lib/dot/examples/hello.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 # http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 # Example from http://www.graphviz.org/content/hello
  16 module hello is example
  17
  18 import dot
  19
  20 var graph = new DotGraph("G", "digraph")
  21
  22 var hello = graph.add_node("hello")
  23 var world = graph.add_node("world")
  24 graph.add_edge(hello, world)
  25
  26 if args.is_empty then
  27         print graph.to_dot
  28 else
  29         graph.to_dot.write_to_file args.first
  30 end