Estimated hours taken: 5.5
Branches: main
Implement compare_representation/3, which is like compare except that it
is cc_multi, and it doesn't abort on non-canonical types. The implementation
only works for the LLDS backend; in other cases, the runtime aborts with
a "sorry" message. For this reason, it is not officially part of the
standard library yet.
library/std_util.m:
Add the new predicate, which is implemented via "external".
runtime/mercury_ho_call.c:
Implement compare_representation/3, and also a C version.
runtime/mercury_unify_compare_body.h:
Implement the body of compare_representation/3. When the macro
include_compare_rep_code is defined comparison of preds and
funcs doesn't abort, the code that is used for MR_COMPARE_BY_RTTI
is enabled, and usereq types are treated as normal types.
runtime/mercury_conf_param.h:
Document the fact that calls to compare_representation are
counted as calls to compare for the purposes of MR_TYPE_CTOR_STATS.
runtime/Mmakefile:
Bug fix: add missing pic_o versions of the explicit dependencies.
Use variables for the suffixes in these dependencies.
runtime/mercury.c:
runtime/mercury.h:
Supply a HIGHLEVEL_CODE version of the new predicate. This just
gives a "Sorry, not implemented" message and aborts.
tests/hard_coded/Mmakefile:
tests/hard_coded/compare_rep_usereq.exp:
tests/hard_coded/compare_rep_usereq.m:
tests/hard_coded/compare_representation.exp:
tests/hard_coded/compare_representation.m:
Test cases.
tests/hard_coded/compare_rep_array.m:
A test case which doesn't work yet.
