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formal_generic_list.e
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1999-06-05
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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://SmallEiffel.loria.fr
-- 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 FORMAL_GENERIC_LIST
--
-- To store the list of formal generic arguments of (a generic) class.
--
inherit GLOBALS;
creation make
feature
start_position: POSITION;
-- Of first "[".
feature {NONE}
list: ARRAY[FORMAL_GENERIC_ARG];
feature
make(sp: like start_position; l: like list) is
require
sp /= Void;
l /= Void;
not l.empty;
l.lower = 1;
local
rank, i: INTEGER;
fga: FORMAL_GENERIC_ARG;
do
start_position := sp;
list := l;
from
i := l.upper;
until
i = 0
loop
fga := l.item(i);
check
fga /= Void;
end;
rank := index_of(fga.name);
if rank /= i then
eh.add_position(l.item(rank).start_position);
eh.add_position(fga.start_position);
fatal_error("Formal generic name appears twice in %
%formal generic list (VCFG.2).");
end;
i := i - 1;
end;
ensure
start_position = sp;
list = l;
end;
count: INTEGER is
do
Result := list.upper;
end;
item(i: INTEGER): FORMAL_GENERIC_ARG is
require
1 <= i;
i <= count;
do
Result := list.item(i);
ensure
Result /= Void;
end;
pretty_print is
local
i: INTEGER;
do
fmt.put_character('[');
fmt.level_incr;
from
i := 1;
until
i > list.upper
loop
list.item(i).pretty_print;
i := i + 1;
if i <= list.upper then
fmt.put_string(",");
end;
end;
fmt.put_character(']');
fmt.level_decr;
ensure
fmt.indent_level = old fmt.indent_level;
end;
short is
local
i: INTEGER;
do
short_print.hook_or("open_sb","[");
from
i := 1;
until
i > list.upper
loop
list.item(i).short;
i := i + 1;
if i <= list.upper then
short_print.hook_or("fgl_sep",",");
end;
end;
short_print.hook_or("close_sb","]");
end;
feature {FORMAL_GENERIC_ARG}
index_of(n: CLASS_NAME): INTEGER is
-- Index of `n' or 0 when not found.
require
n /= Void
local
to_string: STRING;
do
from
to_string := n.to_string;
Result := list.upper;
until
Result = 0 or else
to_string = list.item(Result).name.to_string
loop
Result := Result - 1;
end;
ensure
0 <= Result;
Result <= list.upper;
end;
feature {BASE_CLASS}
check_generic_formal_arguments is
local
i: INTEGER;
do
from
i := list.upper;
until
i = 0
loop
list.item(i).check_generic_formal_arguments;
i := i - 1;
end;
end;
invariant
list.lower = 1;
not list.empty;
end -- FORMAL_GENERIC_LIST