v6.0.2

New Features

• skip_if runtime value skipping in #2029

skip_if documentation

struct user_settings_t {
    std::string theme = "light";
    int volume = 50;
};

template <>
struct glz::meta<user_settings_t> {
    template <class T>
    static constexpr bool skip_if(T&& value, std::string_view key, const 
glz::meta_context&) {
        using V = std::decay_t<T>;
        if constexpr (std::same_as<V, std::string>) {
            return key == "theme" && value == "light";
        }
        else if constexpr (std::same_as<V, int>) {
            return key == "volume" && value == 50;
        }
        return false;
    }
};

• REPE to/from JSON RPC 2.0 in #2026

Improvements

• Support for nullable_value_t with BEVE in #2021
• Prevent Clang missing braces warnings in #2024

Fixes

• Fix websocket closing code and make it more robust by @stephenberry in #2020
• Fix a typo of a field declaration in unknown-keys.md by @ivanka2012 in #2017
• Fix integer UB by @stephenberry in #2023
• Write member functions when write_member_functions = true by @stephenberry in #2028

Full Changelog: v6.0.1...v6.0.2

v6.0.1

Improvements

• Strong ID and deeper cast support for use with map keys with BEVE by @stephenberry in #2002
• Improve parsing for TOML integers by @friedkeenan in #2007
• Better TOML skipping and thus unknown key handling by @stephenberry in #2013

Fixes

• Checking for Opts.comments when skipping ws to fix JSONC parse issue by @stephenberry in #2005
• Fixed read_constraint optional handling with missing-key option by @stephenberry in #2010

Full Changelog: v6.0.0...v6.0.1

v6.0.0

Breaking Changes

• Removed the experimental language interop from v5.6.0. All include/glaze/interop/* headers, the src/interop target, and associated tests have been deleted, and the glaze_BUILD_INTEROP CMake option no longer exists. #1976
• Renamed the dynamically typed glz::json_t to glz::generic (include/glaze/json/generic.hpp). #1984
• Streaming HTTP clients now surface server-side failures as category-aware std::error_code instances via glz::http_status_category(). Handlers that assumed generic networking errors should read the status code with glz::http_status_from.

Highlights

Reflection & Metadata

glz::meta::modify

• New glz::meta<T>::modify, letting you rename fields, add aliases, or append computed keys without re-declaring the full object (include/glaze/core/meta.hpp). See modify reflection guide.

• #1973

Self Constraints

• Validate the aggregate after deserialization by attaching a glz::self_constraint, which runs once all members have been populated and reports friendly messages on failure (include/glaze/core/constraint.hpp).

struct cross_constrained
{
   int age{};
   std::string name{};
};

template <>
struct glz::meta<cross_constrained>
{
   using T = cross_constrained;

   static constexpr auto combined = [](const T& v) {
      return ((v.name.starts_with('A') && v.age > 10) || v.age > 5);
   };

   static constexpr auto value = object(&T::age, &T::name);
   static constexpr auto self_constraint = glz::self_constraint<combined, "Age/name combination invalid">;
};

• #1981

glz::as_array wrapper

• Use glz::as_array<&T::member> when declaring metadata to serialize/deserialize aggregate members as positional arrays while keeping struct storage.

• by @stephenberry in #1992

Improvements

• More detailed status for http errors by @stephenberry in #1970
• Skip member functions when serializing. by @stephenberry in #1969
• Test gcc15 by @stephenberry in #1979
• glz::skip support for CSV format by @stephenberry in #1983
• CSV char parsing support by @stephenberry in #1989
• Make the return type of TOML match JSON code by @stephenberry in #1995
• CORS preflight requests succeed w/o user stubs by @stephenberry in #1997

Fixes

• Fix CSV parsing for signed integral min and named enums by @stephenberry in #1977
• jmespath fix for unterminated object by @stephenberry in #1978
• Use member_names to support modify and rename together by @stephenberry in #2000

Full Changelog: v5.7.2...v6.0.0

v5.7.2

Improvements

• Support other string key types in handle_unknown by @stephenberry in #1958
• Added PUT request support to HTTP client. by @klaussilveira in #1961
• Add Boost.Asio workflow by @azais-corentin in #1887
• Document with_signals for HTTP server by @stephenberry in #1952
• CSV support when lacking header by @stephenberry in #1945
• Extend csv fuzzer to cover also rowvise operations by @pauldreik in #1827
• Add fuzzer for json jmespath by @pauldreik in #1815
• Construct string_view explicitly by @CrackedMatter in #1963

Fixes

• made stencil spacing preservation more consistent inside section iteration ({{#items}} ... {{/items}}) by @StormLord07 in #1947
• Boost asio compatibility by @azais-corentin in #1948
• Fixed compile error when including both toml and json by @StormLord07 in #1949
• Bounds checking CSV read by @stephenberry in #1954
• Empty string char decoding by @stephenberry in #1957
• Add use method for http_server by @stephenberry in #1968

Full Changelog: v5.7.1...v5.7.2

v5.7.1

Improvements

• Faster BEVE compile time known key writing in #1933
• Prettify support for whitespace by @stephenberry in #1934
  • This enables prettified glz::raw_json to be used within glz::pretiffy_json calls

Fixes

• Treat HTTP header names as case-insensitive by @stephenberry in #1940
• Fix quick start doc error handling example by @stephenberry in #1941
• ID preservation for REPE errors by @stephenberry in #1946

Full Changelog: v5.7.0...v5.7.1

v5.7.0

Better Support for Raw Pointer and Pure Reflection

• Raw pointers now follow the skip_null_members option for reflected structs
• Fixes a segfault for raw pointers with purely reflected structs (now skips or writes out null based on options)
• Better support for pure reflection and raw pointers by @stephenberry in #1927

Improvements

• New glz::has_reflect concept to check if glz::reflect<T> is applicable in #1929
• Variant tag validation for auto-deduced structs by @stephenberry in #1919
• Support for read_binary_untagged with static tags by @stephenberry in #1928
• Support for tagged variants with default case by @stephenberry in #1921

Glaze now supports a default/catch-all variant type by making the ids array shorter than the number of variant alternatives. The first unlabeled type (without a corresponding ID) becomes the default handler for unknown tags.

See Variant Handling for more documentation

Fixes

• Fix for partial_read when error_on_missing_keys is true by @stephenberry in #1922

Full Changelog: v5.6.1...v5.7.0

v5.6.1

Better std::variant support

Read the updated documentation for handling variants

• Support purely reflected structs in variants by @stephenberry in #1913
• Support variant determination via parsability by @stephenberry in #1916

Other Improvements

• Properly specifying REPE formats and validating by @stephenberry in #1908
• Support for std::optional with glz::cast by @stephenberry in #1910

Full Changelog: v5.6.0...v5.6.1

v5.6.0

New Features

C shared library interop (FFI) using Glaze and modern C++ reflection in #1890

Documentation: https://stephenberry.github.io/glaze/interop/

Key transformers in #1889

struct my_struct {
   int user_id = 123;
   std::string first_name = "John";
};

// Apply camelCase transformation
template <>
struct glz::meta<my_struct> : glz::camel_case {};

// JSON output: {"userId":123,"firstName":"John"}

8 Naming Convention Transformers:
camel_case: snake_case → camelCase
pascal_case: snake_case → PascalCase
snake_case: camelCase/PascalCase → snake_case
screaming_snake_case: any → SCREAMING_SNAKE_CASE
kebab_case: any → kebab-case
screaming_kebab_case: any → SCREAMING-KEBAB-CASE
lower_case: any → lowercase
upper_case: any → UPPERCASE

Zero Runtime Overhead: All transformations occur at compile-time through constexpr functions

Use smallest object when encountering ambiguous variants in #1903

Previously, when multiple variant types had overlapping fields (e.g., one type being a subset of
another), Glaze would fail with error_code::no_matching_variant_type. This was particularly
problematic for common patterns like:

• Progressive detail levels (BasicInfo → DetailedInfo → FullInfo)
• Optional field patterns where simpler types are subsets of complex ones
• API versioning where newer types extend older ones

The resolution strategy:

During JSON parsing, when multiple object types in a variant match all their required fields, the type with the minimum field count is automatically selected. This ensures the most specific/appropriate type is chosen.

Improvements

• Remove unneeded CMake VS Code extension from devcontainer by @kaladron in #1893
• devcontainer version updates by @kaladron in #1894
• Update Dockerfile to use official devcontainer image by @kaladron in #1897
• Update CMakePresets.json to use system GCC and G++ compilers by @kaladron in #1899
• glz::json_t struct assignment by @stephenberry in #1902
• Add title and required to generated JSON schema by @oleid in #1850

Full Changelog: v5.5.5...v5.6.0

v5.5.5

Improvements

• Add support for the Boost version of Asio by @azais-corentin in #1863
• Openapi schema by @stephenberry in #1864
• REPE Spec Updates by @stephenberry in #1869
• Faster BEVE serialization for complex typed arrays by @stephenberry in #1872
• JSON: Support reading tuples in variants by @makekryl in #1874
• Network Signal Handling by @stephenberry in #1882

Fixes

• Fix usage of removed function in newer asio versions by @azais-corentin in #1861
• Fix incorrect error message on missing required key by @oleid in #1867
• Read toml tests fixes by @StormLord07 in #1876
• undef Windows.h DELETE macro by @stephenberry in #1878
• Fix MSVC errors by @stephenberry in #1879

Full Changelog: v5.5.4...v5.5.5

v5.5.4

Improvements

• const paths for registry and support for const variables in registry by @stephenberry in #1855
• OpenAPI endpoint for glz::http_server @stephenberry in #1856

Fixes

• Fix use after move in websocket handshake method by @TheCoconutChef in #1857
• write_beve_untagged(T&&) fix by @stephenberry in #1859

Full Changelog: v5.5.3...v5.5.4