JDK-6939780 : add a warning to detect diamond sites
  • Type: Enhancement
  • Component: tools
  • Sub-Component: javac
  • Affected Version: 7
  • Priority: P3
  • Status: Closed
  • Resolution: Fixed
  • OS: generic
  • CPU: unknown
  • Submitted: 2010-03-31
  • Updated: 2011-03-08
  • Resolved: 2011-03-08
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JDK 7
7 b118Fixed
Related Reports
Relates :  
JDK-6880112 - Project Coin: Port JDK core library code to use diamond operator
Description
Add a warning that detects diamond sites:

class Foo<T> {
Foo(T t) {}
}

Foo<String> fs = new Foo<String>();  //compiler should optionally issue a warning here
Comments
EVALUATION http://hg.openjdk.java.net/jdk7/build/langtools/rev/fadc6d3e63f4
04-12-2010
SUGGESTED FIX A webrev of this fix is available at the following URL: http://hg.openjdk.java.net/jdk7/tl/langtools/rev/fadc6d3e63f4
02-11-2010
EVALUATION We should issue an optional warning when the type S inferred by the diamond operator (not available in the user code) is substitutable for the type explicitly occurring in the user code.
31-03-2010