Annotation of parser3/src/types/pa_wcontext.h, revision 1.55
1.12 paf 1: /** @file
2: Parser: write context class decl.
3:
1.51 misha 4: Copyright (c) 2001-2009 ArtLebedev Group (http://www.artlebedev.com)
1.27 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1 paf 6: */
7:
8: #ifndef PA_WCONTEXT_H
9: #define PA_WCONTEXT_H
1.33 paf 10:
1.55 ! misha 11: static const char * const IDENT_WCONTEXT_H="$Date: 2009-06-16 08:38:40 $";
1.1 paf 12:
13: #include "pa_value.h"
14: #include "pa_vstring.h"
15: #include "pa_vhash.h"
16:
1.54 misha 17: #define OPTIMIZE_CONSTRUCT_OBJECT
18:
1.1 paf 19: class Request;
20:
1.29 paf 21: class StringOrValue {
22: public:
23: StringOrValue() : fstring(0), fvalue(0) {}
24: /// anticipating either String or Value [must not be 0&0]
1.47 paf 25: StringOrValue(const String& astring) : fstring(&astring), fvalue(0) {}
26: StringOrValue(Value& avalue) : fstring(0), fvalue(&avalue) {}
27:
1.30 paf 28: void set_string(const String& astring) { fstring=&astring; }
1.29 paf 29: void set_value(Value& avalue) { fvalue=&avalue; }
1.43 paf 30: const String* get_string() { return fstring; }
31: Value* get_value() { return fvalue; }
1.29 paf 32: Value& as_value() const {
1.43 paf 33: Value* result=fvalue?fvalue:new VString(*fstring);
34: return *result;
1.29 paf 35: }
36: const String& as_string() const {
37: return fstring?*fstring:fvalue->as_string();
38: }
39: private:
1.43 paf 40: const String* fstring;
41: Value* fvalue;
1.29 paf 42: };
43:
1.12 paf 44: /** Write context
45: they do different write()s here, later picking up the result
46: @see Request::wcontext
47: */
1.43 paf 48: class WContext: public Value {
1.18 paf 49: friend class Request;
1.19 paf 50:
1.1 paf 51: public: // Value
52:
1.43 paf 53: override const char* type() const { return "wcontext"; }
1.12 paf 54: /// WContext: accumulated fstring
1.51 misha 55: override const String* get_string() {
56: static String empty;
57: return fstring?fstring:∅
58: };
1.1 paf 59:
1.12 paf 60: /// WContext: none yet | transparent
1.43 paf 61: override VStateless_class *get_class() { return fvalue?fvalue->get_class():0; }
1.1 paf 62:
63: public: // WContext
64:
1.12 paf 65: /// appends a fstring to result
1.43 paf 66: virtual void write(const String& astring, String::Language alang) {
1.51 misha 67: if(!fstring) fstring=new String;
68: fstring->append(astring, alang);
1.35 paf 69: }
1.32 paf 70: /// writes Value; raises an error if already, providing origin
1.43 paf 71: virtual void write(Value& avalue);
1.1 paf 72:
1.12 paf 73: /**
74: if value is VString writes fstring,
1.32 paf 75: else writes Value; raises an error if already, providing origin
76: */
1.53 misha 77: virtual void write(Value& avalue, String::Language alang) {
1.43 paf 78: if(const String* fstring=avalue.get_string())
79: write(*fstring, alang);
1.32 paf 80: else
1.43 paf 81: write(avalue);
1.32 paf 82: }
1.1 paf 83:
1.12 paf 84: /**
85: retrives the resulting value
1.29 paf 86: that can be String if value==0 or the Value object
1.12 paf 87: wmethod_frame first checks for $result and if there is one, returns it instead
88: */
1.29 paf 89: virtual StringOrValue result() {
1.51 misha 90: static String empty;
91: return fvalue?StringOrValue(*fvalue):StringOrValue(fstring?*fstring:empty);
1.7 paf 92: }
93:
1.52 misha 94: void attach_junction(VJunction* ajunction) {
1.43 paf 95: junctions+=ajunction;
1.39 paf 96: }
97:
1.1 paf 98: public: // usage
99:
1.55 ! misha 100: WContext(WContext *aparent):
! 101: fparent(aparent),
1.51 misha 102: fstring(0),
1.55 ! misha 103: fvalue(0),
1.54 misha 104: #ifndef OPTIMIZE_CONSTRUCT_OBJECT
105: constructing(false),
106: #endif
107: in_expression(false),
108: entered_class(false){}
109:
1.44 paf 110: virtual ~WContext() {
1.39 paf 111: detach_junctions();
112: }
1.1 paf 113:
1.54 misha 114: #ifdef OPTIMIZE_CONSTRUCT_OBJECT
115: #define GET_CONSTRUCTING(w) false
116: #define SET_CONSTRUCTING(w,v)
117: #else
1.48 paf 118: void set_constructing(bool aconstructing) { constructing=aconstructing; }
119: bool get_constructing() { return constructing; }
1.54 misha 120: #define GET_CONSTRUCTING(w) (w->get_constructing())
121: #define SET_CONSTRUCTING(w,v) w->set_constructing(v);
122: #endif
1.19 paf 123:
1.48 paf 124: void set_in_expression(bool ain_expression) { in_expression=ain_expression; }
125: bool get_in_expression() { return in_expression; }
1.28 paf 126:
1.48 paf 127: void set_somebody_entered_some_class() { entered_class=true; }
128: bool get_somebody_entered_some_class() { return entered_class; }
1.14 paf 129:
1.39 paf 130: private:
131:
132: void detach_junctions();
133:
1.1 paf 134: protected:
1.55 ! misha 135: WContext *fparent;
1.51 misha 136: String* fstring;
1.43 paf 137: Value* fvalue;
1.48 paf 138:
139: private: // status
140:
1.54 misha 141: #ifndef OPTIMIZE_CONSTRUCT_OBJECT
1.48 paf 142: bool constructing;
1.54 misha 143: #endif
1.48 paf 144: bool in_expression;
145: bool entered_class;
1.39 paf 146:
147: private:
1.52 misha 148: Array<VJunction*> junctions;
1.38 paf 149:
1.1 paf 150: };
151:
152: #endif
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