xpathparser.y

linux下建立JAVA虚拟机的源码KAFFE

      $$ = list;
    }
  ;

/*predicate_list:
  predicate
    {
      List list = new ArrayList ();
      list.add ($1);
      $$ = list;
    }
  | predicate predicate_list
    {
      List list = (List) $3;
      list.add (0, $1);
      $$ = list;
    }
  ;*/

axis_name:
  ANCESTOR
    {
      $$ = new Integer(Selector.ANCESTOR);
    }
  | ANCESTOR_OR_SELF
    {
      $$ = new Integer(Selector.ANCESTOR_OR_SELF);
    }
  | ATTRIBUTE
    {
      $$ = new Integer(Selector.ATTRIBUTE);
    }
  | CHILD
    {
      $$ = new Integer(Selector.CHILD);
    }
  | DESCENDANT
    {
      $$ = new Integer(Selector.DESCENDANT);
    }
  | DESCENDANT_OR_SELF
    {
      $$ = new Integer(Selector.DESCENDANT_OR_SELF);
    }
  | FOLLOWING
    {
      $$ = new Integer(Selector.FOLLOWING);
    }
  | FOLLOWING_SIBLING
    {
      $$ = new Integer(Selector.FOLLOWING_SIBLING);
    }
  | NAMESPACE
    {
      $$ = new Integer(Selector.NAMESPACE);
    }
  | PARENT
    {
      $$ = new Integer(Selector.PARENT);
    }
  | PRECEDING
    {
      $$ = new Integer(Selector.PRECEDING);
    }
  | PRECEDING_SIBLING
    {
      $$ = new Integer(Selector.PRECEDING_SIBLING);
    }
  | SELF
    {
      $$ = new Integer(Selector.SELF);
    }
  ;

node_test:
  name_test
  /*| PROCESSING_INSTRUCTION LP LITERAL RP*/
  | PROCESSING_INSTRUCTION LITERAL RP
    {
      $$ = new NodeTypeTest(Node.PROCESSING_INSTRUCTION_NODE, (String) $2);
    }
  /*| node_type LP RP*/
  | node_type RP
    {
      $$ = new NodeTypeTest(((Short) $1).shortValue());
    }
  ;

predicate:
  LB expr RB
    {
      $$ = new Predicate((Expr) $2);
    }
  ;

primary_expr:
  variable_reference
  | LP expr RP
    {
      $$ = new ParenthesizedExpr((Expr) $2);
    }
  | LITERAL
    {
      $$ = new Constant($1);
    }
  | number
    {
      $$ = new Constant($1);
    }
  | function_call
  ;

function_call:
  function_name LP RP
    {
      $$ = lookupFunction((String) $1, Collections.EMPTY_LIST);
    }
  | function_name LP argument_list RP
    {
      $$ = lookupFunction((String) $1, (List) $3);
    }
  ;

argument_list:
  expr
    {
      List list = new ArrayList();
      list.add($1);
      $$ = list;
    }
  | expr COMMA argument_list
    {
      List list = (List) $3;
      list.add(0, $1);
      $$ = list;
    }
  ;

union_expr:
  path_expr
  | union_expr PIPE path_expr
    {
      $$ = new UnionExpr((Expr) $1, (Expr) $3);
    }
  ;

path_expr:
  location_path
  | filter_expr
  | filter_expr SLASH relative_location_path
    {
      Steps steps;
      if ($3 instanceof Steps)
        {
          steps = (Steps) $3;
        }
      else
        {
          steps = new Steps();
          steps.path.addFirst($3);
        }
      steps.path.addFirst($1);
      $$ = steps;
      //$$ = new Step ((Expr) $1, (Path) $3);
    }
  | filter_expr DOUBLE_SLASH relative_location_path
    {
      Test nt = new NodeTypeTest((short) 0);
      Selector s = new Selector(Selector.DESCENDANT_OR_SELF,
                                Collections.singletonList(nt));
      Steps steps;
      if ($3 instanceof Steps)
        {
          steps = (Steps) $3;
        }
      else
        {
          steps = new Steps();
          steps.path.addFirst($3);
        }
      steps.path.addFirst(s);
      steps.path.addFirst($1);
      $$ = steps;
      //Step step = new Step (s, (Path) $3);
      //$$ = new Step ((Expr) $1, step);
    }
  ;

filter_expr:
  primary_expr
  | filter_expr predicate
    {
      Predicate filter = (Predicate) $2;
      Selector s = new Selector(Selector.SELF,
                                Collections.singletonList(filter));
      Steps steps;
      if ($1 instanceof Steps)
        {
          steps = (Steps) $1;
        }
      else
        {
          steps = new Steps();
          steps.path.addFirst($1);
        }
      steps.path.addLast(s);
      $$ = steps;
      //$$ = new Step ((Expr) $1, s);
    }
  ;

or_expr:
  and_expr
  | or_expr OR and_expr
    {
      $$ = new OrExpr((Expr) $1, (Expr) $3);
    }
  ;

and_expr:
  equality_expr
  | and_expr AND equality_expr
    {
      $$ = new AndExpr((Expr) $1, (Expr) $3);
    }
  ;

equality_expr:
  relational_expr
  | equality_expr EQ relational_expr
    {
      $$ = new EqualityExpr((Expr) $1, (Expr) $3, false);
    }
  | equality_expr NE relational_expr
    {
      $$ = new EqualityExpr((Expr) $1, (Expr) $3, true);
    }
  ;

relational_expr:
  additive_expr
  | relational_expr LT additive_expr
    {
      $$ = new RelationalExpr((Expr) $1, (Expr) $3, true, false);
    }
  | relational_expr GT additive_expr
    {
      $$ = new RelationalExpr((Expr) $1, (Expr) $3, false, false);
    }
  | relational_expr LTE additive_expr
    {
      $$ = new RelationalExpr((Expr) $1, (Expr) $3, true, true);
    }
  | relational_expr GTE additive_expr
    {
      $$ = new RelationalExpr((Expr) $1, (Expr) $3, false, true);
    }
  ;

additive_expr:
  multiplicative_expr
  | additive_expr PLUS multiplicative_expr
    {
      $$ = new ArithmeticExpr((Expr) $1, (Expr) $3, ArithmeticExpr.ADD);
    }
  | additive_expr MINUS multiplicative_expr
    {
      $$ = new ArithmeticExpr((Expr) $1, (Expr) $3, ArithmeticExpr.SUBTRACT);
    }
  ;

multiplicative_expr:
  unary_expr
  | multiplicative_expr STAR unary_expr
    {
      $$ = new ArithmeticExpr((Expr) $1, (Expr) $3, ArithmeticExpr.MULTIPLY);
    }
  | multiplicative_expr DIV unary_expr
    {
      $$ = new ArithmeticExpr((Expr) $1, (Expr) $3, ArithmeticExpr.DIVIDE);
    }
  | multiplicative_expr MOD unary_expr
    {
      $$ = new ArithmeticExpr((Expr) $1, (Expr) $3, ArithmeticExpr.MODULO);
    }
  ;

unary_expr:
  union_expr
  | MINUS unary_expr %prec UNARY
    {
      $$ = new NegativeExpr((Expr) $2);
    }
  ;

number:
  DIGITS
    {
      $$ = new Double((String) $1 + ".0");
    }
  | DIGITS DOT
    {
      $$ = new Double((String) $1 + ".0");
    }
  | DIGITS DOT DIGITS
    {
      $$ = new Double((String) $1 + "." + (String) $3);
    }
  | DOT DIGITS
    {
      $$ = new Double("0." + (String) $2);
    }
  ;

function_name:
  qname
/*  | node_type
    {
      switch (((Short) $1).shortValue ())
        {
        case Node.COMMENT_NODE:
          $$ = "comment";
          break;
        case Node.TEXT_NODE:
          $$ = "text";
          break;
        case Node.PROCESSING_INSTRUCTION_NODE:
          $$ = "processing-instruction";
          break;
        default:
          $$ = "node";
          break;
        }
    }*/
  ;

variable_reference:
  DOLLAR qname
    {
      String name = (String) $2;
      $$ = new VariableReference(variableResolver, getQName(name));
    }
  ;

name_test:
  STAR
    {
      $$ = new NameTest(null, true, true);
    }
  | NAME COLON STAR
    {
      QName qName = getQName((String) $1);
      $$ = new NameTest(qName, true, false);
    }
  | qname
    {
      QName qName = getQName((String) $1);
      $$ = new NameTest(qName, false, false);
    }
  ;

qname:
  NAME
  | NAME COLON NAME
    {
      $$ = (String) $1 + ':' + (String) $3;
    }
  ;

node_type:
  COMMENT
    {
      $$ = new Short(Node.COMMENT_NODE);
    }
  | TEXT
    {
      $$ = new Short(Node.TEXT_NODE);
    }
  | PROCESSING_INSTRUCTION
    {
      $$ = new Short(Node.PROCESSING_INSTRUCTION_NODE);
    }
  | NODE
    {
      $$ = new Short((short) 0);
    }
  ;

%%

}