Branches: main
Estimated hours taken: 0.5
With this change, the files in the `java' directory now all compile
fine with `javac' (after `mkdir mercury; ln -s .. mercury/runtime')
except for the reference to `mercury.Builtin.builtin_comparison_result_0'
in Compare.java.
java/Sectag_Locn.java:
Fix typos.
Estimated hours taken: 90
Branches: main
Changes and additions to the Java back-end so that:
o While tags shouldn't be generated, they do get generated in some cases
and are now handled correctly.
o The Java back-end now generates class constructors.
o The Java back-end is now able to simulate the behaviour of function
pointers, which are used for closures, continuations, as well as unify
and compare.
mercury/compiler/mlds_to_java.m:
Extensive changes to existing code to implement tags and class
constructors. Also, addition of code to search MLDS for uses of
function pointers and to generate MLDS for wrapper classes. As well
as many small bug fixes.
Removed some (unfinished) code for dealing with Unify and Compare, this
code was redundant now that function pointers have been implemented.
mercury/compiler/java_util.m:
Updated to return noops for most tag operators.
mercury/java/MethodPtr.java:
New file. This is the interface which the wrapper classes used for
function pointers extend.
Estimated hours taken: 10.
Classes used by the Java backend, particularly in the implementation
of RTTI.
java/Compare.java:
java/Unify.java:
New files. Java classes for implementation of wrapper classes
around the builtin `unify'and `compare' predicates.
java/JavaInternal.java:
New file. Java class for storing runtime information such
as command line arguments.
java/DuExistInfo.java:
java/DuExistLocn.java:
java/DuFunctorDesc.java:
java/DuPtagLayout.java:
java/EnumFunctorDesc.java:
java/NotagFunctorDesc.java:
java/ProcAddr.java:
java/PseudoTypeInfo.java:
java/Sectag_Locn.java:
java/TypeCtorInfo_Struct.java
java/TypeCtorRep.java:
java/TypeFunctors.java:
java/TypeLayout.java:
New files. Java classes for implementing Mercury RTTI.
java/UnreachableDefault.java:
New file. Runtime exception that signals that unreachable
default case in a switch statement has been reached.
runtime/mercury_type_info.h:
Update comments to mention that Java runtime classes will
need to be altered if structures in this file are.
