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scan_statement [2021/02/08 18:09] – ↷ Links adapted because of a move operation revuskyscan_statement [2021/08/07 08:21] (current) – [The SCAN construct also you to use contextual predicates.] revusky
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-==== The SCAN construct also allows the newer LOOKBEHIND construct. ====+==== The SCAN construct allows you to use contextual predicates. ====
  
 The [[contextual_predicates]] construct allows you to express conditions based on scanning backwards in the lookahead/call stack. This can only be used in conjunction with the newer ''SCAN'' statement, not with the legacy ''LOOKAHEAD'' construct.  The [[contextual_predicates]] construct allows you to express conditions based on scanning backwards in the lookahead/call stack. This can only be used in conjunction with the newer ''SCAN'' statement, not with the legacy ''LOOKAHEAD'' construct.