Hierarchic syntax error repair for LR grammars

@article{Barnard1982HierarchicSE,
  title={Hierarchic syntax error repair for LR grammars},
  author={David T. Barnard and Richard C. Holt},
  journal={International Journal of Computer & Information Sciences},
  year={1982},
  volume={11},
  pages={231-258}
}
A description of a technique for handling syntax errors in compilers, called hierarchic error repair, is presented. The technique is simple to understand and to implement. It always repairs a source program into a syntactically valid program and never causes the parser to back up. Details of embedding the technique in the LR family of parsers are given. 
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