mirror of
https://github.com/Mercury-Language/mercury.git
synced 2026-04-15 17:33:38 +00:00
482105e074
Estimated hours taken: 10
Branches: main
Allow user-defined comparison functions using the syntax
:- type t ---> t where equality is t_equal, comparison is t_compare.
.
Allow user-defined equality and comparison for foreign types using the syntax
:- pragma foreign_type(c, t, "c_t") where
equality is t_equal, comparison is t_compare.
compiler/prog_data.m:
compiler/mercury_to_mercury.m:
compiler/hlds_out.m:
compiler/*.m:
Allow comparison predicates in `type' and `pragma foreign_type'
declarations
compiler/hlds_data.m:
compiler/*.m:
Allow equality and comparison predicates to be attached
to foreign types.
compiler/prog_io.m:
compiler/prog_io_pragma.m:
Parse the new syntax.
compiler/make_hlds.m:
Don't add the types to the HLDS or do typechecking if
there are errors in the type declarations.
Test case: tests/invalid/foreign_type_visibility.m.
compiler/foreign.m:
compiler/special_pred.m:
compiler/type_util.m:
Check whether foreign types have user-defined equality.
compiler/unify_proc.m:
Generate clauses for user-defined comparison,
and clauses for unification for foreign types.
compiler/intermod.m:
Resolve overloading before writing the `.opt' files.
library/builtin.m:
Add `uo' modes for promise_only_solution, for use in
user-defined comparison predicates.
Add types and insts to allow declaration of user-defined
comparison predicates using `with_type` and `with_inst`.
We already have types and insts `builtin__comparison_pred',
but they have a different argument ordering to `compare/3'.
NEWS:
doc/reference_manual.texi:
Document the change.
tests/hard_coded/Mmakefile:
tests/hard_coded/user_compare.{m,exp}:
Test case.
tests/invalid/Mmakefile:
tests/invalid/typeclass_test_{9,10}.{m,err_exp}:
tests/invalid/purity/purity_nonsense{,2}.{m,err_exp}:
The change to error-checking in make_hlds.m meant that
the compilation stopped before some errors in
typeclass_test_9.m were detected. The code which
tests for those errors is now in typeclass_test_10.m.
6 lines
38 B
Plaintext
6 lines
38 B
Plaintext
'>'
|
|
succeeded
|
|
succeeded
|
|
succeeded
|
|
'<'
|