ydb/yql/essentials/core/langver, branch main

YQL-21408: Replace MakeLangVersion with features.json

2026-07-15T12:13:42Z

#### Replace MakeLangVersion with features.json-based feature system ✎ - Introduces a new feature system based on `features.json` to manage language version dependencies instead of hardcoded `MakeLangVersion` calls - Replaces direct language version checks with references to named features defined in JSON configuration - Adds validation and initialization logic for features to ensure version consistency - Updates all existing language version checks to use the new feature-based approach - Centralizes feature version definitions in a single JSON file for better maintainability and clarity Autodescription by Yandex Code Assistant commit_hash:fe9823c0442060337a30186fd957ae294f1aa1c2

YQL-21111: Introduce feature registry

2026-05-27T12:01:46Z

A feature registry lets us to reference features by name, rather than a concrete langver. It makes easier to find feature references and releasing incubating features (under max langver during the development). Features are described at `yql/essentials/data/language/features.json` and the C++ code is generated. The unit `feature.h` also introduces a convenience functions to check a feature availability and emit a standard error message. All features in the translator where replaced with named. commit_hash:c47f540536212a65f7bc5e8dc6051e73d006be8d

YQL-20086 invert flag

2025-10-10T14:08:12Z

commit_hash:a6b640bc576263b62884a0b4187ba79c893e13d9

YQL-20086 core (part1)

2025-10-08T15:42:53Z

commit_hash:12dbda4defcaef8dd708a69552fc19eba832ce2f

YQL-20068 backport mode

2025-06-10T20:55:56Z

commit_hash:4ad0e146a3e92836d6aec7eaac00ae0225484b09

YQL-19845 support of lang version checking inside facade

2025-04-16T18:26:52Z

commit_hash:5cfb2a0aa2904106df4ae69b9311bcc5a695928d