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#### Superclass Methods for all sparse logical matrices

if(FALSE) ## bug? in 'methods' - see ./nsparseMatrix.R :
setAs("CsparseMatrix", "lsparseMatrix",
      function(from) as(.Call(Csparse_to_nz_pattern, from,
                  is(from, "triangularMatrix")), "lsparseMatrix"))
## substitute:
setAs("CsparseMatrix", "lsparseMatrix",
      function(from) {
      cld <- getClassDef(class(from))
      if(extends(cld, "lsparseMatrix"))
          from
      else if(extends(cld, "nsparseMatrix"))
          as(from, "lsparseMatrix")
      else
          as(.Call(Csparse_to_nz_pattern, from,
               extends(cld, "triangularMatrix")),
         "lsparseMatrix")
      })


setAs("lsparseMatrix", "matrix",
      function(from) as(as(from, "ldenseMatrix"), "matrix"))


###------- Work via  as(*, lgC) : ------------

## For multiplication operations, sparseMatrix overrides other method
## selections.  Coerce a ddensematrix argument to a lsparseMatrix.

setMethod("%*%", signature(x = "lsparseMatrix", y = "ldenseMatrix"),
      function(x, y) x %*% as(y, "lsparseMatrix"))

setMethod("%*%", signature(x = "ldenseMatrix", y = "lsparseMatrix"),
      function(x, y) as(x, "lsparseMatrix") %*% y)

setMethod("crossprod", signature(x = "lsparseMatrix", y = "ldenseMatrix"),
      function(x, y = NULL) crossprod(x, as(y, "lsparseMatrix")))

setMethod("crossprod", signature(x = "ldenseMatrix", y = "lsparseMatrix"),
      function(x, y = NULL) crossprod(as(x, "lsparseMatrix"), y))

## and coerce lsparse* to lgC*
setMethod("%*%", signature(x = "lsparseMatrix", y = "lsparseMatrix"),
      function(x, y) as(x, "lgCMatrix") %*% as(y, "lgCMatrix"))

setMethod("crossprod", signature(x = "lsparseMatrix", y = "lsparseMatrix"),
      function(x, y = NULL)
      crossprod(as(x, "lgCMatrix"), as(y, "lgCMatrix")))


setMethod("all", signature(x = "lsparseMatrix"),
      function(x, ..., na.rm = FALSE) {
          d <- x@Dim
          l.x <- length(x@x)
          if(l.x == prod(d)) ## fully non-zero
          all(x@x, ..., na.rm = na.rm)
          else if(is(x, "symmetricMatrix") && l.x == choose(d[1]+1, 2)) {
          if(.Generic %in% summGener1)
              all(x@x, ..., na.rm = na.rm)
          else all(as(x, "generalMatrix")@x, ..., na.rm = na.rm)
          }
          else FALSE ## has at least one structural 0
      })

## setMethod("any", ) ---> ./lMatrix.R