mirror of
https://github.com/Mercury-Language/mercury.git
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5194de7d96
compiler/prog_data.m:
Encode the above invariant in the type of functional dependencies.
compiler/hlds_class.m:
Document the same invariant in the HLDS representation of fundeps.
compiler/parse_class.m:
Enforce the invariant when parsing fundeps.
compiler/parse_util.m:
Add a new version of existing predicate for use by new code in
parse_class.m.
compiler/add_class.m:
compiler/intermod.m:
compiler/parse_tree_out_item.m:
Conform to the changes above.
606 lines
27 KiB
Mathematica
606 lines
27 KiB
Mathematica
%---------------------------------------------------------------------------%
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% vim: ft=mercury ts=4 sw=4 et
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%---------------------------------------------------------------------------%
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% Copyright (C) 1993-2012 The University of Melbourne.
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% Copyright (C) 2014-2025 The Mercury team.
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% This file may only be copied under the terms of the GNU General
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% Public License - see the file COPYING in the Mercury distribution.
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%---------------------------------------------------------------------------%
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:- module hlds.make_hlds.add_class.
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:- interface.
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:- import_module hlds.hlds_module.
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:- import_module hlds.make_hlds.make_hlds_types.
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:- import_module parse_tree.
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:- import_module parse_tree.error_spec.
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:- import_module parse_tree.prog_item.
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:- import_module list.
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%---------------------------------------------------------------------------%
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:- pred add_typeclass_defns(sec_list(item_typeclass_info)::in,
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module_info::in, module_info::out,
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list(error_spec)::in, list(error_spec)::out) is det.
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:- pred add_instance_defns(ims_list(item_instance_info)::in,
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module_info::in, module_info::out,
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list(error_spec)::in, list(error_spec)::out) is det.
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%---------------------------------------------------------------------------%
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%---------------------------------------------------------------------------%
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:- implementation.
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:- import_module check_hlds. % XXX Temporary import.
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:- import_module check_hlds.check_typeclass. % XXX Temporary import.
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:- import_module hlds.default_func_mode.
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:- import_module hlds.hlds_class.
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:- import_module hlds.hlds_pred.
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:- import_module hlds.make_hlds.add_pred.
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:- import_module hlds.make_hlds.state_var.
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:- import_module hlds.make_hlds_error.
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:- import_module hlds.status.
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:- import_module mdbcomp.
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:- import_module mdbcomp.prim_data.
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:- import_module mdbcomp.sym_name.
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:- import_module parse_tree.prog_data.
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:- import_module parse_tree.prog_type.
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:- import_module parse_tree.prog_util.
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:- import_module cord.
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:- import_module int.
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:- import_module map.
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:- import_module maybe.
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:- import_module one_or_more.
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:- import_module pair.
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:- import_module require.
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:- import_module set.
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:- import_module term.
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:- import_module varset.
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%---------------------------------------------------------------------------%
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add_typeclass_defns([], !ModuleInfo, !Specs).
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add_typeclass_defns([SecSubList | SecSubLists], !ModuleInfo, !Specs) :-
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SecSubList = sec_sub_list(SectionInfo, Items),
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SectionInfo = sec_info(ItemMercuryStatus, NeedQual),
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item_mercury_status_to_typeclass_status(ItemMercuryStatus,
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TypeClassStatus0),
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list.foldl2(
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add_typeclass_defn(ItemMercuryStatus, TypeClassStatus0, NeedQual),
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Items, !ModuleInfo, !Specs),
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add_typeclass_defns(SecSubLists, !ModuleInfo, !Specs).
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add_instance_defns([], !ModuleInfo, !Specs).
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add_instance_defns([ImsSubList | ImsSubLists], !ModuleInfo, !Specs) :-
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ImsSubList = ims_sub_list(ItemMercuryStatus, Items),
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item_mercury_status_to_instance_status(ItemMercuryStatus, InstanceStatus),
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list.foldl2(add_instance_defn(InstanceStatus), Items,
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!ModuleInfo, !Specs),
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add_instance_defns(ImsSubLists, !ModuleInfo, !Specs).
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%---------------------------------------------------------------------------%
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:- pred add_typeclass_defn(item_mercury_status::in,
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typeclass_status::in, need_qualifier::in, item_typeclass_info::in,
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module_info::in, module_info::out,
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list(error_spec)::in, list(error_spec)::out) is det.
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add_typeclass_defn(ItemMercuryStatus, TypeClassStatus0, NeedQual,
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ItemTypeClassInfo, !ModuleInfo, !Specs) :-
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ItemTypeClassInfo = item_typeclass_info(ClassName, ClassParamTVars,
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Constraints, FunDeps, Interface, VarSet, Context, _SeqNum),
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module_info_get_class_table(!.ModuleInfo, ClassTable0),
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list.length(ClassParamTVars, ClassArity),
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ClassId = class_id(ClassName, ClassArity),
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(
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Interface = class_interface_abstract,
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typeclass_make_status_abstract(TypeClassStatus0, TypeClassStatus1)
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;
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Interface = class_interface_concrete(_),
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TypeClassStatus1 = TypeClassStatus0
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),
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HLDSFunDeps = list.map(make_hlds_fundep(ClassParamTVars), FunDeps),
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( if map.search(ClassTable0, ClassId, OldDefn) then
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OldDefn = hlds_class_defn(OldTypeClassStatus, OldVarSet, _OldKinds,
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OldClassParamTVars, OldConstraints, OldFunDeps, _OldAncestors,
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OldInterface, OldClassMethodPredProcIds0, OldContext,
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_BadClassDefn0),
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% The typeclass is exported if *any* occurrence is exported,
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% even a previous abstract occurrence.
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typeclass_combine_status(TypeClassStatus1, OldTypeClassStatus,
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TypeClassStatus),
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(
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OldInterface = class_interface_concrete(_),
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OldClassMethodPredProcIds = OldClassMethodPredProcIds0,
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ClassInterface = OldInterface
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;
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OldInterface = class_interface_abstract,
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OldClassMethodPredProcIds = [],
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ClassInterface = Interface
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),
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% Check that the superclass constraints are identical.
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( if
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constraints_are_identical(OldClassParamTVars, OldVarSet,
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OldConstraints, ClassParamTVars, VarSet, Constraints)
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then
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SuperClassMismatchPieces = []
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else
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SuperClassMismatchPieces =
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[words("The superclass constraints do not match."), nl]
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),
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% Check that the functional dependencies are identical.
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( if class_fundeps_are_identical(OldFunDeps, HLDSFunDeps) then
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FunDepsMismatchPieces = []
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else
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FunDepsMismatchPieces =
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[words("The functional dependencies do not match."), nl]
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),
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MismatchPieces = SuperClassMismatchPieces ++ FunDepsMismatchPieces,
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(
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MismatchPieces = [],
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( if
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Interface = class_interface_concrete(_),
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OldInterface = class_interface_concrete(_)
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then
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TypeClassStatus = typeclass_status(OldImportStatus),
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% This is a duplicate, but an identical duplicate.
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( if OldImportStatus = status_opt_imported then
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true
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else
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report_multiply_defined("typeclass", ClassName,
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user_arity(ClassArity), Context, OldContext,
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[], !Specs)
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),
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HasIncompatibility = yes(OldDefn)
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else
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HasIncompatibility = no
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)
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;
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MismatchPieces = [_ | _],
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% This is a duplicate typeclass declaration that specifies
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% different superclasses and/or functional dependencies than
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% the original. Always report such errors, even in `.opt' files.
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UserArity = user_arity(ClassArity),
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report_multiply_defined("typeclass", ClassName, UserArity,
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Context, OldContext, MismatchPieces, !Specs),
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HasIncompatibility = yes(OldDefn)
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)
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else
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HasIncompatibility = no,
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OldClassMethodPredProcIds = [],
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ClassInterface = Interface,
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TypeClassStatus = TypeClassStatus1,
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% When we find the class declaration, initialize the list of its
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% instances, so that code processing the instances can just do
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% map.lookups in the instance table once a search in the class table
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% for the class_id has succeeded.
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module_info_get_instance_table(!.ModuleInfo, Instances0),
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map.det_insert(ClassId, [], Instances0, Instances),
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module_info_set_instance_table(Instances, !ModuleInfo)
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),
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(
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HasIncompatibility = yes(BaseDefn),
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(
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Interface = class_interface_abstract
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;
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Interface = class_interface_concrete(_),
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% Record the presence of a bad concrete definition,
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% so check_typeclass.m can avoid generating a misleading
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% error message about the class having no definition.
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BadDefn = BaseDefn ^ classdefn_maybe_bad := has_bad_class_defn,
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map.det_update(ClassId, BadDefn, ClassTable0, ClassTable),
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module_info_set_class_table(ClassTable, !ModuleInfo)
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)
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;
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HasIncompatibility = no,
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(
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Interface = class_interface_concrete(ClassDecls),
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module_declare_class_method_preds(ClassName, ClassParamTVars,
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TypeClassStatus, ItemMercuryStatus, NeedQual,
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ClassDecls, ClassMethodPredProcIds, !ModuleInfo, !Specs)
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;
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Interface = class_interface_abstract,
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ClassMethodPredProcIds = OldClassMethodPredProcIds
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),
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% The ancestors field is not set until the check_typeclass phase.
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Ancestors = [],
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% XXX kind inference:
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% We set all the kinds to `star' at the moment. This should be
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% done differently when we have a proper kind system.
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Kinds = map.init,
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ClassDefn = hlds_class_defn(TypeClassStatus, VarSet, Kinds,
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ClassParamTVars, Constraints, HLDSFunDeps, Ancestors,
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ClassInterface, ClassMethodPredProcIds, Context,
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has_no_bad_class_defn),
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map.set(ClassId, ClassDefn, ClassTable0, ClassTable),
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module_info_set_class_table(ClassTable, !ModuleInfo)
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).
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:- func make_hlds_fundep(list(tvar), prog_fundep) = hlds_class_fundep.
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make_hlds_fundep(TVars, ProgFunDep) = HLDSFunDep :-
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ProgFunDep = prog_fundep(ProgDomain, ProgRange),
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convert_vars_to_arg_posns(TVars, ProgDomain, HLDSDomain),
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convert_vars_to_arg_posns(TVars, ProgRange, HLDSRange),
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HLDSFunDep = fundep(HLDSDomain, HLDSRange).
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:- pred convert_vars_to_arg_posns(list(tvar)::in, one_or_more(tvar)::in,
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set(hlds_class_argpos)::out) is det.
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convert_vars_to_arg_posns(ProgTVars, OoMHLDSTVars, ArgPosnsSet) :-
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HLDSTVars = one_or_more_to_list(OoMHLDSTVars),
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ArgPosns =
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list.map(list.det_index1_of_first_occurrence(ProgTVars), HLDSTVars),
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set.list_to_set(ArgPosns, ArgPosnsSet).
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:- pred class_fundeps_are_identical(list(hlds_class_fundep)::in,
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list(hlds_class_fundep)::in) is semidet.
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class_fundeps_are_identical(OldFunDeps, FunDeps) :-
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% Allow for the functional dependencies to be in a different order.
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sort_and_remove_dups(OldFunDeps, SortedOldFunDeps),
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sort_and_remove_dups(FunDeps, SortedFunDeps),
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% The list elements we are comparing are sets; we rely on the fact that
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% sets have a canonical representation.
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SortedOldFunDeps = SortedFunDeps.
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% Add the item_pred_decl_infos and item_mode_decl_infos in the given
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% list of class_decls to the ModuleInfo, and record their identities
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% in the list of MethodInfos. The methods in MethodInfos will be in
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% the same order as the corresponding item_pred_decl_infos in ClassDecls.
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%
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:- pred module_declare_class_method_preds(sym_name::in, list(tvar)::in,
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typeclass_status::in, item_mercury_status::in,
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need_qualifier::in, list(class_decl)::in, list(method_info)::out,
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module_info::in, module_info::out,
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list(error_spec)::in, list(error_spec)::out) is det.
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module_declare_class_method_preds(ClassName, ClassParamVars, TypeClassStatus,
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ItemMercuryStatus, NeedQual, ClassDecls, MethodInfos,
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!ModuleInfo, !Specs) :-
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% We process ClassDecls in three stages.
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%
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% - In the first stage, classify_class_decls classifies each class_decl
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% as either a pred/func declaration or as a mode declaration. It returns
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% the pred/func declarations in order, and puts the mode declarations
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% into a per-pred/func map (ClassModeInfoMap).
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%
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% - In the second stage, add_class_pred_or_func_decl adds to the HLDS,
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% for each class method, both the item_pred_decl_info of the method,
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% and any item_mode_decl_infos for it. It also adds the default mode
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% declarations for functions that have no explicit mode declaration,
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% and generates an error message for predicates that have no explicit
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% mode declaration. It deletes from ClassModeInfoMap all the mode
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% declarations that it has added to the HLDS.
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%
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% - In the third stage, we call report_mode_decls_for_undeclared_method
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% on all the mode declarations left over from ClassModeInfoMap,
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% since these represent mode declarations for nonexistent class methods.
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%
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% If ClassDecls declares N predicates and/or functions, then the
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% MethodInfos list we return will contain N contiguous subsequences,
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% each corresponding to one of these predicates or functions.
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% The order of these subsequences will match the order of the
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% predicate and/or function declarations in ClassDecls.
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%
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% Each subsequence will consist of one method_info for each mode
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% declaration in for its method predicate or function ClassDecls,
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% and the order of these method_infos will match the order of those
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% mode declarations in ClassDecls.
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% Stage 1.
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classify_class_decls(ClassDecls, cord.init, ClassPredOrFuncInfosCord,
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map.init, ClassModeInfoMap),
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ClassPredOrFuncInfos = cord.list(ClassPredOrFuncInfosCord),
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% XXX STATUS
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TypeClassStatus = typeclass_status(OldImportStatus),
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PredStatus = pred_status(OldImportStatus),
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% Stage 2.
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list.foldl5(
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add_class_pred_or_func_and_mode_decls(ClassName, ClassParamVars,
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ItemMercuryStatus, PredStatus, NeedQual),
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ClassPredOrFuncInfos, 1, _, cord.init, MethodInfosCord,
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ClassModeInfoMap, UnhandledClassModeInfoMap, !ModuleInfo, !Specs),
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MethodInfos = cord.list(MethodInfosCord),
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% Stage 3.
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map.foldl(report_mode_decls_for_undeclared_method,
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UnhandledClassModeInfoMap, !Specs).
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:- pred classify_class_decls(list(class_decl)::in,
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cord(class_pred_or_func_info)::in,
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cord(class_pred_or_func_info)::out,
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map(pred_pf_name_arity, cord(class_mode_info))::in,
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map(pred_pf_name_arity, cord(class_mode_info))::out) is det.
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classify_class_decls([], !PredOrFuncInfos, !ModeDeclMap).
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classify_class_decls([Decl | Decls], !PredOrFuncInfos, !ModeDeclMap) :-
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(
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Decl = class_decl_pred_or_func(PredOrFuncInfo),
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cord.snoc(PredOrFuncInfo, !PredOrFuncInfos)
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;
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Decl = class_decl_mode(ModeInfo),
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ModeInfo = class_mode_info(PredSymName, MaybePredOrFunc, Modes,
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_WithInst, _MaybeDetism, _InstVarSet, _Context),
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(
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MaybePredOrFunc = no,
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% The only way this could have happened now is if a `with_inst`
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% annotation was not expanded.
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unexpected($pred, "unexpanded `with_inst` annotation")
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;
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MaybePredOrFunc = yes(PredOrFunc)
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),
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PredFormArity = arg_list_arity(Modes),
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user_arity_pred_form_arity(PredOrFunc, UserArity, PredFormArity),
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MethodPredName =
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pred_pf_name_arity(PredOrFunc, PredSymName, UserArity),
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( if map.search(!.ModeDeclMap, MethodPredName, ProcIdCord0) then
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cord.snoc(ModeInfo, ProcIdCord0, ProcIdCord),
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map.det_update(MethodPredName, ProcIdCord, !ModeDeclMap)
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else
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map.det_insert(MethodPredName, cord.singleton(ModeInfo),
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!ModeDeclMap)
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)
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),
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classify_class_decls(Decls, !PredOrFuncInfos, !ModeDeclMap).
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:- pred add_class_pred_or_func_and_mode_decls(sym_name::in, list(tvar)::in,
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item_mercury_status::in, pred_status::in, need_qualifier::in,
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class_pred_or_func_info::in, int::in, int::out,
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cord(method_info)::in, cord(method_info)::out,
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map(pred_pf_name_arity, cord(class_mode_info))::in,
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map(pred_pf_name_arity, cord(class_mode_info))::out,
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module_info::in, module_info::out,
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list(error_spec)::in, list(error_spec)::out) is det.
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add_class_pred_or_func_and_mode_decls(ClassName, ClassParamVars,
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ItemMercuryStatus, PredStatus, NeedQual, PredOrFuncInfo,
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!MethodProcNum, !MethodInfosCord, !ModeDeclMap, !ModuleInfo, !Specs) :-
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PredOrFuncInfo = class_pred_or_func_info(PredSymName, PredOrFunc,
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ArgTypesAndMaybeModes, WithType, WithInst, MaybeDetism,
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TypeVarSet, InstVarSet, ExistQVars, Purity, Constraints0, Context),
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% XXX kind inference:
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% We set the kinds to `star' at the moment. This will be different
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% when we have a kind system.
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var_list_to_type_list(map.init, ClassParamVars, ClassParamTypes),
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ImplicitConstraint = constraint(ClassName, ClassParamTypes),
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Constraints0 = univ_exist_constraints(UnivConstraints0, ExistConstraints),
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UnivConstraints = [ImplicitConstraint | UnivConstraints0],
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Constraints = univ_exist_constraints(UnivConstraints, ExistConstraints),
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ClassId = class_id(ClassName, list.length(ClassParamTypes)),
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PredFormArity = types_and_maybe_modes_arity(ArgTypesAndMaybeModes),
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user_arity_pred_form_arity(PredOrFunc, UserArity, PredFormArity),
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MethodPredName = pred_pf_name_arity(PredOrFunc, PredSymName, UserArity),
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Origin = compiler_origin_class_method(ClassId, MethodPredName),
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Attrs = item_compiler_attributes(Origin),
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MaybeAttrs = item_origin_compiler(Attrs),
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SeqNum = item_no_seq_num,
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PredDecl = item_pred_decl_info(PredSymName, PredOrFunc,
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ArgTypesAndMaybeModes, WithType, WithInst, MaybeDetism, MaybeAttrs,
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TypeVarSet, InstVarSet, ExistQVars, Purity, Constraints,
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Context, SeqNum),
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module_add_pred_decl(ItemMercuryStatus, PredStatus, NeedQual, PredDecl,
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MaybePredMaybeProcId, !ModuleInfo, !Specs),
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(
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MaybePredMaybeProcId = no
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% We could not add PredDecl to !ModuleInfo, but module_add_pred_decl
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% will have generated an error message to report the reason.
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;
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MaybePredMaybeProcId = yes(PredId - MaybeProcId),
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( if map.remove(MethodPredName, MethodModeDeclsCord, !ModeDeclMap) then
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MethodModeDecls = cord.list(MethodModeDeclsCord)
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else
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MethodModeDecls = []
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),
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(
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MaybeProcId = no,
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(
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MethodModeDecls = [],
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% If a method has no mode declaration, then
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% - if the method is a function: add the default mode.
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% - if the method is a predicate: report an error.
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module_info_pred_info(!.ModuleInfo, PredId, PredInfo0),
|
|
(
|
|
PredOrFunc = pf_function,
|
|
maybe_add_default_func_mode(!.ModuleInfo,
|
|
PredInfo0, PredInfo, MaybeFuncProcId),
|
|
(
|
|
MaybeFuncProcId = no,
|
|
% PredInfo0 was created fresh just above,
|
|
% without any modes defined.
|
|
unexpected($pred,
|
|
"maybe_add_default_func_mode did not add proc")
|
|
;
|
|
MaybeFuncProcId = yes(FuncProcId),
|
|
module_info_set_pred_info(PredId, PredInfo,
|
|
!ModuleInfo),
|
|
PredProcId = proc(PredId, FuncProcId),
|
|
MethodInfo = method_info(
|
|
method_proc_num(!.MethodProcNum), MethodPredName,
|
|
PredProcId, PredProcId),
|
|
!:MethodProcNum = !.MethodProcNum + 1,
|
|
cord.snoc(MethodInfo, !MethodInfosCord)
|
|
)
|
|
;
|
|
PredOrFunc = pf_predicate,
|
|
pred_method_with_no_modes_error(PredInfo0, !Specs)
|
|
)
|
|
;
|
|
MethodModeDecls = [_ | _],
|
|
list.foldl4(
|
|
add_class_mode_decl(ItemMercuryStatus, PredStatus,
|
|
MethodPredName, PredId),
|
|
MethodModeDecls,
|
|
!MethodProcNum, !MethodInfosCord, !ModuleInfo, !Specs)
|
|
)
|
|
;
|
|
MaybeProcId = yes(ProcId),
|
|
% The mode declaration has already been added to the pred_info
|
|
% of the class method in !.ModuleInfo.
|
|
PredProcId = proc(PredId, ProcId),
|
|
MethodInfo = method_info(
|
|
method_proc_num(!.MethodProcNum), MethodPredName,
|
|
PredProcId, PredProcId),
|
|
!:MethodProcNum = !.MethodProcNum + 1,
|
|
cord.snoc(MethodInfo, !MethodInfosCord),
|
|
(
|
|
MethodModeDecls = []
|
|
% The mode is part of the pred_info in !.ModuleInfo, and
|
|
% we added its method_info to !:MethodInfosCord above.
|
|
;
|
|
MethodModeDecls = [_ | _],
|
|
% Every mode in MethodModeDecls is disallowed by the
|
|
% predmode declaration embedded in PredDecl. We keep
|
|
% the predmode declaration, and discard MethodModeDecls
|
|
% after reporting them.
|
|
ReportBadModeDecl =
|
|
( func(MMD) = Spec :-
|
|
MMD = class_mode_info(_, _, _, _, _, _, MMDContext),
|
|
Spec = report_mode_decl_after_predmode(MethodPredName,
|
|
MMDContext)
|
|
),
|
|
BadModeDeclSpecs =
|
|
list.map(ReportBadModeDecl, MethodModeDecls),
|
|
!:Specs = BadModeDeclSpecs ++ !.Specs
|
|
)
|
|
)
|
|
).
|
|
|
|
:- pred add_class_mode_decl(item_mercury_status::in, pred_status::in,
|
|
pred_pf_name_arity::in, pred_id::in, class_mode_info::in,
|
|
int::in, int::out, cord(method_info)::in, cord(method_info)::out,
|
|
module_info::in, module_info::out,
|
|
list(error_spec)::in, list(error_spec)::out) is det.
|
|
|
|
add_class_mode_decl(ItemMercuryStatus, PredStatus, MethodPredName, PredId,
|
|
ModeInfo, !MethodProcNum, !MethodInfosCord, !ModuleInfo, !Specs) :-
|
|
MethodPredName = pred_pf_name_arity(PredOrFunc, PredSymName, _UserArity),
|
|
ModeInfo = class_mode_info(_PredSymName, _MaybePredOrFunc, Modes,
|
|
_WithInst, MaybeDetism, InstVarSet, Context),
|
|
WithInst = maybe.no,
|
|
SeqNum = item_no_seq_num,
|
|
ItemModeDecl = item_mode_decl_info(PredSymName, yes(PredOrFunc), Modes,
|
|
WithInst, MaybeDetism, InstVarSet, Context, SeqNum),
|
|
module_add_mode_decl(not_part_of_predmode, is_a_class_method,
|
|
ItemMercuryStatus, PredStatus, ItemModeDecl, PredProcId,
|
|
!ModuleInfo, !Specs),
|
|
PredProcId = proc(PredPredId, _ProcId),
|
|
expect(unify(PredId, PredPredId), $pred, "pred_id mismatch"),
|
|
MethodInfo = method_info(method_proc_num(!.MethodProcNum),
|
|
MethodPredName, PredProcId, PredProcId),
|
|
!:MethodProcNum = !.MethodProcNum + 1,
|
|
cord.snoc(MethodInfo, !MethodInfosCord).
|
|
|
|
%---------------------------------------------------------------------------%
|
|
|
|
:- pred add_instance_defn(instance_status::in, item_instance_info::in,
|
|
module_info::in, module_info::out,
|
|
list(error_spec)::in, list(error_spec)::out) is det.
|
|
|
|
add_instance_defn(InstanceStatus0, ItemInstanceInfo, !ModuleInfo, !Specs) :-
|
|
ItemInstanceInfo = item_instance_info(ClassName, Types, OriginalTypes,
|
|
Constraints, InstanceBody0, TVarSet, InstanceModuleName,
|
|
Context, _SeqNum),
|
|
(
|
|
InstanceBody0 = instance_body_abstract,
|
|
InstanceBody = instance_body_abstract,
|
|
% XXX This can make the status abstract_imported even if the instance
|
|
% is NOT imported.
|
|
% When this is fixed, please undo the workaround for this bug
|
|
% in instance_used_modules in unused_imports.m.
|
|
instance_make_status_abstract(InstanceStatus0, InstanceStatus)
|
|
;
|
|
InstanceBody0 = instance_body_concrete(InstanceMethods0),
|
|
list.map(expand_bang_state_pairs_in_instance_method,
|
|
InstanceMethods0, InstanceMethods),
|
|
InstanceBody = instance_body_concrete(InstanceMethods),
|
|
InstanceStatus = InstanceStatus0
|
|
),
|
|
|
|
module_info_get_class_table(!.ModuleInfo, Classes),
|
|
module_info_get_instance_table(!.ModuleInfo, InstanceTable0),
|
|
list.length(Types, ClassArity),
|
|
ClassId = class_id(ClassName, ClassArity),
|
|
( if map.search(Classes, ClassId, _) then
|
|
% The MaybeSubsumedContext is set later, by check_typeclass.m.
|
|
MaybeSubsumedContext = maybe.no,
|
|
MaybeMethodInfos = maybe.no,
|
|
map.init(ProofMap),
|
|
NewInstanceDefn = hlds_instance_defn(InstanceModuleName,
|
|
InstanceStatus, TVarSet, OriginalTypes, Types,
|
|
Constraints, MaybeSubsumedContext, ProofMap,
|
|
InstanceBody, MaybeMethodInfos, Context),
|
|
map.lookup(InstanceTable0, ClassId, OldInstanceDefns),
|
|
map.det_update(ClassId, [NewInstanceDefn | OldInstanceDefns],
|
|
InstanceTable0, InstanceTable),
|
|
module_info_set_instance_table(InstanceTable, !ModuleInfo)
|
|
else
|
|
report_instance_for_undefined_typeclass(ClassId, Context, !Specs)
|
|
).
|
|
|
|
%---------------------------------------------------------------------------%
|
|
|
|
:- pred pred_method_with_no_modes_error(pred_info::in,
|
|
list(error_spec)::in, list(error_spec)::out) is det.
|
|
|
|
pred_method_with_no_modes_error(PredInfo, !Specs) :-
|
|
PorF = pred_info_is_pred_or_func(PredInfo),
|
|
Name = pred_info_name(PredInfo),
|
|
user_arity(UserArityInt) = pred_info_user_arity(PredInfo),
|
|
NameArity = name_arity(Name, UserArityInt),
|
|
pred_info_get_context(PredInfo, Context),
|
|
Pieces = [words("Error:")] ++
|
|
color_as_incorrect([words("no mode declaration")]) ++
|
|
[words("for method"), p_or_f(PorF)] ++
|
|
color_as_subject([name_arity(NameArity), suffix(".")]) ++ [nl],
|
|
Spec = spec($pred, severity_error, phase_pt2h, Context, Pieces),
|
|
!:Specs = [Spec | !.Specs].
|
|
|
|
:- pred report_instance_for_undefined_typeclass(class_id::in, prog_context::in,
|
|
list(error_spec)::in, list(error_spec)::out) is det.
|
|
|
|
report_instance_for_undefined_typeclass(ClassId, Context, !Specs) :-
|
|
Pieces = [words("Error:"),
|
|
decl("instance"), words("declaration"), words("for")] ++
|
|
color_as_subject([qual_class_id(ClassId)]) ++
|
|
color_as_incorrect([words("without"), words("corresponding"),
|
|
decl("typeclass"), words("declaration.")]) ++ [nl],
|
|
Spec = spec($pred, severity_error, phase_pt2h, Context, Pieces),
|
|
!:Specs = [Spec | !.Specs].
|
|
|
|
:- pred report_mode_decls_for_undeclared_method(pred_pf_name_arity::in,
|
|
cord(class_mode_info)::in,
|
|
list(error_spec)::in, list(error_spec)::out) is det.
|
|
|
|
report_mode_decls_for_undeclared_method(MethodPredName, ModeInfosCord,
|
|
!Specs) :-
|
|
ModeInfos = cord.list(ModeInfosCord),
|
|
list.foldl(report_mode_decl_for_undeclared_method(MethodPredName),
|
|
ModeInfos, !Specs).
|
|
|
|
:- pred report_mode_decl_for_undeclared_method(pred_pf_name_arity::in,
|
|
class_mode_info::in,
|
|
list(error_spec)::in, list(error_spec)::out) is det.
|
|
|
|
report_mode_decl_for_undeclared_method(MethodPredName, ModeInfo, !Specs) :-
|
|
MethodPredName = pred_pf_name_arity(PorF, SymName, UserArity),
|
|
UserArity = user_arity(UserArityInt),
|
|
NameArity = name_arity(unqualify_name(SymName), UserArityInt),
|
|
ModeInfo = class_mode_info(_, _, _, _, _, _, Context),
|
|
Pieces = [words("Error: mode declaration for type class method"),
|
|
p_or_f(PorF)] ++ color_as_subject([name_arity(NameArity)]) ++
|
|
color_as_incorrect([words("without")]) ++
|
|
[words("a corresponding"), p_or_f(PorF), words("declaration."), nl],
|
|
Spec = spec($pred, severity_error, phase_pt2h, Context, Pieces),
|
|
!:Specs = [Spec | !.Specs].
|
|
|
|
%---------------------------------------------------------------------------%
|
|
:- end_module hlds.make_hlds.add_class.
|
|
%---------------------------------------------------------------------------%
|