src/mdParser/MDParser.g

header
{

#include "antlr/CharScanner.hpp"
#include "utils/StringUtils.hpp"
#include "mdParser/FilenameObserver.hpp"
}

options
  {
  language = "Cpp";
  }
                     
class MDParser extends Parser;

options
{
        k = 3;
        exportVocab = MD;
        buildAST = true;
        codeGenMakeSwitchThreshold = 2;
        codeGenBitsetTestThreshold = 3;
        
}

tokens
{
  COMPONENT   = "component";
  MOLECULE    = "molecule";
  ZCONSTRAINT = "zconstraint";
  RESTRAINT   = "restraint";
  ATOM        = "atom";
  BOND        = "bond";
  BEND        = "bend";
  TORSION     = "torsion";
  INVERSION   = "inversion";
  RIGIDBODY   = "rigidBody";
  CUTOFFGROUP = "cutoffGroup";
  FRAGMENT    = "fragment";
  MEMBERS     = "members";
  CENTER      = "center";
  SATELLITES  = "satellites";
  POSITION    = "position";
  ORIENTATION = "orientation";
  FLUCQ       = "flucQ";
  RNEMD       = "RNEMD";
  MINIMIZER   = "minimizer";
  ENDBLOCK;
}


mdfile  : (statement)*
        ;

statement : assignment
    | componentblock
    | moleculeblock
    | zconstraintblock
    | restraintblock
    | flucqblock
    | rnemdblock
    | minimizerblock
    ;

assignment  : ID ASSIGNEQUAL^ constant SEMICOLON!
            ;
            
constant    : intConst
                        | floatConst
            | vectorConst
            | ID
            | StringLiteral
            ;

componentblock  : COMPONENT^ LCURLY! (assignment)* RCURLY {#RCURLY->setType(ENDBLOCK);}
                ;
    
zconstraintblock  : ZCONSTRAINT^ LCURLY! (assignment)* RCURLY {#RCURLY->setType(ENDBLOCK);}
                  ;

restraintblock  : RESTRAINT^ LCURLY! (assignment)* RCURLY {#RCURLY->setType(ENDBLOCK);}
                  ;

flucqblock  : FLUCQ^ LCURLY! (assignment)* RCURLY {#RCURLY->setType(ENDBLOCK);}
    ;

rnemdblock  : RNEMD^ LCURLY! (assignment)* RCURLY {#RCURLY->setType(ENDBLOCK);}
    ;

minimizerblock  : MINIMIZER^ LCURLY! (assignment)* RCURLY {#RCURLY->setType(ENDBLOCK);}
    ;
  
moleculeblock : MOLECULE^ LCURLY! (moleculestatement)*  RCURLY {#RCURLY->setType(ENDBLOCK);}
              ;

moleculestatement : assignment
                  | atomblock
                  | bondblock
                  | bendblock
                  | torsionblock
                  | inversionblock
                  | rigidbodyblock
                  | cutoffgroupblock
                  | fragmentblock
                  ;

atomblock : ATOM^ LBRACKET! intConst RBRACKET! LCURLY! (atomstatement)* RCURLY {#RCURLY->setType(ENDBLOCK);}
          ;

atomstatement : assignment
              | POSITION^ LPAREN! doubleNumberTuple RPAREN! SEMICOLON!
              | ORIENTATION^  LPAREN! doubleNumberTuple RPAREN! SEMICOLON!
              ;

                      
bondblock : BOND^ (LBRACKET! intConst! RBRACKET!)?  LCURLY!(bondstatement)* RCURLY {#RCURLY->setType(ENDBLOCK);}
          ;

bondstatement : assignment
              | MEMBERS^ LPAREN! inttuple RPAREN! SEMICOLON!
              ;

bendblock : BEND^ (LBRACKET! intConst! RBRACKET!)? LCURLY!  (bendstatement)* RCURLY {#RCURLY->setType(ENDBLOCK);}
          ;

bendstatement : assignment
              | MEMBERS^ LPAREN! inttuple RPAREN! SEMICOLON!
              ;

torsionblock  : TORSION^ (LBRACKET! intConst! RBRACKET!)?  LCURLY!(torsionstatement)* RCURLY {#RCURLY->setType(ENDBLOCK);}
          ;

torsionstatement  : assignment
              | MEMBERS^ LPAREN! inttuple RPAREN! SEMICOLON!
              ;

inversionblock  : INVERSION^ (LBRACKET! intConst! RBRACKET!)?  LCURLY!(inversionstatement)* RCURLY {#RCURLY->setType(ENDBLOCK);}
          ;

inversionstatement  : assignment
              | CENTER^ LPAREN! intConst RPAREN! SEMICOLON!
              | SATELLITES^ LPAREN! inttuple RPAREN! SEMICOLON!
              ;

rigidbodyblock  : RIGIDBODY^  LBRACKET! intConst RBRACKET! LCURLY!(rigidbodystatement)* RCURLY {#RCURLY->setType(ENDBLOCK);}
                ;

rigidbodystatement  : assignment
              | MEMBERS^ LPAREN!  inttuple  RPAREN! SEMICOLON!
              ;

cutoffgroupblock  : CUTOFFGROUP^ (LBRACKET! intConst! RBRACKET!)? LCURLY! (cutoffgroupstatement)* RCURLY {#RCURLY->setType(ENDBLOCK);}
                  ;

cutoffgroupstatement  : assignment
              | MEMBERS^ LPAREN! inttuple RPAREN! SEMICOLON!
              ;

fragmentblock : FRAGMENT^ LBRACKET! intConst RBRACKET! LCURLY! (fragmentstatement)* RCURLY {#RCURLY->setType(ENDBLOCK);}
              ;

fragmentstatement : assignment
              ;


doubleNumberTuple   : doubleNumber (COMMA! doubleNumber)* 
              ;
                          
inttuple      : intConst (COMMA! intConst)*
              ;
              
protected
intConst
        :  NUM_INT | NUM_LONG
        ;

protected
doubleNumber  :  
                (intConst | floatConst)
              ;
              
protected
floatConst
        : 
          NUM_FLOAT | NUM_DOUBLE
        ;

protected
vectorConst
    : 
        LPAREN^ doubleNumber COMMA doubleNumber COMMA doubleNumber RPAREN
    ;

class MDLexer extends Lexer;

options
  {
  k = 3;
  exportVocab = MD;
  testLiterals = false;
  }

tokens {
    DOT;
}

{


        int deferredLineCount;
        FilenameObserver* observer;
        
  public:
        void setObserver(FilenameObserver* osv) {observer = osv;}
  void initDeferredLineCount() { deferredLineCount = 0;}
  void deferredNewline() { 
        deferredLineCount++;
  }

        
  virtual void newline() { 
                for (;deferredLineCount>0;deferredLineCount--) {
                        CharScanner::newline();
                }
    CharScanner::newline();
  }
    
}


// Operators:

ASSIGNEQUAL     : '=' ;
COLON           : ':' ;
COMMA           : ',' ;
QUESTIONMARK    : '?' ;
SEMICOLON       : ';' ;

LPAREN          : '(' ;
RPAREN          : ')' ;
LBRACKET        : '[' ;
RBRACKET        : ']' ;
LCURLY          : '{' ;
RCURLY          : '}' ;

Whitespace  
  : 
    ( // whitespace ignored
      (' ' |'\t' | '\f')
    | // handle newlines
      ( '\r' '\n' // MS
      | '\r'    // Mac
      | '\n'    // Unix 
      ) { newline(); }
    | // handle continuation lines
      ( '\\' '\r' '\n'  // MS
      | '\\' '\r'   // Mac
      | '\\' '\n'   // Unix 
      ) {printf("CPP_parser.g continuation line detected\n");
        deferredNewline();}
    ) 
    {_ttype = ANTLR_USE_NAMESPACE(antlr)Token::SKIP;}
  ;

Comment  
  : 
    "/*"   
    ( {LA(2) != '/'}? '*'
    | EndOfLine {deferredNewline();}
    | ~('*'| '\r' | '\n')
    )*
    "*/" {_ttype = ANTLR_USE_NAMESPACE(antlr)Token::SKIP;}
  ;

CPPComment
  : 
    "//" (~('\n' | '\r'))* EndOfLine
    {_ttype = ANTLR_USE_NAMESPACE(antlr)Token::SKIP; newline();}                     
  ;

PREPROC_DIRECTIVE
  options{paraphrase = "a line directive";}
  : 
    '#' LineDirective
    {_ttype = ANTLR_USE_NAMESPACE(antlr)Token::SKIP; newline();} 
  ;

protected 
LineDirective
  :
  {
   deferredLineCount = 0;
  }
    ("line")?  // this would be for if the directive started "#line"
    (Space)+
    n:Decimal { setLine(OpenMD::lexi_cast<int>(n->getText()) - 1); } 
    (Space)+
    (sl:StringLiteral) {std::string filename = sl->getText().substr(1,sl->getText().length()-2); observer->notify(filename);} 
    ((Space)+ Decimal)* // To support cpp flags (GNU)
    EndOfLine
  ;

protected  
Space
  : 
    (' '|'\t'|'\f')
  ;


// Literals:

/*
 * Note that we do NOT handle tri-graphs nor multi-byte sequences.
 */

/*
 * Note that we can't have empty character constants (even though we
 * can have empty strings :-).
 */
CharLiteral
  : 
    '\'' (Escape | ~('\'')) '\''
  ;

/*
 * Can't have raw imbedded newlines in string constants.  Strict reading of
 * the standard gives odd dichotomy between newlines & carriage returns.
 * Go figure.
 */
StringLiteral
  : 
    '"'
    ( Escape
    | 
      ( "\\\r\n"   // MS 
      | "\\\r"     // MAC
      | "\\\n"     // Unix
      ) {deferredNewline();}
    | 
      ~('"'|'\r'|'\n'|'\\')
    )*
    '"'
  ;

protected
EndOfLine
  : 
    ( options{generateAmbigWarnings = false;}:
      "\r\n"  // MS
    | '\r'    // Mac
    | '\n'    // Unix
    )
  ;

/*
 * Handle the various escape sequences.
 *
 * Note carefully that these numeric escape *sequences* are *not* of the
 * same form as the C language numeric *constants*.
 *
 * There is no such thing as a binary numeric escape sequence.
 *
 * Octal escape sequences are either 1, 2, or 3 octal digits exactly.
 *
 * There is no such thing as a decimal escape sequence.
 *
 * Hexadecimal escape sequences are begun with a leading \x and continue
 * until a non-hexadecimal character is found.
 *
 * No real handling of tri-graph sequences, yet.
 */

protected
Escape  
  : 
    '\\'
    ( options{warnWhenFollowAmbig=false;}:
      'a'
    | 'b'
    | 'f'
    | 'n'
    | 'r'
    | 't'
    | 'v'
    | '"'
    | '\''
    | '\\'
    | '?'
    | ('0'..'3') (options{warnWhenFollowAmbig=false;}: Digit (options{warnWhenFollowAmbig=false;}: Digit)? )?
    | ('4'..'7') (options{warnWhenFollowAmbig=false;}: Digit)?
    | 'x' (options{warnWhenFollowAmbig=false;}: Digit | 'a'..'f' | 'A'..'F')+
    )
  ;


protected
Vocabulary
  : 
    '\3'..'\377'
  ;


ID
  options {testLiterals = true;}
  : 
    ('a'..'z'|'A'..'Z'|'_')
    ('a'..'z'|'A'..'Z'|'_'|'0'..'9')*
  ;


protected
Digit
  : 
    '0'..'9'
  ;

protected
Decimal
  : 
    ('0'..'9')+
  ;

// hexadecimal digit (again, note it's protected!)
protected
HEX_DIGIT
        :       ('0'..'9'|'A'..'F'|'a'..'f')
        ;


// a numeric literal
NUM_INT
        {
                bool isDecimal = false;
                ANTLR_USE_NAMESPACE(antlr)RefToken t = ANTLR_USE_NAMESPACE(antlr)nullToken;
        }
    : ('+' | '-')?
    (
      '.' {_ttype = DOT;}
            (   ('0'..'9')+ (EXPONENT)? (f1:FLOAT_SUFFIX {t=f1;})?
            {
                                        if ( t &&
                                                  (t->getText().find('f') != ANTLR_USE_NAMESPACE(std)string::npos ||
                                                        t->getText().find('F') != ANTLR_USE_NAMESPACE(std)string::npos ) ) {
                                                _ttype = NUM_FLOAT;
                                        }
                                        else {
                                                _ttype = NUM_DOUBLE; // assume double
                                        }
                                }
            )?

        |       (       '0' {isDecimal = true;} // special case for just '0'
                        (       ('x'|'X')
                                (                                                                                       // hex
                                        // the 'e'|'E' and float suffix stuff look
                                        // like hex digits, hence the (...)+ doesn't
                                        // know when to stop: ambig.  ANTLR resolves
                                        // it correctly by matching immediately.  It
                                        // is therefor ok to hush warning.
                                        options {
                                                warnWhenFollowAmbig=false;
                                        }
                                :       HEX_DIGIT
                                )+
                        |       //float or double with leading zero
                                (('0'..'9')+ ('.'|EXPONENT|FLOAT_SUFFIX)) => ('0'..'9')+
                        |       ('0'..'7')+                                                                     // octal
                        )?
                |       ('1'..'9') ('0'..'9')*  {isDecimal=true;}               // non-zero decimal
                )
                (       ('l'|'L') { _ttype = NUM_LONG; }

                // only check to see if it's a float if looks like decimal so far
                |       {isDecimal}?
            (   '.' ('0'..'9')* (EXPONENT)? (f2:FLOAT_SUFFIX {t=f2;})?
            |   EXPONENT (f3:FLOAT_SUFFIX {t=f3;})?
            |   f4:FLOAT_SUFFIX {t=f4;}
            )
            {
                                        if ( t &&
                                                  (t->getText().find('f') != ANTLR_USE_NAMESPACE(std)string::npos ||
                                                        t->getText().find('F') != ANTLR_USE_NAMESPACE(std)string::npos ) ) {
                                                _ttype = NUM_FLOAT;
                                        }
                                        else {
                                                _ttype = NUM_DOUBLE; // assume double
                                        }
                                }
        )?
  )
        ;

// a couple protected methods to assist in matching floating point numbers
protected
EXPONENT
        :       ('e'|'E'|'d'|'D') ('+'|'-')? ('0'..'9')+
        ;

protected
FLOAT_SUFFIX
        :       'f'|'F'|'d'|'D'
        ;
Revision:	1902
Committed:	Tue Jul 16 17:16:45 2013 UTC (11 years, 10 months ago) by gezelter
File size:	11336 byte(s)
Log Message:	Added a satellites keyword to the inversion block.
#	Content
1	header
2	{
3
4	#include "antlr/CharScanner.hpp"
5	#include "utils/StringUtils.hpp"
6	#include "mdParser/FilenameObserver.hpp"
7	}
8
9	options
10	{
11	language = "Cpp";
12	}
13
14	class MDParser extends Parser;
15
16	options
17	{
18	k = 3;
19	exportVocab = MD;
20	buildAST = true;
21	codeGenMakeSwitchThreshold = 2;
22	codeGenBitsetTestThreshold = 3;
23
24	}
25
26	tokens
27	{
28	COMPONENT = "component";
29	MOLECULE = "molecule";
30	ZCONSTRAINT = "zconstraint";
31	RESTRAINT = "restraint";
32	ATOM = "atom";
33	BOND = "bond";
34	BEND = "bend";
35	TORSION = "torsion";
36	INVERSION = "inversion";
37	RIGIDBODY = "rigidBody";
38	CUTOFFGROUP = "cutoffGroup";
39	FRAGMENT = "fragment";
40	MEMBERS = "members";
41	CENTER = "center";
42	SATELLITES = "satellites";
43	POSITION = "position";
44	ORIENTATION = "orientation";
45	FLUCQ = "flucQ";
46	RNEMD = "RNEMD";
47	MINIMIZER = "minimizer";
48	ENDBLOCK;
49	}
50
51
52	mdfile : (statement)*
53	;
54
55	statement : assignment
56	\| componentblock
57	\| moleculeblock
58	\| zconstraintblock
59	\| restraintblock
60	\| flucqblock
61	\| rnemdblock
62	\| minimizerblock
63	;
64
65	assignment : ID ASSIGNEQUAL^ constant SEMICOLON!
66	;
67
68	constant : intConst
69	\| floatConst
70	\| vectorConst
71	\| ID
72	\| StringLiteral
73	;
74
75	componentblock : COMPONENT^ LCURLY! (assignment)* RCURLY {#RCURLY->setType(ENDBLOCK);}
76	;
77
78	zconstraintblock : ZCONSTRAINT^ LCURLY! (assignment)* RCURLY {#RCURLY->setType(ENDBLOCK);}
79	;
80
81	restraintblock : RESTRAINT^ LCURLY! (assignment)* RCURLY {#RCURLY->setType(ENDBLOCK);}
82	;
83
84	flucqblock : FLUCQ^ LCURLY! (assignment)* RCURLY {#RCURLY->setType(ENDBLOCK);}
85	;
86
87	rnemdblock : RNEMD^ LCURLY! (assignment)* RCURLY {#RCURLY->setType(ENDBLOCK);}
88	;
89
90	minimizerblock : MINIMIZER^ LCURLY! (assignment)* RCURLY {#RCURLY->setType(ENDBLOCK);}
91	;
92
93	moleculeblock : MOLECULE^ LCURLY! (moleculestatement)* RCURLY {#RCURLY->setType(ENDBLOCK);}
94	;
95
96	moleculestatement : assignment
97	\| atomblock
98	\| bondblock
99	\| bendblock
100	\| torsionblock
101	\| inversionblock
102	\| rigidbodyblock
103	\| cutoffgroupblock
104	\| fragmentblock
105	;
106
107	atomblock : ATOM^ LBRACKET! intConst RBRACKET! LCURLY! (atomstatement)* RCURLY {#RCURLY->setType(ENDBLOCK);}
108	;
109
110	atomstatement : assignment
111	\| POSITION^ LPAREN! doubleNumberTuple RPAREN! SEMICOLON!
112	\| ORIENTATION^ LPAREN! doubleNumberTuple RPAREN! SEMICOLON!
113	;
114
115
116	bondblock : BOND^ (LBRACKET! intConst! RBRACKET!)? LCURLY!(bondstatement)* RCURLY {#RCURLY->setType(ENDBLOCK);}
117	;
118
119	bondstatement : assignment
120	\| MEMBERS^ LPAREN! inttuple RPAREN! SEMICOLON!
121	;
122
123	bendblock : BEND^ (LBRACKET! intConst! RBRACKET!)? LCURLY! (bendstatement)* RCURLY {#RCURLY->setType(ENDBLOCK);}
124	;
125
126	bendstatement : assignment
127	\| MEMBERS^ LPAREN! inttuple RPAREN! SEMICOLON!
128	;
129
130	torsionblock : TORSION^ (LBRACKET! intConst! RBRACKET!)? LCURLY!(torsionstatement)* RCURLY {#RCURLY->setType(ENDBLOCK);}
131	;
132
133	torsionstatement : assignment
134	\| MEMBERS^ LPAREN! inttuple RPAREN! SEMICOLON!
135	;
136
137	inversionblock : INVERSION^ (LBRACKET! intConst! RBRACKET!)? LCURLY!(inversionstatement)* RCURLY {#RCURLY->setType(ENDBLOCK);}
138	;
139
140	inversionstatement : assignment
141	\| CENTER^ LPAREN! intConst RPAREN! SEMICOLON!
142	\| SATELLITES^ LPAREN! inttuple RPAREN! SEMICOLON!
143	;
144
145	rigidbodyblock : RIGIDBODY^ LBRACKET! intConst RBRACKET! LCURLY!(rigidbodystatement)* RCURLY {#RCURLY->setType(ENDBLOCK);}
146	;
147
148	rigidbodystatement : assignment
149	\| MEMBERS^ LPAREN! inttuple RPAREN! SEMICOLON!
150	;
151
152	cutoffgroupblock : CUTOFFGROUP^ (LBRACKET! intConst! RBRACKET!)? LCURLY! (cutoffgroupstatement)* RCURLY {#RCURLY->setType(ENDBLOCK);}
153	;
154
155	cutoffgroupstatement : assignment
156	\| MEMBERS^ LPAREN! inttuple RPAREN! SEMICOLON!
157	;
158
159	fragmentblock : FRAGMENT^ LBRACKET! intConst RBRACKET! LCURLY! (fragmentstatement)* RCURLY {#RCURLY->setType(ENDBLOCK);}
160	;
161
162	fragmentstatement : assignment
163	;
164
165
166
167	doubleNumberTuple : doubleNumber (COMMA! doubleNumber)*
168	;
169
170	inttuple : intConst (COMMA! intConst)*
171	;
172
173	protected
174	intConst
175	: NUM_INT \| NUM_LONG
176	;
177
178	protected
179	doubleNumber :
180	(intConst \| floatConst)
181	;
182
183	protected
184	floatConst
185	:
186	NUM_FLOAT \| NUM_DOUBLE
187	;
188
189	protected
190	vectorConst
191	:
192	LPAREN^ doubleNumber COMMA doubleNumber COMMA doubleNumber RPAREN
193	;
194
195	class MDLexer extends Lexer;
196
197	options
198	{
199	k = 3;
200	exportVocab = MD;
201	testLiterals = false;
202	}
203
204	tokens {
205	DOT;
206	}
207
208	{
209
210
211	int deferredLineCount;
212	FilenameObserver* observer;
213
214	public:
215	void setObserver(FilenameObserver* osv) {observer = osv;}
216	void initDeferredLineCount() { deferredLineCount = 0;}
217	void deferredNewline() {
218	deferredLineCount++;
219	}
220
221
222	virtual void newline() {
223	for (;deferredLineCount>0;deferredLineCount--) {
224	CharScanner::newline();
225	}
226	CharScanner::newline();
227	}
228
229	}
230
231
232	// Operators:
233
234	ASSIGNEQUAL : '=' ;
235	COLON : ':' ;
236	COMMA : ',' ;
237	QUESTIONMARK : '?' ;
238	SEMICOLON : ';' ;
239
240	LPAREN : '(' ;
241	RPAREN : ')' ;
242	LBRACKET : '[' ;
243	RBRACKET : ']' ;
244	LCURLY : '{' ;
245	RCURLY : '}' ;
246
247	Whitespace
248	:
249	( // whitespace ignored
250	(' ' \|'\t' \| '\f')
251	\| // handle newlines
252	( '\r' '\n' // MS
253	\| '\r' // Mac
254	\| '\n' // Unix
255	) { newline(); }
256	\| // handle continuation lines
257	( '\\' '\r' '\n' // MS
258	\| '\\' '\r' // Mac
259	\| '\\' '\n' // Unix
260	) {printf("CPP_parser.g continuation line detected\n");
261	deferredNewline();}
262	)
263	{_ttype = ANTLR_USE_NAMESPACE(antlr)Token::SKIP;}
264	;
265
266	Comment
267	:
268	"/*"
269	( {LA(2) != '/'}? '*'
270	\| EndOfLine {deferredNewline();}
271	\| ~('*'\| '\r' \| '\n')
272	)*
273	"*/" {_ttype = ANTLR_USE_NAMESPACE(antlr)Token::SKIP;}
274	;
275
276	CPPComment
277	:
278	"//" (~('\n' \| '\r'))* EndOfLine
279	{_ttype = ANTLR_USE_NAMESPACE(antlr)Token::SKIP; newline();}
280	;
281
282	PREPROC_DIRECTIVE
283	options{paraphrase = "a line directive";}
284	:
285	'#' LineDirective
286	{_ttype = ANTLR_USE_NAMESPACE(antlr)Token::SKIP; newline();}
287	;
288
289	protected
290	LineDirective
291	:
292	{
293	deferredLineCount = 0;
294	}
295	("line")? // this would be for if the directive started "#line"
296	(Space)+
297	n:Decimal { setLine(OpenMD::lexi_cast<int>(n->getText()) - 1); }
298	(Space)+
299	(sl:StringLiteral) {std::string filename = sl->getText().substr(1,sl->getText().length()-2); observer->notify(filename);}
300	((Space)+ Decimal)* // To support cpp flags (GNU)
301	EndOfLine
302	;
303
304	protected
305	Space
306	:
307	(' '\|'\t'\|'\f')
308	;
309
310
311	// Literals:
312
313	/*
314	* Note that we do NOT handle tri-graphs nor multi-byte sequences.
315	*/
316
317	/*
318	* Note that we can't have empty character constants (even though we
319	* can have empty strings :-).
320	*/
321	CharLiteral
322	:
323	'\'' (Escape \| ~('\'')) '\''
324	;
325
326	/*
327	* Can't have raw imbedded newlines in string constants. Strict reading of
328	* the standard gives odd dichotomy between newlines & carriage returns.
329	* Go figure.
330	*/
331	StringLiteral
332	:
333	'"'
334	( Escape
335	\|
336	( "\\\r\n" // MS
337	\| "\\\r" // MAC
338	\| "\\\n" // Unix
339	) {deferredNewline();}
340	\|
341	~('"'\|'\r'\|'\n'\|'\\')
342	)*
343	'"'
344	;
345
346	protected
347	EndOfLine
348	:
349	( options{generateAmbigWarnings = false;}:
350	"\r\n" // MS
351	\| '\r' // Mac
352	\| '\n' // Unix
353	)
354	;
355
356	/*
357	* Handle the various escape sequences.
358	*
359	* Note carefully that these numeric escape sequences are not of the
360	* same form as the C language numeric constants.
361	*
362	* There is no such thing as a binary numeric escape sequence.
363	*
364	* Octal escape sequences are either 1, 2, or 3 octal digits exactly.
365	*
366	* There is no such thing as a decimal escape sequence.
367	*
368	* Hexadecimal escape sequences are begun with a leading \x and continue
369	* until a non-hexadecimal character is found.
370	*
371	* No real handling of tri-graph sequences, yet.
372	*/
373
374	protected
375	Escape
376	:
377	'\\'
378	( options{warnWhenFollowAmbig=false;}:
379	'a'
380	\| 'b'
381	\| 'f'
382	\| 'n'
383	\| 'r'
384	\| 't'
385	\| 'v'
386	\| '"'
387	\| '\''
388	\| '\\'
389	\| '?'
390	\| ('0'..'3') (options{warnWhenFollowAmbig=false;}: Digit (options{warnWhenFollowAmbig=false;}: Digit)? )?
391	\| ('4'..'7') (options{warnWhenFollowAmbig=false;}: Digit)?
392	\| 'x' (options{warnWhenFollowAmbig=false;}: Digit \| 'a'..'f' \| 'A'..'F')+
393	)
394	;
395
396
397	protected
398	Vocabulary
399	:
400	'\3'..'\377'
401	;
402
403
404	ID
405	options {testLiterals = true;}
406	:
407	('a'..'z'\|'A'..'Z'\|'_')
408	('a'..'z'\|'A'..'Z'\|'_'\|'0'..'9')*
409	;
410
411
412	protected
413	Digit
414	:
415	'0'..'9'
416	;
417
418	protected
419	Decimal
420	:
421	('0'..'9')+
422	;
423
424	// hexadecimal digit (again, note it's protected!)
425	protected
426	HEX_DIGIT
427	: ('0'..'9'\|'A'..'F'\|'a'..'f')
428	;
429
430
431	// a numeric literal
432	NUM_INT
433	{
434	bool isDecimal = false;
435	ANTLR_USE_NAMESPACE(antlr)RefToken t = ANTLR_USE_NAMESPACE(antlr)nullToken;
436	}
437	: ('+' \| '-')?
438	(
439	'.' {_ttype = DOT;}
440	( ('0'..'9')+ (EXPONENT)? (f1:FLOAT_SUFFIX {t=f1;})?
441	{
442	if ( t &&
443	(t->getText().find('f') != ANTLR_USE_NAMESPACE(std)string::npos \|\|
444	t->getText().find('F') != ANTLR_USE_NAMESPACE(std)string::npos ) ) {
445	_ttype = NUM_FLOAT;
446	}
447	else {
448	_ttype = NUM_DOUBLE; // assume double
449	}
450	}
451	)?
452
453	\| ( '0' {isDecimal = true;} // special case for just '0'
454	( ('x'\|'X')
455	( // hex
456	// the 'e'\|'E' and float suffix stuff look
457	// like hex digits, hence the (...)+ doesn't
458	// know when to stop: ambig. ANTLR resolves
459	// it correctly by matching immediately. It
460	// is therefor ok to hush warning.
461	options {
462	warnWhenFollowAmbig=false;
463	}
464	: HEX_DIGIT
465	)+
466	\| //float or double with leading zero
467	(('0'..'9')+ ('.'\|EXPONENT\|FLOAT_SUFFIX)) => ('0'..'9')+
468	\| ('0'..'7')+ // octal
469	)?
470	\| ('1'..'9') ('0'..'9')* {isDecimal=true;} // non-zero decimal
471	)
472	( ('l'\|'L') { _ttype = NUM_LONG; }
473
474	// only check to see if it's a float if looks like decimal so far
475	\| {isDecimal}?
476	( '.' ('0'..'9')* (EXPONENT)? (f2:FLOAT_SUFFIX {t=f2;})?
477	\| EXPONENT (f3:FLOAT_SUFFIX {t=f3;})?
478	\| f4:FLOAT_SUFFIX {t=f4;}
479	)
480	{
481	if ( t &&
482	(t->getText().find('f') != ANTLR_USE_NAMESPACE(std)string::npos \|\|
483	t->getText().find('F') != ANTLR_USE_NAMESPACE(std)string::npos ) ) {
484	_ttype = NUM_FLOAT;
485	}
486	else {
487	_ttype = NUM_DOUBLE; // assume double
488	}
489	}
490	)?
491	)
492	;
493
494	// a couple protected methods to assist in matching floating point numbers
495	protected
496	EXPONENT
497	: ('e'\|'E'\|'d'\|'D') ('+'\|'-')? ('0'..'9')+
498	;
499
500	protected
501	FLOAT_SUFFIX
502	: 'f'\|'F'\|'d'\|'D'
503	;