options {
  STATIC = false;
  JAVA_UNICODE_ESCAPE = true;
}

PARSER_BEGIN(Parser)
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)

TraversalPaths _TraversalPaths() : {
  TraversalPaths it = null;
  TraceMatch_List _tracematch_list;
} {
  { it=new TraversalPaths(); }
  _tracematch_list=_TraceMatch_List() { it.set_tracematch_list(_tracematch_list); }
  { return it; }
}

TraceMatch _TraceMatch() : {
  TraceMatch it = null;
  VariableDeclaration_CList _decls;
  Symbol_List _SymbolDeclaration;
  RegEx _regex;
} {
  { it=new TraceMatch(); }
  "tracematch"  "("  [  _decls=_VariableDeclaration_CList() { it.set_decls(_decls); }  ]
  ")"  _SymbolDeclaration=_Symbol_List() { it.set_SymbolDeclaration(_SymbolDeclaration); }
  _regex=_RegEx() { it.set_regex(_regex); }
  { return it; }
}

VariableDeclaration _VariableDeclaration() : {
  VariableDeclaration it = null;
  NodeName _nodename;
  VariableName _variablename;
} {
  { it=new VariableDeclaration(); }
  _nodename=_NodeName() { it.set_nodename(_nodename); }
  _variablename=_VariableName() { it.set_variablename(_variablename); }
  { return it; }
}

Symbol _Symbol() : {
  Symbol it = null;
  Name _name;
  Kind _kind;
  SelectorExp _selectorexp;
} {
  { it=new Symbol(); }
  "sym"  _name=_Name() { it.set_name(_name); }
  _kind=_Kind() { it.set_kind(_kind); }
  ":"  _selectorexp=_SelectorExp() { it.set_selectorexp(_selectorexp); }
  ";"  { return it; }
}

Kind _Kind() : {
  Kind it = null;
} {
  ( it=_Before() | it=_After() )
  { return it; }
}

void common_Kind(Kind it) : {
} {
  { }
}

Before _Before() : {
  Before it = null;
} {
  { it=new Before(); }
  "before"  common_Kind(it)
  { return it; }
}

After _After() : {
  After it = null;
} {
  { it=new After(); }
  "after"  common_Kind(it)
  { return it; }
}

SelectorExp _SelectorExp() : {
  SelectorExp it = null;
} {
  ( it=_Simple() | it=_Compound() )
  { return it; }
}

void common_SelectorExp(SelectorExp it) : {
} {
  { }
}

Simple _Simple() : {
  Simple it = null;
} {
  ( it=_NodeVisit() | it=_Target() | it=_This() )
  { return it; }
}

void common_Simple(Simple it) : {
} {
  common_SelectorExp(it)
  { }
}

NodeVisit _NodeVisit() : {
  NodeVisit it = null;
  NodeName _nodename;
} {
  { it=new NodeVisit(); }
  "visit"  "("  _nodename=_NodeName() { it.set_nodename(_nodename); }
  ")"  common_Simple(it)
  { return it; }
}

Target _Target() : {
  Target it = null;
  VariableName _variablename;
} {
  { it=new Target(); }
  "target"  "("  _variablename=_VariableName() { it.set_variablename(_variablename); }
  ")"  common_Simple(it)
  { return it; }
}

This _This() : {
  This it = null;
  VariableName _variablename;
} {
  { it=new This(); }
  "this"  "("  _variablename=_VariableName() { it.set_variablename(_variablename); }
  ")"  common_Simple(it)
  { return it; }
}

Compound _Compound() : {
  Compound it = null;
  Op _op;
  SelectorExp_List _args;
} {
  { it=new Compound(); }
  "("  _op=_Op() { it.set_op(_op); }
  _args=_SelectorExp_List() { it.set_args(_args); }
  ")"  common_SelectorExp(it)
  { return it; }
}

Op _Op() : {
  Op it = null;
} {
  ( it=_Union() | it=_Intersection() )
  { return it; }
}

void common_Op(Op it) : {
} {
  { }
}

Union _Union() : {
  Union it = null;
} {
  { it=new Union(); }
  "|"  common_Op(it)
  { return it; }
}

Intersection _Intersection() : {
  Intersection it = null;
} {
  { it=new Intersection(); }
  "&"  common_Op(it)
  { return it; }
}

RegEx _RegEx() : {
  RegEx it = null;
} {
  { it=new RegEx(); }
  "regex"  { return it; }
}

Name _Name() : {
  Name it = null;
  Ident _ident;
} {
  { it=new Name(); }
  _ident=_Ident() { it.set_ident(_ident); }
  { return it; }
}

NodeName _NodeName() : {
  NodeName it = null;
  Ident _ident;
} {
  { it=new NodeName(); }
  _ident=_Ident() { it.set_ident(_ident); }
  { return it; }
}

MethodName _MethodName() : {
  MethodName it = null;
  Ident _ident;
} {
  { it=new MethodName(); }
  _ident=_Ident() { it.set_ident(_ident); }
  { return it; }
}

VariableName _VariableName() : {
  VariableName it = null;
  Ident _ident;
} {
  { it=new VariableName(); }
  _ident=_Ident() { it.set_ident(_ident); }
  { return it; }
}

Main _Main() : {
  Main it = null;
} {
  { it=new Main(); }
  { return it; }
}

TraceMatch_List _TraceMatch_List() : {
  TraceMatch_List it = null;
  Nonempty_TraceMatch_List _first;
} {
  { it=new TraceMatch_List(); }
  [  _first=_Nonempty_TraceMatch_List() { it.set_first(_first); }  ]
  { return it; }
}

VariableDeclaration_CList _VariableDeclaration_CList() : {
  VariableDeclaration_CList it = null;
  Nonempty_VariableDeclaration_CList _first;
} {
  { it=new VariableDeclaration_CList(); }
  _first=_Nonempty_VariableDeclaration_CList() { it.set_first(_first); }
  { return it; }
}

Symbol_List _Symbol_List() : {
  Symbol_List it = null;
  Nonempty_Symbol_List _first;
} {
  { it=new Symbol_List(); }
  [  _first=_Nonempty_Symbol_List() { it.set_first(_first); }  ]
  { return it; }
}

SelectorExp_List _SelectorExp_List() : {
  SelectorExp_List it = null;
  Nonempty_SelectorExp_List _first;
} {
  { it=new SelectorExp_List(); }
  [  _first=_Nonempty_SelectorExp_List() { it.set_first(_first); }  ]
  { return it; }
}

Nonempty_TraceMatch_List _Nonempty_TraceMatch_List() : {
  Nonempty_TraceMatch_List it = null;
  TraceMatch _it;
  Nonempty_TraceMatch_List _next;
} {
  { it=new Nonempty_TraceMatch_List(); }
  _it=_TraceMatch() { it.set_it(_it); }
  [  _next=_Nonempty_TraceMatch_List() { it.set_next(_next); }  ]
  { return it; }
}

Nonempty_VariableDeclaration_CList _Nonempty_VariableDeclaration_CList() : {
  Nonempty_VariableDeclaration_CList it = null;
  VariableDeclaration _it;
  Nonempty_VariableDeclaration_CList _next;
} {
  { it=new Nonempty_VariableDeclaration_CList(); }
  _it=_VariableDeclaration() { it.set_it(_it); }
  [  ","  _next=_Nonempty_VariableDeclaration_CList() { it.set_next(_next); }  ]
  { return it; }
}

Nonempty_Symbol_List _Nonempty_Symbol_List() : {
  Nonempty_Symbol_List it = null;
  Symbol _it;
  Nonempty_Symbol_List _next;
} {
  { it=new Nonempty_Symbol_List(); }
  _it=_Symbol() { it.set_it(_it); }
  [  _next=_Nonempty_Symbol_List() { it.set_next(_next); }  ]
  { return it; }
}

Nonempty_SelectorExp_List _Nonempty_SelectorExp_List() : {
  Nonempty_SelectorExp_List it = null;
  SelectorExp _it;
  Nonempty_SelectorExp_List _next;
} {
  { it=new Nonempty_SelectorExp_List(); }
  _it=_SelectorExp() { it.set_it(_it); }
  [  _next=_Nonempty_SelectorExp_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
}