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Considering our limited human resources and time constraints, it is hard to give definitive and accurate estimates of the milestones we are going to release.

Tentative Roadmap

Groovy 1.7.x

Releases

  • incremental bug fix releases through 2010

Groovy 1.8.x

Feature set

Here are a few topics we're considering for Groovy 1.8 and beyond.

  • internal runtime optimization
  • extended command expression (GEP-3)
  • extended annotations (closures, lists, maps, ranges)
  • support for joint compilation of AST transformations
  • modularity of Groovy (splitting Groovy in smaller JARs on a per feature basis)
  • work related to JDK 7
    • notes on JDK 7 and JDK 8 future
    • usage of invokedynamic and annonymous classloader (JDK7 features)
    • updates for JDK 7 language features (aka Project Coin)
    • retrofitting Groovy closures to accomodate JDK 7 upcoming closures for interoperability
  • a native template engine compiling to AST (faster, correct line numbers for error reporting, optimized outputting, etc.)
  • experiments
    • with pattern matching (to be started as a module)
    • with parser combinators (to be started as module)

Releases

  • Groovy 1.8-beta-1: July 2010
  • Groovy 1.8-beta-2: September 2010
  • Groovy 1.8-beta-3: October 2010
  • Groovy 1.8-beta-4: November 2010
  • Groovy 1.8-beta-5: December 2010
  • Groovy 1.8-RC-1: Early-January 2010
  • Groovy 1.8-RC-2: End-January 2011
  • Groovy 1.8 GA: February 2011

Groovy 2.0

Feature set

  • New Meta-Object Protocol
  • Incremental compiler

Other topics we could consider for Groovy 1.8, 2.0 and beyond

  • ability to pass expression trees / AST nodes as parameters (see C# 4's own expression tree)
  • lexical categories
  • a symbol concept, a bit like Ruby's :symbol, or like Java interned strings
  • co-routines and/or generators
  • tail-call recursion
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