This is the first step towards implementing a subtypes feature.
It introduces type definitions of the form
:- type subtype =< supertype ---> body.
Later, terms of a subtype should share a data representation with their
supertype, and it will be possible to convert terms between two types
that share "base types" using a coerce operation.
doc/reference_manual.texi:
Add documentation for subtypes.
Add documentation for a proposed `coerce' operation, commented out
for now.
Add "=<" to the list of reserved type names.
compiler/hlds_data.m:
Add supertype field to hlds_du_type.
compiler/prog_data.m:
Add du_supertype field to type_details_du.
Add comment for future work.
compiler/parse_type_defn.m:
Parse subtype definitions.
Check that variables which occur in the "=< supertype" part
also occur on the left hand side of the subtype definition.
compiler/parse_type_name.m:
Add a new context for why_no_ho_inst_info.
Add "=<" to is_known_type_name, i.e. prevent the user from defining
a type of that name (any longer).
compiler/add_type.m:
Rename add_du_ctors_check_foreign_type_for_cur_backend to
add_du_ctors_check_subtype_check_foreign_type.
In add_du_ctors_check_subtype_check_foreign_type, check that
subtype definitions satisfy the conditions documented in the
reference manual.
compiler/make_hlds_passes.m:
Conform to previous renaming.
compiler/comp_unit_interface.m:
Follow supertypes when computing the required type constructors
whose definitions need to be kept in the implementation section
of a .int file.
compiler/equiv_type.m:
compiler/equiv_type_hlds.m:
Replace equivalence types in supertypes.
compiler/module_qual.qualify_items.m:
Perform module qualification in supertypes.
compiler/hlds_out_module.m:
Write out the "=< supertype" part of subtype definitions.
compiler/parse_tree_out.m:
Write out the "=< supertype" part of subtype definitions.
compiler/recompilation.usage.m:
Follow supertypes when finding used items.
compiler/add_foreign_enum.m:
compiler/add_special_pred.m:
compiler/check_parse_tree_type_defns.m:
compiler/check_typeclass.m:
compiler/code_info.m:
compiler/dead_proc_elim.m:
compiler/decide_type_repn.m:
compiler/det_report.m:
compiler/direct_arg_in_out.m:
compiler/du_type_layout.m:
compiler/foreign.m:
compiler/inst_check.m:
compiler/intermod.m:
compiler/ml_type_gen.m:
compiler/ml_unify_gen_test.m:
compiler/ml_unify_gen_util.m:
compiler/post_term_analysis.m:
compiler/prog_type.m:
compiler/recompilation.check.m:
compiler/resolve_unify_functor.m:
compiler/simplify_goal_ite.m:
compiler/switch_util.m:
compiler/table_gen.m:
compiler/term_norm.m:
compiler/type_ctor_info.m:
compiler/type_util.m:
compiler/unify_proc.m:
compiler/unused_imports.m:
compiler/xml_documentation.m:
Conform to HLDS changes.
Add comments for future work.
tests/invalid/Mmakefile:
tests/invalid/subtype_abstract.err_exp:
tests/invalid/subtype_abstract.m:
tests/invalid/subtype_circular.err_exp:
tests/invalid/subtype_circular.m:
tests/invalid/subtype_ctor_arg.err_exp:
tests/invalid/subtype_ctor_arg.m:
tests/invalid/subtype_eqv.err_exp:
tests/invalid/subtype_eqv.m:
tests/invalid/subtype_exist_constraints.err_exp:
tests/invalid/subtype_exist_constraints.m:
tests/invalid/subtype_exist_vars.err_exp:
tests/invalid/subtype_exist_vars.m:
tests/invalid/subtype_foreign.err_exp:
tests/invalid/subtype_foreign.m:
tests/invalid/subtype_foreign_supertype.err_exp:
tests/invalid/subtype_foreign_supertype.m:
tests/invalid/subtype_foreign_supertype2.err_exp:
tests/invalid/subtype_foreign_supertype2.err_exp2:
tests/invalid/subtype_foreign_supertype2.m:
tests/invalid/subtype_ho.err_exp:
tests/invalid/subtype_ho.m:
tests/invalid/subtype_invalid_supertype.err_exp:
tests/invalid/subtype_invalid_supertype.m:
tests/invalid/subtype_not_subset.err_exp:
tests/invalid/subtype_not_subset.m:
tests/invalid/subtype_syntax.err_exp:
tests/invalid/subtype_syntax.m:
tests/invalid_submodules/Mercury.options:
tests/invalid_submodules/Mmakefile:
tests/invalid_submodules/subtype_submodule.err_exp:
tests/invalid_submodules/subtype_submodule.m:
tests/valid/Mmakefile:
tests/valid/subtype_basic.m:
Add test cases.
This is to compile them with "mmake -j1", and thus avoid the intermittent
failures caused by interface files of nested submodules not being ready
when another job, executed in parallel by mmake, wants to read them.
tests/invalid_submodules/children.m:
tests/invalid_submodules/children2.m:
tests/invalid_submodules/duplicate_module.m:
tests/invalid_submodules/duplicate_module_test.err_exp:
tests/invalid_submodules/duplicate_module_test.m:
tests/invalid_submodules/exported_unify3.err_exp:
tests/invalid_submodules/exported_unify3.err_exp2:
tests/invalid_submodules/exported_unify3.m:
tests/invalid_submodules/func_class.err_exp:
tests/invalid_submodules/func_class.m:
tests/invalid_submodules/import_in_parent.err_exp:
tests/invalid_submodules/import_in_parent.m:
tests/invalid_submodules/missing_parent_import.err_exp:
tests/invalid_submodules/missing_parent_import.m:
tests/invalid_submodules/nested_impl_in_int.err_exp:
tests/invalid_submodules/nested_impl_in_int.m:
tests/invalid_submodules/sub_a.m:
tests/invalid_submodules/sub_c.err_exp:
tests/invalid_submodules/sub_c.m:
tests/invalid_submodules/undef_mod_qual.err_exp:
tests/invalid_submodules/undef_mod_qual.m:
tests/invalid_submodules/unresolved_overloading.err_exp:
tests/invalid_submodules/unresolved_overloading.m:
Move these files, which contain the source code and expected outputs
of the affected test cases, from the invalid directory to the new
invalid_submodules directory.
tests/invalid/Mercury.options:
tests/invalid/Mmakefile:
Delete any mentions of the moved test cases.
Improve sh programming style in actions.
tests/invalid_submodules/Mercury.options:
tests/invalid_submodules/Mmakefile:
List *only* the moved test cases. Specify the -j1 flag for mmake.
tests/Mmakefile:
tools/bootcheck:
Mention the new test directory.
Request that the list of test directories in these two places be kept
in sync.
Note that the feedback test directory is not yet ready.
