F2py things. Precision stuff is still broken

docs/sphinx/devel/fortran2python.rst

+.. _fortran2python:
+
+Fortran to python interface
+===========================
+
+This page propose a tutorial to call some fortran subroutines in python within hysop.
+
+
+Sources:
+
+    * some fortran files which contain some subroutines inside some modules
+    * a pyf file
+
+
+
+      TO BE DONE !!!
+
+
+
+      
+
+Kind values
+-----------
+
+According to f2py doc: "Currently, F2PY can handle only <type spec>(kind=<kindselector>) declarations where <kindselector> is a numeric integer (e.g. 1, 2, 4,...) but not a function call KIND(..) or any other expression. F2PY needs to know what would be the corresponding C type and a general solution for that would be too complicated to implement."
+
+To overcome this, a .f2py_f2cmap is generated during the build, from hysop/f2py_f2cmap.in.
+It contains all the required mappings defined as a dictionnary, like::
+
+  {'integer':{'c_int':'int'}, 'real':{'real64':'double', 'wp':'double'}}
+
+In that example, a fortran :code:'real(kind=wp)' will be mapped into a double-precision real in python.
+
+
+

hysop/common_f/template.f95

+  !! Template file - Provide an example
+  !! to write f2py interface between fortran and python
+
+
+module template_f2py
+
+  use precision
+ 
+  implicit none
+
+  !> a global var
+  integer, parameter :: var1 = 12
+ 
+contains
+
+  !> do something ...
+  subroutine check_f2py(input, output)
+    use precision
+    !> input array
+    real(kind=wp), dimension(:,:), intent(in) :: input
+    !> output array
+    real(kind=wp), dimension(:,:), intent(inout) :: output
+
+    print *, 'template f2py for tab'
+    output(:,:) = 2 * input(:,:)
+    print *, 'aha hah', output(1,1)
+  end subroutine check_f2py
+  
+end module template_f2py

hysop/common_f/template.pyf

+!    -*- f90 -*-
+! Note: the context of this file is case sensitive.
+module template_f2py ! in :template_f2py:template.f95
+  use precision
+  use ISO_FORTRAN_ENV
+  integer, parameter,optional :: var1=12
+  subroutine check_f2py(input,output) ! in :template_f2py:template.f95:template_f2py
+    use precision
+    use ISO_FORTRAN_ENV
+    real(kind=wp) dimension(:,:),intent(in) :: input
+    real(kind=wp), dimension(size(input,1), size(input,2)), intent(in,out), depend(input,input) :: output
+  end subroutine check_f2py
+end module template_f2py
+
+! This file was auto-generated with f2py (version:2).
+! See http://cens.ioc.ee/projects/f2py2e/