On Aug 6, 2010, at 9:32 PM, Howard Lovatt wrote:
> There is a minor bug when you use -Xlint:all, I get:
>
> Compiling 1 source file to
> /Users/lov080/Dropbox/Personal/Java/examples/Invoke Dynamic Multiple
> Dispatch/build/classes
> /Users/lov080/Dropbox/Personal/Java/examples/Invoke Dynamic Multiple
> Dispatch/src/invokedynamicmultipledispatch/Cost.java:61: warning: [rawtypes]
> found raw type: Class
> cost += InvokeDynamic.<@BootstrapMethod( value = Cost.class, name =
> "bootstrapDynamic" ) double>cost( price, item );
> missing type parameters for generic class Class<T>
> where T is a type-variable:
> T extends Object declared in class Class
>
> -- Howard.
>
> PS Is this the right place to report MLVM bugs?
This is a good place to report MLVM bugs.
Also, I suggest moving the @BootstrapMethod annotation to an enclosing class or
method. We are probably going to get rid of the explicit return type
occurrences ('double' in your case) and this means the annotation has to float
up to the method or class level.
(To put different BSMs on successive indy sites, factor them into different
methods, or spin the bytecodes directly.)
Here is a "heads up" about the type arguments: The explicit return types will
be replaced by a target-typing rule. This will reduce the impact of 292 on the
language and also create a clearer notation. Our source codes will have to
change from expressions like InvokeDynamic.<T>foo() to (T) InvokeDynamic.foo(),
and likewise for method handle invokes.
The cast will be optional (like the type argument) if T is Object. The call
will have to be an ExpressionStatement and only if T is void (since no cast is
possible). To take a non-void return and throw it away, use a temporary
variable (as the JLS suggests).
We'll support both forms for a little while. Watch for warnings on the type
argument!
-- John
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