h5cpp-compiler-v1.12.6

What's Changed

• [#36]:svarga:fix, regenerate h5 fixture goldens after producer output change by @steven-varga in #37

Full Changelog: v1.12.5...v1.12.6

h5cpp-compiler-v1.12.5

h5cpp-compiler v1.12.5 Release Notes

Full Changelog: v1.12.4...v1.12.5

What's New

h5cpp-compiler v1.12.5 is a major feature release that transforms the tool from a single-backend HDF5 descriptor generator into a unified multi-backend serialization compiler. This release adds 8 new output backends alongside a foundational attribute translator framework and a generic test harness.

New Features

Multi-Backend CLI (--format)

The compiler now supports a unified --format dispatcher with stubs and full implementations for 9 output formats:

• hdf5 (existing, enhanced)
• protobuf
• json
• msgpack
• cbor
• bson
• avro
• rlp
• sql_postgres, sql_mysql, sql_lite3

New Backends

Backend	Description	Issues
Protocol Buffers	Tier-1 producer with pb::encode/pb::decode matcher, attribute vocabulary with .proto text emitter, and clean [[pb::xxx()]] syntax	#30, #31
JSON Schema	Descriptor emitter with json::attribute support	#33
MessagePack	Descriptor emitter with msgpack::attribute support, ext type handling	#34
CBOR	Descriptor emitter with cbor::attribute support, tag handling	#35
BSON	Descriptor emitter with bson::attribute support, datetime/binary/decimal128 types	#36
Avro	Descriptor emitter with avro::attribute support, datetime/decimal/fixed types	#37
RLP	Descriptor emitter with rlp::attribute support	#38
SQL DDL	DDL producer for PostgreSQL, MySQL, and SQLite3 dialects with attribute taxonomy	#33

Enhanced HDF5 Backend

• Tier-2 scatter/gather attribute emission with h5::scatter / h5::gather support
• Full attribute vocabulary: h5::name, h5::ignore, h5::chunk, h5::compress, h5::on_missing, h5::serialize, h5::metadata

Attribute Translator Framework

• Source-level rewriter converting [[ns::name(...)]] annotations into [[clang::annotate("ns::name", ...)]] for all backend namespaces
• Virtual-file hook for pre-AST attribute translation
• Generic AST vector/string helpers

Testing & Quality

• Generic test runner with per-backend golden baseline support
• 73 total test fixtures across all backends:
  • 21 HDF5 base fixtures
  • 14 Protocol Buffers fixtures
  • 7 BSON fixtures
  • 7 Avro fixtures
  • 7 MessagePack fixtures
  • 6 CBOR fixtures
  • 5 RLP fixtures
  • 5 JSON Schema fixtures
  • 3 SQL DDL fixtures
• All tests passing on Linux (GCC/Clang), macOS (Apple Clang), and Windows (MSVC)

Released: May 2026

h5cpp-compiler-v1.12.4

Full Changelog: v1.12.3...v1.12.4

h5cpp-compiler-v1.12.3

What's Changed

• [#12]:svarga:ci, align CI matrix with h5cpp staging and replace HDF5 dep with LLVM toolchain by @steven-varga in #15
• [#13]:svarga:test, add transform fixture pack for coverage by @steven-varga in #16
• [#9]:svarga:refactor, emit compiler_meta_t and is_reflected_compound_t instead of register_struct by @steven-varga in #17
• [#6] Add Codecov coverage job to CI by @steven-varga in #11
• [#13]:svarga:test, add transform fixture pack for coverage by @steven-varga in #20
• [#14]:svarga:ci, add ASan and UBSan jobs with separate badges by @steven-varga in #21

Full Changelog: v1.0.2...v1.12.3

h5cpp-compiler-v1.0.2

• #1 levereged LLVM difference from 2020 to today (this is a work in progress)
• #2 added github pages based documentation framework
• #5 added github action continuous integration with compiler matrix
  Full Changelog: v1.0.2...v1.0.2

h5cpp-compiler-v1.0.1

original release from many years ago