[QGIS-trac] [Quantum GIS] #3627: Raster calculator: -1 invalid expression

[Quantum GIS]

#3627: Raster calculator: -1 invalid expression
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   Reporter:  pcav                              |              Owner:  mhugent      
       Type:  bug                               |             Status:  new          
   Priority:  major: does not work as expected  |          Milestone:  Version 1.7.0
  Component:  Rasters                           |            Version:               
   Keywords:                                    |   Platform_version:               
   Platform:  All                               |           Must_fix:  No           
Status_info:  0                                 |  
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 Currently these expressions are invalid:
 {{{
 (diff at 1)*-1
 (diff at 1)*(-1)
 }}}
 because there is no unary minus in the raster calc grammar yet
 (%left UMINUS  // fictitious symbol (for unary minus)  ).

 As a workaround, (diff at 1)* (0-1) is ok

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Ticket URL: <https://trac.osgeo.org/qgis/ticket/3627>
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