Commits on Oct 16, 2024

1. tsort: allow independent nodes …

   * When a node refers to itself in a pair it means the node exists but does not depend on anything
   * Previously, this input would result in a "cycle" error
   * In test file, allow node 'd' to be added to npred-hash with a predecessor count of zero, so it can appear in list-list
   * The inner "foreach" loop does not execute for node 'd' because it has no dependency; it has no need for an entry in succ-hash
   
   %perl cat in.tsort2
   a b
   b
     c
   d d
   %perl tsort.old in.tsort2
   a
   b
   c
   tsort.old: cycle detected
   %perl tsort in.tsort2
   a
   b
   c
   d
   %perl cat in.tsort3
   a a
   %perl tsort in.tsort3
   a

   

   mknos authored Oct 16, 2024
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