#### 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