Estimated hours taken: 18
Branches: main
Some fixes to the Java back-end to make it support RTTI
better. The aim is to at least be able to *compile* code
that makes use of polymorphism (e.g. the Mercury standard
library!), although that aim is not yet achieved with this diff.
Getting code which actually *uses* the RTTI to work is still
a long way off...
compiler/rtti.m:
compiler/mlds_to_java.m:
Fix some bugs in the code to output RTTI type names.
compiler/mlds_to_java.m:
Output the RTTI definitions. This is needed to avoid errors
in code which references them.
Handle initializers better; in particular deal with nested
initializers properly.
Pass the current module name down to output_lval, so that we can
module-qualify data names only if they occur in a different
module. This is needed to ensure that static data defined
in other modules gets module-qualified, but local variables don't.
This also required change some places which were incorrectly
calling output_fully_qualified_name to instead call output_name.
Add comments in the generated output code when generating
"java.lang.Object", so that it is clearer what kind of object
is involved.
Add some special treatment for the types with hand-defined RTTI.
java/runtime/*.java:
Add some definitions of RTTI types, and some new constructors
for the RTTI types that were already defined.
These are currently all just stubs.
