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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 WHEN_ITEM_2
- --
- -- To store a slice value of a when clause in an inspect instruction.
- --
- -- Exemple :
- -- inspect ...
- -- when foo .. bar, then ...
- --
-
- inherit WHEN_ITEM;
-
- creation {E_WHEN,WHEN_ITEM_2}
- make
-
- feature {ANY}
-
- lower, upper: EXPRESSION;
-
- lower_value, upper_value: INTEGER;
-
- feature {NONE}
-
- make(l, u: EXPRESSION) is
- require
- l /= Void;
- u /= Void
- do
- lower := l;
- upper := u;
- ensure
- lower = l;
- upper = u
- end;
-
- feature {ANY}
-
- start_position: POSITION is
- do
- Result := lower.start_position;
- end;
-
- feature {E_WHEN,WHEN_ITEM_2}
-
- to_runnable_integer(ew: like e_when): like Current is
- local
- v: like lower;
- do
- if e_when = Void then
- e_when := ew;
- v := lower.to_runnable(current_type);
- if v /= Void and then v.result_type.is_integer then
- lower := v;
- lower_value := lower.to_integer;
- else
- error(lower.start_position,fz_biv);
- end;
- v := upper.to_runnable(current_type);
- if v /= Void and then v.result_type.is_integer then
- upper := v;
- upper_value := upper.to_integer;
- else
- error(upper.start_position,fz_biv);
- end;
- e_when.add_when_item_2(Current);
- Result := Current;
- else
- !!Result.make(lower,upper);
- Result := Result.to_runnable_integer(ew);
- end;
- end;
-
- to_runnable_character(ew: like e_when): like Current is
- local
- v: like lower;
- do
- if e_when = Void then
- e_when := ew;
- v := lower.to_runnable(current_type);
- if v /= Void and then v.result_type.is_character then
- lower := v;
- lower_value := lower.to_integer;
- else
- error(lower.start_position,fz_bcv);
- end;
- v := upper.to_runnable(current_type);
- if v /= Void and then v.result_type.is_character then
- upper := v;
- upper_value := upper.to_integer;
- else
- error(upper.start_position,fz_bcv);
- end;
- e_when.add_when_item_2(Current);
- Result := Current;
- else
- !!Result.make(lower,upper);
- Result := Result.to_runnable_character(ew);
- end;
- end;
-
- pretty_print is
- do
- lower.pretty_print;
- fmt.put_string("..");
- upper.pretty_print;
- end;
-
- feature {E_WHEN}
-
- eval(exp: INTEGER): BOOLEAN is
- do
- Result := (lower_value <= exp) and (exp <= upper_value);
- end;
-
- end -- WHEN_ITEM_2
-
-