First commit

runtime-linux/antlr4-runtime/tree/xpath/XPathLexer.g4

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+lexer grammar XPathLexer;
+
+tokens { TOKEN_REF, RULE_REF }
+
+/*
+path : separator? word (separator word)* EOF ;
+
+separator
+	:	'/'  '!'
+	|	'//' '!'
+	|	'/'
+	|	'//'
+	;
+
+word:	TOKEN_REF
+	|	RULE_REF
+	|	STRING
+	|	'*'
+	;
+*/
+
+ANYWHERE : '//' ;
+ROOT	 : '/' ;
+WILDCARD : '*' ;
+BANG	 : '!' ;
+
+ID			:	NameStartChar NameChar*
+				{
+				if (isupper(getText()[0]))
+				  setType(TOKEN_REF);
+				else
+				  setType(RULE_REF);
+				}
+			;
+
+fragment
+NameChar    :   NameStartChar
+            |   '0'..'9'
+            |   '_'
+            |   '\u00B7'
+            |   '\u0300'..'\u036F'
+            |   '\u203F'..'\u2040'
+            ;
+
+fragment
+NameStartChar
+            :   'A'..'Z' | 'a'..'z'
+            |   '\u00C0'..'\u00D6'
+            |   '\u00D8'..'\u00F6'
+            |   '\u00F8'..'\u02FF'
+            |   '\u0370'..'\u037D'
+            |   '\u037F'..'\u1FFF'
+            |   '\u200C'..'\u200D'
+            |   '\u2070'..'\u218F'
+            |   '\u2C00'..'\u2FEF'
+            |   '\u3001'..'\uD7FF'
+            |   '\uF900'..'\uFDCF'
+            |   '\uFDF0'..'\uFFFF' // implicitly includes ['\u10000-'\uEFFFF]
+            ;
+
+STRING : '\'' .*? '\'';
+
+//WS : [ \t\r\n]+ -> skip ;
+