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SmallEiffel.lha
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writable_attribute.e
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1998-12-22
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-- This file is part of SmallEiffel The GNU Eiffel Compiler.
-- Copyright (C) 1994-98 LORIA - UHP - CRIN - INRIA - FRANCE
-- Dominique COLNET and Suzanne COLLIN - colnet@loria.fr
-- http://www.loria.fr/SmallEiffel
-- SmallEiffel is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the Free
-- Software Foundation; either version 2, or (at your option) any later
-- version. SmallEiffel is distributed in the hope that it will be useful,but
-- WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details. You should have received a copy of the GNU General
-- Public License along with SmallEiffel; see the file COPYING. If not,
-- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-- Boston, MA 02111-1307, USA.
--
class WRITABLE_ATTRIBUTE
--
-- For instance variables (ordinary attribute).
--
inherit ATTRIBUTE;
creation make
feature
isa_redefinition: BOOLEAN;
-- Is it a redefinition of a previously define attribute ?
feature {NONE}
make(n: like names; t: like result_type) is
require
n /= Void;
t /= Void
do
make_e_feature(n);
result_type := t;
ensure
names = n;
result_type = t
end;
feature {BASE_CLASS}
set_isa_redefinition is
do
isa_redefinition := true;
end;
feature
to_run_feature(t: TYPE; fn: FEATURE_NAME): RUN_FEATURE_2 is
do
!!Result.make(t,fn,Current);
end;
feature {C_PRETTY_PRINTER}
stupid_switch(up_rf: RUN_FEATURE; r: ARRAY[RUN_CLASS]): BOOLEAN is
local
offset1, offset2, i: INTEGER;
dyn_rf2: RUN_FEATURE_2;
dyn_rc: RUN_CLASS;
t: TYPE;
do
from
i := r.upper;
dyn_rc := r.item(i);
dyn_rf2 ?= dyn_rc.dynamic(up_rf);
if dyn_rf2 /= Void then
Result := true;
t := dyn_rf2.result_type;
if t.is_native_array then
t := t.generic_list.first;
Result := t.is_reference;
end;
offset1 := dyn_rc.offset_of(dyn_rf2);
i := i - 1;
end;
until
not Result or else i = 0
loop
dyn_rc := r.item(i);
dyn_rf2 ?= dyn_rc.dynamic(up_rf);
if dyn_rf2 /= Void then
offset2 := dyn_rc.offset_of(dyn_rf2);
Result := offset1 = offset2;
i := i - 1;
else
Result := false;
end;
end;
end;
feature {NONE}
pretty_tail is
do
end;
end -- WRITABLE_ATTRIBUTE