options {
  STATIC = false;
  JAVA_UNICODE_ESCAPE = true;
}

PARSER_BEGIN(Parser)
import java.io.PrintStream;
import edu.neu.ccs.demeter.*;
public class Parser { 
  // oit is uugly.  Why isn't there a Character.valueOf(String)? 
  static char unescapifyChar(String s) { 
    char c = s.charAt(0); 
    if (c == '\\') { 
      switch (s.charAt(1)) { 
      case 'n': c = '\n'; break; 
      case 't': c = '\t'; break; 
      case 'b': c = '\b'; break; 
      case 'r': c = '\r'; break; 
      case 'f': c = '\f'; break; 
      case '\\': c = '\\'; break; 
      case '\'': c = '\''; break; 
      case '\"': c = '\"'; break; 
      default: 
       c = (char) Integer.parseInt(s.substring(1, s.length()), 8); 
       break; 
      } 
    } 
    return c; 
  } 
  // Even uglier... 
  static String unescapify(String s) { 
    char str[] = new char[s.length()]; 
    int i = 0, o = 0; 
    while (i < s.length()) { 
      char c = s.charAt(i++); 
      if (c == '\\') { 
       int j = i + 1; 
       while (j < s.length() && 
              Character.digit(s.charAt(j), 8) != -1) { 
         j++; 
       } 
       c = unescapifyChar(s.substring(i-1, j)); 
       i = j; 
      } 
      str[o++] = c; 
    } 
    return String.valueOf(str, 0, o); 
  } 
} 

PARSER_END(Parser)

Program _Program() : {
  Program it = null;
  Expression_List _exps;
} {
  { it=new Program(); }
  "<program>"  _exps=_Expression_List() { it.set_exps(_exps); }
  "</program>"  <EOF>
  { return it; }
}

Expression _Expression() : {
  Expression it = null;
} {
  ( it=_LetExp() | it=_CNF() )
  { return it; }
}

void common_Expression(Expression it) : {
} {
  { }
}

LetExp _LetExp() : {
  LetExp it = null;
  Literal _assignment;
  Expression _body;
} {
  { it=new LetExp(); }
  "<let>"  "<assignment>"  _assignment=_Literal() { it.set_assignment(_assignment); }
  "</assignment>"  _body=_Expression() { it.set_body(_body); }
  "</let>"  common_Expression(it)
  { return it; }
}

CNF _CNF() : {
  CNF it = null;
  CNFType _cnftype;
  Clause_List _clauses;
  ClauseCount _sat;
  ClauseCount _unsat;
} {
  { it=new CNF(); }
  "<cnf>"  [  _cnftype=_CNFType() { it.set_cnftype(_cnftype); }  ]
  "<clauses>"  _clauses=_Clause_List() { it.set_clauses(_clauses); }
  "</clauses>"  [  "<sat>"  _sat=_ClauseCount() { it.set_sat(_sat); }  "</sat>"  ]
  [  "<unsat>"  _unsat=_ClauseCount() { it.set_unsat(_unsat); }  "</unsat>"  ]
  "</cnf>"  common_Expression(it)
  { return it; }
}

CNFType _CNFType() : {
  CNFType it = null;
  ClauseType_List _clausetype_list;
} {
  { it=new CNFType(); }
  "<CNFType>"  _clausetype_list=_ClauseType_List() { it.set_clausetype_list(_clausetype_list); }
  "</CNFType>"  { return it; }
}

ClauseType _ClauseType() : {
  ClauseType it = null;
  ClauseLength _length;
  ClauseLength _pos;
} {
  { it=new ClauseType(); }
  "<clauseType"  "length"  "="  _length=_ClauseLength() { it.set_length(_length); }
  "positive"  "="  _pos=_ClauseLength() { it.set_pos(_pos); }
  "/>"  { return it; }
}

Clause _Clause() : {
  Clause it = null;
  Weight _weight;
  Literals _literals;
} {
  { it=new Clause(); }
  "<clause"  "weight"  "="  _weight=_Weight() { it.set_weight(_weight); }
  ">"  _literals=_Literals() { it.set_literals(_literals); }
  "</clause>"  { return it; }
}

Literals _Literals() : {
  Literals it = null;
  Literal_List _literals;
} {
  { it=new Literals(); }
  "<literals>"  _literals=_Literal_List() { it.set_literals(_literals); }
  "</literals>"  { return it; }
}

Literal _Literal() : {
  Literal it = null;
} {
  ( it=_Pos() | it=_Neg() )
  { return it; }
}

void common_Literal(Literal it) : {
} {
  { }
}

Pos _Pos() : {
  Pos it = null;
  Variable _variable;
} {
  { it=new Pos(); }
  "<pos>"  _variable=_Variable() { it.set_variable(_variable); }
  "</pos>"  common_Literal(it)
  { return it; }
}

Neg _Neg() : {
  Neg it = null;
  Variable _variable;
} {
  { it=new Neg(); }
  "<neg>"  _variable=_Variable() { it.set_variable(_variable); }
  "</neg>"  common_Literal(it)
  { return it; }
}

Variable _Variable() : {
  Variable it = null;
  Ident _v;
} {
  { it=new Variable(); }
  _v=_Ident() { it.set_v(_v); }
  { return it; }
}

Weight _Weight() : {
  Weight it = null;
  String _v;
} {
  { it=new Weight(); }
  _v=_String() { it.set_v(_v); }
  { return it; }
}

ClauseCount _ClauseCount() : {
  ClauseCount it = null;
  int _v;
} {
  { it=new ClauseCount(); }
  "<clausecount>"  _v=_int() { it.set_v(_v); }
  "</clausecount>"  { return it; }
}

ClauseLength _ClauseLength() : {
  ClauseLength it = null;
  String _v;
} {
  { it=new ClauseLength(); }
  _v=_String() { it.set_v(_v); }
  { return it; }
}

Main _Main() : {
  Main it = null;
  String _s;
} {
  { it=new Main(); }
  _s=_String() { it.set_s(_s); }
  { return it; }
}

Expression_List _Expression_List() : {
  Expression_List it = null;
  Nonempty_Expression_List _first;
} {
  { it=new Expression_List(); }
  [  _first=_Nonempty_Expression_List() { it.set_first(_first); }  ]
  { return it; }
}

Clause_List _Clause_List() : {
  Clause_List it = null;
  Nonempty_Clause_List _first;
} {
  { it=new Clause_List(); }
  [  _first=_Nonempty_Clause_List() { it.set_first(_first); }  ]
  { return it; }
}

ClauseType_List _ClauseType_List() : {
  ClauseType_List it = null;
  Nonempty_ClauseType_List _first;
} {
  { it=new ClauseType_List(); }
  [  _first=_Nonempty_ClauseType_List() { it.set_first(_first); }  ]
  { return it; }
}

Literal_List _Literal_List() : {
  Literal_List it = null;
  Nonempty_Literal_List _first;
} {
  { it=new Literal_List(); }
  [  _first=_Nonempty_Literal_List() { it.set_first(_first); }  ]
  { return it; }
}

Nonempty_Expression_List _Nonempty_Expression_List() : {
  Nonempty_Expression_List it = null;
  Expression _it;
  Nonempty_Expression_List _next;
} {
  { it=new Nonempty_Expression_List(); }
  _it=_Expression() { it.set_it(_it); }
  [  _next=_Nonempty_Expression_List() { it.set_next(_next); }  ]
  { return it; }
}

Nonempty_Clause_List _Nonempty_Clause_List() : {
  Nonempty_Clause_List it = null;
  Clause _it;
  Nonempty_Clause_List _next;
} {
  { it=new Nonempty_Clause_List(); }
  _it=_Clause() { it.set_it(_it); }
  [  _next=_Nonempty_Clause_List() { it.set_next(_next); }  ]
  { return it; }
}

Nonempty_ClauseType_List _Nonempty_ClauseType_List() : {
  Nonempty_ClauseType_List it = null;
  ClauseType _it;
  Nonempty_ClauseType_List _next;
} {
  { it=new Nonempty_ClauseType_List(); }
  _it=_ClauseType() { it.set_it(_it); }
  [  _next=_Nonempty_ClauseType_List() { it.set_next(_next); }  ]
  { return it; }
}

Nonempty_Literal_List _Nonempty_Literal_List() : {
  Nonempty_Literal_List it = null;
  Literal _it;
  Nonempty_Literal_List _next;
} {
  { it=new Nonempty_Literal_List(); }
  _it=_Literal() { it.set_it(_it); }
  [  _next=_Nonempty_Literal_List() { it.set_next(_next); }  ]
  { return it; }
}


boolean _boolean() : { Token t; }{
  ( t=<TRUE> { return true; }
  | t=<FALSE> { return false; }
  )
}

char _char() : { Token t; } {
    t=<CHARACTER_LITERAL> { 
       String s = t.image; 
       return unescapifyChar(s.substring(1, s.length()-1)); 
    } 
} 

byte _byte() : { int i; } 
{ i=_int() { return (byte) i; } } 

short _short() : { int i; } 
{ i=_int() { return (short) i; } } 

int _int() : { Number num; } 
{ num=_Number() { return num.intValue(); } } 

long _long() : { Number num; } 
{ num=_Number() { return num.longValue(); } } 

float _float() : { Number num; } 
{ num=_Number() { return num.floatValue(); } } 

double _double() : { Number num; } 
{ num=_Number() { return num.doubleValue(); } } 

Boolean _Boolean() : { Token t; }{
  ( t=<TRUE> { return Boolean.TRUE; }
  | t=<FALSE> { return Boolean.FALSE; }
  )
}

Character _Character() : { char c; } 
{ c=_char() { return new Character(c); } }

Integer _Integer() : { int i; } 
{ i = _int() { return new Integer(i); } }

Long _Long() : { long l; } 
{ l=_long() { return new Long(l); } } 

Float _Float() : { float f; } 
{ f=_float() { return new Float(f); } } 

Double _Double() : { double d; } 
{ d=_double() { return new Double(d); } } 

Number _Number() : 
{
    Token t; 
    String s = null; 
    int radix = 0; 
    Number num = null; 
} {
  ( 
    ( t=<DECIMAL_LITERAL> { 
       s = t.image; 
       radix = 10; 
      } 
    | t=<HEX_LITERAL> { 
       // Strip off the "0x". 
       s = t.image.substring(2, t.image.length()); 
       radix = 16; 
      } 
    | t=<OCTAL_LITERAL> { 
       s = t.image; 
       radix = 8; 
      } 
    ) { 
       switch (s.charAt(s.length()-1)) { 
       case 'l': case 'L': 
         s = s.substring(0, s.length()-1);
         num = new Long(new java.math.BigInteger(s, radix).longValue());
         break; 
       default: 
         num = new Integer(new java.math.BigInteger(s, radix).intValue());
         break; 
       } 
    } 
  | t=<FLOATING_POINT_LITERAL> { 
       s = t.image; 
       switch (s.charAt(s.length()-1)) { 
       case 'd': case 'D': 
           num = Double.valueOf(s.substring(0, s.length()-1)); 
           break; 
       case 'f': case 'F': 
           num = Float.valueOf(s.substring(0, s.length()-1)); 
           break; 
       default: 
           num = Float.valueOf(s); 
           break; 
       } 
    } 
  ) { return num; } 
} 

String _String() : { Token t; } {
    t=<STRING_LITERAL> { 
       String s = t.image; 
       return unescapify(s.substring(1, s.length()-1)); 
    } 
} 

StringBuffer _StringBuffer() : { String s; } 
{ s=_String() { return new StringBuffer(s); } }

Ident _Ident() : { Token t; } {
    t=<IDENTIFIER> { 
       return new Ident(t.image); 
    } 
} 

Text _Text() : { Token t; } {
    t=<TEXT_LITERAL> { 
       String s = t.image; 
       return new Text(s.substring(2, s.length()-2)); 
    } 
} 

Line _Line() : { Token t; } {
    { token_source.SwitchTo(1); } 
    t=<LINE> { 
       return new Line(t.image); 
    } 
} 

Word _Word() : { Token t; } {
    { token_source.SwitchTo(2); } 
    t=<WORD> { 
       return new Word(t.image); 
    } 
} 

// Lexical specification (largely taken from Java.jack): 

SKIP : {
  " " 
| "\t" 
| "\n" 
| "\r" 
| <"//" (~["\n","\r"])* ("\n"|"\r\n")> 
| <"/*" (~["*"])* "*" (~["/"] (~["*"])* "*")* "/"> 
} 
 
TOKEN : { /* LITERALS */
  < DECIMAL_LITERAL: ["1"-"9"] (["0"-"9"])* (["l","L"])? > 
| 
  < HEX_LITERAL: "0" ["x","X"] (["0"-"9","a"-"f","A"-"F"])+ (["l","L"])? > 
| 
  < OCTAL_LITERAL: "0" (["0"-"7"])* (["l","L"])? > 
| 
  < FLOATING_POINT_LITERAL: 
        (["0"-"9"])+ "." (["0"-"9"])+ (<EXPONENT>)? (["f","F","d","D"])? 
      | "." (["0"-"9"])+ (<EXPONENT>)? (["f","F","d","D"])? 
      | (["0"-"9"])+ <EXPONENT> (["f","F","d","D"])? 
      | (["0"-"9"])+ (<EXPONENT>)? ["f","F","d","D"] 
  > 
| 
  < #EXPONENT: ["e","E"] (["+","-"])? (["0"-"9"])+ > 
| 
  < CHARACTER_LITERAL: 
      "'" 
      (   (~["\'","\\","\n","\r"]) 
        | ("\\" 
            ( ["n","t","b","r","f","\\","\'","\""] 
            | ["0"-"7"] ( ["0"-"7"] )? 
            | ["0"-"3"] ["0"-"7"] ["0"-"7"] 
            ) 
          ) 
      ) 
      "'" 
  >   
| 
  < STRING_LITERAL: 
      "\"" 
      (   (~["\"","\\","\n","\r"]) 
        | ("\\" 
            ( ["n","t","b","r","f","\\","\'","\""] 
            | ["0"-"7"] ( ["0"-"7"] )? 
            | ["0"-"3"] ["0"-"7"] ["0"-"7"] 
            ) 
          ) 
      )* 
      "\"" 
  > 
| 
  < TEXT_LITERAL: 
     ( "(@" 
           (~["@"])* 
           ( "@" ~[")"] 
             (~["@"])* 
           )* 
      "@)" ) 
    | ( "{{" 
           (~["}"])* 
           ( "}" ~["}"] 
             (~["}"])* 
           )* 
      "}}" ) 
  > 
| 
  < TRUE: "true" >
| 
  < FALSE: "false" >
} 

TOKEN : { /* IDENTIFIERS */ 
  < IDENTIFIER: <LETTER> (<LETTER>|<DIGIT>)* >
|
  < #LETTER:
      [
       "\u0024",
       "\u0041"-"\u005a",
       "\u005f",
       "\u0061"-"\u007a",
       "\u00c0"-"\u00d6",
       "\u00d8"-"\u00f6",
       "\u00f8"-"\u00ff",
       "\u0100"-"\u1fff",
       "\u3040"-"\u318f",
       "\u3300"-"\u337f",
       "\u3400"-"\u3d2d",
       "\u4e00"-"\u9fff",
       "\uf900"-"\ufaff"
      ]
  >
|
  < #DIGIT:
      [
       "\u0030"-"\u0039",
       "\u0660"-"\u0669",
       "\u06f0"-"\u06f9",
       "\u0966"-"\u096f",
       "\u09e6"-"\u09ef",
       "\u0a66"-"\u0a6f",
       "\u0ae6"-"\u0aef",
       "\u0b66"-"\u0b6f",
       "\u0be7"-"\u0bef",
       "\u0c66"-"\u0c6f",
       "\u0ce6"-"\u0cef",
       "\u0d66"-"\u0d6f",
       "\u0e50"-"\u0e59",
       "\u0ed0"-"\u0ed9",
       "\u1040"-"\u1049"
      ]
  >
}

<Line> TOKEN : {
  < LINE: (~["\n","\r"])* > : DEFAULT
}

<Word> SKIP :  { " " | "\t" | "\n" | "\r" }
<Word> TOKEN : {
  < WORD: (~[" ","\t","\n","\r"])* > : DEFAULT
}