Annotation of parser3/src/types/pa_vhash.h, revision 1.73
1.10 paf 1: /** @file
2: Parser: @b hash parser type decl.
3:
1.72 moko 4: Copyright (c) 2001-2015 Art. Lebedev Studio (http://www.artlebedev.com)
1.29 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1 paf 6: */
7:
8: #ifndef PA_VHASH_H
9: #define PA_VHASH_H
1.34 paf 10:
1.73 ! moko 11: #define IDENT_PA_VHASH_H "$Id: pa_vhash.h,v 1.72 2015/10/26 01:22:01 moko Exp $"
1.1 paf 12:
1.13 paf 13: #include "classes.h"
1.1 paf 14: #include "pa_value.h"
15: #include "pa_hash.h"
1.21 parser 16: #include "pa_vint.h"
1.46 paf 17: #include "pa_globals.h"
1.1 paf 18:
1.39 paf 19: // defines
20:
21: #define VHASH_TYPE "hash"
1.63 moko 22:
1.42 paf 23: #define HASH_FIELDS_NAME "fields"
1.47 paf 24: #define HASH_DEFAULT_ELEMENT_NAME "_default"
1.63 moko 25: extern const String hash_fields_name, hash_default_element_name;
1.26 paf 26:
1.46 paf 27: extern Methoded* hash_class;
1.13 paf 28:
1.26 paf 29: // forwards
30:
31: class VHash_lock;
32:
1.11 paf 33: /// value of type 'hash', implemented with Hash
1.46 paf 34: class VHash: public VStateless_object {
1.26 paf 35: friend class VHash_lock;
1.1 paf 36: public: // value
37:
1.46 paf 38: override const char* type() const { return VHASH_TYPE; }
39: override VStateless_class *get_class() { return hash_class; }
1.17 parser 40:
1.19 parser 41: /// VHash: finteger
1.46 paf 42: override int as_int() const { return fhash.count(); }
1.19 parser 43: /// VHash: finteger
1.68 misha 44: override double as_double() const { return fhash.count(); }
1.17 parser 45: /// VHash: count!=0
1.68 misha 46: override bool is_defined() const { return fhash.count()!=0; }
1.23 parser 47: /// VHash: count!=0
1.68 misha 48: override bool as_bool() const { return fhash.count()!=0; }
1.20 parser 49: /// VHash: count
1.65 moko 50: override Value& as_expr_result() { return *new VInt(as_int()); }
1.1 paf 51:
1.11 paf 52: /// VHash: fhash
1.46 paf 53: override HashStringValue *get_hash() { return &hash(); }
1.14 paf 54:
1.66 misha 55: override HashStringValue* get_fields() { return &fhash; }
56:
1.11 paf 57: /// VHash: (key)=value
1.62 misha 58: override Value* get_element(const String& aname) {
1.70 moko 59: // $element first
1.46 paf 60: if(Value* result=fhash.get(aname))
1.13 paf 61: return result;
1.42 paf 62:
63: // $fields -- pseudo field to make 'hash' more like 'table'
1.63 moko 64: if(aname == hash_fields_name)
1.42 paf 65: return this;
1.13 paf 66:
1.71 moko 67: #if !defined(FEATURE_GET_ELEMENT4CALL) || !defined(OPTIMIZE_BYTECODE_GET_ELEMENT__SPECIAL)
1.73 ! moko 68: // $method, CLASS, CLASS_NAME
1.62 misha 69: if(Value* result=VStateless_object::get_element(aname))
1.16 parser 70: return result;
1.71 moko 71: #endif
1.16 parser 72:
73: // default value
1.22 parser 74: return get_default();
1.1 paf 75: }
76:
1.70 moko 77: #ifdef FEATURE_GET_ELEMENT4CALL
78: override Value* get_element4call(const String& aname) {
79: // $method first
80: if(Value* result=VStateless_object::get_element(aname))
81: return result;
82:
83: // $element
84: if(Value* result=fhash.get(aname))
85: return result;
86:
87: // default value
88: return get_default();
89: }
90: #endif
91:
1.11 paf 92: /// VHash: (key)=value
1.69 moko 93: override const VJunction* put_element(const String& aname, Value* avalue) {
1.63 moko 94: if(aname==hash_default_element_name)
1.47 paf 95: set_default(avalue);
96: else
97: if(flocked) {
1.55 paf 98: if(!fhash.put_replaced(aname, avalue))
1.59 misha 99: throw Exception(PARSER_RUNTIME,
1.47 paf 100: &aname,
101: "can not insert new hash key (hash flocked)");
102: } else
103: fhash.put(aname, avalue);
1.36 paf 104:
1.54 paf 105: return PUT_ELEMENT_REPLACED_ELEMENT;
1.1 paf 106: }
1.52 paf 107:
1.61 misha 108: override VFile* as_vfile(String::Language lang, const Request_charsets *charsets=0);
1.1 paf 109:
110: public: // usage
111:
1.47 paf 112: VHash(): flocked(false), _default(0) {}
1.18 parser 113:
1.47 paf 114: VHash(const HashStringValue& source): fhash(source), flocked(false), _default(0) {}
1.7 paf 115:
1.46 paf 116: HashStringValue& hash() {
117: check_lock();
1.26 paf 118: return fhash;
119: }
1.1 paf 120:
1.67 moko 121: HashStringValue& hash_ro() {
122: return fhash;
123: }
124:
1.44 paf 125: void set_default(Value* adefault) {
1.47 paf 126: _default=adefault;
1.22 parser 127: }
1.46 paf 128: Value* get_default() {
1.47 paf 129: return _default;
1.22 parser 130: }
1.53 paf 131:
132: void extract_default();
1.13 paf 133:
1.46 paf 134: void check_lock() {
135: if(flocked)
1.59 misha 136: throw Exception(PARSER_RUNTIME,
1.46 paf 137: 0,
138: "can not modify hash (flocked)");
1.26 paf 139: }
140:
1.1 paf 141: private:
1.6 paf 142:
1.48 paf 143: HashStringValue fhash;
1.46 paf 144: bool flocked;
1.47 paf 145: Value* _default;
1.26 paf 146:
147: };
148:
149: class VHash_lock {
150: VHash& fhash;
151: bool saved;
152: public:
1.46 paf 153: VHash_lock(VHash& ahash): fhash(ahash) {
154: saved=fhash.flocked;
155: fhash.flocked=true;
1.26 paf 156: }
157: ~VHash_lock() {
1.46 paf 158: fhash.flocked=saved;
1.26 paf 159: }
1.6 paf 160:
1.1 paf 161: };
162:
163: #endif
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