This is a modified version of the xml example from the ANTLR website.
Eventually I want to extract data from XHTML.
I probably just need a second to spot a simple mistake. I have the reference
book, not finished it yet, but did spend plenty of time on this and I am stuck.
error(100): XMLParser.g:29:11: syntax error: antlr:
NoViableAltException(72@[475:4: ( ( id ( ASSIGN | PLUS_ASSIGN ) ( atom | block
) ) (sub= ebnfSuffix[root_0,false] )? |a= atom (sub2= ebnfSuffix[$a.tree,false]
)? | ebnf | FORCED_ACTION | ACTION |p= SEMPRED ( IMPLIES )? |t3= tree_
)])error(100): XMLParser.g:29:11: syntax error: antlr:
NoViableAltException(72@[475:4: ( ( id ( ASSIGN | PLUS_ASSIGN ) ( atom | block
) ) (sub= ebnfSuffix[root_0,false] )? |a= atom (sub2= ebnfSuffix[$a.tree,false]
)? | ebnf | FORCED_ACTION | ACTION |p= SEMPRED ( IMPLIES )? |t3= tree_
)])error(100): XMLParser.g:0:1: syntax error: assign.types:
MismatchedTreeNodeException(0!=32)error(100): XMLParser.g:0:1: syntax error:
assign.types: MismatchedTreeNodeException(3!=33)error(100): XMLParser.g:0:1:
syntax error: assign.types: MismatchedTreeNodeException(3!=34)error(10):
internal error: XMLParser.g : System.InvalidCastException: Unable to cast
object of type 'Antlr.Runtime.Tree.CommonTree' to type 'Antlr
3.Tool.GrammarAST'.
parser grammar XMLParser;options{ language=CSharp3; tokenVocab=XMLLexer;}
@header {using System;}@namespace { XMLParserN }
document : element ;
element : startTag (element | PCDATA )* endTag
| emptyElement ;
startTag : TAG_START_OPEN GENERIC_ID {Console.Write(@"<" +
$GENERIC_ID.text); } (attribute {if $attribute.cl!=@"" then Console.Write(@"
class=\"" + $attribute.cl + @"\"");} )* TAG_CLOSE
{Console.Write(@">" + $GENERIC_ID.text); }
attribute returns [string cl] : GENERIC_ID ATTR_EQ ATTR_VALUE
{ if ($GENERIC_ID.text==@"class") $cl = $ATTR_VALUE.text else $cl = @""; } ;
endTag : TAG_END_OPEN GENERIC_ID TAG_CLOSE {Console.Write(@"</" +
$GENERIC_ID.text + @">"); };
emptyElement : TAG_START_OPEN GENERIC_ID (attribute)* TAG_EMPTY_CLOSE ;
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