core/html_buffer.h
@@ -83,11 +83,12 @@ class SOURCEMETA_CORE_HTML_EXPORT HTMLBuffer {
 // safe.
 // https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4275?view=msvc-170&redirectedfrom=MSDN
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251)
 #endif
   std::string buffer_;
 #if defined(_MSC_VER)
-#pragma warning(default : 4251)
+#pragma warning(pop)
 #endif
   char *cursor_{nullptr};
   char *end_{nullptr};

diff --git a/src/core/html/include/sourcemeta/core/html_writer.h b/src/core/html/include/sourcemeta/core/html_writer.h
@@ -99,6 +99,7 @@ class SOURCEMETA_CORE_HTML_EXPORT HTMLWriter {
 // safe.
 // https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4275?view=msvc-170&redirectedfrom=MSDN
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251)
 #endif
 
@@ -470,7 +471,7 @@ class SOURCEMETA_CORE_HTML_EXPORT HTMLWriter {
   bool tag_open_{false};
   bool tag_open_is_void_{false};
 #if defined(_MSC_VER)
-#pragma warning(default : 4251)
+#pragma warning(pop)
 #endif
 };
 

diff --git a/src/core/http/include/sourcemeta/core/http_error.h b/src/core/http/include/sourcemeta/core/http_error.h
@@ -19,6 +19,7 @@ namespace sourcemeta::core {
 // safe.
 // https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4275?view=msvc-170&redirectedfrom=MSDN
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251 4275)
 #endif
 
@@ -93,7 +94,7 @@ class SOURCEMETA_CORE_HTTP_EXPORT HTTPStatusError : public HTTPError {
 };
 
 #if defined(_MSC_VER)
-#pragma warning(default : 4251 4275)
+#pragma warning(pop)
 #endif
 
 } // namespace sourcemeta::core

diff --git a/src/core/http/include/sourcemeta/core/http_system.h b/src/core/http/include/sourcemeta/core/http_system.h
@@ -28,6 +28,7 @@ namespace sourcemeta::core {
 // safe.
 // https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4275?view=msvc-170&redirectedfrom=MSDN
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251 4275)
 #endif
 
@@ -332,7 +333,7 @@ class SOURCEMETA_CORE_HTTP_EXPORT HTTPSystemRequest {
 };
 
 #if defined(_MSC_VER)
-#pragma warning(default : 4251 4275)
+#pragma warning(pop)
 #endif
 
 } // namespace sourcemeta::core

diff --git a/src/core/jose/include/sourcemeta/core/jose_error.h b/src/core/jose/include/sourcemeta/core/jose_error.h
@@ -10,6 +10,7 @@
 namespace sourcemeta::core {
 
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251 4275)
 #endif
 
@@ -50,7 +51,7 @@ class SOURCEMETA_CORE_JOSE_EXPORT JWEParseError : public std::exception {
 };
 
 #if defined(_MSC_VER)
-#pragma warning(default : 4251 4275)
+#pragma warning(pop)
 #endif
 
 } // namespace sourcemeta::core

diff --git a/src/core/jose/include/sourcemeta/core/jose_jwe.h b/src/core/jose/include/sourcemeta/core/jose_jwe.h
@@ -100,6 +100,7 @@ class SOURCEMETA_CORE_JOSE_EXPORT JWE {
   static auto parse(const std::string_view input, JWE &result) -> bool;
 
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251)
 #endif
   std::string protected_header_;
@@ -111,7 +112,7 @@ class SOURCEMETA_CORE_JOSE_EXPORT JWE {
   std::optional<JWEAlgorithm> algorithm_;
   std::optional<JWEEncryption> encryption_;
 #if defined(_MSC_VER)
-#pragma warning(default : 4251)
+#pragma warning(pop)
 #endif
 };
 

diff --git a/src/core/jose/include/sourcemeta/core/jose_jwk.h b/src/core/jose/include/sourcemeta/core/jose_jwk.h
@@ -142,6 +142,7 @@ class SOURCEMETA_CORE_JOSE_EXPORT JWK {
   static auto parse(const JSON &value, JWK &result) -> bool;
 
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251)
 #endif
   Type type_{Type::RSA};
@@ -156,7 +157,7 @@ class SOURCEMETA_CORE_JOSE_EXPORT JWK {
   std::string coordinate_y_;
   std::string public_point_;
 #if defined(_MSC_VER)
-#pragma warning(default : 4251)
+#pragma warning(pop)
 #endif
 };
 

diff --git a/src/core/jose/include/sourcemeta/core/jose_jwk_private.h b/src/core/jose/include/sourcemeta/core/jose_jwk_private.h
@@ -145,6 +145,7 @@ class SOURCEMETA_CORE_JOSE_EXPORT JWKPrivate {
   static auto parse(const JSON &value, JWKPrivate &result) -> bool;
 
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251)
 #endif
   Type type_{Type::RSA};
@@ -159,7 +160,7 @@ class SOURCEMETA_CORE_JOSE_EXPORT JWKPrivate {
   std::string coordinate_y_;
   std::string public_point_;
 #if defined(_MSC_VER)
-#pragma warning(default : 4251)
+#pragma warning(pop)
 #endif
 };
 

diff --git a/src/core/jose/include/sourcemeta/core/jose_jwks.h b/src/core/jose/include/sourcemeta/core/jose_jwks.h
@@ -82,11 +82,12 @@ class SOURCEMETA_CORE_JOSE_EXPORT JWKS {
   static auto parse(const JSON &value, JWKS &result) -> bool;
 
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251)
 #endif
   std::vector<JWK> keys_;
 #if defined(_MSC_VER)
-#pragma warning(default : 4251)
+#pragma warning(pop)
 #endif
 };
 

diff --git a/src/core/jose/include/sourcemeta/core/jose_jwks_provider.h b/src/core/jose/include/sourcemeta/core/jose_jwks_provider.h
@@ -156,6 +156,7 @@ class SOURCEMETA_CORE_JOSE_EXPORT JWKSProvider {
       -> std::shared_ptr<const JWKS>;
 
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251)
 #endif
   const std::string jwks_uri_;
@@ -167,7 +168,7 @@ class SOURCEMETA_CORE_JOSE_EXPORT JWKSProvider {
   std::chrono::system_clock::time_point next_refresh_{};
   std::chrono::system_clock::time_point unknown_kid_cooldown_until_{};
 #if defined(_MSC_VER)
-#pragma warning(default : 4251)
+#pragma warning(pop)
 #endif
 };
 

diff --git a/src/core/jose/include/sourcemeta/core/jose_jwt.h b/src/core/jose/include/sourcemeta/core/jose_jwt.h
@@ -120,6 +120,7 @@ class SOURCEMETA_CORE_JOSE_EXPORT JWT {
   static auto parse(const std::string_view input, JWT &result) -> bool;
 
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251)
 #endif
   std::string_view signing_input_;
@@ -128,7 +129,7 @@ class SOURCEMETA_CORE_JOSE_EXPORT JWT {
   JSON payload_{nullptr};
   std::optional<JWSAlgorithm> algorithm_;
 #if defined(_MSC_VER)
-#pragma warning(default : 4251)
+#pragma warning(pop)
 #endif
 };
 

diff --git a/src/core/json/include/sourcemeta/core/json_array.h b/src/core/json/include/sourcemeta/core/json_array.h
@@ -111,11 +111,12 @@ template <typename Value> class JSONArray {
 // safe.
 // https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4275?view=msvc-170&redirectedfrom=MSDN
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251)
 #endif
   Container data_;
 #if defined(_MSC_VER)
-#pragma warning(default : 4251)
+#pragma warning(pop)
 #endif
 };
 

diff --git a/src/core/json/include/sourcemeta/core/json_error.h b/src/core/json/include/sourcemeta/core/json_error.h
@@ -18,6 +18,7 @@ namespace sourcemeta::core {
 // safe.
 // https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4275?view=msvc-170&redirectedfrom=MSDN
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251 4275)
 #endif
 
@@ -93,7 +94,7 @@ class SOURCEMETA_CORE_JSON_EXPORT JSONFileParseError : public JSONParseError {
 };
 
 #if defined(_MSC_VER)
-#pragma warning(default : 4251 4275)
+#pragma warning(pop)
 #endif
 
 } // namespace sourcemeta::core

diff --git a/src/core/json/include/sourcemeta/core/json_object.h b/src/core/json/include/sourcemeta/core/json_object.h
@@ -822,12 +822,13 @@ template <typename Key, typename Value, typename Hash> class JSONObject {
 // safe.
 // https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4275?view=msvc-170&redirectedfrom=MSDN
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251)
 #endif
   static constexpr Hash HASHER{};
   underlying_type data_;
 #if defined(_MSC_VER)
-#pragma warning(default : 4251)
+#pragma warning(pop)
 #endif
 };
 

diff --git a/src/core/json/include/sourcemeta/core/json_value.h b/src/core/json/include/sourcemeta/core/json_value.h
@@ -2479,6 +2479,7 @@ class SOURCEMETA_CORE_JSON_EXPORT JSON {
 // safe.
 // https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4275?view=msvc-170&redirectedfrom=MSDN
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251)
 #endif
   union {
@@ -2495,7 +2496,7 @@ class SOURCEMETA_CORE_JSON_EXPORT JSON {
   // footprint
   static_assert(sizeof(Decimal) <= sizeof(String));
 #if defined(_MSC_VER)
-#pragma warning(default : 4251)
+#pragma warning(pop)
 #endif
   auto maybe_destruct_union() -> void;
 };

diff --git a/src/core/jsonl/include/sourcemeta/core/jsonl.h b/src/core/jsonl/include/sourcemeta/core/jsonl.h
@@ -87,13 +87,14 @@ class SOURCEMETA_CORE_JSONL_EXPORT JSONL {
 // safe.
 // https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4275?view=msvc-170&redirectedfrom=MSDN
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251)
 #endif
   std::basic_istream<JSON::Char, JSON::CharTraits> *stream_;
   struct Internal;
   std::unique_ptr<Internal> internal_;
 #if defined(_MSC_VER)
-#pragma warning(default : 4251)
+#pragma warning(pop)
 #endif
 };
 

diff --git a/src/core/jsonl/include/sourcemeta/core/jsonl_iterator.h b/src/core/jsonl/include/sourcemeta/core/jsonl_iterator.h
@@ -49,14 +49,15 @@ class SOURCEMETA_CORE_JSONL_EXPORT ConstJSONLIterator {
 // safe.
 // https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4275?view=msvc-170&redirectedfrom=MSDN
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251)
 #endif
   // Use PIMPL idiom to hide internal details, mainly
   // templated members, which are tricky to DLL-export.
   struct Internal;
   std::unique_ptr<Internal> internal_{};
 #if defined(_MSC_VER)
-#pragma warning(default : 4251)
+#pragma warning(pop)
 #endif
 };
 

diff --git a/src/core/jsonld/include/sourcemeta/core/jsonld_error.h b/src/core/jsonld/include/sourcemeta/core/jsonld_error.h
@@ -18,6 +18,7 @@ namespace sourcemeta::core {
 // safe.
 // https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4275?view=msvc-170&redirectedfrom=MSDN
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251 4275)
 #endif
 
@@ -82,7 +83,7 @@ class SOURCEMETA_CORE_JSONLD_EXPORT JSONLDFragmentError : public JSONLDError {
 };
 
 #if defined(_MSC_VER)
-#pragma warning(default : 4251 4275)
+#pragma warning(pop)
 #endif
 
 } // namespace sourcemeta::core

diff --git a/src/core/jsonpath/include/sourcemeta/core/jsonpath_error.h b/src/core/jsonpath/include/sourcemeta/core/jsonpath_error.h
@@ -14,6 +14,7 @@ namespace sourcemeta::core {
 // safe.
 // https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4275?view=msvc-170&redirectedfrom=MSDN
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251 4275)
 #endif
 
@@ -39,7 +40,7 @@ class SOURCEMETA_CORE_JSONPATH_EXPORT JSONPathParseError
 };
 
 #if defined(_MSC_VER)
-#pragma warning(default : 4251 4275)
+#pragma warning(pop)
 #endif
 
 } // namespace sourcemeta::core

diff --git a/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_position.h b/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_position.h
@@ -89,13 +89,14 @@ class SOURCEMETA_CORE_JSONPOINTER_EXPORT PointerPositionTracker {
 // safe.
 // https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4275?view=msvc-170&redirectedfrom=MSDN
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251)
 #endif
   std::vector<Event> events_;
   mutable bool indexed_{false};
   mutable std::vector<TrieNode> trie_;
 #if defined(_MSC_VER)
-#pragma warning(default : 4251)
+#pragma warning(pop)
 #endif
 };
 

diff --git a/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_walker.h b/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_walker.h
@@ -76,11 +76,12 @@ template <typename PointerT> class GenericPointerWalker {
 // safe.
 // https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4275?view=msvc-170&redirectedfrom=MSDN
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251)
 #endif
   internal pointers_;
 #if defined(_MSC_VER)
-#pragma warning(default : 4251)
+#pragma warning(pop)
 #endif
 };
 

diff --git a/src/core/oauth/include/sourcemeta/core/oauth_device.h b/src/core/oauth/include/sourcemeta/core/oauth_device.h
@@ -21,6 +21,7 @@
 namespace sourcemeta::core {
 
 #if defined(_MSC_VER)
+#pragma warning(push)
 #pragma warning(disable : 4251)
 #endif
 
@@ -185,7 +186,7 @@ class SOURCEMETA_CORE_OAUTH_EXPORT OAuthDevicePoller {
 };
 
 #if defined(_MSC_VER)
-#pragma warning(default : 4251)
+#pragma warning(pop)
 #endif
 
 /// @ingroup oauth