The Gosu team is happy to announce the official release of Gosu 1.3 and Gosu Plugin 3.7 for IntelliJ 12.

Changes in this release

• Several bytecode/compiler performance improvements, for example
  • make string concatenation fast, no longer calls into the runtime.
  • optimize generated bytecode for expressions.
  • rewrite Block/Function-to-Interface coercion to be compiled statically.
  • support java generic signature bytecode in gosu compiled class file.
• Progress on the Gosu specification and relative test coverage.
• Support loading Gosu classes/types by source in multiple ClassLoaders i.e. , the entire chain. With this change Gosu classes are guaranteed to load in the same ClassLoader as Java classes declared alongside them.
• Removing the old <> operator, you must use != instead.

• Primitive types are now reserved keywords.

  function double() {} // It won't compile
  

• Variables declared in the using statement are implicitly final

  using(var d = new Disposable())
  {
    d = null // It's now Illegal
  }
  

• Remove wildcards. Gosu allowed you to use Java-like wildcards but it never supported them at the semantic level as, anyway, type parameters are covariant in Gosu. Wildacards were just syntactic sugar as shown by the following transformations:
  • from List<?> to List<Object>>
  • from List<? extends T> to List<T>>
  • from List<? super T> to List<UpperBound(T)>

The plugin is available from the JetBrains repository, which is directly accessible from your IntelliJ 12 plugins setup dialog. Select “Gosu”, right click and install (see this page more detailed instructions).