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1.1 paf 1: /*
2: Parser
3: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.2 ! paf 4: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
1.1 paf 5:
1.2 ! paf 6: $Id: pa_vmframe.h,v 1.1 2001/03/11 07:52:45 paf Exp $
1.1 paf 7: */
8:
9: #ifndef PA_VMFRAME_H
10: #define PA_VMFRAME_H
11:
12: #include "pa_wcontext.h"
13: #include "pa_vunknown.h"
14: #include "pa_vjunction.h"
15:
16: class VMethodFrame : public WContext {
17: public: // Value
18:
19: // all: for error reporting after fail(), etc
20: const char *type() const { return "method_frame"; }
21: // frame: my or self_transparent
22: Value *get_element(const String& name) {
23: if(my) {
24: Value *result=static_cast<Value *>(my->get(name));
25: if(result)
26: return result;
27: }
28: return fself->get_element(name);
29: }
30: // frame: my or self_transparent
31: void put_element(const String& name, Value *value){
32: if(!(my && my->put_replace(name, value)))
33: fself->put_element(name, value);
34: }
35:
36: // frame: self_transparent
37: VClass* get_class() { return fself->get_class(); }
38:
39: // methodframe: self_transparent
40: VAliased *get_aliased() { return fself->get_aliased(); }
41:
42: public: // usage
43:
44: VMethodFrame(Pool& apool, const Junction& ajunction/*info: always method-junction*/) :
45: WContext(apool, 0 /* empty */, false /* not constructing */),
46:
47: junction(ajunction),
48: store_param_index(0),
49: my(0), fnumbered_params(0),
50: fself(0) {
51:
52: Method &method=*junction.method;
53:
54: if(method.max_numbered_params_count) // are this method params numbered?
55: fnumbered_params=NEW Array(pool()); // create storage
56: else // named params
57: my=NEW Hash(pool()); // create storage
58:
59: if(method.locals_names) { // there are any local var names?
60: // remember them
61: // those are flags that name is local == to be looked up in 'my'
62: for(int i=0; i<method.locals_names->size(); i++) {
63: Value *value=NEW VUnknown(pool());
64: String& name=*static_cast<String *>(method.locals_names->get(i));
65: my->put(name, value);
66: value->set_name(name);
67: }
68: }
69: }
70:
71: void set_self(Value& aself) { fself=&aself; }
72:
73: void store_param(Value *value) {
74: Method& method=*junction.method;
75: int max_params=
76: method.max_numbered_params_count?method.max_numbered_params_count:
77: method.params_names?method.params_names->size():
78: 0;
79: if(store_param_index==max_params)
80: THROW(0,0,
81: &junction.self.name(),
82: "(%s) method '%s' accepts maximum %d parameter(s)",
83: junction.self.type(),
84: method.name.cstr(),
85: max_params);
86:
87: if(method.max_numbered_params_count) { // are this method params numbered?
88: *fnumbered_params+=value;
89: } else { // named param
90: String& name=*static_cast<String *>(
91: method.params_names->get(store_param_index++));
92: my->put(name, value); // remember param
93: value->set_name(name); // set param's 'name'
94: }
95: }
96: void fill_unspecified_params() {
97: Method &method=*junction.method;
98: if(method.params_names) // there are any named parameters might need filling?
99: for(; store_param_index<method.params_names->size(); store_param_index++) {
100: Value *value=NEW VUnknown(pool());
101: String& name=*static_cast<String *>(
102: method.params_names->get(store_param_index));
103: my->put(name, value);
104: value->set_name(name);
105: }
106: }
107:
108: Array *numbered_params() { return fnumbered_params; }
109:
110: public:
111:
112: const Junction& junction;
113:
114: private:
115: int store_param_index;
116: Hash *my;/*OR*/Array *fnumbered_params;
117: Value *fself;
118:
119: };
120:
121: #endif