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Contents of /branches/CAT_mono/Src/Eiffel/eiffel/genericity/cl_type_i.e

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Revision 1204 - (show annotations)
Wed Oct 5 00:16:03 1994 UTC (25 years, 5 months ago) by grator
Original Path: trunk/Src/bench/Eiffel/eiffel/genericity/cl_type_i.e
File size: 4382 byte(s)
array optimization

1 -- Type class
2
3 class CL_TYPE_I
4
5 inherit
6
7 TYPE_I
8 redefine
9 is_reference,
10 is_expanded,
11 is_valid,
12 same_as,
13 c_type,
14 instantiation_in,
15 conforms_to_array
16 end
17
18 feature
19
20 base_id: INTEGER;
21 -- Base class id of the type class
22
23 is_expanded: BOOLEAN;
24 -- Is the type expanded ?
25
26 set_base_id (c: INTEGER) is
27 -- Assign `c' to `base_id'.
28 do
29 base_id := c;
30 end;
31
32 set_is_expanded (b: BOOLEAN) is
33 -- Assign `b' to `is_expanded'.
34 do
35 is_expanded := b;
36 end;
37
38 meta_generic: META_GENERIC is
39 -- Meta generic array describing the type class
40 do
41 -- No meta generic in non-generic type
42 end;
43
44 base_class: CLASS_C is
45 -- Base class associated to the class type
46 do
47 Result := System.class_of_id (base_id);
48 end;
49
50 is_valid: BOOLEAN is
51 -- Is the base class still in the system ?
52 do
53 Result := base_class /= Void;
54 end;
55
56 is_reference: BOOLEAN is
57 -- Is the type a reference type ?
58 do
59 Result := not is_expanded;
60 end;
61
62 same_as (other: TYPE_I): BOOLEAN is
63 -- Is `other' equal to Current ?
64 local
65 other_cl_type: CL_TYPE_I;
66 do
67 other_cl_type ?= other;
68 Result := other_cl_type /= Void
69 and then
70 other_cl_type.base_id = base_id
71 and then
72 other_cl_type.is_expanded = is_expanded
73 and then
74 other_cl_type.meta_generic = Void
75 end;
76
77 instantiation_in (other: GEN_TYPE_I): CL_TYPE_I is
78 -- Instantiation of Current in context of `other'
79 require else
80 True
81 do
82 Result := Current;
83 end;
84
85 description: ATTR_DESC is
86 -- Type description for skeletons
87 local
88 exp: EXPANDED_DESC;
89 types: TYPE_LIST;
90 pos: INTEGER;
91 do
92 if is_expanded then
93 !!exp;
94 is_expanded := False;
95
96 types := base_class.types;
97 pos := types.index;
98 types.compare_references
99 types.search (Current);
100 exp.set_class_type (types.item);
101 types.go_i_th (pos);
102
103 is_expanded := True;
104 Result := exp;
105 else
106 Result := c_type.description;
107 end;
108 end;
109
110 c_type: TYPE_C is
111 -- Associated C type
112 do
113 Result := Reference_c_type;
114 end;
115
116 append_clickable_signature (a_clickable: CLICK_WINDOW) is
117 do
118 if is_expanded then
119 a_clickable.put_string ("expanded ");
120 end;
121 base_class.append_clickable_signature (a_clickable)
122 end;
123
124 dump (file: FILE) is
125 do
126 if is_expanded then
127 file.putstring ("expanded ");
128 end;
129 file.putstring (base_class.class_name);
130 end;
131
132 associated_class_type: CLASS_TYPE is
133 -- Associated class type
134 local
135 types: TYPE_LIST;
136 pos: INTEGER;
137 do
138 if is_expanded then
139 Result := associated_expanded_class_type
140 else
141 types := base_class.types;
142 pos := types.index;
143 types.compare_references
144 types.search (Current);
145 Result := types.item;
146 types.go_i_th (pos);
147 end;
148 end;
149
150 associated_expanded_class_type: CLASS_TYPE is
151 -- Associated expanded class type
152 require
153 is_expanded: is_expanded
154 do
155 is_expanded := false;
156 Result := associated_class_type;
157 is_expanded := true;
158 end;
159
160 type_id: INTEGER is
161 -- Type id of the correponding class type
162 do
163 Result := associated_class_type.type_id;
164 end;
165
166 expanded_type_id: INTEGER is
167 -- Type id of the corresponding expanded class type
168 do
169 Result := associated_expanded_class_type.type_id
170 end;
171
172 generate_cecil_value (file: INDENT_FILE) is
173 -- Generate cecil value
174 do
175 if not is_expanded then
176 file.putstring ("SK_DTYPE");
177 else
178 file.putstring ("SK_EXP + (uint32) ");
179 file.putint (base_id);
180 end;
181 end;
182
183 hash_code: INTEGER is
184 -- Hash code for current type
185 do
186 Result := Other_code + base_id;
187 end;
188
189 sk_value: INTEGER is
190 -- Generate SK value associated to the current type.
191 do
192 if not is_expanded then
193 Result := Sk_ref + (type_id - 1);
194 else
195 is_expanded := False;
196 Result := Sk_exp + (type_id - 1);
197 is_expanded := True;
198 end;
199 end;
200
201 cecil_value: INTEGER is
202 do
203 if not is_expanded then
204 Result := Sk_dtype
205 else
206 Result := Sk_exp + base_id
207 end;
208 end;
209
210 feature -- Array optimization
211
212 conforms_to_array: BOOLEAN is
213 do
214 Result := base_class.conform_to (array_class_c)
215 end;
216
217 feature {NONE} -- Array optimization
218
219 array_class_c: CLASS_C is
220 once
221 Result := System.array_class.compiled_class
222 end;
223
224 feature
225
226 type_a: CL_TYPE_A is
227 do
228 !!Result
229 Result.set_is_expanded (is_expanded);
230 Result.set_base_type (base_id)
231 end
232
233 end

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