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   1 lexer grammar XPathLexer;
   2
   3 tokens { TOKEN_REF, RULE_REF }
   4
   5 /*
   6 path : separator? word (separator word)* EOF ;
   7
   8 separator
   9         :       '/'  '!'
  10         |       '//' '!'
  11         |       '/'
  12         |       '//'
  13         ;
  14
  15 word:   TOKEN_REF
  16         |       RULE_REF
  17         |       STRING
  18         |       '*'
  19         ;
  20 */
  21
  22 ANYWHERE : '//' ;
  23 ROOT     : '/' ;
  24 WILDCARD : '*' ;
  25 BANG     : '!' ;
  26
  27 ID                      :       NameStartChar NameChar*
  28                                 {
  29                                 if (isupper(getText()[0]))
  30                                   setType(TOKEN_REF);
  31                                 else
  32                                   setType(RULE_REF);
  33                                 }
  34                         ;
  35
  36 fragment
  37 NameChar    :   NameStartChar
  38             |   '0'..'9'
  39             |   '_'
  40             |   '\u00B7'
  41             |   '\u0300'..'\u036F'
  42             |   '\u203F'..'\u2040'
  43             ;
  44
  45 fragment
  46 NameStartChar
  47             :   'A'..'Z' | 'a'..'z'
  48             |   '\u00C0'..'\u00D6'
  49             |   '\u00D8'..'\u00F6'
  50             |   '\u00F8'..'\u02FF'
  51             |   '\u0370'..'\u037D'
  52             |   '\u037F'..'\u1FFF'
  53             |   '\u200C'..'\u200D'
  54             |   '\u2070'..'\u218F'
  55             |   '\u2C00'..'\u2FEF'
  56             |   '\u3001'..'\uD7FF'
  57             |   '\uF900'..'\uFDCF'
  58             |   '\uFDF0'..'\uFFFF' // implicitly includes ['\u10000-'\uEFFFF]
  59             ;
  60
  61 STRING : '\'' .*? '\'';
  62
  63 //WS : [ \t\r\n]+ -> skip ;
  64