[m-rev.] diff: fix mantis bug 227

Zoltan Somogyi zs at csse.unimelb.edu.au
Mon Nov 14 17:01:12 AEDT 2011


Fix Mantis bug 227.

compiler/det_report.m:
	When looking for violations of require_detism scopes, look inside
	lambda goals.

tests/invalid/require_det_in_lambda.{m,err_exp}:
	New test case for this bug.

tests/invalid/Mmakefile:
	Enable the new test case.

Zoltan.

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Index: compiler/det_report.m
===================================================================
RCS file: /home/mercury/mercury1/repository/mercury/compiler/det_report.m,v
retrieving revision 1.158
diff -u -b -r1.158 det_report.m
--- compiler/det_report.m	19 Oct 2011 01:08:28 -0000	1.158
+++ compiler/det_report.m	12 Nov 2011 14:20:03 -0000
@@ -1058,9 +1058,23 @@
             unexpected($module, $pred, "bi_implication")
         )
     ;
+        GoalExpr = unify(_, RHS, _, _, _),
+        (
+            ( RHS = rhs_var(_)
+            ; RHS = rhs_functor(_, _, _)
+            )
+        ;
+            RHS = rhs_lambda_goal(_Purity, _Groundness, _PorF, _EvalMethod,
+                _LambdaNonLocals, Vars, Modes, _Detism, LambdaGoal),
+            assoc_list.from_corresponding_lists(Vars, Modes, VarsModes),
+            det_info_get_module_info(!.DetInfo, ModuleInfo),
+            lambda_update_instmap(VarsModes, ModuleInfo,
+                InstMap0, LambdaInstMap0),
+            reqscope_check_goal(LambdaGoal, LambdaInstMap0, !DetInfo)
+        )
+    ;
         ( GoalExpr = plain_call(_, _, _, _, _, _)
         ; GoalExpr = generic_call(_, _, _, _)
-        ; GoalExpr = unify(_, _, _, _, _)
         ; GoalExpr = call_foreign_proc(_, _, _, _, _, _, _)
         )
     ).
@@ -1195,6 +1209,17 @@
 
 %-----------------------------------------------------------------------------%
 
+:- pred lambda_update_instmap(assoc_list(prog_var, mer_mode)::in,
+    module_info::in, instmap::in, instmap::out) is det.
+
+lambda_update_instmap([], _ModuleInfo, !InstMap).
+lambda_update_instmap([Var - Mode | VarsModes], ModuleInfo, !InstMap) :-
+    mode_get_insts(ModuleInfo, Mode, InitInst, _FinalInst),
+    instmap_set_var(Var, InitInst, !InstMap),
+    lambda_update_instmap(VarsModes, ModuleInfo, !InstMap).
+
+%-----------------------------------------------------------------------------%
+
 :- pred find_missing_cons_ids(det_info::in, instmap::in, prog_var::in,
     list(case)::in, string::out, maybe(list(format_component))::out) is det.
 
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Index: tests/invalid/Mmakefile
===================================================================
RCS file: /home/mercury/mercury1/repository/tests/invalid/Mmakefile,v
retrieving revision 1.247
diff -u -b -r1.247 Mmakefile
--- tests/invalid/Mmakefile	5 Jul 2011 03:34:38 -0000	1.247
+++ tests/invalid/Mmakefile	12 Nov 2011 14:22:45 -0000
@@ -180,6 +180,7 @@
 	quant_constraint_2 \
 	range_restrict \
 	record_syntax_errors \
+	require_det_in_lambda \
 	require_scopes \
 	some \
 	specified \
Index: tests/invalid/require_det_in_lambda.err_exp
===================================================================
RCS file: tests/invalid/require_det_in_lambda.err_exp
diff -N tests/invalid/require_det_in_lambda.err_exp
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ tests/invalid/require_det_in_lambda.err_exp	12 Nov 2011 14:22:07 -0000
@@ -0,0 +1,2 @@
+require_det_in_lambda.m:017: Error: required determinism is `det', but actual
+require_det_in_lambda.m:017:   determinism is `semidet'.
Index: tests/invalid/require_det_in_lambda.m
===================================================================
RCS file: tests/invalid/require_det_in_lambda.m
diff -N tests/invalid/require_det_in_lambda.m
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ tests/invalid/require_det_in_lambda.m	12 Nov 2011 14:08:38 -0000
@@ -0,0 +1,33 @@
+% vim: ts=4 sw=4 et ft=mercury
+
+:- module require_det_in_lambda.
+:- interface.
+
+:- import_module io.
+
+:- pred main(io::di, io::uo) is det.
+
+:- implementation.
+:- import_module int.
+
+main(!IO) :-
+    % The compiler was incorrectly simplifying this to `F = bar' in the erlang
+    % grade.
+    T = (pred(X::in, Y::out) is semidet :-
+        require_det (
+            X < 10,
+            Y = X + 1
+        )
+    ),
+    test(T, 5, !IO).
+
+:- pred test((pred(int, int))::in(pred(in, out) is semidet), int::in,
+    io::di, io::uo) is det.
+
+test(T, A, !IO) :-
+    ( T(A, B) ->
+        io.write_int(B, !IO),
+        io.nl(!IO)
+    ;
+        io.write_string("test failed\n", !IO)
+    ).
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