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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 E_VOID
- --
- -- Handling of the Eiffel `Void'.
- --
-
- inherit
- NAME;
- EXPRESSION
- redefine is_void
- end;
-
- creation make, implicit
-
- feature
-
- start_position: POSITION;
-
- feature
-
- is_static, is_void, is_pre_computable, can_be_dropped: BOOLEAN is true;
-
- use_current: BOOLEAN is false;
-
- isa_dca_inline_argument: INTEGER is -1;
-
- feature {NONE}
-
- make(sp: like start_position) is
- require
- sp /= Void
- do
- start_position := sp;
- to_string := us_void;
- ensure
- sp /= Void
- end;
-
- implicit is
- do
- to_string := us_void;
- end;
-
- feature
-
- to_key: STRING is
- do
- Result := to_string;
- end;
-
- dca_inline_argument(formal_arg_type: TYPE) is
- do
- mapping_c_arg(formal_arg_type);
- end;
-
- frozen mapping_c_target(target_type: TYPE) is
- do
- end;
-
- frozen mapping_c_arg(formal_arg_type: TYPE) is
- do
- compile_to_c;
- end;
-
- short is
- do
- short_print.hook_or(us_void,us_void);
- end;
-
- short_target is
- do
- short;
- short_print.a_dot;
- end;
-
- compile_to_c is
- do
- cpp.put_string("NULL");
- end;
-
- compile_to_c_old is
- do
- end;
-
- compile_to_jvm_old is
- do
- end;
-
- compile_target_to_jvm, compile_to_jvm is
- do
- code_attribute.opcode_aconst_null;
- end;
-
- compile_to_jvm_assignment(a: ASSIGNMENT) is
- do
- end;
-
- jvm_branch_if_false: INTEGER is
- do
- end;
-
- jvm_branch_if_true: INTEGER is
- do
- end;
-
- compile_to_jvm_into(dest: TYPE): INTEGER is
- do
- Result := 1;
- compile_to_jvm;
- end;
-
- result_type: TYPE_NONE is
- once
- !!Result.make(Void);
- end;
-
- to_runnable(ct: TYPE): like Current is
- do
- if current_type = Void then
- current_type := ct;
- Result := Current;
- else
- Result := twin;
- Result.set_current_type(ct);
- end;
- end;
-
- print_as_target is
- do
- fatal_error("Internal Error #1 in E_VOID.");
- end;
-
- precedence: INTEGER is
- do
- Result := atomic_precedence;
- end;
-
- feature {CREATION_CALL,EXPRESSION_WITH_COMMENT}
-
- jvm_assign is
- do
- end;
-
- end -- E_VOID
-
-