Common Expression Language Files

High-Level Changes

• Enhanced JSON Interoperability: New support for JSON names across the checker, AST, and runtime allows for more seamless data handling when working with JSON-native structures.
• Improved Developer Tooling: Integration is now smoother thanks to new utilities for converting Go errors into cel.Issues and more descriptive, context-aware error messages.
• Greater Environment Flexibility: You can now redeclare variables as constants and export parse limit options, providing finer control over how CEL environments are configured and constrained.
• Native Struct Improvements: Support for mixing CEL and native values within native structs simplifies the handling of complex, hybrid data types.

🚀 Features

• Add helper method to check whether a function has a singleton binding in https://github.com/google/cel-go/pull/1266
• Helper utility for converting a Go error into cel.Issues in https://github.com/google/cel-go/pull/1267
• Policy API improvements in https://github.com/google/cel-go/pull/1268
• CEL Test usability requirements in https://github.com/google/cel-go/pull/1269
• Better context-related error messages in https://github.com/google/cel-go/pull/1271
• Sort env.Config values where reasonable in https://github.com/google/cel-go/pull/1273
• Support redeclaring variables as constants in NewEnv in https://github.com/google/cel-go/pull/1275
• Add support for exporting parse limit options in https://github.com/google/cel-go/pull/1277
• Support mixing CEL values and native values in native structs in https://github.com/google/cel-go/pull/1270
• Add checker, AST, and type-provider support for JSON names in https://github.com/google/cel-go/pull/1283
• JSON field names runtime support in https://github.com/google/cel-go/pull/1286
• Optionally include reachable fieldpaths in prompt in https://github.com/google/cel-go/pull/1285
• REPL -- cel-spec pb2 and json name support https://github.com/google/cel-go/pull/1294

🐞 Bug Fixes

• Fix support for config-based type references in https://github.com/google/cel-go/pull/1265
• Check arg kinds in optional.or and .orValue impl in https://github.com/google/cel-go/pull/1276
• Bazel fixes for import in https://github.com/google/cel-go/pull/1278
• Support zero-value literals in presence test inlining https://github.com/google/cel-go/pull/1280
• Cache concatList.Size() to prevent O(N^2) evaluation time https://github.com/google/cel-go/pull/1291
• Preserve runtime error node IDs from Resolve https://github.com/google/cel-go/pull/1290
• Default enable identifier escaping with backticks https://github.com/google/cel-go/pull/1295
• Cap format string precision to prevent memory exhaustion https://github.com/google/cel-go/pull/1292

🛠️ Maintenance & Internal

• chore: Migrate gsutil usage to gcloud storage in https://github.com/google/cel-go/pull/1274
• Lint fixes for exported function/type comments in https://github.com/google/cel-go/pull/1279
• Lint fixes for import in https://github.com/google/cel-go/pull/1287

Full Changelog: https://github.com/google/cel-go/compare/v0.27.0...v0.28.0-alpha