#-------------------------------------------------------------
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
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#-------------------------------------------------------------

foo = function(Matrix[Double] X, Matrix[Double] h=matrix(0,0,0))
  return (Matrix[Double] X2)
{
  print(nrow(h)+" "+ncol(h)+" "+length(h));
  #if( length(h)==0 ) # worked
  if( isEmpty(h) ) # didn't work
    h = 2 * X;
  X2 = h - X;
}

isEmpty = function(Matrix[Double] h)
  return (boolean R)
{
  R = (length(h) == 0);
}


X = rand(rows=100, cols=100, seed=7)

X2 = foo(X=X);

if( sum((X-X2)>1e-10)>0 )
  stop("Incorrect results: "+sum(X)+" "+sum(X2))

