CODEWITHSUNDEEP
javaantlrabstract-syntax-tree
eouti
eouti

Reputation: 5638

ANTLR : AST, Java

I am trying to generate AST after parsing a HTML file.

grammar XHTML2CSV;

options {
    output=AST;
    ASTLabelType=CommonTree;
}

tokens {
    CELLULE;
    LIGNE;
    CELLULEG    =  '<td>';                                              
    CELLULED    =  '</td>';
    DEBUTCOL    =  '<tr>';
    FINCOL      =  '</tr>';
    DTAB        =  '<table';
    STAB        =  ' align=\"center\"';
    FTAB        =  ' border=\"1\">';
    FINTAB      ='</table>';                                


ligne 
    : DEBUTCOL cellule+ FINCOL -> ^(LIGNE cellule);

cellule : CELLULEG CHAINE CELLULED            
        -> ^(CELLULE CHAINE);

And when I parse somthing like :

  <tr>
    <td>"Cellule 1"</td>
    <td>"Cellule 2"</td>
    <td>"Cellule 3"</td>
  </tr>

I just get the tree : nil ---> LIGNE ---> CELLULE ---> "Cellule 1"
How can I do to get all the children of LIGNE in the AST ?
Thanks

Upvotes: 0

Views: 492

Answers (1)

Bart Kiers
Bart Kiers

Reputation: 170128

It seems you forgot a + in your rewrite rule:

ligne 
  :  DEBUTCOL cellule+ FINCOL -> ^(LIGNE cellule+)
  ;                                       //    ^
                                          //    |
                                          //    +--- ici!

FYI: there's an HTML grammar on the ANTLR website: http://www.antlr.org/grammar/HTML

Upvotes: 1

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