module python
imports libstrategolib signatures/- util

signature
  constructors
    TopLevel: Ex -> Ex

rules

  py: TopLevel(x) -> $[import sys
  class StdioC:
    def gets(self, v):
      print(v, file=sys.stdout, end='')
      return self
  def to(data,strm):
    strm.gets(data)
    return data
  Stdio = StdioC()
  [x]]

  py: Stream()    -> $[Stdio]
  py: Int(x)      -> x
  py: Sum(x,y)    -> $[[x] + [y]]
  py: Gets(x, y)  -> $[[x].gets([y])]
  py: To(x, y)    -> $[to([x],[y])]
  py: Sequence(l) -> <join(|"\n")>l

strategies

  python = bottomup(try(py))

  // Interface python code generation with editor services and file system
  to-python: (selected, _, _, path, project-path) -> (filename, result)
    with filename := <guarantee-extension(|"py")> path
       ; result   := <python> selected