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authorMike Buland <eichlan@xagasoft.com>2012-11-05 22:41:51 +0000
committerMike Buland <eichlan@xagasoft.com>2012-11-05 22:41:51 +0000
commitec05778d5718a7912e506764d443a78d6a6179e3 (patch)
tree78a9a01532180030c095acefc45763f07c14edb8 /src/experimental/parser.cpp
parentb20414ac1fe80a71a90601f4cd1767fa7014a9ba (diff)
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Diffstat (limited to 'src/experimental/parser.cpp')
-rw-r--r--src/experimental/parser.cpp342
1 files changed, 171 insertions, 171 deletions
diff --git a/src/experimental/parser.cpp b/src/experimental/parser.cpp
index 9f10256..5d0d7eb 100644
--- a/src/experimental/parser.cpp
+++ b/src/experimental/parser.cpp
@@ -21,231 +21,231 @@ Bu::Parser::~Parser()
21 21
22void Bu::Parser::pushLexer( Lexer *pLex ) 22void Bu::Parser::pushLexer( Lexer *pLex )
23{ 23{
24 sLexer.push( pLex ); 24 sLexer.push( pLex );
25} 25}
26 26
27void Bu::Parser::popLexer() 27void Bu::Parser::popLexer()
28{ 28{
29 delete sLexer.peekPop(); 29 delete sLexer.peekPop();
30} 30}
31 31
32Lexer::Token *Bu::Parser::popToken() 32Lexer::Token *Bu::Parser::popToken()
33{ 33{
34 return sToken.peekPop(); 34 return sToken.peekPop();
35} 35}
36 36
37void Bu::Parser::pushToken( Lexer::Token *pTok ) 37void Bu::Parser::pushToken( Lexer::Token *pTok )
38{ 38{
39 sToken.push( pTok ); 39 sToken.push( pTok );
40} 40}
41 41
42void Bu::Parser::parse() 42void Bu::Parser::parse()
43{ 43{
44 int iCurNt = iRootNonTerminal; 44 int iCurNt = iRootNonTerminal;
45 Lexer::Token *ptCur = sLexer.peek()->nextToken(); 45 Lexer::Token *ptCur = sLexer.peek()->nextToken();
46 sio << "Token(a): " << sLexer.peek()->tokenToString( *ptCur ) << sio.nl; 46 sio << "Token(a): " << sLexer.peek()->tokenToString( *ptCur ) << sio.nl;
47 selectProduction( iCurNt, ptCur ); 47 selectProduction( iCurNt, ptCur );
48 48
49 while( !sState.isEmpty() ) 49 while( !sState.isEmpty() )
50 { 50 {
51 switch( (*sState.peek()).eType ) 51 switch( (*sState.peek()).eType )
52 { 52 {
53 case State::typeTerminal: 53 case State::typeTerminal:
54 sio << "terminal: " << ptCur->iToken << " == " 54 sio << "terminal: " << ptCur->iToken << " == "
55 << (*sState.peek()).iIndex << sio.nl; 55 << (*sState.peek()).iIndex << sio.nl;
56 if( ptCur->iToken == (*sState.peek()).iIndex ) 56 if( ptCur->iToken == (*sState.peek()).iIndex )
57 { 57 {
58 advanceState(); 58 advanceState();
59 delete ptCur; 59 delete ptCur;
60 ptCur = sLexer.peek()->nextToken(); 60 ptCur = sLexer.peek()->nextToken();
61 sio << "Token(b): " << sLexer.peek()->tokenToString( *ptCur ) << sio.nl; 61 sio << "Token(b): " << sLexer.peek()->tokenToString( *ptCur ) << sio.nl;
62 } 62 }
63 else 63 else
64 { 64 {
65 throw Bu::ExceptionBase("Error parsing code."); 65 throw Bu::ExceptionBase("Error parsing code.");
66 } 66 }
67 break; 67 break;
68 68
69 case State::typeTerminalPush: 69 case State::typeTerminalPush:
70 sio << "terminalpush: " << ptCur->iToken << " == " 70 sio << "terminalpush: " << ptCur->iToken << " == "
71 << (*sState.peek()).iIndex << sio.nl; 71 << (*sState.peek()).iIndex << sio.nl;
72 if( ptCur->iToken == (*sState.peek()).iIndex ) 72 if( ptCur->iToken == (*sState.peek()).iIndex )
73 { 73 {
74 advanceState(); 74 advanceState();
75 sToken.push( ptCur ); 75 sToken.push( ptCur );
76 76
77 ptCur = sLexer.peek()->nextToken(); 77 ptCur = sLexer.peek()->nextToken();
78 sio << "Token(c): " << sLexer.peek()->tokenToString( *ptCur ) << sio.nl; 78 sio << "Token(c): " << sLexer.peek()->tokenToString( *ptCur ) << sio.nl;
79 } 79 }
80 else 80 else
81 { 81 {
82 throw Bu::ExceptionBase("Error parsing code."); 82 throw Bu::ExceptionBase("Error parsing code.");
83 } 83 }
84 break; 84 break;
85 85
86 case State::typeNonTerminal: 86 case State::typeNonTerminal:
87 sio << "nonterminal: " << ptCur->iToken << " --> " 87 sio << "nonterminal: " << ptCur->iToken << " --> "
88 << (*sState.peek()).iIndex << sio.nl; 88 << (*sState.peek()).iIndex << sio.nl;
89 { 89 {
90 int iNt = (*sState.peek()).iIndex; 90 int iNt = (*sState.peek()).iIndex;
91 sio << "Current state: " << *sState.peek() << sio.nl; 91 sio << "Current state: " << *sState.peek() << sio.nl;
92 if( !selectProduction( iNt, ptCur ) ) 92 if( !selectProduction( iNt, ptCur ) )
93 { 93 {
94 throw Bu::ExceptionBase("Error parsing code."); 94 throw Bu::ExceptionBase("Error parsing code.");
95 } 95 }
96 } 96 }
97 break; 97 break;
98 98
99 case State::typeReduction: 99 case State::typeReduction:
100 sio << "reduction" << sio.nl; 100 sio << "reduction" << sio.nl;
101 aReduction[(*sState.peek()).iIndex]( *this ); 101 aReduction[(*sState.peek()).iIndex]( *this );
102 advanceState(); 102 advanceState();
103 break; 103 break;
104 } 104 }
105 } 105 }
106} 106}
107 107
108bool Bu::Parser::selectProduction( int iNt, Lexer::Token *ptCur ) 108bool Bu::Parser::selectProduction( int iNt, Lexer::Token *ptCur )
109{ 109{
110 NonTerminal &nt = aNonTerminal[iNt]; 110 NonTerminal &nt = aNonTerminal[iNt];
111 int j = 0; 111 int j = 0;
112 for( NonTerminal::ProductionList::iterator i = nt.lProduction.begin(); 112 for( NonTerminal::ProductionList::iterator i = nt.lProduction.begin();
113 i; i++,j++ ) 113 i; i++,j++ )
114 { 114 {
115 if( (*i).isEmpty() ) 115 if( (*i).isEmpty() )
116 continue; 116 continue;
117 sio << "-->(Attempting production " << iNt << ":" << j << ": " 117 sio << "-->(Attempting production " << iNt << ":" << j << ": "
118 << (*i).first() << ")" << sio.nl; 118 << (*i).first() << ")" << sio.nl;
119 if( (*i).first().eType == State::typeTerminal || 119 if( (*i).first().eType == State::typeTerminal ||
120 (*i).first().eType == State::typeTerminalPush ) 120 (*i).first().eType == State::typeTerminalPush )
121 { 121 {
122 if( (*i).first().iIndex == ptCur->iToken ) 122 if( (*i).first().iIndex == ptCur->iToken )
123 { 123 {
124 sState.push( (*i).begin() ); 124 sState.push( (*i).begin() );
125 sio.incIndent(); 125 sio.incIndent();
126 sio << "Pushing production " << j << " from nt " << iNt 126 sio << "Pushing production " << j << " from nt " << iNt
127 << sio.nl; 127 << sio.nl;
128 return true; 128 return true;
129 } 129 }
130 } 130 }
131 else if( (*i).first().eType == State::typeNonTerminal ) 131 else if( (*i).first().eType == State::typeNonTerminal )
132 { 132 {
133 sState.push( (*i).begin() ); 133 sState.push( (*i).begin() );
134 sio.incIndent(); 134 sio.incIndent();
135 sio << "Pushing production " << j << " from nt " << iNt 135 sio << "Pushing production " << j << " from nt " << iNt
136 << " as test." << sio.nl; 136 << " as test." << sio.nl;
137 if( !selectProduction( (*i).first().iIndex, ptCur ) ) 137 if( !selectProduction( (*i).first().iIndex, ptCur ) )
138 { 138 {
139 sio.decIndent(); 139 sio.decIndent();
140 sState.pop(); 140 sState.pop();
141 sio << "Production " << j << " from nt " << iNt 141 sio << "Production " << j << " from nt " << iNt
142 << " didn't work out." << sio.nl; 142 << " didn't work out." << sio.nl;
143 } 143 }
144 else 144 else
145 { 145 {
146 return true; 146 return true;
147 } 147 }
148 } 148 }
149 } 149 }
150 if( nt.bCanSkip ) 150 if( nt.bCanSkip )
151 { 151 {
152 sio << "Nothing matches, skipping non-terminal." << sio.nl; 152 sio << "Nothing matches, skipping non-terminal." << sio.nl;
153 advanceState(); 153 advanceState();
154 return true; 154 return true;
155 } 155 }
156 sio << "-->(Found nothing)" << sio.nl; 156 sio << "-->(Found nothing)" << sio.nl;
157 return false; 157 return false;
158} 158}
159 159
160void Bu::Parser::advanceState() 160void Bu::Parser::advanceState()
161{ 161{
162 if( sState.isEmpty() ) 162 if( sState.isEmpty() )
163 return; 163 return;
164 164
165 sState.peek()++; 165 sState.peek()++;
166 if( !sState.peek() ) 166 if( !sState.peek() )
167 { 167 {
168 sio.decIndent(); 168 sio.decIndent();
169 sState.pop(); 169 sState.pop();
170 sio << "State advanced, End of production." << sio.nl; 170 sio << "State advanced, End of production." << sio.nl;
171 advanceState(); 171 advanceState();
172 return; 172 return;
173 } 173 }
174 sio << "State advanced, now: " << *(sState.peek()) << sio.nl; 174 sio << "State advanced, now: " << *(sState.peek()) << sio.nl;
175} 175}
176 176
177void Bu::Parser::setRootNonTerminal( int iRoot ) 177void Bu::Parser::setRootNonTerminal( int iRoot )
178{ 178{
179 iRootNonTerminal = iRoot; 179 iRootNonTerminal = iRoot;
180} 180}
181 181
182void Bu::Parser::setRootNonTerminal( const Bu::String &sRoot ) 182void Bu::Parser::setRootNonTerminal( const Bu::String &sRoot )
183{ 183{
184 setRootNonTerminal( hNonTerminalName.get( sRoot ) ); 184 setRootNonTerminal( hNonTerminalName.get( sRoot ) );
185} 185}
186 186
187int Bu::Parser::addNonTerminal( const Bu::String &sName, NonTerminal &nt ) 187int Bu::Parser::addNonTerminal( const Bu::String &sName, NonTerminal &nt )
188{ 188{
189 int iId = aNonTerminal.getSize(); 189 int iId = aNonTerminal.getSize();
190 aNonTerminal.append( nt ); 190 aNonTerminal.append( nt );
191 hNonTerminalName.insert( sName, iId ); 191 hNonTerminalName.insert( sName, iId );
192 sio << "nt '" << sName << "' = " << iId << sio.nl; 192 sio << "nt '" << sName << "' = " << iId << sio.nl;
193 return iId; 193 return iId;
194} 194}
195 195
196int Bu::Parser::addNonTerminal( const Bu::String &sName ) 196int Bu::Parser::addNonTerminal( const Bu::String &sName )
197{ 197{
198 int iId = aNonTerminal.getSize(); 198 int iId = aNonTerminal.getSize();
199 aNonTerminal.append( NonTerminal() ); 199 aNonTerminal.append( NonTerminal() );
200 hNonTerminalName.insert( sName, iId ); 200 hNonTerminalName.insert( sName, iId );
201 sio << "nt '" << sName << "' = " << iId << sio.nl; 201 sio << "nt '" << sName << "' = " << iId << sio.nl;
202 return iId; 202 return iId;
203} 203}
204 204
205void Bu::Parser::setNonTerminal( const Bu::String &sName, NonTerminal &nt ) 205void Bu::Parser::setNonTerminal( const Bu::String &sName, NonTerminal &nt )
206{ 206{
207 aNonTerminal[hNonTerminalName.get(sName)] = nt; 207 aNonTerminal[hNonTerminalName.get(sName)] = nt;
208} 208}
209 209
210int Bu::Parser::getNonTerminalId( const Bu::String &sName ) 210int Bu::Parser::getNonTerminalId( const Bu::String &sName )
211{ 211{
212 return hNonTerminalName.get( sName ); 212 return hNonTerminalName.get( sName );
213} 213}
214 214
215bool Bu::Parser::hasNonTerminal( const Bu::String &sName ) 215bool Bu::Parser::hasNonTerminal( const Bu::String &sName )
216{ 216{
217 return hNonTerminalName.has( sName ); 217 return hNonTerminalName.has( sName );
218} 218}
219 219
220int Bu::Parser::addReduction( const Bu::String &sName, const Reduction &r ) 220int Bu::Parser::addReduction( const Bu::String &sName, const Reduction &r )
221{ 221{
222 int iId = aReduction.getSize(); 222 int iId = aReduction.getSize();
223 aReduction.append( r ); 223 aReduction.append( r );
224 hReductionName.insert( sName, iId ); 224 hReductionName.insert( sName, iId );
225 return iId; 225 return iId;
226} 226}
227 227
228int Bu::Parser::addReduction( const Bu::String &sName ) 228int Bu::Parser::addReduction( const Bu::String &sName )
229{ 229{
230 int iId = aReduction.getSize(); 230 int iId = aReduction.getSize();
231 aReduction.append( Reduction() ); 231 aReduction.append( Reduction() );
232 hReductionName.insert( sName, iId ); 232 hReductionName.insert( sName, iId );
233 return iId; 233 return iId;
234} 234}
235 235
236void Bu::Parser::setReduction( const Bu::String &sName, const Reduction &r ) 236void Bu::Parser::setReduction( const Bu::String &sName, const Reduction &r )
237{ 237{
238 aReduction[hReductionName.get(sName)] = r; 238 aReduction[hReductionName.get(sName)] = r;
239} 239}
240 240
241int Bu::Parser::getReductionId( const Bu::String &sName ) 241int Bu::Parser::getReductionId( const Bu::String &sName )
242{ 242{
243 return hReductionName.get( sName ); 243 return hReductionName.get( sName );
244} 244}
245 245
246bool Bu::Parser::hasReduction( const Bu::String &sName ) 246bool Bu::Parser::hasReduction( const Bu::String &sName )
247{ 247{
248 return hReductionName.has( sName ); 248 return hReductionName.has( sName );
249} 249}
250 250
251// 251//
@@ -253,8 +253,8 @@ bool Bu::Parser::hasReduction( const Bu::String &sName )
253// 253//
254 254
255Bu::Parser::State::State( Bu::Parser::State::Type eType, int iIndex ) : 255Bu::Parser::State::State( Bu::Parser::State::Type eType, int iIndex ) :
256 eType( eType ), 256 eType( eType ),
257 iIndex( iIndex ) 257 iIndex( iIndex )
258{ 258{
259} 259}
260 260
@@ -267,7 +267,7 @@ Bu::Parser::State::~State()
267// 267//
268 268
269Bu::Parser::NonTerminal::NonTerminal() : 269Bu::Parser::NonTerminal::NonTerminal() :
270 bCanSkip( false ) 270 bCanSkip( false )
271{ 271{
272} 272}
273 273
@@ -277,35 +277,35 @@ Bu::Parser::NonTerminal::~NonTerminal()
277 277
278void Bu::Parser::NonTerminal::addProduction( Production p ) 278void Bu::Parser::NonTerminal::addProduction( Production p )
279{ 279{
280 lProduction.append( p ); 280 lProduction.append( p );
281} 281}
282 282
283void Bu::Parser::NonTerminal::setCanSkip() 283void Bu::Parser::NonTerminal::setCanSkip()
284{ 284{
285 bCanSkip = true; 285 bCanSkip = true;
286} 286}
287 287
288Bu::Formatter &Bu::operator<<( Bu::Formatter &f, Bu::Parser::State::Type t ) 288Bu::Formatter &Bu::operator<<( Bu::Formatter &f, Bu::Parser::State::Type t )
289{ 289{
290 switch( t ) 290 switch( t )
291 { 291 {
292 case Bu::Parser::State::typeTerminal: 292 case Bu::Parser::State::typeTerminal:
293 return f << "typeTerminal"; 293 return f << "typeTerminal";
294 294
295 case Bu::Parser::State::typeTerminalPush: 295 case Bu::Parser::State::typeTerminalPush:
296 return f << "typeTerminalPush"; 296 return f << "typeTerminalPush";
297 297
298 case Bu::Parser::State::typeNonTerminal: 298 case Bu::Parser::State::typeNonTerminal:
299 return f << "typeNonTerminal"; 299 return f << "typeNonTerminal";
300 300
301 case Bu::Parser::State::typeReduction: 301 case Bu::Parser::State::typeReduction:
302 return f << "typeReduction"; 302 return f << "typeReduction";
303 } 303 }
304 return f << "***error***"; 304 return f << "***error***";
305} 305}
306 306
307Bu::Formatter &Bu::operator<<( Bu::Formatter &f, const Bu::Parser::State &s ) 307Bu::Formatter &Bu::operator<<( Bu::Formatter &f, const Bu::Parser::State &s )
308{ 308{
309 return f << "{" << s.eType << ": " << s.iIndex << "}"; 309 return f << "{" << s.eType << ": " << s.iIndex << "}";
310} 310}
311 311