Danger Will Robinson! Missing API!

[Ola Bini]

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On 2011-05-26 10.33, Charles Oliver Nutter wrote:
> Oh my goodness...I just realized an obvious missing API...is there still time?!
> 
> SwitchPoint has no way to query if it has been invalidated!
> 
> Is this by design? I would like to use this as both a call site guard
> and as a queryable trigger...to know whether I can go forward with the
> faster SwitchPoint-based logic or not.
> 
> So, am I missing something, or is the API missing something?
> 
> SwitchPoint.isValid()boolean: Returns true if this SwitchPoint is
> still valid (i.e. has not yet been invalidated).

Take a look at the way I use SwitchPoints in Seph. The api you're
looking for is already there:

SwitchPoint x = new SwitchPoint();
MethodHandle valid =
x.guardWithTest(MethodHandles.constant(boolean.class, true),
MethodHandle.constant(boolean.class, false));

System.err.println("Still valid: " + valid.invoke());
SwitchPoint.invalidateAll(new SwitchPoint[]{x});
System.err.println("Now not valid: " + valid.invoke());

Cheers
- -- 
 Ola Bini (http://olabini.com)
  Ioke - JRuby - ThoughtWorks

 "Yields falsehood when quined" yields falsehood when quined.

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