Compare two triplets based on their index values (complex), first by
column and second by row. Returns A < B.
  Arguments
      
    
      
        | Type | Intent | Optional | Attributes |  | Name |  | 
    
        
            | type(Triplet_c), | intent(in) |  |  | :: | tripA | First triplet. | 
        
            | type(Triplet_c), | intent(in) |  |  | :: | tripB | Second triplet. | 
    
  
    
    Return Value
    logical
    
    A < B.