Re: new module

[Andrew John Hughes <gnu_andrew@member.fsf.org>]

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On Wed, 2006-06-21 at 12:54 +0200, Mark Wielaard wrote:
> On Wed, 2006-06-21 at 09:45 +0100, Andrew John Hughes wrote:
> > Hallelujah! We might finally see the result of Tom's concurrency patch.
> 
> :) We might, but apart from one small typo in the Ecj build script,
> fixed as follows:
> 
> 2006-06-21  Mark Wielaard  <mark@klomp.org>
> 
>         * Ecj: Fix jikese typo.
> 
> there is a compilation error on the generics branch which might or might
> not be valid (I don't have the language spec handy):
> 
> 3. ERROR in ../../classpath/java/util/Collections.java
>  (at line 6622)
>         (Class<Map.Entry<K,V>>) Map.Entry.class;
>         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> Cannot cast from Class<Map.Entry> to Class<Map.Entry<K,V>>
> 
> Cheers,
> 
> Mark
> 
> --- scripts/Ecj 19 Jun 2006 19:53:33 -0000      1.2
> +++ scripts/Ecj 21 Jun 2006 10:48:57 -0000
> @@ -88,7 +88,7 @@
>  cd org.eclipse.jdt.core
>  exec > ../ecj-native-build/Log.Std 2>&1
>  set -e
> -find compiler batch -name \*.java | CLASSPATH=compiler:batch xargs ../ecj-gcj-build/ecj -1.4 -bootclasspath $TOP/classpath/jikese-install/share/classpath/glibj.zip -classpath compiler:batch -d ../ecj-native-build -nowarn
> +find compiler batch -name \*.java | CLASSPATH=compiler:batch xargs ../ecj-gcj-build/ecj -1.4 -bootclasspath $TOP/classpath/jikes-install/share/classpath/glibj.zip -classpath compiler:batch -d ../ecj-native-build -nowarn
>  )
> 
>  Report "ecj built with native-ecj" $? ecj-native-build/Log.Std
> 
> 

My reading of the language spec. is that ecj is right (and
should have been earlier), but feel free to disagree.

A cast from one parameteric type to another, where both are fully
specified (i.e. no wildcards), is basically an equality test i.e. the
conversion from G(T_1, T_2 ... T_n) to G(S_1, S_2 ... S_n) holds if
S_1 = T_1 etc. where none of T_1..T_n or S_1..S_n are wildcards.

-- 
Andrew :-)

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