[m-rev.] diff: more modules for 4-space indentation

Zoltan Somogyi zs at cs.mu.OZ.AU
Sun Aug 14 15:45:35 AEST 2005


compiler/det_report.m:
compiler/hlds_out.m:
	Convert these modules to four-space indentation to reduce the number
	of bad line breaks. Fix some departures from our coding standards.

Zoltan.

cvs diff: Diffing .
cvs diff: Diffing analysis
cvs diff: Diffing bindist
cvs diff: Diffing boehm_gc
cvs diff: Diffing boehm_gc/Mac_files
cvs diff: Diffing boehm_gc/cord
cvs diff: Diffing boehm_gc/cord/private
cvs diff: Diffing boehm_gc/doc
cvs diff: Diffing boehm_gc/include
cvs diff: Diffing boehm_gc/include/private
cvs diff: Diffing boehm_gc/tests
cvs diff: Diffing browser
cvs diff: Diffing bytecode
cvs diff: Diffing compiler
Index: compiler/det_report.m
===================================================================
RCS file: /home/mercury/mercury1/repository/mercury/compiler/det_report.m,v
retrieving revision 1.101
diff -u -b -r1.101 det_report.m
--- compiler/det_report.m	14 Aug 2005 03:20:38 -0000	1.101
+++ compiler/det_report.m	14 Aug 2005 03:23:19 -0000
@@ -1,4 +1,6 @@
 %-----------------------------------------------------------------------------%
+% vim: ft=mercury ts=4 sw=4 et
+%-----------------------------------------------------------------------------%
 % Copyright (C) 1995-2005 The University of Melbourne.
 % This file may only be copied under the terms of the GNU General
 % Public License - see the file COPYING in the Mercury distribution.
@@ -24,9 +26,10 @@
 :- import_module list.
 :- import_module set.
 
-:- type det_msg	--->
-			% warnings
-			multidet_disj(prog_context, list(prog_context))
+:- type det_msg
+            % The followintg are warnings.
+
+    --->    multidet_disj(prog_context, list(prog_context))
 		;	det_disj(prog_context, list(prog_context))
 		;	semidet_disj(prog_context, list(prog_context))
 		;	zero_soln_disj(prog_context, list(prog_context))
@@ -38,26 +41,23 @@
 		;	goal_cannot_succeed(prog_context)
 		;	det_goal_has_no_outputs(prog_context)
 		;	warn_obsolete(pred_id, prog_context)
-				% warning about calls to predicates
-				% for which there is a `:- pragma obsolete'
-				% declaration.
+            % Warning about calls to predicates for which there is
+            % a `:- pragma obsolete' declaration.
 		;	warn_infinite_recursion(prog_context)
-				% warning about recursive calls
-				% which would cause infinite loops.
-		;	duplicate_call(seen_call_id, prog_context,
-				prog_context)
-				% multiple calls with the same input args.
-			% errors
+            % Warning about recursive calls which would cause infinite loops.
+    ;       duplicate_call(seen_call_id, prog_context, prog_context)
+            % Multiple calls with the same input args.
+
+            % The following are errors.
+
 		;	cc_unify_can_fail(hlds_goal_info, prog_var, type,
 				prog_varset, cc_unify_context)
 		;	cc_unify_in_wrong_context(hlds_goal_info, prog_var,
 				type, prog_varset, cc_unify_context)
 		;	cc_pred_in_wrong_context(hlds_goal_info, determinism,
 				pred_id, proc_id)
-		;	higher_order_cc_pred_in_wrong_context(hlds_goal_info,
-				determinism)
-		;	error_in_lambda(
-				determinism, determinism, % declared, inferred
+    ;       higher_order_cc_pred_in_wrong_context(hlds_goal_info, determinism)
+    ;       error_in_lambda(determinism, determinism, % declared, inferred
 				hlds_goal, hlds_goal_info, pred_id, proc_id)
 		;	par_conj_not_det(determinism, pred_id, proc_id,
 				hlds_goal_info, list(hlds_goal))
@@ -65,12 +65,12 @@
 		;	has_io_state_but_not_det(pred_id, proc_id)
 		;	will_not_throw_with_erroneous(pred_id, proc_id)
 		;	export_model_non_proc(pred_id, proc_id, determinism)
-				% Procedure with multi or nondet detism
-				% exported via :- pragma export ...
+            % Procedure with multi or nondet detism exported
+            % via :- pragma export ...
 		;	promise_equivalent_solutions_missing_vars(prog_context,
 				prog_varset, set(prog_var))
-		;	promise_equivalent_solutions_extra_vars(prog_context,
-				prog_varset, set(prog_var)).
+    ;       promise_equivalent_solutions_extra_vars(prog_context, prog_varset,
+                set(prog_var)).
 
 :- type seen_call_id
 	--->	seen_call(pred_id, proc_id)
@@ -84,47 +84,48 @@
 
 	% Check all the determinism declarations in this module.
 	% This is the main predicate exported by this module.
-
+    %
 :- pred global_checking_pass(pred_proc_list::in,
 	module_info::in, module_info::out, io::di, io::uo) is det.
 
 	% Check a lambda goal with the specified declared and inferred
 	% determinisms.
-
+    %
 :- pred det_check_lambda(determinism::in, determinism::in, hlds_goal::in,
 	hlds_goal_info::in, det_info::in, list(det_msg)::out) is det.
 
 	% Print some determinism warning and/or error messages,
 	% and update the module info accordingly.
-
+    %
 :- pred det_report_and_handle_msgs(list(det_msg)::in,
 	module_info::in, module_info::out, io::di, io::uo) is det.
 
 	% Print some determinism warning and/or error messages,
 	% and return the number of warnings and errors, so that code
 	% somewhere elsewhere can update the module info.
-
+    %
 :- pred det_report_msgs(list(det_msg)::in, module_info::in, int::out, int::out,
 	io::di, io::uo) is det.
 
-
 :- type msg_modes
-	--->	all_modes	% the warning should be reported only
-				% if it occurs in all modes of the predicate
-	;	any_mode.	% the warning should be reported
+    --->    all_modes   % The warning should be reported only
+                        % if it occurs in all modes of the predicate.
+
+    ;       any_mode.   % The warning should be reported
 				% if it occurs in any mode of the predicate
 
 	% Decide if the warning should be reported if it occurs in
 	% any mode of the predicate, not only if it occurs in all modes.
+    %
 :- pred det_msg_is_any_mode_msg(det_msg::in, msg_modes::out) is det.
 
 %-----------------------------------------------------------------------------%
 
 :- type options_to_restore.
 
-	% Call this predicate before rerunning determinism analysis
-	% after an optimization pass to disable all warnings. Errors will
-	% still be reported.
+    % Call this predicate before rerunning determinism analysis after an
+    % optimization pass to disable all warnings. Errors will still be reported.
+    %
 :- pred disable_det_warnings(options_to_restore::out, io::di, io::uo) is det.
 
 :- pred restore_det_warnings(options_to_restore::in, io::di, io::uo) is det.
@@ -175,17 +176,15 @@
 global_checking_pass([proc(PredId, ProcId) | Rest], !ModuleInfo, !IO) :-
 	module_info_pred_proc_info(!.ModuleInfo, PredId, ProcId,
 		PredInfo, ProcInfo),
-	check_determinism(PredId, ProcId, PredInfo, ProcInfo,
-		!ModuleInfo, !IO),
-	check_determinism_of_main(PredId, ProcId, PredInfo, ProcInfo,
-		!ModuleInfo, !IO),
-	check_for_multisoln_func(PredId, ProcId, PredInfo, ProcInfo,
-		!ModuleInfo, !IO),
+    check_determinism(PredId, ProcId, PredInfo, ProcInfo, !ModuleInfo, !IO),
+    check_determinism_of_main(PredId, ProcId, PredInfo, ProcInfo, !ModuleInfo,
+        !IO),
+    check_for_multisoln_func(PredId, ProcId, PredInfo, ProcInfo, !ModuleInfo,
+        !IO),
 	global_checking_pass(Rest, !ModuleInfo, !IO).
 
 :- pred check_determinism(pred_id::in, proc_id::in, pred_info::in,
-	proc_info::in, module_info::in, module_info::out,
-	io::di, io::uo) is det.
+    proc_info::in, module_info::in, module_info::out, io::di, io::uo) is det.
 
 check_determinism(PredId, ProcId, PredInfo0, ProcInfo0, !ModuleInfo, !IO) :-
 	proc_info_declared_determinism(ProcInfo0, MaybeDetism),
@@ -207,32 +206,25 @@
 			(
 				ShouldIssueWarning = yes,
 
-				% Don't report warnings for class method
-				% implementations -- the determinism in the
-				% `:- typeclass' declaration will be
-				% the loosest of all possible instances.
-				% This is similar to the reason we don't
-				% report warnings for lambda expressions.
-				\+ check_marker(Markers,
-					class_instance_method),
+                % Don't report warnings for class method implementations --
+                % the determinism in the `:- typeclass' declaration will be
+                % the loosest of all possible instances. This is similar to
+                % the reason we don't report warnings for lambda expressions.
+                \+ check_marker(Markers, class_instance_method),
 
-				% Don't report warnings for procedures with
-				% no clauses.
+                % Don't report warnings for procedures with no clauses.
 				\+ check_marker(Markers, stub),
 
-				% Don't report warnings for compiler-generated
-				% Unify, Compare or Index procedures, since the
-				% user has no way to shut these up. These can
-				% happen for the Unify pred for the unit type,
-				% if such types are not boxed (as they are not
+                % Don't report warnings for compiler-generated Unify, Compare
+                % or Index procedures, since the user has no way to shut
+                % these up. These can happen for the Unify pred for the unit
+                % type, if such types are not boxed (as they are not
 				% boxed for the IL backend).
 				\+ is_unify_or_compare_pred(PredInfo0),
 
-				% Don't warn about predicates which are
-				% inferred erroneous when the appropiate
-				% option is set.  This is to avoid
-				% warnings about unimplemented
-				% predicates.
+                % Don't warn about predicates which are inferred erroneous
+                % when the appropiate option is set. This is to avoid warnings
+                % about unimplemented predicates.
 				(
 					WarnAboutInferredErroneous = yes
 				;
@@ -240,41 +232,34 @@
 					InferredDetism \= erroneous
 				)
 			->
-				Message = "  warning: determinism " ++
-					"declaration could be tighter.\n",
-				report_determinism_problem(PredId, ProcId,
-					!.ModuleInfo, Message, DeclaredDetism,
-					InferredDetism, !IO)
+                Message = "warning: determinism declaration " ++
+                    "could be tighter.\n",
+                report_determinism_problem(PredId, ProcId, !.ModuleInfo,
+                    Message, DeclaredDetism, InferredDetism, !IO)
 			;
 				true
 			)
 		;
 			Cmp = tighter,
 			module_info_incr_errors(!ModuleInfo),
-			Message = "  error: determinism declaration " ++
-				"not satisfied.\n",
-			report_determinism_problem(PredId, ProcId,
-				!.ModuleInfo, Message, DeclaredDetism,
-				InferredDetism, !IO),
+            Message = "  error: determinism declaration not satisfied.\n",
+            report_determinism_problem(PredId, ProcId, !.ModuleInfo, Message,
+                DeclaredDetism, InferredDetism, !IO),
 			proc_info_goal(ProcInfo0, Goal),
 			proc_info_vartypes(ProcInfo0, VarTypes),
 			globals__io_get_globals(Globals, !IO),
-			det_info_init(!.ModuleInfo, VarTypes, PredId, ProcId,
-				Globals, DetInfo),
-			det_diagnose_goal(Goal, DeclaredDetism, [], DetInfo,
-				_, !IO)
-			% XXX with the right verbosity options, we want to
-			% call report_determinism_problem only if diagnose
-			% returns false, i.e. it didn't print a message.
+            det_info_init(!.ModuleInfo, VarTypes, PredId, ProcId, Globals,
+                DetInfo),
+            det_diagnose_goal(Goal, DeclaredDetism, [], DetInfo, _, !IO)
+            % XXX With the right verbosity options, we want to call
+            % report_determinism_problem only if diagnose returns false,
+            % i.e. it didn't print a message.
 		)
 	),
 
-	% make sure the code model is valid given the eval method
+    % Make sure the code model is valid given the eval method.
 	proc_info_eval_method(ProcInfo0, EvalMethod),
-	(
-		valid_determinism_for_eval_method(EvalMethod,
-			InferredDetism) = yes
-	->
+    ( valid_determinism_for_eval_method(EvalMethod, InferredDetism) = yes ->
 		proc_info_set_eval_method(EvalMethod, ProcInfo0, ProcInfo),
 		pred_info_procedures(PredInfo0, ProcTable0),
 		map__det_update(ProcTable0, ProcId, ProcInfo, ProcTable),
@@ -284,14 +269,11 @@
 		proc_info_context(ProcInfo0, Context),
 		write_error_pieces(Context, 0,
 			[words("Error: `pragma "
-				++ eval_method_to_one_string(EvalMethod)
-				++ "'"),
+                ++ eval_method_to_one_string(EvalMethod) ++ "'"),
 			words("declaration not allowed for procedure"),
 			words("with determinism `"
-				++ determinism_to_string(InferredDetism)
-				++ "'.")], !IO),
-		globals__io_lookup_bool_option(verbose_errors, VerboseErrors,
-			!IO),
+                ++ determinism_to_string(InferredDetism) ++ "'.")], !IO),
+        globals__io_lookup_bool_option(verbose_errors, VerboseErrors, !IO),
 		(
 			VerboseErrors = yes,
 			solutions(get_valid_dets(EvalMethod), Detisms),
@@ -313,10 +295,11 @@
 	determinism(Detism),
 	valid_determinism_for_eval_method(EvalMethod, Detism) = yes.
 
-	% generate all the possible determinisms
+    % Generate all the possible determinisms.
+    %
 :- pred determinism(determinism).
 :- mode determinism(out) is multi.
-:- mode determinism(in) is det. % to ensure we don't forget any
+:- mode determinism(in) is det.         % To ensure we don't forget any.
 
 determinism(det).
 determinism(semidet).
@@ -333,10 +316,8 @@
 
 check_determinism_of_main(_PredId, _ProcId, PredInfo, ProcInfo,
 		!ModuleInfo, !IO) :-
-	%
-	% check that `main/2' has determinism `det' or `cc_multi',
-	% as required by the language reference manual
-	%
+    % Check that `main/2' has determinism `det' or `cc_multi',
+    % as required by the language reference manual.
 	proc_info_declared_determinism(ProcInfo, MaybeDetism),
 	(
 		pred_info_name(PredInfo) = "main",
@@ -348,16 +329,14 @@
 	->
 		proc_info_context(ProcInfo, Context1),
 		write_error_pieces(Context1, 0,
-			[words("Error: main/2 must be " ++
-				"`det' or `cc_multi'.")], !IO),
+            [words("Error: main/2 must be `det' or `cc_multi'.")], !IO),
 		module_info_incr_errors(!ModuleInfo)
 	;
 		true
 	).
 
 :- pred check_for_multisoln_func(pred_id::in, proc_id::in, pred_info::in,
-	proc_info::in, module_info::in, module_info::out,
-	io::di, io::uo) is det.
+    proc_info::in, module_info::in, module_info::out, io::di, io::uo) is det.
 
 check_for_multisoln_func(PredId, _ProcId, PredInfo, ProcInfo,
 		!ModuleInfo, !IO) :-
@@ -376,8 +355,7 @@
 		NumSolns \= at_most_one,
 		% ... but for which all the arguments are input ...
 		proc_info_argmodes(ProcInfo, PredArgModes),
-		pred_args_to_func_args(PredArgModes,
-			FuncArgModes, _FuncResultMode),
+        pred_args_to_func_args(PredArgModes, FuncArgModes, _FuncResultMode),
 		\+ (
 			list__member(FuncArgMode, FuncArgModes),
 			\+ mode_is_fully_input(!.ModuleInfo, FuncArgMode)
@@ -387,16 +365,13 @@
 		proc_info_context(ProcInfo, FuncContext),
 		proc_info_inst_varset(ProcInfo, InstVarSet),
 		PredModePieces = describe_one_pred_name_mode(!.ModuleInfo,
-			should_not_module_qualify, PredId, InstVarSet,
-			PredArgModes),
+            should_not_module_qualify, PredId, InstVarSet, PredArgModes),
 		Pieces = [words("Error: invalid determinism for")]
 			++ PredModePieces ++ [suffix(":"), nl,
 			words("the primary mode of a function cannot be"),
-			words("`" ++ mercury_det_to_string(InferredDetism) ++
-				"'.")],
+            words("`" ++ mercury_det_to_string(InferredDetism) ++ "'.")],
 		write_error_pieces(FuncContext, 0, Pieces, !IO),
-		globals__io_lookup_bool_option(verbose_errors, VerboseErrors,
-			!IO),
+        globals__io_lookup_bool_option(verbose_errors, VerboseErrors, !IO),
 		(
 			VerboseErrors = yes,
 			ExtMsg = func_primary_mode_det_msg,
@@ -426,12 +401,11 @@
 	( Cmp = tighter ->
 		det_info_get_pred_id(DetInfo, PredId),
 		det_info_get_proc_id(DetInfo, ProcId),
-		Msgs = [error_in_lambda(DeclaredDetism, InferredDetism,
-			Goal, GoalInfo, PredId, ProcId)]
+        Msgs = [error_in_lambda(DeclaredDetism, InferredDetism, Goal, GoalInfo,
+            PredId, ProcId)]
 	;
-		% we don't bother issuing warnings if
-		% the determinism was too loose; that will often
-		% be the case, and should not be warned about.
+        % We don't bother issuing warnings if the determinism was too loose;
+        % that will often be the case, and should not be warned about.
 		Msgs = []
 	).
 
@@ -447,10 +421,8 @@
 		should_not_module_qualify, proc(PredId, ProcId)),
 	Pieces = [words("In")] ++ ProcPieces ++ [suffix(":"), nl,
 		words(Message), nl,
-		words("Declared `"
-			++ determinism_to_string(DeclaredDetism)
-			++ "', inferred `"
-			++ determinism_to_string(InferredDetism)
+        words("Declared `" ++ determinism_to_string(DeclaredDetism)
+            ++ "', inferred `" ++ determinism_to_string(InferredDetism)
 			++ "'.")],
 	write_error_pieces(Context, 0, Pieces, !IO).
 
@@ -510,17 +482,16 @@
 
 	% The given goal should have determinism Desired, but doesn't.
 	% Find out what is wrong and print a report of the cause.
-
+    %
 :- pred det_diagnose_goal(hlds_goal::in, determinism::in,
-	list(switch_context)::in, det_info::in, bool::out, io::di, io::uo)
-	is det.
+    list(switch_context)::in, det_info::in, bool::out, io::di, io::uo) is det.
 
-det_diagnose_goal(Goal - GoalInfo, Desired, SwitchContext, DetInfo,
-		Diagnosed, !IO) :-
+det_diagnose_goal(Goal - GoalInfo, Desired, SwitchContext, DetInfo, Diagnosed,
+        !IO) :-
 	goal_info_get_determinism(GoalInfo, Actual),
 	( compare_determinisms(Desired, Actual, tighter) ->
-		det_diagnose_goal_2(Goal, GoalInfo, Desired, Actual,
-			SwitchContext, DetInfo, Diagnosed, !IO)
+        det_diagnose_goal_2(Goal, GoalInfo, Desired, Actual, SwitchContext,
+            DetInfo, Diagnosed, !IO)
 	;
 		Diagnosed = no
 	).
@@ -561,7 +532,7 @@
 	% the cases. Also, if only a subset of the constructors are handled,
 	% then it is semideterministic or worse - this is determined
 	% in switch_detection.m and handled via the CanFail field.
-
+    %
 det_diagnose_goal_2(switch(Var, SwitchCanFail, Cases), GoalInfo,
 		Desired, _Actual, SwitchContext, DetInfo, Diagnosed, !IO) :-
 	(
@@ -569,15 +540,14 @@
 		determinism_components(Desired, cannot_fail, _)
 	->
 		goal_info_get_context(GoalInfo, Context),
-		det_diagnose_write_switch_context(Context, SwitchContext,
-			DetInfo, yes, IsFirst, !IO),
+        det_diagnose_write_switch_context(Context, SwitchContext, DetInfo,
+            yes, IsFirst, !IO),
 		det_get_proc_info(DetInfo, ProcInfo),
 		proc_info_varset(ProcInfo, VarSet),
 		det_info_get_module_info(DetInfo, ModuleInfo),
 		VarStr = mercury_var_to_string(Var, VarSet, no),
 		(
-			det_lookup_var_type(ModuleInfo, ProcInfo, Var,
-				TypeDefn),
+            det_lookup_var_type(ModuleInfo, ProcInfo, Var, TypeDefn),
 			hlds_data__get_type_defn_body(TypeDefn, TypeBody),
 			ConsTable = TypeBody ^ du_type_cons_tag_values
 		->
@@ -590,8 +560,7 @@
 			Pieces = [words("The switch on "), fixed(VarStr),
 				words("can fail.")]
 		),
-		write_error_pieces_maybe_first_line(IsFirst, Context, 0,
-			Pieces, !IO),
+        write_error_pieces_maybe_first_line(IsFirst, Context, 0, Pieces, !IO),
 		Diagnosed1 = yes
 	;
 		Diagnosed1 = no
@@ -604,8 +573,7 @@
 		Desired, Actual, _, DetInfo, yes, !IO) :-
 	goal_info_get_context(GoalInfo, Context),
 	det_diagnose_atomic_goal(Desired, Actual,
-		det_report_call_context(Context, CallContext, DetInfo,
-			PredId, ModeId),
+        det_report_call_context(Context, CallContext, DetInfo, PredId, ModeId),
 		Context, !IO).
 
 det_diagnose_goal_2(generic_call(GenericCall, _, _, _), GoalInfo,
@@ -621,7 +589,8 @@
 	( First = yes, Last = yes ),
 	det_diagnose_atomic_goal(Desired, Actual,
 		det_report_unify_context(First, Last, Context, UnifyContext,
-			DetInfo, LHS, RHS), Context, !IO).
+            DetInfo, LHS, RHS),
+        Context, !IO).
 
 det_diagnose_goal_2(if_then_else(_Vars, Cond, Then, Else), _GoalInfo,
 		Desired, _Actual, SwitchContext, DetInfo, Diagnosed, !IO) :-
@@ -639,10 +608,8 @@
 	;
 		Diagnosed1 = no
 	),
-	det_diagnose_goal(Then, Desired, SwitchContext, DetInfo, Diagnosed2,
-		!IO),
-	det_diagnose_goal(Else, Desired, SwitchContext, DetInfo, Diagnosed3,
-		!IO),
+    det_diagnose_goal(Then, Desired, SwitchContext, DetInfo, Diagnosed2, !IO),
+    det_diagnose_goal(Else, Desired, SwitchContext, DetInfo, Diagnosed3, !IO),
 	bool__or(Diagnosed2, Diagnosed3, Diagnosed23),
 	bool__or(Diagnosed1, Diagnosed23, Diagnosed).
 
@@ -654,16 +621,15 @@
 		ActualCanFail = can_fail
 	->
 		goal_info_get_context(GoalInfo, Context),
-		write_error_pieces(Context, 0,
-			[words("Negated goal can succeed.")], !IO),
+        write_error_pieces(Context, 0, [words("Negated goal can succeed.")],
+            !IO),
 		Diagnosed = yes
 	;
 		DesiredSolns = at_most_zero,
 		ActualSolns \= at_most_zero
 	->
 		goal_info_get_context(GoalInfo, Context),
-		write_error_pieces(Context, 0,
-			[words("Negated goal can fail.")], !IO),
+        write_error_pieces(Context, 0, [words("Negated goal can fail.")], !IO),
 		Diagnosed = yes
 	;
 		Diagnosed = no
@@ -679,8 +645,8 @@
 		determinism_components(Desired, CanFail, _),
 		determinism_components(InternalDesired, CanFail, at_most_many)
 	),
-	det_diagnose_goal(Goal, InternalDesired, SwitchContext, DetInfo,
-		Diagnosed, !IO).
+    det_diagnose_goal(Goal, InternalDesired, SwitchContext, DetInfo, Diagnosed,
+        !IO).
 
 det_diagnose_goal_2(foreign_proc(_, _, _, _, _, _), GoalInfo, Desired,
 		_, _, _, yes, !IO) :-
@@ -691,7 +657,7 @@
 	write_error_pieces(Context, 0, Pieces, !IO).
 
 det_diagnose_goal_2(shorthand(_), _, _, _, _, _, _, !IO) :-
-	% these should have been expanded out by now
+    % These should have been expanded out by now.
 	error("det_diagnose_goal_2: unexpected shorthand").
 
 %-----------------------------------------------------------------------------%
@@ -701,14 +667,13 @@
 
 report_generic_call_context(Context, CallType, !IO) :-
 	hlds_goal__generic_call_id(CallType, CallId),
-	write_error_pieces(Context, 0, [words(call_id_to_string(CallId))],
-		!IO).
+    write_error_pieces(Context, 0, [words(call_id_to_string(CallId))], !IO).
 
 %-----------------------------------------------------------------------------%
 
 :- pred det_diagnose_atomic_goal(determinism::in, determinism::in,
-	pred(io, io)::in(pred(di, uo) is det), prog_context::in,
-	io::di, io::uo) is det.
+    pred(io, io)::in(pred(di, uo) is det), prog_context::in, io::di, io::uo)
+    is det.
 
 det_diagnose_atomic_goal(Desired, Actual, WriteContext, Context) -->
 	{ determinism_components(Desired, DesiredCanFail, DesiredSolns) },
@@ -756,12 +721,12 @@
 	list(switch_context)::in, det_info::in, bool::out, io::di, io::uo)
 	is det.
 
-det_diagnose_conj([], _Desired, _SwitchContext, _DetInfo, no) --> [].
+det_diagnose_conj([], _Desired, _SwitchContext, _DetInfo, no, !IO).
 det_diagnose_conj([Goal | Goals], Desired, SwitchContext, DetInfo,
-		Diagnosed) -->
-	det_diagnose_goal(Goal, Desired, SwitchContext, DetInfo, Diagnosed1),
-	det_diagnose_conj(Goals, Desired, SwitchContext, DetInfo, Diagnosed2),
-	{ bool__or(Diagnosed1, Diagnosed2, Diagnosed) }.
+        Diagnosed, !IO) :-
+    det_diagnose_goal(Goal, Desired, SwitchContext, DetInfo, Diagnosed1, !IO),
+    det_diagnose_conj(Goals, Desired, SwitchContext, DetInfo, Diagnosed2, !IO),
+    bool__or(Diagnosed1, Diagnosed2, Diagnosed).
 
 :- pred det_diagnose_disj(list(hlds_goal)::in, determinism::in, determinism::in,
 	list(switch_context)::in, det_info::in, int::in, int::out, bool::out,
@@ -810,8 +775,7 @@
 det_diagnose_switch(Var, [case(ConsId, Goal) | Cases], Desired,
 		SwitchContext0, DetInfo, Diagnosed, !IO) :-
 	SwitchContext1 = [switch_context(Var, ConsId) | SwitchContext0],
-	det_diagnose_goal(Goal, Desired, SwitchContext1, DetInfo, Diagnosed1,
-		!IO),
+    det_diagnose_goal(Goal, Desired, SwitchContext1, DetInfo, Diagnosed1, !IO),
 	det_diagnose_switch(Var, Cases, Desired, SwitchContext0, DetInfo,
 		Diagnosed2, !IO),
 	bool__or(Diagnosed1, Diagnosed2, Diagnosed).
@@ -839,11 +803,14 @@
 cons_id_list_to_pieces([], []).
 cons_id_list_to_pieces([ConsId | ConsIds], Pieces) :-
 	ConsIdStr = cons_id_to_string(ConsId),
-	( ConsIds = [] ->
+    (
+        ConsIds = [],
 		PiecesHead = [fixed(ConsIdStr ++ ".")]
-	; ConsIds = [_] ->
+    ;
+        ConsIds = [_],
 		PiecesHead = [fixed(ConsIdStr), fixed("or")]
 	;
+        ConsIds = [_, _ | _],
 		PiecesHead = [fixed(ConsIdStr ++ ",")]
 	),
 	cons_id_list_to_pieces(ConsIds, PiecesTail),
@@ -867,8 +834,7 @@
 	VarStr = mercury_var_to_string(Var, VarSet, no),
 	Pieces = [words("Inside the case"), fixed(ConsIdStr),
 		words("of the switch on"), fixed(VarStr), words(":")],
-	write_error_pieces_maybe_first_line(!.IsFirst, Context, 0, Pieces,
-		!IO),
+    write_error_pieces_maybe_first_line(!.IsFirst, Context, 0, Pieces, !IO),
 	!:IsFirst = no,
 	det_diagnose_write_switch_context(Context, SwitchContexts, DetInfo,
 		!IsFirst, !IO).
@@ -895,11 +861,10 @@
 	%
 	( Origin = special_pred(unify - _) ->
 		(
-			CallUnifyContext = yes(
-				call_unify_context(LHS, RHS, UC)),
+            CallUnifyContext = yes(call_unify_context(LHS, RHS, UC)),
 			First = yes, Last = yes,
-			det_report_unify_context(First, Last, Context, UC,
-				DetInfo, LHS, RHS, !IO)
+            det_report_unify_context(First, Last, Context, UC, DetInfo,
+                LHS, RHS, !IO)
 		;
 			% this shouldn't happen; every call to a compiler
 			% generated type-specific unification predicate
@@ -913,12 +878,11 @@
 		)
 	;
 		(
-			CallUnifyContext = yes(
-				call_unify_context(LHS, RHS, UC)),
+            CallUnifyContext = yes(call_unify_context(LHS, RHS, UC)),
 			First = yes,
 			Last = no,
-			det_report_unify_context(First, Last, Context, UC,
-				DetInfo, LHS, RHS, !IO),
+            det_report_unify_context(First, Last, Context, UC, DetInfo,
+                LHS, RHS, !IO),
 			io__write_string(":\n", !IO)
 		;
 			CallUnifyContext = no
@@ -934,21 +898,21 @@
 
 %-----------------------------------------------------------------------------%
 
-% det_report_unify_context prints out information about the context of an
-% error, i.e. where the error occurred.
-% The first two arguments are boolean flags that specify whether this is
-% the first part of a sentence (in which case we start the error message
-% with a capital letter) and whether it is the last part (in which case we
-% omit the word "in" on the final "... in unification ...").
-
+    % det_report_unify_context prints out information about the context of an
+    % error, i.e. where the error occurred.
+    %
+    % The first two arguments are boolean flags that specify whether this is
+    % the first part of a sentence (in which case we start the error message
+    % with a capital letter) and whether it is the last part (in which case we
+    % omit the word "in" on the final "... in unification ...").
+    %
 :- pred det_report_unify_context(bool::in, bool::in, prog_context::in,
 	unify_context::in, det_info::in, prog_var::in, unify_rhs::in,
 	io::di, io::uo) is det.
 
 det_report_unify_context(First0, Last, Context, UnifyContext, DetInfo,
 		LHS, RHS, !IO) :-
-	hlds_out__write_unify_context(First0, UnifyContext, Context, First,
-		!IO),
+    hlds_out__write_unify_context(First0, UnifyContext, Context, First, !IO),
 	prog_out__write_context(Context, !IO),
 	det_get_proc_info(DetInfo, ProcInfo),
 	proc_info_varset(ProcInfo, VarSet),
@@ -956,16 +920,22 @@
 		% We don't have the inst varset - it's not in the
 		% proc_info, so we'll just make one up....
 	varset__init(InstVarSet),
-	( First = yes ->
-		( Last = yes ->
+    (
+        First = yes,
+        (
+            Last = yes,
 			io__write_string("  Unification ", !IO)
 		;
+            Last = no,
 			io__write_string("  In unification ", !IO)
 		)
 	;
-		( Last = yes ->
+        First = no,
+        (
+            Last = yes,
 			io__write_string("  unification ", !IO)
 		;
+            Last = no,
 			io__write_string("  in unification ", !IO)
 		)
 	),
@@ -997,10 +967,11 @@
 :- type det_msg_type	--->	simple_code_warning ; call_warning ; error.
 
 det_report_and_handle_msgs(Msgs, !ModuleInfo, !IO) :-
-	( Msgs = [] ->
+    (
+        Msgs = []
 		% fast path for the usual case
-		true
 	;
+        Msgs = [_ | _],
 		det_report_msgs(Msgs, !.ModuleInfo, WarnCnt, ErrCnt, !IO),
 		globals__io_lookup_bool_option(halt_at_warn, HaltAtWarn, !IO),
 		(
@@ -1025,16 +996,22 @@
 		0, WarnCnt, 0, ErrCnt, !IO).
 
 :- pred det_report_msgs_2(list(det_msg)::in, bool::in, bool::in,
-	module_info::in, int::in, int::out, int::in, int::out,
-	io::di, io::uo) is det.
+    module_info::in, int::in, int::out, int::in, int::out, io::di, io::uo)
+    is det.
 
 det_report_msgs_2([], _, _, _ModuleInfo, !WarnCnt, !ErrCnt, !IO).
 det_report_msgs_2([Msg | Msgs], WarnSimple, WarnCalls, ModuleInfo,
 		!WarnCnt, !ErrCnt, !IO) :-
 	det_msg_get_type(Msg, MsgType),
-	( WarnSimple = no, MsgType = simple_code_warning ->
+    (
+        WarnSimple = no,
+        MsgType = simple_code_warning
+    ->
 		true
-	; WarnCalls = no, MsgType = call_warning ->
+    ;
+        WarnCalls = no,
+        MsgType = call_warning
+    ->
 		true
 	;
 		det_report_msg(Msg, ModuleInfo, !IO),
@@ -1261,8 +1238,7 @@
 			words("representations, but I'm not going to do that"),
 			words("implicitly. (If that's really what you want,"),
 			words("you must do it explicitly.)")],
-		write_error_pieces_not_first_line(Context, 0, VerbosePieces,
-			!IO)
+        write_error_pieces_not_first_line(Context, 0, VerbosePieces, !IO)
 	;
 		VerboseErrors = no
 	).
@@ -1272,8 +1248,7 @@
 	(
 		GoalContext = switch,
 		VarStr = mercury_var_to_string(Var, VarSet, no),
-		Pieces0 = [words("In switch on variable `" ++ VarStr ++ "':"),
-			nl]
+        Pieces0 = [words("In switch on variable `" ++ VarStr ++ "':"), nl]
 	;
 		GoalContext = unify(UnifyContext),
 		hlds_out__unify_context_to_pieces(UnifyContext, [], Pieces0)
@@ -1311,8 +1286,7 @@
 			words("representations, but I'm not going to do that"),
 			words("implicitly. (If that's really what you want,"),
 			words("you must do it explicitly.)")],
-		write_error_pieces_not_first_line(Context, 0, VerbosePieces,
-			!IO)
+        write_error_pieces_not_first_line(Context, 0, VerbosePieces, !IO)
 	;
 		VerboseErrors = no
 	).
@@ -1342,28 +1316,21 @@
 	write_error_pieces(Context, 0,
 		[words("In")] ++ PredPieces ++ [suffix(":"), nl,
 		words("Determinism error in lambda expression."), nl,
-		words("Declared `"
-			++ determinism_to_string(DeclaredDetism)
-			++ "', inferred `"
-			++ determinism_to_string(InferredDetism)
+        words("Declared `" ++ determinism_to_string(DeclaredDetism)
+            ++ "', inferred `" ++ determinism_to_string(InferredDetism)
 			++ "'.")], !IO),
 	globals__io_get_globals(Globals, !IO),
 	module_info_pred_proc_info(ModuleInfo, PredId, ProcId, _, ProcInfo),
 	proc_info_vartypes(ProcInfo, VarTypes),
-	det_info_init(ModuleInfo, VarTypes, PredId, ProcId, Globals,
-		DetInfo),
+    det_info_init(ModuleInfo, VarTypes, PredId, ProcId, Globals, DetInfo),
 	det_diagnose_goal(Goal, DeclaredDetism, [], DetInfo, _, !IO).
 det_report_msg(par_conj_not_det(InferredDetism, PredId,
 		ProcId, GoalInfo, Goals), ModuleInfo, !IO) :-
 	goal_info_get_context(GoalInfo, Context),
 	determinism_components(InferredDetism, CanFail, MaxSoln),
-	(
-		CanFail \= cannot_fail
-	->
+    ( CanFail \= cannot_fail ->
 		First = "Error: parallel conjunct may fail."
-	;
-		MaxSoln = at_most_many
-	->
+    ; MaxSoln = at_most_many ->
 		First = "Error: parallel conjunct may have multiple solutions."
 	;
 		error("strange determinism error for parallel conjunction")
@@ -1374,8 +1341,7 @@
 	globals__io_get_globals(Globals, !IO),
 	module_info_pred_proc_info(ModuleInfo, PredId, ProcId, _, ProcInfo),
 	proc_info_vartypes(ProcInfo, VarTypes),
-	det_info_init(ModuleInfo, VarTypes, PredId, ProcId, Globals,
-		DetInfo),
+    det_info_init(ModuleInfo, VarTypes, PredId, ProcId, Globals, DetInfo),
 	det_diagnose_conj(Goals, det, [], DetInfo, _, !IO).
 det_report_msg(pragma_c_code_without_det_decl(PredId, ProcId),
 		ModuleInfo, !IO) :-
@@ -1401,8 +1367,7 @@
 		VerboseErrors = yes,
 		VerbosePieces = [words("Valid determinisms are "),
 			words("det, cc_multi and erroneous.")],
-		write_error_pieces_not_first_line(Context, 0, VerbosePieces,
-			!IO)
+        write_error_pieces_not_first_line(Context, 0, VerbosePieces, !IO)
 	;
 		VerboseErrors = no
 	).
@@ -1423,20 +1388,17 @@
 		!IO) :-
 	module_info_get_pragma_exported_procs(ModuleInfo, ExportedProcs),
 	(
-		get_exported_proc_context(ExportedProcs, PredId, ProcId,
-			Context)
+        get_exported_proc_context(ExportedProcs, PredId, ProcId, Context)
 	->
 		Pieces = [words("Error: "),
 			  fixed(":- pragma export' declaration"),
-			  words("for a procedure that has"),
-			  words("a determinism of"),
-			  fixed(hlds_out.determinism_to_string(Detism)
-				++ ",")
+            words("for a procedure that has a determinism of"),
+            fixed(hlds_out.determinism_to_string(Detism) ++ ",")
 			],
 		error_util.write_error_pieces(Context, 0, Pieces, !IO)
 	;
-		unexpected(this_file, "Cannot find proc in table of "
-			++ "pragma exported procs")
+        unexpected(this_file,
+            "Cannot find proc in table of pragma exported procs")
 	).
 det_report_msg(promise_equivalent_solutions_missing_vars(Context, VarSet, Vars),
 		_, !IO) :-
@@ -1489,6 +1451,7 @@
 	;
 		get_exported_proc_context(Procs, PredId, ProcId, Context)
 	).
+
 %-----------------------------------------------------------------------------%
 
 :- func det_report_seen_call_id(module_info, seen_call_id)
@@ -1497,8 +1460,8 @@
 det_report_seen_call_id(ModuleInfo, SeenCall) = Pieces :-
 	(
 		SeenCall = seen_call(PredId, _),
-		PredPieces = describe_one_pred_name(ModuleInfo,
-			should_module_qualify, PredId),
+        PredPieces = describe_one_pred_name(ModuleInfo, should_module_qualify,
+            PredId),
 		Pieces = [words("call to") | PredPieces]
 	;
 		SeenCall = higher_order_call,
Index: compiler/hlds_out.m
===================================================================
RCS file: /home/mercury/mercury1/repository/mercury/compiler/hlds_out.m,v
retrieving revision 1.362
diff -u -b -r1.362 hlds_out.m
--- compiler/hlds_out.m	14 Aug 2005 03:20:38 -0000	1.362
+++ compiler/hlds_out.m	14 Aug 2005 03:22:25 -0000
@@ -1,4 +1,6 @@
 %-----------------------------------------------------------------------------%
+% vim: ft=mercury ts=4 sw=4 et
+%-----------------------------------------------------------------------------%
 % Copyright (C) 1994-2005 The University of Melbourne.
 % This file may only be copied under the terms of the GNU General
 % Public License - see the file COPYING in the Mercury distribution.
@@ -68,7 +70,7 @@
 	% except in some special cases where the predicate name is mangled
 	% and we can print a more meaningful identification of the predicate
 	% in question.
-
+    %
 :- pred hlds_out__write_pred_id(module_info::in, pred_id::in, io::di, io::uo)
 	is det.
 
@@ -81,11 +83,11 @@
 :- pred hlds_out__write_call_id(call_id::in, io::di, io::uo) is det.
 :- func hlds_out__call_id_to_string(call_id) = string.
 
-	% Write "argument %i of call to pred_or_func `foo/n'".
-	% The pred_markers argument is used to tell if the calling
-	% predicate is a type class method implementation; if so,
-	% we omit the "call to" part, since the user didn't write
-	% any explicit call.
+    % Write "argument %i of call to pred_or_func `foo/n'". The pred_markers
+    % argument is used to tell if the calling predicate is a type class method
+    % implementation; if so, we omit the "call to" part, since the user didn't
+    % write any explicit call.
+    %
 :- pred hlds_out__write_call_arg_id(call_id::in, int::in, pred_markers::in,
 	io::di, io::uo) is det.
 :- func hlds_out__call_arg_id_to_string(call_id, int, pred_markers) = string.
@@ -98,12 +100,11 @@
 :- pred hlds_out__write_unify_context(unify_context::in, prog_context::in,
 	io::di, io::uo) is det.
 
-	% hlds_out__write_unify_context_first/6 is the
-	% same as above, except that it also takes and returns a bool
-	% which specifies whether this is the start of a sentence.
-	% If the first argument is `yes', then
-	% it means this is the first line of an error message, so
-	% the message starts with a capital letter, e.g.
+    % hlds_out__write_unify_context_first/6 is the same as above, except that
+    % it also takes and returns a bool which specifies whether this is the
+    % start of a sentence. If the first argument is `yes', then it means
+    % this is the first line of an error message, so the message starts with
+    % a capital letter, e.g.
 	%	foo.m:123:   In argument 3 of functor `foo/5':
 	%	foo.m:123:   in unification of `X' and `blah':
 	% The bool returned as the fourth argument will be `no' unless nothing
@@ -130,11 +131,12 @@
 %-----------------------------------------------------------------------------%
 
 	% Print out an entire hlds structure.
-
+    %
 :- pred hlds_out__write_hlds(int::in, module_info::in, io::di, io::uo) is det.
 
 	% hlds_out__write_clause(Indent, ModuleInfo, PredId, VarSet,
 	%	AppendVarNums, HeadVars, PredOrFunc, Clauses, MaybeVarTypes).
+    %
 :- pred hlds_out__write_clauses(int::in, module_info::in, pred_id::in,
 	prog_varset::in, bool::in, list(prog_var)::in, pred_or_func::in,
 	list(clause)::in, maybe_vartypes::in, io::di, io::uo) is det.
@@ -142,6 +144,7 @@
 	% hlds_out__write_clause(Indent, ModuleInfo, PredId, VarSet,
 	%	AppendVarNums, HeadTerms, PredOrFunc, Clause,
 	%	UseDeclaredModes, MaybeVarTypes).
+    %
 :- pred hlds_out__write_clause(int::in, module_info::in, pred_id::in,
 	prog_varset::in, bool::in, list(prog_term)::in, pred_or_func::in,
 	clause::in, bool::in, maybe_vartypes::in, io::di, io::uo) is det.
@@ -157,7 +160,7 @@
 	% of indentation to be used within the goal. The string says what
 	% should end the line containing the goal; it should include a newline
 	% character, but may also contain other characters before that.
-
+    %
 :- pred hlds_out__write_goal(hlds_goal::in, module_info::in, prog_varset::in,
 	bool::in, int::in, string::in, io::di, io::uo) is det.
 
@@ -169,7 +172,7 @@
 	% within the goal. The string says what should be on the line
 	% between each goal; it should include a newline character,
 	% but may also contain other characters before that.
-
+    %
 :- pred hlds_out__write_goal_list(list(hlds_goal)::in, module_info::in,
 	prog_varset::in, bool::in, int::in, string::in, maybe_vartypes::in,
 	io::di, io::uo) is det.
@@ -177,14 +180,14 @@
 	% Print out a functor and its arguments. The prog_varset gives
 	% the context. The boolean says whether variables should have their
 	% numbers appended to them.
-
+    %
 :- pred hlds_out__write_functor(const::in, list(prog_var)::in, prog_varset::in,
 	bool::in, io::di, io::uo) is det.
 
 	% Print out a cons_id and arguments. The module_info and prog_varset
 	% give the context. The boolean says whether variables should have
 	% their numbers appended to them.
-
+    %
 :- pred hlds_out__write_functor_cons_id(cons_id::in, list(prog_var)::in,
 	prog_varset::in, module_info::in, bool::in, io::di, io::uo) is det.
 
@@ -192,7 +195,7 @@
 	% the varsets give the context of the rhs. The boolean says whether
 	% variables should have their numbers appended to them. The integer
 	% gives the level of indentation to be used within the rhs.
-
+    %
 :- pred hlds_out__write_unify_rhs(unify_rhs::in, module_info::in,
 	prog_varset::in, inst_varset::in, bool::in, int::in, io::di, io::uo)
 	is det.
@@ -201,7 +204,7 @@
 	% (e.g. for a lambda expressions). The varsets gives the context.
 	% The boolean says whether variables should have their numbers
 	% appended to them.
-
+    %
 :- pred hlds_out__write_var_modes(list(prog_var)::in, list(mode)::in,
 	prog_varset::in, inst_varset::in, bool::in, io::di, io::uo) is det.
 
@@ -209,11 +212,11 @@
 	int::in, io::di, io::uo) is det.
 
 	% Find the name of a marker.
-
+    %
 :- pred hlds_out__marker_name(marker::in, string::out) is det.
 
 	% Print out the name of a marker.
-
+    %
 :- pred hlds_out__write_marker(marker::in, io::di, io::uo) is det.
 
 :- type maybe_vartypes
@@ -221,6 +224,7 @@
 	;	no.
 
 	% Convert a mode or inst to a term representation.
+    %
 :- func mode_to_term(mode) = prog_term.
 :- func inst_to_term(inst) = prog_term.
 
@@ -240,7 +244,7 @@
 	% have been expanded out; recursive insts have their self-referential
 	% parts printed out as elipses ("...").
 	% (These routines are used for outputting insts in mode errors.)
-
+    %
 :- pred mercury_output_expanded_inst((inst)::in, inst_varset::in,
 	module_info::in, io::di, io::uo) is det.
 :- func mercury_expanded_inst_to_string(inst, inst_varset, module_info)
@@ -349,7 +353,6 @@
 	% The code of this predicate duplicates the functionality of
 	% hlds_error_util__describe_one_pred_name. Changes here should be made
 	% there as well.
-
 hlds_out__write_pred_id(ModuleInfo, PredId, !IO) :-
 	module_info_preds(ModuleInfo, PredTable),
 	( map__search(PredTable, PredId, PredInfo) ->
@@ -374,17 +377,15 @@
 			pred_info_get_markers(PredInfo, Markers),
 			check_marker(Markers, class_instance_method)
 		->
-			io__write_string("type class method implementation",
-				!IO)
+            io__write_string("type class method implementation", !IO)
 		;
 			pred_info_get_goal_type(PredInfo, promise(PromiseType))
 		->
-			io__write_string("`" ++
-				prog_out__promise_to_string(PromiseType)
+            io__write_string("`" ++ prog_out__promise_to_string(PromiseType)
 				++ "' declaration", !IO)
 		;
-			write_simple_call_id(PredOrFunc,
-				qualified(Module, Name), Arity, !IO)
+            write_simple_call_id(PredOrFunc, qualified(Module, Name), Arity,
+                !IO)
 		)
 	;
 		% The predicate has been deleted, so we print what we can.
@@ -421,10 +422,8 @@
 :- func hlds_out__generic_call_id_to_string(generic_call_id) = string.
 
 hlds_out__generic_call_id_to_string(higher_order(Purity, PredOrFunc, _)) =
-	purity_prefix_to_string(Purity)
-		++ "higher-order "
-		++ prog_out__pred_or_func_to_full_str(PredOrFunc)
-		++ " call".
+    purity_prefix_to_string(Purity) ++ "higher-order "
+    ++ prog_out__pred_or_func_to_full_str(PredOrFunc) ++ " call".
 hlds_out__generic_call_id_to_string(class_method(_ClassId, MethodId)) =
 	simple_call_id_to_string(MethodId).
 hlds_out__generic_call_id_to_string(cast(CastType)) =
@@ -457,8 +456,7 @@
 		% rather than "in argument N of call to".
 		Str1 = ""
 	;
-		Str1 = hlds_out__arg_number_to_string(CallId, ArgNum)
-			++ " of "
+        Str1 = hlds_out__arg_number_to_string(CallId, ArgNum) ++ " of "
 	),
 	(
 		(
@@ -534,8 +532,8 @@
 	simple_call_id::in, int::in, io::di, io::uo) is det.
 
 hlds_out__write_aditi_builtin_arg_number(Builtin, SimpleCallId, ArgNum, !IO) :-
-	Str = hlds_out__aditi_builtin_arg_number_to_string(Builtin,
-		SimpleCallId, ArgNum),
+    Str = hlds_out__aditi_builtin_arg_number_to_string(Builtin, SimpleCallId,
+        ArgNum),
 	io__write_string(Str, !IO).
 
 :- func hlds_out__aditi_builtin_arg_number_to_string(aditi_builtin,
@@ -557,8 +555,7 @@
 		_, ArgNum) = Str :-
 	Str = "argument " ++ int_to_string(ArgNum).
 hlds_out__aditi_builtin_arg_number_to_string(
-		aditi_bulk_update(_, _, sym_name_and_closure),
-		_, ArgNum) = Str :-
+        aditi_bulk_update(_, _, sym_name_and_closure), _, ArgNum) = Str :-
 	% The original goal had a sym_name/arity
 	% at the front of the argument list.
 	Str = "argument " ++ int_to_string(ArgNum + 1).
@@ -571,10 +568,10 @@
 hlds_out__write_unify_context(First0, UnifyContext, Context, First, !IO) :-
 	UnifyContext = unify_context(MainContext, RevSubContexts),
 	list__reverse(RevSubContexts, SubContexts),
-	hlds_out__write_unify_main_context(First0, MainContext, Context,
-		First1, !IO),
-	hlds_out__write_unify_sub_contexts(First1, SubContexts, Context,
-		First, !IO).
+    hlds_out__write_unify_main_context(First0, MainContext, Context, First1,
+        !IO),
+    hlds_out__write_unify_sub_contexts(First1, SubContexts, Context, First,
+        !IO).
 
 hlds_out__unify_context_to_pieces(UnifyContext, !Pieces) :-
 	UnifyContext = unify_context(MainContext, RevSubContexts),
@@ -622,8 +619,7 @@
 	!:Pieces = !.Pieces ++ [words("of clause head:"), nl].
 hlds_out__unify_main_context_to_pieces(head_result, !Pieces) :-
 	hlds_out__start_in_message_to_pieces(!Pieces),
-	!:Pieces = !.Pieces ++
-		[words("function result term of clause head:"), nl].
+    !:Pieces = !.Pieces ++ [words("function result term of clause head:"), nl].
 hlds_out__unify_main_context_to_pieces(call(CallId, ArgNum), !Pieces) :-
 	hlds_out__start_in_message_to_pieces(!Pieces),
 	% The markers argument below is used only for type class method
@@ -651,8 +647,7 @@
 	io__write_string(" of functor `", !IO),
 	hlds_out__write_cons_id(ConsId, !IO),
 	io__write_string("':\n", !IO),
-	hlds_out__write_unify_sub_contexts(no, SubContexts, Context, First,
-		!IO).
+    hlds_out__write_unify_sub_contexts(no, SubContexts, Context, First, !IO).
 
 :- pred hlds_out__unify_sub_contexts_to_pieces(unify_sub_contexts::in,
 	list(format_component)::in, list(format_component)::out) is det.
@@ -662,8 +657,7 @@
 		!Pieces) :-
 	hlds_out__in_argument_to_pieces(ArgNum, !Pieces),
 	NewPieces = [words("of functor"),
-		fixed("`" ++ cons_id_to_string(ConsId) ++ "':"),
-		nl],
+        fixed("`" ++ cons_id_to_string(ConsId) ++ "':"), nl],
 	!:Pieces = !.Pieces ++ NewPieces,
 	hlds_out__unify_sub_contexts_to_pieces(SubContexts, !Pieces).
 
@@ -804,8 +798,7 @@
 		DumpPredId >= 0
 	->
 		( PredIdInt = DumpPredId ->
-			hlds_out__write_pred(Indent, ModuleInfo, PredId,
-				PredInfo, !IO)
+            hlds_out__write_pred(Indent, ModuleInfo, PredId, PredInfo, !IO)
 		;
 			true
 		)
@@ -814,19 +807,17 @@
 			\+ string__contains_char(Verbose, 'I'),
 			pred_info_is_imported(PredInfo)
 		;
-			% For pseudo-imported predicates (i.e. unification
-			% preds), only print them if we are using a local
-			% mode for them.
+            % For pseudo-imported predicates (i.e. unification preds),
+            % only print them if we are using a local mode for them.
 			\+ string__contains_char(Verbose, 'I'),
 			pred_info_is_pseudo_imported(PredInfo),
 			ProcIds = pred_info_procids(PredInfo),
 			hlds_pred__in_in_unification_proc_id(ProcId),
 			ProcIds = [ProcId]
 		;
-			% We dump unification and other compiler-generated
-			% special predicates if suboption 'U' is on. We don't
-			% need that information to understand how the program
-			% has been transformed.
+            % We dump unification and other compiler-generated special
+            % predicates if suboption 'U' is on. We don't need that information
+            % to understand how the program has been transformed.
 			\+ string__contains_char(Verbose, 'U'),
 			is_unify_or_compare_pred(PredInfo)
 		)
@@ -863,28 +854,24 @@
 		AppendVarNums = no
 	),
 	( string__contains_char(Verbose, 'C') ->
-		% Information about predicates is dumped if 'C'
-		% suboption is on.
+        % Information about predicates is dumped if 'C' suboption is on.
 		(
 			PredOrFunc = predicate,
 			mercury_output_pred_type(TVarSet, ExistQVars,
-				qualified(Module, PredName),
-				ArgTypes, no, Purity, ClassContext, Context,
-				AppendVarNums, !IO)
+                qualified(Module, PredName), ArgTypes, no, Purity,
+                ClassContext, Context, AppendVarNums, !IO)
 		;
 			PredOrFunc = function,
-			pred_args_to_func_args(ArgTypes, FuncArgTypes,
-				FuncRetType),
+            pred_args_to_func_args(ArgTypes, FuncArgTypes, FuncRetType),
 			mercury_output_func_type(TVarSet, ExistQVars,
-				qualified(Module, PredName), FuncArgTypes,
-				FuncRetType, no, Purity, ClassContext,
-				Context, AppendVarNums, !IO)
+                qualified(Module, PredName), FuncArgTypes, FuncRetType, no,
+                Purity, ClassContext, Context, AppendVarNums, !IO)
 		)
 	;
 		true
 	),
-	ClausesInfo = clauses_info(VarSet, _, _, VarTypes, HeadVars,
-		ClausesRep, RttiVarMaps, _),
+    ClausesInfo = clauses_info(VarSet, _, _, VarTypes, HeadVars, ClausesRep,
+        RttiVarMaps, _),
 	( string__contains_char(Verbose, 'C') ->
 		hlds_out__write_indent(Indent, !IO),
 		io__write_string("% pred id: ", !IO),
@@ -900,20 +887,21 @@
 		io__write(GoalType, !IO),
 		io__write_string("\n", !IO),
 		markers_to_marker_list(Markers, MarkerList),
-		( MarkerList = [] ->
-			true
+        (
+            MarkerList = []
 		;
+            MarkerList = [_ | _],
 			io__write_string("% markers: ", !IO),
 			hlds_out__write_marker_list(MarkerList, !IO),
 			io__write_string("\n", !IO)
 		),
-		hlds_out__write_rtti_varmaps(Indent, AppendVarNums,
-			RttiVarMaps, VarSet, TVarSet, !IO),
+        hlds_out__write_rtti_varmaps(Indent, AppendVarNums, RttiVarMaps,
+            VarSet, TVarSet, !IO),
 		( map__is_empty(Proofs) ->
 			true
 		;
-			hlds_out__write_constraint_proofs(Indent, TVarSet,
-				Proofs, AppendVarNums, !IO),
+            hlds_out__write_constraint_proofs(Indent, TVarSet, Proofs,
+                AppendVarNums, !IO),
 			io__write_string("\n", !IO)
 		),
 		( map__is_empty(ConstraintMap) ->
@@ -928,36 +916,35 @@
 		% with the condition `string__contains_char(Verbose, 'C')'?
 		% Shouldn't it be dependent on a different letter?
 
-		( Indexes = [] ->
-			true
+        (
+            Indexes = []
 		;
+            Indexes = [_ | _],
 			io__write_string("% indexes: ", !IO),
-			io__write_list(Indexes, ", ",
-				mercury_output_index_spec, !IO),
+            io__write_list(Indexes, ", ", mercury_output_index_spec, !IO),
 			io__nl(!IO)
 		),
 
-		( HeadTypeParams \= [] ->
+        (
+            HeadTypeParams = [_ | _],
 			io__write_string("% head_type_params:\n", !IO),
 			io__write_string("% ", !IO),
-			mercury_output_vars(HeadTypeParams, TVarSet,
-				AppendVarNums, !IO),
+            mercury_output_vars(HeadTypeParams, TVarSet, AppendVarNums, !IO),
 			io__write_string("\n", !IO)
 		;
-			true
+            HeadTypeParams = []
 		),
-		hlds_out__write_var_types(Indent, VarSet, AppendVarNums,
-			VarTypes, TVarSet, !IO),
+        hlds_out__write_var_types(Indent, VarSet, AppendVarNums, VarTypes,
+            TVarSet, !IO),
 
 		get_clause_list(ClausesRep, Clauses),
 		(
 			Clauses = [_ | _],
 			set_dump_opts_for_clauses(SavedDumpString, !IO),
-			hlds_out__write_clauses(Indent, ModuleInfo, PredId,
-				VarSet, AppendVarNums, HeadVars, PredOrFunc,
-				Clauses, no, !IO),
-			globals__io_set_option(dump_hlds_options,
-				string(SavedDumpString), !IO)
+            hlds_out__write_clauses(Indent, ModuleInfo, PredId, VarSet,
+                AppendVarNums, HeadVars, PredOrFunc, Clauses, no, !IO),
+            globals__io_set_option(dump_hlds_options, string(SavedDumpString),
+                !IO)
 		;
 			Clauses = []
 		),
@@ -965,33 +952,27 @@
 		pred_info_get_origin(PredInfo, Origin),
 		(
 			Origin = instance_method(MethodConstraints),
-			MethodConstraints = instance_method_constraints(
-				ClassId, InstanceTypes, InstanceConstraints,
-				ClassMethodConstraints),
-			io__write_string("% instance method constraints:\n",
-				!IO),
+            MethodConstraints = instance_method_constraints(ClassId,
+                InstanceTypes, InstanceConstraints, ClassMethodConstraints),
+            io__write_string("% instance method constraints:\n", !IO),
 			ClassId = class_id(ClassName, _),
 			mercury_output_constraint(TVarSet, AppendVarNums,
 				constraint(ClassName, InstanceTypes), !IO),
 			io__nl(!IO),
 			io__write_string("instance constraints: ", !IO),
 			io__write_list(InstanceConstraints, ", ",
-				mercury_output_constraint(TVarSet,
-					AppendVarNums), !IO),
+                mercury_output_constraint(TVarSet, AppendVarNums), !IO),
 			io__nl(!IO),
 
-			ClassMethodConstraints = constraints(
-				MethodUnivConstraints,
+            ClassMethodConstraints = constraints(MethodUnivConstraints,
 				MethodExistConstraints),
 			io__write_string("method univ constraints: ", !IO),
 			io__write_list(MethodUnivConstraints, ", ",
-				mercury_output_constraint(TVarSet,
-					AppendVarNums), !IO),
+                mercury_output_constraint(TVarSet, AppendVarNums), !IO),
 			io__nl(!IO),
 			io__write_string("method exist constraints: ", !IO),
 			io__write_list(MethodExistConstraints, ", ",
-				mercury_output_constraint(TVarSet,
-					AppendVarNums), !IO),
+                mercury_output_constraint(TVarSet, AppendVarNums), !IO),
 			io__nl(!IO)
 		;
 			Origin = special_pred(_),
@@ -1124,8 +1105,7 @@
 hlds_out__write_clauses(Indent, ModuleInfo, PredId, VarSet, AppendVarNums,
 		HeadVars, PredOrFunc, Clauses0, TypeQual, !IO) :-
 	hlds_out__write_clauses_2(Indent, ModuleInfo, PredId, VarSet,
-		AppendVarNums, HeadVars, PredOrFunc, Clauses0, TypeQual,
-		1, !IO).
+        AppendVarNums, HeadVars, PredOrFunc, Clauses0, TypeQual, 1, !IO).
 
 :- pred hlds_out__write_clauses_2(int::in, module_info::in, pred_id::in,
 	prog_varset::in, bool::in, list(prog_var)::in, pred_or_func::in,
@@ -1151,16 +1131,14 @@
 		true
 	).
 
-hlds_out__write_clause(Indent, ModuleInfo, PredId, VarSet,
-		AppendVarNums, HeadTerms, PredOrFunc, Clause,
-		UseDeclaredModes, TypeQual, !IO) :-
+hlds_out__write_clause(Indent, ModuleInfo, PredId, VarSet, AppendVarNums,
+        HeadTerms, PredOrFunc, Clause, UseDeclaredModes, TypeQual, !IO) :-
 	Clause = clause(Modes, Goal, Lang, Context),
 	Indent1 = Indent + 1,
 	globals__io_lookup_string_option(dump_hlds_options, Verbose, !IO),
 	( string__contains_char(Verbose, 'm') ->
 		hlds_out__write_indent(Indent, !IO),
-		io__write_string("% Modes for which this clause applies: ",
-			!IO),
+        io__write_string("% Modes for which this clause applies: ", !IO),
 		ModeInts = list__map(proc_id_to_int, Modes),
 		hlds_out__write_intlist(ModeInts, !IO),
 		io__write_string("\n", !IO)
@@ -1182,16 +1160,16 @@
 		; Modes = ProcIds
 		)
 	->
-		hlds_out__write_clause_head(ModuleInfo, PredId, VarSet,
-			AppendVarNums, HeadTerms, PredOrFunc, !IO)
+        hlds_out__write_clause_head(ModuleInfo, PredId, VarSet, AppendVarNums,
+            HeadTerms, PredOrFunc, !IO)
 	;
 		% If Modes contains more than one mode, the output will have
 		% multiple clause heads. This won't be pretty and it won't be
 		% syntactically valid, but it is more useful for debugging
 		% than a compiler abort during the dumping process.
-		hlds_out__write_annotated_clause_heads(ModuleInfo, Context,
-			PredId, Modes, VarSet, AppendVarNums, HeadTerms,
-			PredOrFunc, UseDeclaredModes, !IO)
+        hlds_out__write_annotated_clause_heads(ModuleInfo, Context, PredId,
+            Modes, VarSet, AppendVarNums, HeadTerms, PredOrFunc,
+            UseDeclaredModes, !IO)
 	),
 	( Goal = conj([]) - _GoalInfo ->
 		io__write_string(".\n", !IO)
@@ -1223,27 +1201,22 @@
 	io::di, io::uo) is det.
 
 hlds_out__write_annotated_clause_head(ModuleInfo, Context, PredId, ProcId,
-		VarSet, AppendVarNums, HeadTerms,
-		PredOrFunc, UseDeclaredModes, !IO) :-
+        VarSet, AppendVarNums, HeadTerms, PredOrFunc, UseDeclaredModes, !IO) :-
 	module_info_pred_info(ModuleInfo, PredId, PredInfo),
 	pred_info_procedures(PredInfo, Procedures),
 	( map__search(Procedures, ProcId, ProcInfo) ->
 		%
-		% When writing `.opt' files, use the declared
-		% argument modes so that the modes are guaranteed
-		% to be syntactically identical to those in the
-		% original program. The test in make_hlds.m to
-		% check whether a clause matches a procedure
-		% tests for syntactic identity (roughly).
-		% The modes returned by proc_info_argmodes may have
-		% been slightly expanded by propagate_types_into_modes.
+        % When writing `.opt' files, use the declared argument modes so that
+        % the modes are guaranteed to be syntactically identical to those
+        % in the original program. The test in add_clause.m to check whether
+        % a clause matches a procedure tests for syntactic identity (roughly).
+        % The modes returned by proc_info_argmodes may have been slightly
+        % expanded by propagate_types_into_modes.
 		%
-		% We can't use the declared argument modes when writing
-		% HLDS dumps because the modes of the type-infos will
-		% not have been added, so the call to
-		% assoc_list__from_corresponding_lists below
-		% will abort. `.opt' files are written before
-		% the polymorphism pass.
+        % We can't use the declared argument modes when writing HLDS dumps
+        % because the modes of the type-infos will not have been added,
+        % so the call to assoc_list__from_corresponding_lists below
+        % will abort. `.opt' files are written before the polymorphism pass.
 		%
 		( UseDeclaredModes = yes ->
 			proc_info_declared_argmodes(ProcInfo, ArgModes)
@@ -1254,8 +1227,8 @@
 			AnnotatedPairs),
 		AnnotatedHeadTerms = list__map(add_mode_qualifier(Context),
 			AnnotatedPairs),
-		hlds_out__write_clause_head(ModuleInfo, PredId, VarSet,
-			AppendVarNums, AnnotatedHeadTerms, PredOrFunc, !IO)
+        hlds_out__write_clause_head(ModuleInfo, PredId, VarSet, AppendVarNums,
+            AnnotatedHeadTerms, PredOrFunc, !IO)
 	;
 		% This procedure, even though it existed in the past, has been
 		% eliminated.
@@ -1273,30 +1246,28 @@
 	(
 		PredOrFunc = function,
 		pred_args_to_func_args(HeadTerms, FuncArgs, RetVal),
-		hlds_out__write_qualified_functor_with_term_args(
-			ModuleName, term__atom(PredName), FuncArgs, VarSet,
-			AppendVarNums, !IO),
+        hlds_out__write_qualified_functor_with_term_args(ModuleName,
+            term__atom(PredName), FuncArgs, VarSet, AppendVarNums, !IO),
 		io__write_string(" = ", !IO),
 		mercury_output_term(RetVal, VarSet, AppendVarNums,
 			next_to_graphic_token, !IO)
 	;
 		PredOrFunc = predicate,
-		hlds_out__write_qualified_functor_with_term_args(
-			ModuleName, term__atom(PredName), HeadTerms, VarSet,
-			AppendVarNums, !IO)
+        hlds_out__write_qualified_functor_with_term_args(ModuleName,
+            term__atom(PredName), HeadTerms, VarSet, AppendVarNums, !IO)
 	).
 
 hlds_out__write_goal(Goal, ModuleInfo, VarSet, AppendVarNums, Indent, Follow,
 		!IO) :-
-		% don't type qualify everything
+        % Don't type qualify everything.
 	hlds_out__write_goal_a(Goal, ModuleInfo, VarSet, AppendVarNums,
 		Indent, Follow, no, !IO).
 
-	% TypeQual is yes(TVarset, VarTypes) if all constructors should
-	% be module qualified.
+    % TypeQual is yes(TVarset, VarTypes) if all constructors should be
+    % module qualified.
+    %
 :- pred hlds_out__write_goal_a(hlds_goal::in, module_info::in, prog_varset::in,
-	bool::in, int::in, string::in, maybe_vartypes::in, io::di, io::uo)
-	is det.
+    bool::in, int::in, string::in, maybe_vartypes::in, io::di, io::uo) is det.
 
 hlds_out__write_goal_a(Goal - GoalInfo, ModuleInfo, VarSet, AppendVarNums,
 		Indent, Follow, TypeQual, !IO) :-
@@ -1320,14 +1291,15 @@
 	),
 	( string__contains_char(Verbose, 'P') ->
 		goal_info_get_goal_path(GoalInfo, Path),
-		( Path \= [] ->
+        (
+            Path = [_ | _],
 			goal_path_to_string(Path, PathStr),
 			hlds_out__write_indent(Indent, !IO),
 			io__write_string("% goal path: ", !IO),
 			io__write_string(PathStr, !IO),
 			io__write_string("\n", !IO)
 		;
-			true
+            Path = []
 		)
 	;
 		true
@@ -1335,14 +1307,14 @@
 	( string__contains_char(Verbose, 'n') ->
 		goal_info_get_nonlocals(GoalInfo, NonLocalsSet),
 		set__to_sorted_list(NonLocalsSet, NonLocalsList),
-		( NonLocalsList \= [] ->
+        (
+            NonLocalsList = [_ | _],
 			hlds_out__write_indent(Indent, !IO),
 			io__write_string("% nonlocals: ", !IO),
-			mercury_output_vars(NonLocalsList, VarSet,
-				AppendVarNums, !IO),
+            mercury_output_vars(NonLocalsList, VarSet, AppendVarNums, !IO),
 			io__write_string("\n", !IO)
 		;
-			true
+            NonLocalsList = []
 		)
 	;
 		true
@@ -1355,8 +1327,7 @@
 		->
 			hlds_out__write_indent(Indent, !IO),
 			io__write_string("% pre-deaths: ", !IO),
-			mercury_output_vars(PreDeathList, VarSet,
-				AppendVarNums, !IO),
+            mercury_output_vars(PreDeathList, VarSet, AppendVarNums, !IO),
 			io__write_string("\n", !IO)
 		;
 			true
@@ -1368,8 +1339,7 @@
 		->
 			hlds_out__write_indent(Indent, !IO),
 			io__write_string("% pre-births: ", !IO),
-			mercury_output_vars(PreBirthList, VarSet,
-				AppendVarNums, !IO),
+            mercury_output_vars(PreBirthList, VarSet, AppendVarNums, !IO),
 			io__write_string("\n", !IO)
 		;
 			true
@@ -1383,8 +1353,7 @@
 			set__to_sorted_list(ProducingVars, ProducingVarsList),
 			hlds_out__write_indent(Indent, !IO),
 			io__write_string("% producing vars: ", !IO),
-			mercury_output_vars(ProducingVarsList, VarSet,
-				AppendVarNums, !IO),
+            mercury_output_vars(ProducingVarsList, VarSet, AppendVarNums, !IO),
 			io__write_string("\n", !IO)
 		;
 			true
@@ -1395,8 +1364,7 @@
 			set__to_sorted_list(ConsumingVars, ConsumingVarsList),
 			hlds_out__write_indent(Indent, !IO),
 			io__write_string("% consuming vars: ", !IO),
-			mercury_output_vars(ConsumingVarsList, VarSet,
-				AppendVarNums, !IO),
+            mercury_output_vars(ConsumingVarsList, VarSet, AppendVarNums, !IO),
 			io__write_string("\n", !IO)
 		;
 			true
@@ -1404,12 +1372,11 @@
 
 		MakeVisibleVars = GoalInfo ^ make_visible_vars,
 		( set__non_empty(MakeVisibleVars) ->
-			set__to_sorted_list(MakeVisibleVars,
-				MakeVisibleVarsList),
+            set__to_sorted_list(MakeVisibleVars, MakeVisibleVarsList),
 			hlds_out__write_indent(Indent, !IO),
 			io__write_string("% make_visible vars: ", !IO),
-			mercury_output_vars(MakeVisibleVarsList, VarSet,
-				AppendVarNums, !IO),
+            mercury_output_vars(MakeVisibleVarsList, VarSet, AppendVarNums,
+                !IO),
 			io__write_string("\n", !IO)
 		;
 			true
@@ -1417,12 +1384,11 @@
 
 		NeedVisibleVars = GoalInfo ^ need_visible_vars,
 		( set__non_empty(NeedVisibleVars) ->
-			set__to_sorted_list(NeedVisibleVars,
-				NeedVisibleVarsList),
+            set__to_sorted_list(NeedVisibleVars, NeedVisibleVarsList),
 			hlds_out__write_indent(Indent, !IO),
 			io__write_string("% need_visible vars: ", !IO),
-			mercury_output_vars(NeedVisibleVarsList, VarSet,
-				AppendVarNums, !IO),
+            mercury_output_vars(NeedVisibleVarsList, VarSet, AppendVarNums,
+                !IO),
 			io__write_string("\n", !IO)
 		;
 			true
@@ -1453,15 +1419,13 @@
 			hlds_out__write_indent(Indent, !IO),
 			( string__contains_char(Verbose, 'D') ->
 				io__write_string("% new insts: ", !IO),
-				hlds_out__write_instmap_delta(InstMapDelta,
-					VarSet, AppendVarNums, Indent, !IO),
+                hlds_out__write_instmap_delta(InstMapDelta, VarSet,
+                    AppendVarNums, Indent, !IO),
 				io__write_string("\n", !IO)
 			;
-				io__write_string("% vars with new insts: ",
-					!IO),
-				hlds_out__write_instmap_delta_vars(
-					InstMapDelta, VarSet, AppendVarNums,
-					!IO),
+                io__write_string("% vars with new insts: ", !IO),
+                hlds_out__write_instmap_delta_vars(InstMapDelta, VarSet,
+                    AppendVarNums, !IO),
 				io__write_string("\n", !IO)
 			)
 		)
@@ -1476,8 +1440,7 @@
 		->
 			hlds_out__write_indent(Indent, !IO),
 			io__write_string("% post-deaths: ", !IO),
-			mercury_output_vars(PostDeathList, VarSet,
-				AppendVarNums, !IO),
+            mercury_output_vars(PostDeathList, VarSet, AppendVarNums, !IO),
 			io__write_string("\n", !IO)
 		;
 			true
@@ -1489,8 +1452,7 @@
 		->
 			hlds_out__write_indent(Indent, !IO),
 			io__write_string("% post-births: ", !IO),
-			mercury_output_vars(PostBirthList, VarSet,
-				AppendVarNums, !IO),
+            mercury_output_vars(PostBirthList, VarSet, AppendVarNums, !IO),
 			io__write_string("\n", !IO)
 		;
 			true
@@ -1503,18 +1465,19 @@
 		CodeGenInfo = no_code_gen_info
 	;
 		CodeGenInfo = llds_code_gen_info(_CodeGenDetails),
-		hlds_out__write_llds_code_gen_info(GoalInfo, VarSet,
-			AppendVarNums, Indent, Verbose, !IO)
+        hlds_out__write_llds_code_gen_info(GoalInfo, VarSet, AppendVarNums,
+            Indent, Verbose, !IO)
 	),
 	( string__contains_char(Verbose, 'g') ->
 		goal_info_get_features(GoalInfo, Features),
-		set__to_sorted_list(Features, Flist),
-		( Flist = [] ->
-			true
+        set__to_sorted_list(Features, FeatureList),
+        (
+            FeatureList = []
 		;
+            FeatureList = [_ | _],
 			hlds_out__write_indent(Indent, !IO),
 			io__write_string("% Goal features:  ", !IO),
-			io__write(Flist, !IO),
+            io__write(FeatureList, !IO),
 			io__write_string("\n", !IO)
 		)
 	;
@@ -1534,12 +1497,14 @@
 	mercury_output_var(Var, VarSet, AppendVarNums, !IO),
 	io__write_string("'\n", !IO),
 	Indent1 = Indent + 1,
-	( CasesList = [Case | Cases] ->
-		hlds_out__write_case(Case, Var, ModuleInfo, VarSet,
-			AppendVarNums, Indent1, TypeQual, !IO),
-		hlds_out__write_cases(Cases, Var, ModuleInfo, VarSet,
-			AppendVarNums, Indent, TypeQual, !IO)
+    (
+        CasesList = [Case | Cases],
+        hlds_out__write_case(Case, Var, ModuleInfo, VarSet, AppendVarNums,
+            Indent1, TypeQual, !IO),
+        hlds_out__write_cases(Cases, Var, ModuleInfo, VarSet, AppendVarNums,
+            Indent, TypeQual, !IO)
 	;
+        CasesList = [],
 		hlds_out__write_indent(Indent1, !IO),
 		io__write_string("fail\n", !IO)
 	),
@@ -1655,24 +1620,24 @@
 
 hlds_out__write_goal_2(conj(List), ModuleInfo, VarSet, AppendVarNums,
 		Indent, Follow, TypeQual, !IO) :-
-	( List = [Goal | Goals] ->
-		globals__io_lookup_string_option(dump_hlds_options, Verbose,
-			!IO),
+    (
+        List = [Goal | Goals],
+        globals__io_lookup_string_option(dump_hlds_options, Verbose, !IO),
 		( Verbose \= "" ->
 			hlds_out__write_indent(Indent, !IO),
 			io__write_string("( % conjunction\n", !IO),
 			hlds_out__write_conj(Goal, Goals, ModuleInfo, VarSet,
-				AppendVarNums, Indent + 1, "\n", Verbose,
-				",\n", TypeQual, !IO),
+                AppendVarNums, Indent + 1, "\n", Verbose, ",\n", TypeQual,
+                !IO),
 			hlds_out__write_indent(Indent, !IO),
 			io__write_string(")", !IO),
 			io__write_string(Follow, !IO)
 		;
 			hlds_out__write_conj(Goal, Goals, ModuleInfo, VarSet,
-				AppendVarNums, Indent, Follow, Verbose, ",\n",
-				TypeQual, !IO)
+                AppendVarNums, Indent, Follow, Verbose, ",\n", TypeQual, !IO)
 		)
 	;
+        List = [],
 		hlds_out__write_indent(Indent, !IO),
 		io__write_string("true", !IO),
 		io__write_string(Follow, !IO)
@@ -1703,8 +1668,8 @@
 		io__write_string("( % disjunction\n", !IO),
 		hlds_out__write_goal_a(Goal, ModuleInfo, VarSet, AppendVarNums,
 			Indent + 1, "\n", TypeQual, !IO),
-		hlds_out__write_goal_list(Goals, ModuleInfo, VarSet,
-			AppendVarNums, Indent, ";\n", TypeQual, !IO),
+        hlds_out__write_goal_list(Goals, ModuleInfo, VarSet, AppendVarNums,
+            Indent, ";\n", TypeQual, !IO),
 		hlds_out__write_indent(Indent, !IO),
 		io__write_string(")", !IO),
 		io__write_string(Follow, !IO)
@@ -1718,14 +1683,12 @@
 		% XXX we should print more info here
 	(
 		GenericCall = higher_order(PredVar, Purity, PredOrFunc, _),
-		globals__io_lookup_string_option(dump_hlds_options, Verbose,
-			!IO),
+        globals__io_lookup_string_option(dump_hlds_options, Verbose, !IO),
 		(
 			PredOrFunc = predicate,
 			( string__contains_char(Verbose, 'l') ->
 				hlds_out__write_indent(Indent, !IO),
-				io__write_string("% higher-order " ++
-					"predicate call\n", !IO)
+                io__write_string("% higher-order predicate call\n", !IO)
 			;
 				true
 			),
@@ -1737,8 +1700,7 @@
 			PredOrFunc = function,
 			( string__contains_char(Verbose, 'l') ->
 				hlds_out__write_indent(Indent, !IO),
-				io__write_string("% higher-order " ++
-					"function application\n", !IO)
+                io__write_string("% higher-order function application\n", !IO)
 			;
 				true
 			),
@@ -1746,18 +1708,15 @@
 				FuncArgVars, FuncRetVar),
 			hlds_out__write_indent(Indent, !IO),
 			write_purity_prefix(Purity, !IO),
-			mercury_output_var(FuncRetVar, VarSet, AppendVarNums,
-				!IO),
+            mercury_output_var(FuncRetVar, VarSet, AppendVarNums, !IO),
 			io__write_string(" = ", !IO),
-			hlds_out__write_functor(term__atom("apply"),
-				FuncArgVars, VarSet, AppendVarNums, !IO)
+            hlds_out__write_functor(term__atom("apply"), FuncArgVars, VarSet,
+                AppendVarNums, !IO)
 		),
 		io__write_string(Follow, !IO)
 	;
-		GenericCall = class_method(TCInfoVar, MethodNum, _ClassId,
-			_MethodId),
-		globals__io_lookup_string_option(dump_hlds_options, Verbose,
-			!IO),
+        GenericCall = class_method(TCInfoVar, MethodNum, _ClassId, _MethodId),
+        globals__io_lookup_string_option(dump_hlds_options, Verbose, !IO),
 		( string__contains_char(Verbose, 'l') ->
 			hlds_out__write_indent(Indent, !IO),
 			io__write_string("% class method call\n", !IO)
@@ -1767,19 +1726,17 @@
 		term__context_init(Context),
 		Functor = term__atom("class_method_call"),
 		TCInfoTerm = term__variable(TCInfoVar),
-		MethodNumTerm = term__functor(term__integer(MethodNum), [],
-			Context),
+        MethodNumTerm = term__functor(term__integer(MethodNum), [], Context),
 		term__var_list_to_term_list(ArgVars, ArgTerms),
-		Term = term__functor(Functor,
-			[TCInfoTerm, MethodNumTerm | ArgTerms], Context),
+        Term = term__functor(Functor, [TCInfoTerm, MethodNumTerm | ArgTerms],
+            Context),
 		hlds_out__write_indent(Indent, !IO),
 		mercury_output_term(Term, VarSet, AppendVarNums, !IO),
 		io__write_string(Follow, !IO)
 	;
 		GenericCall = cast(CastType),
 		CastTypeString = hlds_out__cast_type_to_string(CastType),
-		globals__io_lookup_string_option(dump_hlds_options, Verbose,
-			!IO),
+        globals__io_lookup_string_option(dump_hlds_options, Verbose, !IO),
 		( string__contains_char(Verbose, 'l') ->
 			hlds_out__write_indent(Indent, !IO),
 			io__write_strings(["% ", CastTypeString, "\n"], !IO)
@@ -1830,8 +1787,7 @@
 	),
 	hlds_out__write_indent(Indent, !IO),
 	( PredId = invalid_pred_id ->
-			% If we don't know then the call must be treated
-			% as a predicate.
+            % If we don't know then the call must be treated as a predicate.
 		PredOrFunc = predicate
 	;
 		module_info_pred_info(ModuleInfo, PredId, PredInfo),
@@ -1867,17 +1823,15 @@
 			;
 				VarType = no
 			),
-			CallUnifyContext = call_unify_context(Var,
-				RHS, _UnifyContext),
+            CallUnifyContext = call_unify_context(Var, RHS, _UnifyContext),
 			hlds_out__write_indent(Indent, !IO),
 			io__write_string("% unify context: ", !IO),
 			mercury_output_var(Var, VarSet, AppendVarNums, !IO),
 			io__write_string(" = ", !IO),
 				% XXX Fake the inst varset
 			varset__init(InstVarSet),
-			hlds_out__write_unify_rhs_2(RHS, ModuleInfo, VarSet,
-				InstVarSet, AppendVarNums, Indent, Follow,
-				VarType, TypeQual, !IO)
+            hlds_out__write_unify_rhs_2(RHS, ModuleInfo, VarSet, InstVarSet,
+                AppendVarNums, Indent, Follow, VarType, TypeQual, !IO)
 		;
 			true
 		)
@@ -1896,7 +1850,7 @@
 	;
 		VarType = no
 	),
-		% XXX Fake the inst varset
+        % XXX Fake the inst varset.
 	varset__init(InstVarSet),
 	hlds_out__write_unify_rhs_2(B, ModuleInfo, VarSet, InstVarSet,
 		AppendVarNums, Indent, Follow, VarType, TypeQual, !IO),
@@ -1911,16 +1865,15 @@
 		(
 			% don't output bogus info if we haven't been through
 			% mode analysis yet
-			Unification = complicated_unify(Mode, CanFail,
-				TypeInfoVars),
+            Unification = complicated_unify(Mode, CanFail, TypeInfoVars),
 			CanFail = can_fail,
 			Mode = (free - free -> free - free),
 			TypeInfoVars = []
 		->
 			true
 		;
-			hlds_out__write_unification(Unification, ModuleInfo,
-				VarSet, InstVarSet, AppendVarNums, Indent, !IO)
+            hlds_out__write_unification(Unification, ModuleInfo, VarSet,
+                InstVarSet, AppendVarNums, Indent, !IO)
 		)
 	;
 		true
@@ -1943,13 +1896,11 @@
 	io__write_int(ProcIdInt, !IO),
 	io__write_string(",\n", !IO),
 	hlds_out__write_indent(Indent, !IO),
-	% XXX We don't have the TypeVarSet available here,
-	%     but it's only used for printing out the names of the
-	%     type variables, which isn't essential.
+    % XXX We don't have the TypeVarSet available here, but it is only used
+    % for printing out the names of the type variables, which isn't essential.
 	varset__init(TypeVarSet),
 	io__write_string("[", !IO),
-	hlds_out__write_foreign_args(Args, VarSet, TypeVarSet, AppendVarNums,
-		!IO),
+    hlds_out__write_foreign_args(Args, VarSet, TypeVarSet, AppendVarNums, !IO),
 	io__write_string("],\n", !IO),
 	(
 		ExtraArgs = []
@@ -1967,9 +1918,8 @@
 		io__write_string(C_Code, !IO),
 		io__write_string("""", !IO)
 	;
-		PragmaCode = nondet(Fields, _FieldsContext,
-			First, _FirstContext, Later, _LaterContext,
-			Treat, Shared, _SharedContext),
+        PragmaCode = nondet(Fields, _FieldsContext, First, _FirstContext,
+            Later, _LaterContext, Treat, Shared, _SharedContext),
 		io__write_string("local_vars(""", !IO),
 		io__write_string(Fields, !IO),
 		io__write_string("""), ", !IO),
@@ -2072,8 +2022,8 @@
 			io__write_string("% follow vars: ", !IO),
 			io__write_int(NextReg, !IO),
 			io__write_string("\n", !IO),
-			hlds_out__write_var_to_abs_locns(FVlist, VarSet,
-				AppendVarNums, Indent, !IO)
+            hlds_out__write_var_to_abs_locns(FVlist, VarSet, AppendVarNums,
+                Indent, !IO)
 		;
 			MaybeFollowVars = no
 		)
@@ -2102,8 +2052,7 @@
 				Locs = stack_and_orig,
 				io__write_string("stack and orig ", !IO)
 			),
-			mercury_output_vars(ResumeVarList, VarSet,
-				AppendVarNums, !IO),
+            mercury_output_vars(ResumeVarList, VarSet, AppendVarNums, !IO),
 			io__write_string("\n", !IO)
 		)
 	;
@@ -2117,49 +2066,51 @@
 	->
 		hlds_out__write_indent(Indent, !IO),
 		io__write_string("% store map:\n", !IO),
-		hlds_out__write_var_to_abs_locns(StoreMapList, VarSet,
-			AppendVarNums, Indent, !IO)
+        hlds_out__write_var_to_abs_locns(StoreMapList, VarSet, AppendVarNums,
+            Indent, !IO)
 	;
 		true
 	),
 	(
 		string__contains_char(Verbose, 's'),
-		goal_info_get_maybe_need_across_call(GoalInfo,
-			MaybeNeedAcrossCall),
+        goal_info_get_maybe_need_across_call(GoalInfo, MaybeNeedAcrossCall),
 		MaybeNeedAcrossCall = yes(NeedAcrossCall)
 	->
-		NeedAcrossCall = need_across_call(CallForwardSet,
-			CallResumeSet, CallNondetSet),
+        NeedAcrossCall = need_across_call(CallForwardSet, CallResumeSet,
+            CallNondetSet),
 		set__to_sorted_list(CallForwardSet, CallForwardList),
 		set__to_sorted_list(CallResumeSet, CallResumeList),
 		set__to_sorted_list(CallNondetSet, CallNondetList),
 		hlds_out__write_indent(Indent, !IO),
 		io__write_string("% need across call forward vars: ", !IO),
-		( CallForwardList = [] ->
+        (
+            CallForwardList = [],
 			io__write_string("none\n", !IO)
 		;
-			hlds_out__write_vars(CallForwardList, VarSet,
-				AppendVarNums, !IO),
+            CallForwardList = [_ | _],
+            hlds_out__write_vars(CallForwardList, VarSet, AppendVarNums, !IO),
 			io__write_string("\n", !IO)
 		),
 
 		hlds_out__write_indent(Indent, !IO),
 		io__write_string("% need across call resume vars: ", !IO),
-		( CallResumeList = [] ->
+        (
+            CallResumeList = [],
 			io__write_string("none\n", !IO)
 		;
-			hlds_out__write_vars(CallResumeList, VarSet,
-				AppendVarNums, !IO),
+            CallResumeList = [_ | _],
+            hlds_out__write_vars(CallResumeList, VarSet, AppendVarNums, !IO),
 			io__write_string("\n", !IO)
 		),
 
 		hlds_out__write_indent(Indent, !IO),
 		io__write_string("% need across call nondet vars: ", !IO),
-		( CallNondetList = [] ->
+        (
+            CallNondetList = [],
 			io__write_string("none\n", !IO)
 		;
-			hlds_out__write_vars(CallNondetList, VarSet,
-				AppendVarNums, !IO),
+            CallNondetList = [_ | _],
+            hlds_out__write_vars(CallNondetList, VarSet, AppendVarNums, !IO),
 			io__write_string("\n", !IO)
 		)
 	;
@@ -2167,8 +2118,7 @@
 	),
 	(
 		string__contains_char(Verbose, 's'),
-		goal_info_get_maybe_need_in_resume(GoalInfo,
-			MaybeNeedInResume),
+        goal_info_get_maybe_need_in_resume(GoalInfo, MaybeNeedInResume),
 		MaybeNeedInResume = yes(NeedInResume)
 	->
 		NeedInResume = need_in_resume(ResumeOnStack, ResumeResumeSet,
@@ -2179,30 +2129,30 @@
 		hlds_out__write_indent(Indent, !IO),
 		(
 			ResumeOnStack = yes,
-			io__write_string("% resume point has stack label\n",
-				!IO)
+            io__write_string("% resume point has stack label\n", !IO)
 		;
 			ResumeOnStack = no,
-			io__write_string("% resume point has no stack label\n",
-				!IO)
+            io__write_string("% resume point has no stack label\n", !IO)
 		),
 		hlds_out__write_indent(Indent, !IO),
 		io__write_string("% need in resume resume vars: ", !IO),
-		( ResumeResumeList = [] ->
+        (
+            ResumeResumeList = [],
 			io__write_string("none\n", !IO)
 		;
-			hlds_out__write_vars(ResumeResumeList, VarSet,
-				AppendVarNums, !IO),
+            ResumeResumeList = [_ | _],
+            hlds_out__write_vars(ResumeResumeList, VarSet, AppendVarNums, !IO),
 			io__write_string("\n", !IO)
 		),
 
 		hlds_out__write_indent(Indent, !IO),
 		io__write_string("% need in resume nondet vars: ", !IO),
-		( ResumeNondetList = [] ->
+        (
+            ResumeNondetList = [],
 			io__write_string("none\n", !IO)
 		;
-			hlds_out__write_vars(ResumeNondetList, VarSet,
-				AppendVarNums, !IO),
+            ResumeNondetList = [_ | _],
+            hlds_out__write_vars(ResumeNondetList, VarSet, AppendVarNums, !IO),
 			io__write_string("\n", !IO)
 		)
 	;
@@ -2210,8 +2160,7 @@
 	),
 	(
 		string__contains_char(Verbose, 's'),
-		goal_info_get_maybe_need_in_par_conj(GoalInfo,
-			MaybeNeedInParConj),
+        goal_info_get_maybe_need_in_par_conj(GoalInfo, MaybeNeedInParConj),
 		MaybeNeedInParConj = yes(NeedInParConj)
 	->
 		NeedInParConj = need_in_par_conj(ParConjSet),
@@ -2277,7 +2226,6 @@
 	% make_hlds.m checks the arity so this cannot fail.
 	get_state_args_det(ArgVars, Args, State0Var, StateVar),
 	hlds_out__write_indent(Indent, !IO),
-
 	(
 		InsertDelete = insert,
 		io__write_string("aditi_insert(", !IO)
@@ -2285,18 +2233,17 @@
 		InsertDelete = delete,
 		io__write_string("aditi_delete(", !IO)
 	),
-
-	CallId = PredOrFunc - SymName/_,
+    CallId = PredOrFunc - SymName / _,
 	(
 		PredOrFunc = predicate,
-		hlds_out__write_sym_name_and_args(SymName, Args,
-			VarSet, AppendVarNums, !IO)
+        hlds_out__write_sym_name_and_args(SymName, Args, VarSet,
+            AppendVarNums, !IO)
 	;
 		PredOrFunc = function,
 		pred_args_to_func_args(Args, FuncArgs, RetArg),
 		io__write_string("(", !IO),
-		hlds_out__write_sym_name_and_args(SymName, FuncArgs,
-			VarSet, AppendVarNums, !IO),
+        hlds_out__write_sym_name_and_args(SymName, FuncArgs, VarSet,
+            AppendVarNums, !IO),
 		io__write_string(" = ", !IO),
 		mercury_output_var(RetArg, VarSet, AppendVarNums, !IO),
 		io__write_string(")", !IO)
@@ -2380,9 +2327,8 @@
 	io__write_string("% ", !IO),
 	mercury_output_var(Var, ProgVarSet, AppendVarNums, !IO),
 	io__write_string(" := ", !IO),
-	hlds_out_write_functor_and_submodes(ConsId, ArgVars, ArgModes,
-		ModuleInfo, ProgVarSet, InstVarSet, AppendVarNums, Indent,
-		!IO),
+    hlds_out_write_functor_and_submodes(ConsId, ArgVars, ArgModes, ModuleInfo,
+        ProgVarSet, InstVarSet, AppendVarNums, Indent, !IO),
 	(
 		Uniqueness = cell_is_unique,
 		hlds_out__write_indent(Indent, !IO),
@@ -2402,8 +2348,7 @@
 		;
 			SizeSource = dynamic_size(SizeVar),
 			io__write_string("var ", !IO),
-			mercury_output_var(SizeVar, ProgVarSet, AppendVarNums,
-				!IO),
+            mercury_output_var(SizeVar, ProgVarSet, AppendVarNums, !IO),
 			io__write_string("\n", !IO)
 		)
 	;
@@ -2432,13 +2377,11 @@
 		CanFail = cannot_fail,
 		io__write_string(" => ", !IO)
 	),
-	hlds_out_write_functor_and_submodes(ConsId, ArgVars, ArgModes,
-		ModuleInfo, ProgVarSet, InstVarSet, AppendVarNums, Indent,
-		!IO).
+    hlds_out_write_functor_and_submodes(ConsId, ArgVars, ArgModes, ModuleInfo,
+        ProgVarSet, InstVarSet, AppendVarNums, Indent, !IO).
 
 hlds_out__write_unification(complicated_unify(Mode, CanFail, TypeInfoVars),
-		_ModuleInfo, ProgVarSet, InstVarSet, AppendVarNums, Indent,
-		!IO) :-
+        _ModuleInfo, ProgVarSet, InstVarSet, AppendVarNums, Indent, !IO) :-
 	hlds_out__write_indent(Indent, !IO),
 	io__write_string("% ", !IO),
 	(
@@ -2463,14 +2406,15 @@
 hlds_out_write_functor_and_submodes(ConsId, ArgVars, ArgModes, _ModuleInfo,
 		ProgVarSet, InstVarSet, AppendVarNums, Indent, !IO) :-
 	hlds_out__write_cons_id(ConsId, !IO),
-	( ArgVars = [] ->
+    (
+        ArgVars = [],
 		io__write_string("\n", !IO)
 	;
+        ArgVars = [_ | _],
 		io__write_string(" (", !IO),
 		mercury_output_vars(ArgVars, ProgVarSet, AppendVarNums, !IO),
 		io__write_string(")\n", !IO),
-		globals__io_lookup_string_option(dump_hlds_options, Verbose,
-			!IO),
+        globals__io_lookup_string_option(dump_hlds_options, Verbose, !IO),
 		( string__contains_char(Verbose, 'a') ->
 			hlds_out__write_indent(Indent, !IO),
 			io__write_string("% arg-modes ", !IO),
@@ -2522,8 +2466,7 @@
 		TypeQual = yes(TVarSet, _)
 	->
 		io__write_string(" `with_type` ", !IO),
-		mercury_output_term(Type, TVarSet, no, next_to_graphic_token,
-			!IO)
+        mercury_output_term(Type, TVarSet, no, next_to_graphic_token, !IO)
 	;
 		true
 	).
@@ -2544,12 +2487,14 @@
 		PredOrFunc = predicate,
 		io__write_string("(", !IO),
 		io__write_string(EvalStr, !IO),
-		( Vars = [] ->
+        (
+            Vars = [],
 			io__write_string("(pred)", !IO)
 		;
+            Vars = [_ | _],
 			io__write_string("pred(", !IO),
-			hlds_out__write_var_modes(Vars, Modes, VarSet,
-				InstVarSet, AppendVarNums, !IO),
+            hlds_out__write_var_modes(Vars, Modes, VarSet, InstVarSet,
+                AppendVarNums, !IO),
 			io__write_string(")", !IO)
 		),
 		io__write_string(" is ", !IO),
@@ -2565,17 +2510,19 @@
 		pred_args_to_func_args(Vars, ArgVars, RetVar),
 		io__write_string("(", !IO),
 		io__write_string(EvalStr, !IO),
-		( ArgVars = [] ->
+        (
+            ArgVars = [],
 			io__write_string("(func)", !IO)
 		;
+            ArgVars = [_ | _],
 			io__write_string("func(", !IO),
-			hlds_out__write_var_modes(ArgVars, ArgModes, VarSet,
-				InstVarSet, AppendVarNums, !IO),
+            hlds_out__write_var_modes(ArgVars, ArgModes, VarSet, InstVarSet,
+                AppendVarNums, !IO),
 			io__write_string(")", !IO)
 		),
 		io__write_string(" = (", !IO),
-		hlds_out__write_var_mode(RetVar, RetMode, VarSet,
-			InstVarSet, AppendVarNums, !IO),
+        hlds_out__write_var_mode(RetVar, RetMode, VarSet, InstVarSet,
+            AppendVarNums, !IO),
 		io__write_string(") is ", !IO),
 		mercury_output_det(Det, !IO),
 		io__write_string(" :-\n", !IO),
@@ -2599,8 +2546,7 @@
 		( NonLocals \= [] ->
 			hlds_out__write_indent(Indent1, !IO),
 			io__write_string("% lambda nonlocals: ", !IO),
-			mercury_output_vars(NonLocals, VarSet, AppendVarNums,
-				!IO)
+            mercury_output_vars(NonLocals, VarSet, AppendVarNums, !IO)
 		;
 			true
 		)
@@ -2635,8 +2581,7 @@
 	term__context_init(Context),
 	term__var_list_to_term_list(ArgVars, ArgTerms),
 	Term = term__functor(Functor, ArgTerms, Context),
-	mercury_output_term(Term, VarSet, AppendVarNums, NextToGraphicToken,
-		!IO).
+    mercury_output_term(Term, VarSet, AppendVarNums, NextToGraphicToken, !IO).
 
 :- pred hlds_out__write_qualified_functor(module_name::in, const::in,
 	list(prog_var)::in, prog_varset::in, bool::in, io::di, io::uo) is det.
@@ -2666,27 +2611,25 @@
 		ConsId = cons(SymName, _),
 		(
 			SymName = qualified(Module, Name),
-			hlds_out__write_qualified_functor(Module,
-				term__atom(Name), ArgVars, VarSet,
-				AppendVarNums, !IO)
+            hlds_out__write_qualified_functor(Module, term__atom(Name),
+                ArgVars, VarSet, AppendVarNums, !IO)
 		;
 			SymName = unqualified(Name),
 			hlds_out__write_functor(term__atom(Name),
-				ArgVars, VarSet, AppendVarNums,
-				next_to_graphic_token, !IO)
+                ArgVars, VarSet, AppendVarNums, next_to_graphic_token, !IO)
 		)
 	;
 		ConsId = int_const(Int),
-		hlds_out__write_functor(term__integer(Int), ArgVars,
-			VarSet, AppendVarNums, !IO)
+        hlds_out__write_functor(term__integer(Int), ArgVars, VarSet,
+            AppendVarNums, !IO)
 	;
 		ConsId = float_const(Float),
-		hlds_out__write_functor(term__float(Float), ArgVars,
-			VarSet, AppendVarNums, !IO)
+        hlds_out__write_functor(term__float(Float), ArgVars, VarSet,
+            AppendVarNums, !IO)
 	;
 		ConsId = string_const(Str),
-		hlds_out__write_functor(term__string(Str), ArgVars,
-			VarSet, AppendVarNums, !IO)
+        hlds_out__write_functor(term__string(Str), ArgVars, VarSet,
+            AppendVarNums, !IO)
 	;
 		ConsId = pred_const(ShroudedPredProcId, _),
 		proc(PredId, _) = unshroud_pred_proc_id(ShroudedPredProcId),
@@ -2694,8 +2637,7 @@
 		PredModule = pred_info_module(PredInfo),
 		PredName = pred_info_name(PredInfo),
 		hlds_out__write_functor_cons_id(
-			cons(qualified(PredModule, PredName),
-				list__length(ArgVars)),
+            cons(qualified(PredModule, PredName), list__length(ArgVars)),
 			ArgVars, VarSet, ModuleInfo, AppendVarNums, !IO)
 	;
 		ConsId = type_ctor_info_const(Module, Name, Arity),
@@ -2721,20 +2663,15 @@
 		io__write_string(")", !IO)
 	;
 		ConsId = type_info_cell_constructor(_),
-		hlds_out__write_functor(
-			term__atom("type_info_cell_constructor"),
-			ArgVars, VarSet, AppendVarNums, next_to_graphic_token,
-			!IO)
+        hlds_out__write_functor(term__atom("type_info_cell_constructor"),
+            ArgVars, VarSet, AppendVarNums, next_to_graphic_token, !IO)
 	;
 		ConsId = typeclass_info_cell_constructor,
-		hlds_out__write_functor(
-			term__atom("typeclass_info_cell_constructor"),
-			ArgVars, VarSet, AppendVarNums, next_to_graphic_token,
-			!IO)
+        hlds_out__write_functor(term__atom("typeclass_info_cell_constructor"),
+            ArgVars, VarSet, AppendVarNums, next_to_graphic_token, !IO)
 	;
 		ConsId = tabling_pointer_const(ShroudedPredProcId),
-		proc(PredId, ProcId) =
-			unshroud_pred_proc_id(ShroudedPredProcId),
+        proc(PredId, ProcId) = unshroud_pred_proc_id(ShroudedPredProcId),
 		io__write_string("tabling_pointer_const(", !IO),
 		hlds_out__write_pred_id(ModuleInfo, PredId, !IO),
 		io__write_string(", ", !IO),
@@ -2743,8 +2680,7 @@
 		io__write_string(")", !IO)
 	;
 		ConsId = deep_profiling_proc_layout(ShroudedPredProcId),
-		proc(PredId, ProcId) =
-			unshroud_pred_proc_id(ShroudedPredProcId),
+        proc(PredId, ProcId) = unshroud_pred_proc_id(ShroudedPredProcId),
 		io__write_string("deep_profiling_proc_layout(", !IO),
 		hlds_out__write_pred_id(ModuleInfo, PredId, !IO),
 		proc_id_to_int(ProcId, ProcIdInt),
@@ -2753,8 +2689,7 @@
 		io__write_string("))", !IO)
 	;
 		ConsId = table_io_decl(ShroudedPredProcId),
-		proc(PredId, ProcId) =
-			unshroud_pred_proc_id(ShroudedPredProcId),
+        proc(PredId, ProcId) = unshroud_pred_proc_id(ShroudedPredProcId),
 		io__write_string("table_io_decl(", !IO),
 		hlds_out__write_pred_id(ModuleInfo, PredId, !IO),
 		proc_id_to_int(ProcId, ProcIdInt),
@@ -2764,21 +2699,21 @@
 	).
 
 hlds_out__write_var_modes([], [], _, _, _, !IO).
-hlds_out__write_var_modes([Var|Vars], [Mode|Modes], VarSet, InstVarSet,
+hlds_out__write_var_modes([Var | Vars], [Mode | Modes], VarSet, InstVarSet,
 		AppendVarNums, !IO) :-
 	hlds_out__write_var_mode(Var, Mode, VarSet, InstVarSet, AppendVarNums,
 		!IO),
-	( Vars \= [] ->
+    (
+        Vars = [_ | _],
 		io__write_string(", ", !IO)
 	;
-		true
+        Vars = []
 	),
 	hlds_out__write_var_modes(Vars, Modes, VarSet, InstVarSet,
 		AppendVarNums, !IO).
-
-hlds_out__write_var_modes([], [_|_], _, _, _, !IO) :-
+hlds_out__write_var_modes([], [_ | _], _, _, _, !IO) :-
 	error("hlds_out__write_var_modes: length mis-match").
-hlds_out__write_var_modes([_|_], [], _, _, _, !IO) :-
+hlds_out__write_var_modes([_ | _], [], _, _, _, !IO) :-
 	error("hlds_out__write_var_modes: length mis-match").
 
 :- pred hlds_out__write_var_mode(prog_var::in, (mode)::in, prog_varset::in,
@@ -2803,22 +2738,20 @@
 			% since that way it visually separates
 			% the lines after one goal
 			% and the lines before the next
-			hlds_out__write_goal_a(Goal1, ModuleInfo, VarSet,
-				AppendVarNums, Indent, "\n", TypeQual, !IO),
+            hlds_out__write_goal_a(Goal1, ModuleInfo, VarSet, AppendVarNums,
+                Indent, "\n", TypeQual, !IO),
 			hlds_out__write_indent(Indent, !IO),
 			io__write_string(Separator, !IO)
 		;
-			hlds_out__write_goal_a(Goal1, ModuleInfo, VarSet,
-				AppendVarNums, Indent, Separator, TypeQual,
-				!IO)
+            hlds_out__write_goal_a(Goal1, ModuleInfo, VarSet, AppendVarNums,
+                Indent, Separator, TypeQual, !IO)
 		),
-		hlds_out__write_conj(Goal2, Goals2, ModuleInfo, VarSet,
-			AppendVarNums, Indent, Follow, Verbose, Separator,
-			TypeQual, !IO)
+        hlds_out__write_conj(Goal2, Goals2, ModuleInfo, VarSet, AppendVarNums,
+            Indent, Follow, Verbose, Separator, TypeQual, !IO)
 	;
 		Goals1 = [],
-		hlds_out__write_goal_a(Goal1, ModuleInfo, VarSet,
-			AppendVarNums, Indent, Follow, TypeQual, !IO)
+        hlds_out__write_goal_a(Goal1, ModuleInfo, VarSet, AppendVarNums,
+            Indent, Follow, TypeQual, !IO)
 	).
 
 hlds_out__write_goal_list(GoalList, ModuleInfo, VarSet, AppendVarNums, Indent,
@@ -2876,8 +2809,7 @@
 :- pred hlds_out__write_some(list(prog_var)::in, prog_varset::in,
 	io::di, io::uo) is det.
 
-	% quantification is all implicit by the time we get to the hlds.
-
+    % Quantification is all implicit by the time we get to the hlds.
 hlds_out__write_some(_Vars, _VarSet, !IO).
 
 hlds_out__write_instmap(InstMap, VarSet, AppendVarNums, Indent, !IO) :-
@@ -2885,8 +2817,8 @@
 		io__write_string("unreachable", !IO)
 	;
 		instmap__to_assoc_list(InstMap, AssocList),
-		hlds_out__write_instmap_2(AssocList, VarSet, AppendVarNums,
-			Indent, !IO)
+        hlds_out__write_instmap_2(AssocList, VarSet, AppendVarNums, Indent,
+            !IO)
 	).
 
 :- pred hlds_out__write_instmap_2(assoc_list(prog_var, inst)::in,
@@ -2899,13 +2831,13 @@
 	io__write_string(" -> ", !IO),
 	varset__init(InstVarSet),
 	mercury_output_inst(Inst, InstVarSet, !IO),
-	( Rest = [] ->
-		true
+    (
+        Rest = []
 	;
+        Rest = [_ | _],
 		mercury_output_newline(Indent, !IO),
 		io__write_string("%            ", !IO),
-		hlds_out__write_instmap_2(Rest, VarSet, AppendVarNums, Indent,
-			!IO)
+        hlds_out__write_instmap_2(Rest, VarSet, AppendVarNums, Indent, !IO)
 	).
 
 :- pred hlds_out__write_instmap_delta(instmap_delta::in, prog_varset::in,
@@ -2917,8 +2849,8 @@
 		io__write_string("unreachable", !IO)
 	;
 		instmap_delta_to_assoc_list(InstMapDelta, AssocList),
-		hlds_out__write_instmap_2(AssocList, VarSet, AppendVarNums,
-			Indent, !IO)
+        hlds_out__write_instmap_2(AssocList, VarSet, AppendVarNums, Indent,
+            !IO)
 	).
 
 :- pred hlds_out__write_instmap_delta_vars(instmap_delta::in, prog_varset::in,
@@ -2969,8 +2901,7 @@
 	io::di, io::uo) is det.
 
 hlds_out__write_type_list(Types, TypeVarSet, AppendVarNums, !IO) :-
-	list__foldl(output_term_and_comma(TypeVarSet, AppendVarNums),
-		Types, !IO).
+    list__foldl(output_term_and_comma(TypeVarSet, AppendVarNums), Types, !IO).
 
 :- pred output_term_and_comma(tvarset::in, bool::in, (type)::in,
 	io::di, io::uo) is det.
@@ -3063,8 +2994,7 @@
 	io__write_string("\n", !IO).
 
 :- pred write_typeclass_info_var(int::in, bool::in, rtti_varmaps::in,
-	prog_varset::in, tvarset::in, prog_constraint::in, io::di, io::uo)
-	is det.
+    prog_varset::in, tvarset::in, prog_constraint::in, io::di, io::uo) is det.
 
 write_typeclass_info_var(Indent, AppendVarNums, RttiVarMaps, VarSet, TVarSet,
 		Constraint, !IO) :-
@@ -3287,12 +3217,12 @@
 	hlds_out__write_indent(Indent, !IO),
 	io__write_string(";\t", !IO),
 	hlds_out__write_ctor(C, TVarSet, TagValues, !IO),
-	( Cs = [] ->
-		true
+    (
+        Cs = []
 	;
+        Cs = [_ | _],
 		io__write_string("\n", !IO),
-		hlds_out__write_constructors_2(Indent, TVarSet, Cs, TagValues,
-			!IO)
+        hlds_out__write_constructors_2(Indent, TVarSet, Cs, TagValues, !IO)
 	).
 
 :- pred hlds_out__write_ctor(constructor::in, tvarset::in,
@@ -3318,8 +3248,8 @@
 	hlds_out__write_indent(Indent, !IO),
 	io__write_string("%-------- Classes --------\n", !IO),
 	map__to_assoc_list(ClassTable, ClassTableList),
-	io__write_list(ClassTableList, "\n",
-		hlds_out__write_class_defn(Indent), !IO),
+    io__write_list(ClassTableList, "\n", hlds_out__write_class_defn(Indent),
+        !IO),
 	io__nl(!IO).
 
 :- pred hlds_out__write_class_defn(int::in,
@@ -3481,8 +3411,7 @@
 
 hlds_out__write_instance_defn(Indent, InstanceDefn, !IO) :-
 	InstanceDefn = hlds_instance_defn(_InstanceModule, _Status,
-		Context, Constraints, Types, Body,
-		MaybePredProcIds, VarSet, Proofs),
+        Context, Constraints, Types, Body, MaybePredProcIds, VarSet, Proofs),
 
 	term__context_file(Context, FileName),
 	term__context_line(Context, LineNumber),
@@ -3540,9 +3469,8 @@
 	;
 		MaybePredProcIds = no
 	),
-
-	hlds_out__write_constraint_proofs(Indent, VarSet, Proofs,
-		AppendVarNums, !IO),
+    hlds_out__write_constraint_proofs(Indent, VarSet, Proofs, AppendVarNums,
+        !IO),
 	io__nl(!IO).
 
 %-----------------------------------------------------------------------------%
@@ -3719,13 +3647,11 @@
 			io__write_string("TopCSD is ", !IO),
 			mercury_output_var(TopCSD, VarSet, AppendVarNums, !IO),
 			io__write_string(", MiddleCSD is ", !IO),
-			mercury_output_var(MiddleCSD, VarSet, AppendVarNums,
-				!IO),
+            mercury_output_var(MiddleCSD, VarSet, AppendVarNums, !IO),
 			(
 				MaybeOldOutermost = yes(OldOutermost),
 				io__write_string(", OldOutermost is ", !IO),
-				mercury_output_var(OldOutermost, VarSet,
-					AppendVarNums, !IO)
+                mercury_output_var(OldOutermost, VarSet, AppendVarNums, !IO)
 			;
 				MaybeOldOutermost = no
 			),
@@ -3739,8 +3665,8 @@
 
 	(
 		MaybeUntupleInfo = yes(UntupleInfo),
-		hlds_out__write_untuple_info(UntupleInfo, VarSet,
-			AppendVarNums, Indent, !IO)
+        hlds_out__write_untuple_info(UntupleInfo, VarSet, AppendVarNums,
+            Indent, !IO)
 	;
 		MaybeUntupleInfo = no
 	),
@@ -3751,16 +3677,13 @@
 	varset__init(ModeVarSet),
 	(
 		PredOrFunc = predicate,
-		mercury_output_pred_mode_decl(ModeVarSet,
-			unqualified(PredName), HeadModes,
-			DeclaredDeterminism, ModeContext, !IO)
+        mercury_output_pred_mode_decl(ModeVarSet, unqualified(PredName),
+            HeadModes, DeclaredDeterminism, ModeContext, !IO)
 	;
 		PredOrFunc = function,
-		pred_args_to_func_args(HeadModes, FuncHeadModes,
-			RetHeadMode),
-		mercury_output_func_mode_decl(ModeVarSet,
-			unqualified(PredName), FuncHeadModes, RetHeadMode,
-			DeclaredDeterminism, ModeContext, !IO)
+        pred_args_to_func_args(HeadModes, FuncHeadModes, RetHeadMode),
+        mercury_output_func_mode_decl(ModeVarSet, unqualified(PredName),
+            FuncHeadModes, RetHeadMode, DeclaredDeterminism, ModeContext, !IO)
 	),
 
 	(
@@ -3793,12 +3716,12 @@
 	;
 		proc_info_stack_slots(Proc, StackSlots),
 		hlds_out__write_indent(Indent, !IO),
-		hlds_out__write_stack_slots(Indent, StackSlots, VarSet,
-			AppendVarNums, !IO),
+        hlds_out__write_stack_slots(Indent, StackSlots, VarSet, AppendVarNums,
+            !IO),
 		hlds_out__write_indent(Indent, !IO),
 		term__var_list_to_term_list(HeadVars, HeadTerms),
-		hlds_out__write_clause_head(ModuleInfo, PredId, VarSet,
-			AppendVarNums, HeadTerms, PredOrFunc, !IO),
+        hlds_out__write_clause_head(ModuleInfo, PredId, VarSet, AppendVarNums,
+            HeadTerms, PredOrFunc, !IO),
 		io__write_string(" :-\n", !IO),
 		hlds_out__write_goal(Goal, ModuleInfo, VarSet, AppendVarNums,
 			Indent1, ".\n", !IO)
@@ -3874,8 +3797,7 @@
 	io__write_string("% Proofs: \n", !IO),
 	map__to_assoc_list(Proofs, ProofsList),
 	io__write_list(ProofsList, "\n",
-		hlds_out__write_constraint_proof(Indent,
-			VarSet, AppendVarNums), !IO).
+        hlds_out__write_constraint_proof(Indent, VarSet, AppendVarNums), !IO).
 
 :- pred hlds_out__write_constraint_proof(int::in, tvarset::in, bool::in,
 	pair(prog_constraint, constraint_proof)::in, io::di, io::uo) is det.
@@ -3950,23 +3872,19 @@
 
 mode_to_term(Context, (InstA -> InstB)) = Term :-
 	(
-		%
-		% check for higher-order pred or func modes, and output them
-		% in a nice format
-		%
+        % Check for higher-order pred or func modes, and output them
+        % in a nice format.
 		InstA = ground(_Uniq, higher_order(_)),
 		InstB = InstA
 	->
 		Term = inst_to_term(InstA, Context)
 	;
 		construct_qualified_term(unqualified(">>"),
-			[inst_to_term(InstA, Context),
-			inst_to_term(InstB, Context)],
+            [inst_to_term(InstA, Context), inst_to_term(InstB, Context)],
 			Context, Term)
 	).
 mode_to_term(Context, user_defined_mode(Name, Args)) = Term :-
-	construct_qualified_term(Name,
-		list__map(map_inst_to_term(Context), Args),
+    construct_qualified_term(Name, list__map(map_inst_to_term(Context), Args),
 		Context, Term).
 
 :- func make_atom(string, prog_context) = prog_term.
@@ -3995,7 +3913,7 @@
 	(
 		GroundInstInfo = higher_order(pred_inst_info(PredOrFunc,
 			Modes, Det)),
-		/* XXX we ignore Uniq */
+        % XXX we ignore Uniq
 		(
 			PredOrFunc = predicate,
 			construct_qualified_term(unqualified("pred"),
@@ -4022,8 +3940,7 @@
 inst_to_term(constrained_inst_vars(Vars, Inst), Context) =
 	set__fold(func(Var, Term) =
 			term__functor(term__atom("=<"),
-				[term__coerce(term__variable(Var)), Term],
-				Context),
+                [term__coerce(term__variable(Var)), Term], Context),
 		Vars, inst_to_term(Inst, Context)).
 inst_to_term(abstract_inst(Name, Args), Context) =
 	inst_name_to_term(user_inst(Name, Args), Context).
@@ -4112,8 +4029,7 @@
 		;
 			BoundInsts = [_ | _],
 			construct_qualified_term(unqualified(";"),
-				[FirstTerm,
-				bound_insts_to_term(BoundInsts, Context)],
+                [FirstTerm, bound_insts_to_term(BoundInsts, Context)],
 				Context, Term)
 		)
 	;
@@ -4194,15 +4110,13 @@
 	( set__member(InstName, ExpandedInstInfo ^ eii_expansions) ->
 		add_string("...", !S)
 	; InstName = user_inst(_, _) ->
-		% don't expand user-defined insts, just output them as is
+        % Don't expand user-defined insts, just output them as is
 		% (we do expand any compiler-defined insts that occur
-		% in the arguments of the user-defined inst, however)
+        % in the arguments of the user-defined inst, however).
 		mercury_format_inst_name(InstName, ExpandedInstInfo, !S)
 	;
-		inst_lookup(ExpandedInstInfo ^ eii_module_info, InstName,
-			Inst),
-		set__insert(ExpandedInstInfo ^ eii_expansions, InstName,
-			Expansions),
+        inst_lookup(ExpandedInstInfo ^ eii_module_info, InstName, Inst),
+        set__insert(ExpandedInstInfo ^ eii_expansions, InstName, Expansions),
 		mercury_format_inst(Inst,
 			ExpandedInstInfo ^ eii_expansions := Expansions, !S)
 	).
@@ -4215,8 +4129,7 @@
 mercury_expanded_inst_to_string(Inst, VarSet, ModuleInfo) = String :-
 	set__init(Expansions),
 	mercury_format_inst(Inst,
-		expanded_inst_info(VarSet, ModuleInfo, Expansions),
-		"", String).
+        expanded_inst_info(VarSet, ModuleInfo, Expansions), "", String).
 
 %-----------------------------------------------------------------------------%
 %-----------------------------------------------------------------------------%
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