Porting to Java using Garden Point Compiler.

From: Campbell, Robert D (UK Edinburgh) <"Campbell,>
Date: Tue, 02 Nov 2004 08:58:37 +0000

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We have tried a few simple experiments, and
had some problems.

Obviously (?) the first thing we did was
to delete references to IMPORTed stuff. This
still left something worth reusing in a
particular Java programme we were working on.

The next problem was that the compiler refused
to compile 'uninitialised' pointers (the Language
Report, section 10, says they are initialised to NIL).
Easy, if rather tedious, to fix.

The secret to accessing top level 'static' procedures
in Java seems to be to regard then as methods of a
class corresponding to the CP MODULE.

The secret to accessing type-bound procedures
in Java seems to be to regard then as methods of a
class corresponding to the CP RECORD TYPE.

But, and this is where some help would be appreciated,
we don't know how to declare variables in Java that
correpond to CP types such as

TYPE
  Vector* = POINTER TO ARRAY OF INTEGER;

We also had problems with the type

  MonadicFn* = PROCEDURE (x : INTEGER) : INTEGER;


Have other people been successful in using GPC to link
non-trivial CP modules into Java?

Cheers

Robert

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Received on Tue Nov 02 2004 - 09:58:37 UTC