Annotation of parser3/src/types/pa_vmframe.h, revision 1.10
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:
1.10 ! paf 6: $Id: pa_vmframe.h,v 1.9 2001/03/27 16:35:57 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
1.6 paf 37: VStateless_class* get_class() { return fself->get_class(); }
1.1 paf 38:
39: // methodframe: self_transparent
40: VAliased *get_aliased() { return fself->get_aliased(); }
41:
1.8 paf 42: public: // wcontext
43:
44: Value *result() const {
45: // check the $result value
46: Value *result=my?static_cast<Value*>(my->get(*result_var_name)):0;
47: // if we have one, return it, else return as usual: accumulated fstring or fvalue
1.9 paf 48: return result && result->is_defined()?result:WContext::result();
1.8 paf 49: }
50:
1.1 paf 51: public: // usage
52:
53: VMethodFrame(Pool& apool, const Junction& ajunction/*info: always method-junction*/) :
54: WContext(apool, 0 /* empty */, false /* not constructing */),
55:
56: junction(ajunction),
57: store_param_index(0),
58: my(0), fnumbered_params(0),
59: fself(0) {
60:
1.5 paf 61: const Method &method=*junction.method;
1.1 paf 62:
63: if(method.max_numbered_params_count) // are this method params numbered?
64: fnumbered_params=NEW Array(pool()); // create storage
1.8 paf 65: else { // named params
1.1 paf 66: my=NEW Hash(pool()); // create storage
1.8 paf 67:
68: if(method.locals_names) { // are there any local var names?
69: // remember them
70: // those are flags that name is local == to be looked up in 'my'
71: for(int i=0; i<method.locals_names->size(); i++) {
72: // speedup: not checking for clash with "result" name
73: Value *value=NEW VUnknown(pool());
74: const String& name=*method.locals_names->get_string(i);
75: my->put(name, value);
76: value->set_name(name);
77: }
78: }
79: { // always there is one local: $result
80: Value *result_value=NEW VUnknown(pool());
81: my->put(*result_var_name, result_value);
82: result_value->set_name(*result_var_name);
1.1 paf 83: }
84: }
85: }
86:
87: void set_self(Value& aself) { fself=&aself; }
1.10 ! paf 88: Value *self() { return fself; }
1.1 paf 89:
1.3 paf 90: void store_param(const String& actual_method_name, Value *value) {
1.5 paf 91: const Method& method=*junction.method;
1.1 paf 92: int max_params=
93: method.max_numbered_params_count?method.max_numbered_params_count:
94: method.params_names?method.params_names->size():
95: 0;
96: if(store_param_index==max_params)
97: THROW(0,0,
1.3 paf 98: &actual_method_name,
99: "method of %s (%s) accepts maximum %d parameter(s)",
100: junction.self.name().cstr(),
1.1 paf 101: junction.self.type(),
102: max_params);
103:
104: if(method.max_numbered_params_count) { // are this method params numbered?
105: *fnumbered_params+=value;
106: } else { // named param
1.8 paf 107: // speedup: not checking for clash with "result" name
1.7 paf 108: const String& name=*method.params_names->get_string(store_param_index);
1.1 paf 109: my->put(name, value); // remember param
110: value->set_name(name); // set param's 'name'
111: }
1.7 paf 112: store_param_index++;
1.1 paf 113: }
114: void fill_unspecified_params() {
1.5 paf 115: const Method &method=*junction.method;
1.1 paf 116: if(method.params_names) // there are any named parameters might need filling?
117: for(; store_param_index<method.params_names->size(); store_param_index++) {
118: Value *value=NEW VUnknown(pool());
1.4 paf 119: const String& name=*method.params_names->get_string(store_param_index);
1.1 paf 120: my->put(name, value);
121: value->set_name(name);
122: }
123: }
124:
125: Array *numbered_params() { return fnumbered_params; }
126:
127: public:
128:
129: const Junction& junction;
130:
131: private:
132: int store_param_index;
133: Hash *my;/*OR*/Array *fnumbered_params;
134: Value *fself;
135:
136: };
137:
138: #endif
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