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Aminet 30
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Aminet 30 (1999)(Schatztruhe)[!][Apr 1999].iso
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SmallEiffel.lha
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SmallEiffel
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lib_std
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double_ref.e
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1998-12-22
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-- This file is free software, which comes along with SmallEiffel. This
-- software 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. You can modify it as you want, provided
-- this header is kept unaltered, and a notification of the changes is added.
-- You are allowed to redistribute it and sell it, alone or as a part of
-- another product.
-- Copyright (C) 1994-98 LORIA - UHP - CRIN - INRIA - FRANCE
-- Dominique COLNET and Suzanne COLLIN - colnet@loria.fr
-- http://www.loria.fr/SmallEiffel
--
class DOUBLE_REF
inherit
HASHABLE;
NUMERIC
undefine out_in_tagged_out_memory, fill_tagged_out_memory
redefine
infix "^", prefix "+", prefix "-"
end;
COMPARABLE
redefine
compare, out_in_tagged_out_memory, fill_tagged_out_memory
end;
creation make
feature
item: DOUBLE;
make(value: DOUBLE) is
do
item := value
end;
feature
set_item(value: like item) is
do
item := value;
end;
infix "+" (other: like Current): like Current is
do
!!Result.make (item + other.item)
end;
infix "-" (other: like Current): like Current is
do
!!Result.make (item - other.item);
end;
infix "*" (other: like Current): like Current is
do
!!Result.make (item * other.item)
end;
infix "/" (other: like Current): like Current is
do
!!Result.make (item / other.item)
end;
infix "^" (exp: INTEGER): like Current is
do
!!Result.make (item ^ exp)
end;
prefix "+" : like Current is
do
!!Result.make (item)
end;
prefix "-" : like Current is
do
!!Result.make (-item);
end;
infix "<" (other: like Current): BOOLEAN is
do
Result := item < other.item
end;
compare (other: like Current): INTEGER is
do
Result := item.compare (other.item)
end;
divisible (other: like Current): BOOLEAN is
do
Result := (other.item /= 0.0)
end;
one: like Current is
do
!!Result.make (1.0)
end;
zero: like Current is
do
!!Result.make (0.0)
end;
out_in_tagged_out_memory, fill_tagged_out_memory is
do
tagged_out_memory.append("item: ");
item.fill_tagged_out_memory;
end;
hash_code: INTEGER is
do
Result := item.hash_code;
end;
end -- DOUBLE_REF