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

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Revision 236 - (show annotations)
Tue Jun 8 12:09:28 1993 UTC (26 years, 8 months ago) by grator
Original Path: trunk/Src/bench/Eiffel/eiffel/genericity/cl_type_i.e
File size: 3780 byte(s)
*** empty log message ***

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 end
16
17 feature
18
19 base_id: INTEGER;
20 -- Base class id of the type class
21
22 is_expanded: BOOLEAN;
23 -- Is the type expanded ?
24
25 set_base_id (c: INTEGER) is
26 -- Assign `c' to `base_id'.
27 do
28 base_id := c;
29 end;
30
31 set_is_expanded (b: BOOLEAN) is
32 -- Assign `b' to `is_expanded'.
33 do
34 is_expanded := b;
35 end;
36
37 meta_generic: META_GENERIC is
38 -- Meta generic array describing the type class
39 do
40 -- No meta generic in non-generic type
41 end;
42
43 base_class: CLASS_C is
44 -- Base class associated to the class type
45 do
46 Result := System.class_of_id (base_id);
47 end;
48
49 is_valid: BOOLEAN is
50 -- Is the base class still in the system ?
51 do
52 Result := base_class /= Void;
53 end;
54
55 is_reference: BOOLEAN is
56 -- Is the type a reference type ?
57 do
58 Result := not is_expanded;
59 end;
60
61 same_as (other: TYPE_I): BOOLEAN is
62 -- Is `other' equal to Current ?
63 local
64 other_cl_type: CL_TYPE_I;
65 do
66 other_cl_type ?= other;
67 Result := other_cl_type /= Void
68 and then
69 other_cl_type.meta_generic = Void
70 and then
71 other_cl_type.base_id = base_id
72 and then
73 other_cl_type.is_expanded = is_expanded;
74 end;
75
76 instantiation_in (other: GEN_TYPE_I): CL_TYPE_I is
77 -- Instantiation of Current in context of `other'
78 do
79 Result := Current;
80 end;
81
82 description: ATTR_DESC is
83 -- Type description for skeletons
84 local
85 exp: EXPANDED_DESC;
86 types: TYPE_LIST;
87 pos: INTEGER;
88 do
89 if is_expanded then
90 !!exp;
91 is_expanded := False;
92
93 types := base_class.types;
94 pos := types.position;
95 types.search (Current);
96 exp.set_class_type (types.item);
97 types.go (pos);
98
99 is_expanded := True;
100 Result := exp;
101 else
102 Result := c_type.description;
103 end;
104 end;
105
106 c_type: TYPE_C is
107 -- Associated C type
108 do
109 Result := Reference_c_type;
110 end;
111
112 dump (file: UNIX_FILE) is
113 do
114 if is_expanded then
115 file.putstring ("expanded ");
116 end;
117 file.putstring (base_class.class_name);
118 end;
119
120 associated_class_type: CLASS_TYPE is
121 -- Associated class type
122 local
123 types: TYPE_LIST;
124 pos: INTEGER;
125 do
126 if is_expanded then
127 Result := associated_expanded_class_type
128 else
129 types := base_class.types;
130 pos := types.position;
131 types.search (Current);
132 Result := types.item;
133 types.go (pos);
134 end;
135 end;
136
137 associated_expanded_class_type: CLASS_TYPE is
138 -- Associated expanded class type
139 require
140 is_expanded: is_expanded
141 do
142 is_expanded := false;
143 Result := associated_class_type;
144 is_expanded := true;
145 end;
146
147 type_id: INTEGER is
148 -- Type id of the correponding class type
149 do
150 Result := associated_class_type.type_id;
151 end;
152
153 expanded_type_id: INTEGER is
154 -- Type id of the corresponding expanded class type
155 do
156 Result := associated_expanded_class_type.type_id
157 end;
158
159 generate_cecil_value (file: UNIX_FILE) is
160 -- Generate cecil value
161 do
162 if not is_expanded then
163 file.putstring ("SK_DTYPE");
164 else
165 file.putstring ("SK_EXP + (uint32) ");
166 file.putint (base_id);
167 end;
168 end;
169
170 hash_code: INTEGER is
171 -- Hash code for current type
172 do
173 Result := Other_code + base_id;
174 end;
175
176 sk_value: INTEGER is
177 -- Generate SK value associated to the current type.
178 do
179 if not is_expanded then
180 Result := Sk_ref + (type_id - 1);
181 else
182 is_expanded := False;
183 Result := Sk_exp + (type_id - 1);
184 is_expanded := True;
185 end;
186 end;
187
188 end

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