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41 lines
1.0 KiB
Mathematica
41 lines
1.0 KiB
Mathematica
%---------------------------------------------------------------------------%
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% vim: ts=4 sw=4 et ft=mercury
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%---------------------------------------------------------------------------%
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%
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% Regression test.
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%
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% Description of bug:
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% The liveness of polymorphic type variables for accurate gc
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% wasn't being computed correctly in the case of if-then-else.
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%
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% Symptom(s) of bug:
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% A sanity check in liveness.m is failed.
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%
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% Software error: branches of if-then-else disagree on liveness
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% Then: HeadVar__3 TypeInfo_for_Y
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% Else: HeadVar__3 TypeInfo_for_X TypeInfo_for_Y
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%
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%
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% Date bug existed: 19-June-1997
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% Author: trd
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:- module agc_ite.
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:- interface.
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:- import_module list.
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:- pred filter_map(pred(X, Y)::in(pred(in, out) is semidet),
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list(X)::in, list(Y)::out) is det.
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:- implementation.
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filter_map(_, [], []).
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filter_map(Pred, [Head0 | Tail0], List) :-
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( if call(Pred, Head0, Head) then
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List = [Head | List1]
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else
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List = List1
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),
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agc_ite.filter_map(Pred, Tail0, List1).
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