stephenberry/glaze v6.4.1

on GitHub

New formatting controls, TOML enum support, extended binary format validation, and SSL/TLS networking improvements.

Features

Float Formatting Control

New float_format option provides flexible control over floating-point precision in JSON output using C++23 std::format specifiers.

Global Option:

struct my_opts : glz::opts {
   static constexpr std::string_view float_format = "{:.2f}";
};

double pi = 3.14159265358979;
glz::write<my_opts{}>(pi); // "3.14"

Per-Member Wrapper:

template <>
struct glz::meta<my_type> {
   using T = my_type;
   static constexpr auto value = glz::object(
      "lat", glz::float_format<&T::latitude, "{:.4f}">,
      "lon", glz::float_format<&T::longitude, "{:.4f}">
   );
};

#2179

TOML Enum Support

Adds enum serialization and deserialization for TOML format, matching existing JSON enum functionality.

enum class Status { Pending, Active, Completed };

template <>
struct glz::meta<Status> {
   using enum Status;
   static constexpr auto value = glz::enumerate(Pending, Active, Completed);
};

Status s = Status::Active;
auto toml = glz::write_toml(s);  // Returns: "Active"

Status parsed;
glz::read_toml(parsed, R"("Completed")");  // parsed == Status::Completed

#2181

error_on_missing_keys for BEVE and MessagePack

The error_on_missing_keys option now works with BEVE and MessagePack formats, not just JSON. When enabled, deserialization fails with a missing_key error if required fields are absent. Optional/nullable fields (std::optional, std::unique_ptr) are still allowed to be missing.

#2184

SSL WebSocket and HTTPS Streaming Support

SSL/TLS support for WebSockets (WSS) and HTTPS streaming.

Key Features:

• WSS server support for secure WebSocket connections
• HTTPS streaming with streaming_connection_interface type erasure
• websocket_connection_interface for socket-type agnostic handlers
• SSL verify mode configuration for WebSocket clients
• ASIO 1.32+ compatibility fix for SSL streams

websocket_client client;
client.set_ssl_verify_mode(asio::ssl::verify_none);  // For self-signed certs
client.connect("wss://localhost:8443/ws");

#2165

Improvements

• API Consistency: Added glz::read_beve_untagged to match write_beve_untagged naming convention. read_binary_untagged is now deprecated. #2178
• GLIBCXX_USE_CXX11_ABI=0 Support: Glaze can now be used and tested with the legacy GCC ABI. #2160
• MessagePack Fuzz Testing: Added fuzz testing for MessagePack format. #2159

Bug Fixes

• Tagged Variant with Empty Structs: Fixed roundtrip failure for tagged variants containing empty struct types. #2180
• BEVE std::array<bool, N> Compilation: Fixed constexpr compilation error when serializing std::array<bool, N> with BEVE format. #2177
• Invalid Control Code Parsing: Fixed parsing of strings containing invalid control character sequences. #2169
• BEVE Skip Logic: Fixed bug where boolean and string typed arrays were handled incorrectly when skipping unknown keys in BEVE format. #2184

Full Changelog: v6.4.0...v6.4.1