Annotation of parser3/src/types/pa_vmframe.h, revision 1.8
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:
1.8 ! paf 6: $Id: pa_vmframe.h,v 1.7 2001/03/16 10:38:08 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
! 48: return result && result->get_defined()?result:WContext::result();
! 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; }
88:
1.3 paf 89: void store_param(const String& actual_method_name, Value *value) {
1.5 paf 90: const Method& method=*junction.method;
1.1 paf 91: int max_params=
92: method.max_numbered_params_count?method.max_numbered_params_count:
93: method.params_names?method.params_names->size():
94: 0;
95: if(store_param_index==max_params)
96: THROW(0,0,
1.3 paf 97: &actual_method_name,
98: "method of %s (%s) accepts maximum %d parameter(s)",
99: junction.self.name().cstr(),
1.1 paf 100: junction.self.type(),
101: max_params);
102:
103: if(method.max_numbered_params_count) { // are this method params numbered?
104: *fnumbered_params+=value;
105: } else { // named param
1.8 ! paf 106: // speedup: not checking for clash with "result" name
1.7 paf 107: const String& name=*method.params_names->get_string(store_param_index);
1.1 paf 108: my->put(name, value); // remember param
109: value->set_name(name); // set param's 'name'
110: }
1.7 paf 111: store_param_index++;
1.1 paf 112: }
113: void fill_unspecified_params() {
1.5 paf 114: const Method &method=*junction.method;
1.1 paf 115: if(method.params_names) // there are any named parameters might need filling?
116: for(; store_param_index<method.params_names->size(); store_param_index++) {
117: Value *value=NEW VUnknown(pool());
1.4 paf 118: const String& name=*method.params_names->get_string(store_param_index);
1.1 paf 119: my->put(name, value);
120: value->set_name(name);
121: }
122: }
123:
124: Array *numbered_params() { return fnumbered_params; }
125:
126: public:
127:
128: const Junction& junction;
129:
130: private:
131: int store_param_index;
132: Hash *my;/*OR*/Array *fnumbered_params;
133: Value *fself;
134:
135: };
136:
137: #endif
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