X-Git-Url: https://svn.cri.ensmp.fr/git/linpy.git/blobdiff_plain/d06ab92943ec2e10a2bd798ca7c1b5cea395bf34..7f60c3d845f3035ce675bfe4cc0d2d01456013c6:/pypol/domains.py

diff --git a/pypol/domains.py b/pypol/domains.py
index abc2d91..74351fc 100644
--- a/pypol/domains.py
+++ b/pypol/domains.py
@@ -335,10 +335,25 @@ class Domain:
 
     @classmethod
     def fromsympy(cls, expr):
-        raise NotImplementedError
+        import sympy
+        from .polyhedra import Lt, Le, Eq, Ne, Ge, Gt
+        funcmap = {
+            sympy.And: And, sympy.Or: Or, sympy.Not: Not,
+            sympy.Lt: Lt, sympy.Le: Le,
+            sympy.Eq: Eq, sympy.Ne: Ne,
+            sympy.Ge: Ge, sympy.Gt: Gt,
+        }
+        if expr.func in funcmap:
+            args = [Domain.fromsympy(arg) for arg in expr.args]
+            return funcmap[expr.func](*args)
+        elif isinstance(expr, sympy.Expr):
+            return Expression.fromsympy(expr)
+        raise ValueError('non-domain expression: {!r}'.format(expr))
 
     def tosympy(self):
-        raise NotImplementedError
+        import sympy
+        polyhedra = [polyhedron.tosympy() for polyhedron in polyhedra]
+        return sympy.Or(*polyhedra)
 
 
 def And(*domains):