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external_routine.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.
--
deferred class EXTERNAL_ROUTINE
--
-- For routines implemented with a call to a foreign language.
-- Root of EXTERNAL_PROCEDURE and EXTERNAL_FUNCTION.
--
inherit ROUTINE;
feature
native: NATIVE;
alias_string: STRING;
feature
is_deferred: BOOLEAN is false;
feature {NONE}
make_external_routine(n: like native; desc: STRING) is
require
n /= void
do
native := n;
alias_string := desc;
end;
feature
frozen set_rescue_compound(c: COMPOUND) is
do
if c /= Void then
eh.add_position(c.start_position);
else
eh.add_position(start_position);
end;
eh.append("External feature must not have rescue compound.");
eh.print_as_fatal_error;
end;
frozen use_current: BOOLEAN is
do
Result := native.use_current(Current);
end;
external_c_name: STRING is
do
if alias_string = Void then
Result := first_name.to_string;
else
Result := alias_string;
end;
end;
feature {C_PRETTY_PRINTER}
frozen stupid_switch(up_rf: RUN_FEATURE; r: ARRAY[RUN_CLASS]): BOOLEAN is
do
Result := native.stupid_switch(first_name.to_string);
if Result then
cpp.put_comment("SSER");
end;
end;
feature {NONE}
pretty_print_routine_body is
do
fmt.keyword("external");
native.pretty_print;
if not external_c_name.is_equal(first_name.to_string) or else
names.count > 1 then
fmt.indent;
fmt.keyword("alias");
fmt.put_character('%"');
fmt.put_string(external_c_name);
fmt.put_character('%"');
end;
end;
pretty_print_rescue is
do
end;
end -- EXTERNAL_ROUTINE