/[eiffelstudio]/branches/eth/eve/Src/Eiffel/API/evaluated_type/none_a.e
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Revision 92684 - (hide annotations)
Fri Jun 7 15:28:53 2013 UTC (6 years, 7 months ago) by jasonw
File size: 4188 byte(s)
<<Merged from trunk#92682.>>
1 manus 76432 note
2 manus 27398 description: "Actual type for NONE."
3 manus 56535 legal: "See notice at end of class."
4     status: "See notice at end of class."
5 manus 9656 date: "$Date$"
6 manus 27398 revision: "$Revision$"
7 dinov 3375
8 manus 9656 class
9     NONE_A
10 grator 18
11     inherit
12 jasonw 89347 DEANCHORED_TYPE_A
13 grator 18 redefine
14 manus 72419 is_none, dump, c_type, same_as, is_full_named_type, generated_id,
15 manus 74866 generate_gen_type_il
16 grator 18 end
17    
18 manus 57234 feature -- Visitor
19    
20 manus 76432 process (v: TYPE_A_VISITOR)
21 manus 57234 -- Process current element.
22     do
23     v.process_none_a (Current)
24     end
25    
26 manus 9656 feature -- Comparison
27    
28 manus 76432 is_equivalent (other: like Current): BOOLEAN
29 manus 9656 -- Is `other' equivalent to the current object ?
30     do
31     Result := True
32     end
33    
34 dinov 3078 feature -- Properties
35 grator 18
36 manus 76432 is_none: BOOLEAN = True
37 grator 18 -- Is the current type a none type ?
38    
39 manus 76432 is_full_named_type: BOOLEAN = True
40 manus 44539 -- Current is a full named type.
41    
42 dinov 3180 feature -- Access
43    
44 manus 76432 hash_code: INTEGER
45 manus 72419 -- Hash code for current type
46     do
47     Result := {SHARED_HASH_CODE}.none_code
48     end
49    
50 manus 76432 same_as (other: TYPE_A): BOOLEAN
51 dinov 3180 -- Is the current type the same as `other' ?
52     do
53 jasonw 83524 if other.is_valid then
54     Result := other.is_none
55     end
56 manus 9656 end
57 dinov 3180
58 jasonw 89347 base_class: CLASS_C
59 manus 11302 do
60     -- No associated class
61     end
62    
63 dinov 3078 feature -- Output
64    
65 manus 76432 dump: STRING = "NONE"
66 grator 18 -- Dumped trace
67    
68 jasonw 92516 ext_append_to (a_text_formatter: TEXT_FORMATTER; a_context_class: CLASS_C)
69     -- <Precursor>
70 grator 296 do
71 jasonw 92516 ext_append_marks (a_text_formatter)
72     a_text_formatter.add ({SHARED_TEXT_ITEMS}.ti_none_class)
73 manus 9656 end
74 grator 296
75 manus 72419 feature -- Generic conformance
76    
77 manus 76432 generated_id (final_mode: BOOLEAN; a_context_type: TYPE_A): NATURAL_16
78 manus 72419 -- Id of a `like xxx'.
79     do
80 jasonw 88881 Result := {SHARED_GEN_CONF_LEVEL}.detachable_none_type
81 manus 72419 end
82    
83     feature -- IL code generation
84    
85 manus 76432 generate_gen_type_il (il_generator: IL_CODE_GENERATOR; use_info: BOOLEAN)
86 manus 72419 -- `use_info' is true iff we generate code for a
87     -- creation instruction.
88     do
89     il_generator.generate_none_type_instance
90     end
91    
92 dinov 3180 feature {COMPILER_EXPORTER}
93 dinov 3078
94 manus 76432 create_info: CREATE_TYPE
95 manus 9656 -- Byte code information for entity type creation
96     do
97 manus 75567 create Result.make (as_attachment_mark_free)
98 manus 9656 end
99    
100 manus 76432 c_type: REFERENCE_I
101 grator 18 -- Void C type
102 manus 72419 do
103     Result := reference_c_type
104 manus 9656 end
105 grator 18
106 jasonw 92434 conform_to (a_context_class: CLASS_C; other: INHERITANCE_TYPE_A): BOOLEAN
107 manus 41740 -- Does Current conform to `other'?
108 grator 18 do
109 jasonw 87220 -- Apply the same conformance rules as for a class type.
110     if
111 jasonw 89347 attached {ANNOTATED_TYPE_A} other.conformance_type as other_attachable_type and then
112 jasonw 87220 not other_attachable_type.is_expanded and then
113     (other_attachable_type.is_formal implies other_attachable_type.is_reference)
114     then
115     Result := True
116     if a_context_class.lace_class.is_void_safe_conformance then
117     Result :=
118     is_attachable_to (other_attachable_type) and then
119     (other_attachable_type.is_formal implies
120     (other_attachable_type.has_detachable_mark or else is_implicitly_attached))
121     end
122     if Result then
123     Result := is_processor_attachable_to (other)
124     end
125     end
126 manus 9656 end
127 grator 18
128 manus 76432 note
129 jasonw 92434 copyright: "Copyright (c) 1984-2013, Eiffel Software"
130 manus 58027 license: "GPL version 2 (see http://www.eiffel.com/licensing/gpl.txt)"
131 manus 56535 licensing_options: "http://www.eiffel.com/licensing"
132     copying: "[
133     This file is part of Eiffel Software's Eiffel Development Environment.
134 manus 58027
135 manus 56535 Eiffel Software's Eiffel Development Environment is free
136     software; you can redistribute it and/or modify it under
137     the terms of the GNU General Public License as published
138     by the Free Software Foundation, version 2 of the License
139     (available at the URL listed under "license" above).
140 manus 58027
141 manus 56535 Eiffel Software's Eiffel Development Environment is
142 jasonw 83524 distributed in the hope that it will be useful, but
143 manus 56535 WITHOUT ANY WARRANTY; without even the implied warranty
144     of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
145 jasonw 83524 See the GNU General Public License for more details.
146 manus 58027
147 manus 56535 You should have received a copy of the GNU General Public
148     License along with Eiffel Software's Eiffel Development
149     Environment; if not, write to the Free Software Foundation,
150 jasonw 83524 Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
151 manus 56535 ]"
152     source: "[
153 jasonw 83524 Eiffel Software
154     5949 Hollister Ave., Goleta, CA 93117 USA
155     Telephone 805-685-1006, Fax 805-685-6869
156     Website http://www.eiffel.com
157     Customer support http://support.eiffel.com
158 manus 56535 ]"
159    
160 dinov 3375 end -- class NONE_A

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