Examples of org.antlr.runtime3_3_0.tree.TreeNodeStream.LT()

Class org.antlr.runtime3_3_0.tree.TreeNodeStream

Examples of org.antlr.runtime3_3_0.tree.TreeNodeStream.LT()

org.antlr.runtime3_3_0.tree.TreeNodeStream.LT()
Get tree node at current input pointer + i ahead where i=1 is next node. i<0 indicates nodes in the past. So LT(-1) is previous node, but implementations are not required to provide results for k < -1. LT(0) is undefined. For i>=n, return null. Return null for LT(0) and any index that results in an absolute address that is negative. This is analogus to the LT() method of the TokenStream, but this returns a tree node instead of a token. Makes code gen identical for both parser and tree grammars. :)

    }
  }


  protected void extractInformationFromTreeNodeStream(IntStream input) {
    TreeNodeStream nodes = (TreeNodeStream)input;
    this.node = nodes.LT(1);
    TreeAdaptor adaptor = nodes.getTreeAdaptor();
    Token payload = adaptor.getToken(node);
    if ( payload!=null ) {
      this.token = payload;
      if ( payload.getLine()<= 0 ) {

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    if ( payload!=null ) {
      this.token = payload;
      if ( payload.getLine()<= 0 ) {
        // imaginary node; no line/pos info; scan backwards
        int i = -1;
        Object priorNode = nodes.LT(i);
        while ( priorNode!=null ) {
          Token priorPayload = adaptor.getToken(priorNode);
          if ( priorPayload!=null && priorPayload.getLine()>0 ) {
            // we found the most recent real line / pos info
            this.line = priorPayload.getLine();

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            this.charPositionInLine = priorPayload.getCharPositionInLine();
            this.approximateLineInfo = true;
            break;
          }
          --i;
          priorNode = nodes.LT(i);
        }
      }
      else { // node created from real token
        this.line = payload.getLine();
        this.charPositionInLine = payload.getCharPositionInLine();

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