Release Notes

• asncpp runtime — AVN, JER, and constraint-handling fixes aligned with the other runtimes; DEFAULT values back-filled for absent BER SEQUENCE/SET members; a raised decode-depth limit with a new DECODE_DEPTH_EXCEEDED error.
• asncpp codegen — integer/real mapping options honored correctly with INTEGER overflow fixed; list-alias and composite-alias member headers fixed.

• BER extension additions — emitted in ascending component order; extension-addition groups are no longer all-or-nothing on encode; multi-octet context tags keep auto-tag numbers ≥ 31 unique.
• Open type — CONTAINING keyword dropped in favor of inlined AVN contained values; formal (dummy) parameters tagged explicitly under AUTOMATIC TAGS.
• Table constraints — table-constraint selectors encoded with the class-field type.

• OER integers — extensible INTEGERs now encode as signed values and sign octets are stripped correctly from variable-length unsigned values across runtimes.
• EXCEPT (Difference) constraints — mirrored across the C++, C#, and Go runtimes.
• Open types — PER open-type (CONTAINING) CONTENT fragmentation mirrored across runtimes; parameterized inner-type CONTAINING materialized per site.
• INTEGER named numbers — carried into runtime metadata and AVN; named BIT STRINGs rendered as named-bit lists.
• Configuration — ASNSDK_CONFIG_HOME env var supported for the SDK config directory.
• Extension additions — absent mandatory extension additions elided via the nullable-extension-additions option (asncsc, asncpp).
• SET OF encoding — OER SET OF values canonicalized for round-trip consistency.

• Semantic constraints — runtime metadata enriched with a full semantic-constraint payload across Java, C++, C#, and Go; WITH COMPONENTS presence constraints honored end-to-end.
• AVN CONTAINING — open-type CONTAINING encoding ported to the C runtime, and then to the C++, C#, and Go runtimes.
• DER decode — bit strings re-padded to their SIZE bound on decode in asncpp.
• Errors — descriptive AtNotation errors reported instead of a generic table-constraint failure.

• Parser — Word-invisible Unicode characters (for example NBSP) are now treated as whitespace.
• Core — deferred value-reference INTEGER and size-bound resolution, and SEQUENCE OF / SET OF size constraints preserved in compiled metadata.
• CLI — asndt now notifies you when a new version is available.

• Fixed-type table constraints — member-row selection support added to the asnjc, asncpp, asncsc, and asngc plugins and runtimes.
• BER open-type fixes — a shared OCTET/BIT STRING codec with open types, correct CER segmentation for BER open types, and contained-value decoding across runtimes.
• OER integers — value-based unsigned octet counts and a fix for zero-length unaligned constrained integers across runtimes.

• Core semantic fixes — requeue object-set references that aren’t yet resolvable, empty-set and union object-set handling, parameterized-type parent scoping, cross-module value-type resolution, and the implicit-parameter reference (@.id) correction.
• generate-contained — new option enabling CONTAINING open-type support for the C, C++, and C# plugins, including per-component CONTAINING inside WITH COMPONENTS.
• Runtime metadata — label/comment metadata for components, alternatives, and extension-addition types across the Java, C++, and C# runtimes.

• CLI — new asndt clean subcommand.
• Generated-code alignment — open-type variant handling, CHOICE constructors, and standalone SEQUENCE OF / SET OF wrappers aligned across Java, C, C++, C#, and Go.
• Licensing — a license-migration path for existing customers to move to the current activation model.
• Compiler config — a new product-id field matches a license product instead of by language.
• Core fixes — table-constraint resolution for enriched class-field types and a null-pointer fix in the C generic encoder.

• C++ codegen — CHOICE/UNION mapping fixes: copy/move constructors and destructors generated for mapped union choices, and a UnionChoiceConverter double-indirection bug fixed.

The founding release establishes the complete ASN.1 development toolchain.

• Core engine — project-based ASN.1 project model (asn1.avn), semantic model, builder, and the asndt CLI (create / compile / license).
• Compiler plugins — full code generators for Java, C, C++, C#, and Go, each with a matching runtime library.
• Runtimes — PER, BER, and OER codecs plus constraint evaluation across all five target languages.
• Licensing — per-product activation with a straightforward asndt license workflow.