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abstract_result.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 ABSTRACT_RESULT
--
-- Handling of the pseudo variable `Result'.
-- Common root of ONCE_RESULT and ORDINARY_RESULT.
--
inherit EXPRESSION;
feature
start_position: POSITION;
feature
make(sp: like start_position) is
require
sp /= Void
do
start_position := sp;
ensure
start_position = sp
end;
feature
is_result: BOOLEAN is true;
is_writable: BOOLEAN is true;
is_current: BOOLEAN is false;
is_manifest_string: BOOLEAN is false;
is_void: BOOLEAN is false;
is_static: BOOLEAN is false;
is_pre_computable: BOOLEAN is false;
isa_dca_inline_argument: INTEGER is 0;
can_be_dropped: BOOLEAN is true;
c_simple: BOOLEAN is true;
use_current: BOOLEAN is false;
feature
result_type: TYPE is
deferred
end;
frozen to_string, frozen to_key: STRING is
do
Result := as_result;
end;
frozen static_result_base_class: BASE_CLASS is
local
rf: RUN_FEATURE;
e_feature: E_FEATURE;
rt: TYPE;
bcn: CLASS_NAME;
do
rf := small_eiffel.top_rf;
e_feature := rf.base_feature;
rt := e_feature.result_type;
bcn := rt.static_base_class_name;
if bcn /= Void then
Result := bcn.base_class;
end;
end;
frozen static_value: INTEGER is
do
end;
frozen assertion_check(tag: CHARACTER) is
do
end;
frozen afd_check is
do
end;
frozen dca_inline_argument(formal_arg_type: TYPE) is
do
end;
frozen bracketed_pretty_print, frozen pretty_print is
do
fmt.put_string(as_result);
end;
frozen print_as_target is
do
fmt.put_string(as_result);
fmt.put_character('.');
end;
frozen short is
do
short_print.hook_or(as_result,as_result);
end;
frozen short_target is
do
short;
short_print.a_dot;
end;
frozen mapping_c_target(target_type: TYPE) is
local
flag: BOOLEAN;
rt: like result_type;
do
flag := cpp.call_invariant_start(target_type);
rt := result_type.run_type;
if rt.is_reference then
if target_type.is_reference then
-- Reference into Reference :
cpp.put_string(fz_b7);
cpp.put_integer(target_type.id);
cpp.put_string(fz_b8);
compile_to_c;
cpp.put_character(')');
else
-- Reference into Expanded :
rt.to_expanded;
cpp.put_character('(');
compile_to_c;
cpp.put_character(')');
end;
else
if target_type.is_reference then
-- Expanded into Reference :
rt.to_reference;
cpp.put_character('(');
compile_to_c;
cpp.put_character(')');
else
-- Expanded into Expanded :
if rt.need_c_struct then
cpp.put_character('&');
end;
compile_to_c;
end;
end;
if flag then
cpp.call_invariant_end;
end;
end;
frozen mapping_c_arg(formal_arg_type: TYPE) is
local
rt: like result_type;
do
rt := result_type.run_type;
if rt.is_reference then
if formal_arg_type.is_reference then
-- Reference into Reference :
compile_to_c;
else
-- Reference into Expanded :
rt.to_expanded;
cpp.put_character('(');
compile_to_c;
cpp.put_character(')');
end;
else
if formal_arg_type.is_reference then
-- Expanded into Reference :
rt.to_reference;
cpp.put_character('(');
compile_to_c;
cpp.put_character(')');
else
-- Expanded into Expanded :
if rt.need_c_struct then
cpp.put_character('&');
end;
compile_to_c;
end;
end;
end;
frozen collect_c_tmp is
do
end;
frozen c_declare_for_old is
do
end;
frozen compile_to_c_old is
do
end;
frozen compile_to_jvm_old is
do
end;
frozen compile_target_to_jvm is
do
standard_compile_target_to_jvm;
end;
frozen jvm_branch_if_false: INTEGER is
do
compile_to_jvm;
Result := code_attribute.opcode_ifeq;
end;
frozen jvm_branch_if_true: INTEGER is
do
compile_to_jvm;
Result := code_attribute.opcode_ifne;
end;
frozen compile_to_jvm_into(dest: TYPE): INTEGER is
do
Result := standard_compile_to_jvm_into(dest);
end;
frozen precedence: INTEGER is
do
Result := atomic_precedence;
end;
invariant
start_position /= Void
end -- ABSTRACT_RESULT