[2026-01-05] Libs and Engine Team Demo Day

[GregoryTravis]

Greg:

• Fix for add_group_number with Equal_Count Fix for add_group_number with Equal_Count #14520
• Implement Grouping_Method.Equal_Sum for database backends Implement Grouping_Method.Equal_Sum for database backends #14528
• Fix Private_Access_Error in Ordered_Multi_Value_Key Fix Private_Access_Error in Ordered_Multi_Value_Key #14543
• Implement Grouping_Method.Standard_Deviation for database backends Implement Grouping_Method.Standard_Deviation for database backends #14546

Ad:

• Remove file contents for release Remove file contents for release #14538
• Add Salesforce OAuth Old MR Add Salesforce OAuth #14550

Pavel:

• Upload / download an extension library:
  • Integration test for downloading a library from ZIP Integration test for downloading a library from ZIP #14486
  • Remove --update-manifest Remove --update-manifest #14542
  • Move Standard.Image out of distribution Move Standard.Image out of distribution #14553
• Other stuff:
  • Fix structural pattern match on intersection types Fix structural pattern match on intersection types #14498
  • Pattern match does not evaluate suspended atom fields Pattern match does not evaluate suspended atom fields #14525
  • Do not depend on Wikipedia in test Do not depend on Wikipedia in test #14545
  • Refactor Pattern Scala IR to Java Refactor Pattern Scala IR to Java #14548
  • IR processor generates fully qualified names IR processor generates fully qualified names #14549

Dmitry:

• Replace language server WebSocket connection with Ydoc Replace language server WebSocket connection with Ydoc #14438
• Show errors in headless environments Show errors in headless environments #14537

[JaroslavTulach]

Dual JVM

• Run Standard.Microsoft in dual JVM mode Run Standard.Microsoft in dual JVM mode #14476
• Run Standard.Snowflake in dual JVM mode Run Standard.Snowflake in dual JVM mode #14474

Improving the Language

• Expanding syntax of if_then_else Allow multiline if then else #14522

Lazy Evaluation

• Motivation: Running single test is slow!
• Lazy evaluation of pending Make Standard.Test pending field lazy #14536
• Syntax for lazy local variables deferred for now: Make sure suspended blocks are evaluated only once #14530
• Instead provide Ref.memoize: Ref.new lazy=True to defer initialization of Ref'ed value #14554

Instrumentation, Visualizations, Batch Execution Analysis

• Reads/Writes tracing Trace local variable read/write via Truffle instrumentation #14540
  • proposing upstream Enhancing Insight to allow tracking of reads/writes of local variables oracle/graal#12760
• Recording & Post Mortem Analysis Experiment

Robustness

• Avoid Semaphore and TruffleSafepoint Avoid Semaphore and TruffleSafepoint #14521
• Use realpath to resolve symlinks Use realpath to resolve symlinks #14531
• Propagate context from real node to DataflowError constructor Propagate context from real node to DataflowError constructor #14535
• Separating Root and RootBody nodes to support unwinding Separating Root and RootBody nodes to support unwinding #14541