[cvs-nhc98] cvs commit: hat/src/hattools Pattern.hs

[Malcolm Wallace]

malcolm     2006/05/24 05:54:18 PDT

  Modified files:
    src/hattools         Pattern.hs 
  Log:
  Partial fix for a hat-observe pattern involving infix constructors.
  Chained constructors like (_ :- _ :+ _ :* _) previously matched only on
  the first constructor (giving lots of false positives).  Now the
  constructors are treated as left assocative, with equal precedence,
  which does the right thing for normal lists at least.  (A full solution
  using known fixities from the trace file would be hugely more complex.)
  
  Revision  Changes    Path
  1.15      +7 -4      hat/src/hattools/Pattern.hs