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Revision 552 - (hide annotations)
Wed May 11 11:14:08 1994 UTC (25 years, 9 months ago) by grator
Original Path: trunk/Src/bench/Eiffel/eiffel/genericity/cl_type_i.e
File size: 3923 byte(s)
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1 grator 18 -- Type class
2    
3     class CL_TYPE_I
4    
5     inherit
6    
7     TYPE_I
8     redefine
9     is_reference,
10     is_expanded,
11 grator 236 is_valid,
12 grator 18 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 grator 236 is_valid: BOOLEAN is
50     -- Is the base class still in the system ?
51     do
52     Result := base_class /= Void;
53     end;
54    
55 grator 18 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 grator 282 require else
79     True
80 grator 18 do
81     Result := Current;
82     end;
83    
84     description: ATTR_DESC is
85     -- Type description for skeletons
86     local
87     exp: EXPANDED_DESC;
88 grator 485 types: TYPE_LIST;
89     pos: INTEGER;
90     do
91 grator 18 if is_expanded then
92     !!exp;
93     is_expanded := False;
94    
95 grator 485 types := base_class.types;
96 grator 541 pos := types.index;
97 grator 485 types.search (Current);
98 grator 18 exp.set_class_type (types.item);
99 grator 541 types.go_i_th (pos);
100 grator 18
101     is_expanded := True;
102     Result := exp;
103     else
104     Result := c_type.description;
105     end;
106     end;
107    
108     c_type: TYPE_C is
109     -- Associated C type
110     do
111     Result := Reference_c_type;
112     end;
113    
114 grator 552 append_clickable_signature (a_clickable: CLICK_WINDOW) is
115     do
116     if is_expanded then
117     a_clickable.put_string ("expanded ");
118     end;
119     base_class.append_clickable_signature (a_clickable)
120     end;
121    
122 grator 18 dump (file: UNIX_FILE) is
123     do
124     if is_expanded then
125     file.putstring ("expanded ");
126     end;
127     file.putstring (base_class.class_name);
128     end;
129    
130     associated_class_type: CLASS_TYPE is
131     -- Associated class type
132     local
133 grator 485 types: TYPE_LIST;
134     pos: INTEGER;
135     do
136     if is_expanded then
137     Result := associated_expanded_class_type
138     else
139     types := base_class.types;
140 grator 541 pos := types.index;
141 grator 485 types.search (Current);
142     Result := types.item;
143 grator 541 types.go_i_th (pos);
144 grator 485 end;
145     end;
146 grator 18
147     associated_expanded_class_type: CLASS_TYPE is
148     -- Associated expanded class type
149     require
150     is_expanded: is_expanded
151     do
152     is_expanded := false;
153 grator 485 Result := associated_class_type;
154     is_expanded := true;
155 grator 18 end;
156    
157     type_id: INTEGER is
158     -- Type id of the correponding class type
159     do
160     Result := associated_class_type.type_id;
161     end;
162    
163     expanded_type_id: INTEGER is
164     -- Type id of the corresponding expanded class type
165     do
166     Result := associated_expanded_class_type.type_id
167     end;
168    
169     generate_cecil_value (file: UNIX_FILE) is
170     -- Generate cecil value
171     do
172     if not is_expanded then
173     file.putstring ("SK_DTYPE");
174     else
175     file.putstring ("SK_EXP + (uint32) ");
176     file.putint (base_id);
177     end;
178     end;
179    
180     hash_code: INTEGER is
181     -- Hash code for current type
182     do
183     Result := Other_code + base_id;
184     end;
185    
186     sk_value: INTEGER is
187     -- Generate SK value associated to the current type.
188     do
189     if not is_expanded then
190     Result := Sk_ref + (type_id - 1);
191     else
192     is_expanded := False;
193     Result := Sk_exp + (type_id - 1);
194     is_expanded := True;
195     end;
196     end;
197    
198 grator 508 cecil_value: INTEGER is
199     do
200     if not is_expanded then
201     Result := Sk_dtype
202     else
203     Result := Sk_exp + base_id
204     end;
205     end;
206    
207 grator 18 end

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