From: Vivien Maisonneuve <v.maisonneuve@gmail.com>
Date: Fri, 11 Jul 2014 14:18:39 +0000 (+0200)
Subject: Implement methods Polyhedron.__contains__(), Domain.__contains__()
X-Git-Tag: 1.0~127
X-Git-Url: https://scm.cri.ensmp.fr/git/linpy.git/commitdiff_plain/663316ddc03c19cf06e95bad67fd5ac2bb5e1dfc?ds=sidebyside

Implement methods Polyhedron.__contains__(), Domain.__contains__()
---

diff --git a/pypol/domains.py b/pypol/domains.py
index 3ab7d44..255c995 100644
--- a/pypol/domains.py
+++ b/pypol/domains.py
@@ -312,6 +312,12 @@ class Domain:
             points.append(Point(coordinates))
         return points
 
+    def __contains__(self, point):
+        for polyhedron in self.polyhedra:
+            if point in polyhedron:
+                return True
+        return False
+
     def subs(self, symbol, expression=None):
         polyhedra = [polyhedron.subs(symbol, expression)
             for polyhedron in self.polyhedra]
diff --git a/pypol/polyhedra.py b/pypol/polyhedra.py
index 3db8f40..a08213d 100644
--- a/pypol/polyhedra.py
+++ b/pypol/polyhedra.py
@@ -6,6 +6,7 @@ import numbers
 from . import islhelper
 
 from .islhelper import mainctx, libisl
+from .coordinates import Point
 from .linexprs import Expression, Symbol, Rational
 from .domains import Domain
 
@@ -87,6 +88,19 @@ class Polyhedron(Domain):
     def aspolyhedron(self):
         return self
 
+    def __contains__(self, point):
+        if not isinstance(point, Point):
+            raise TypeError('point must be a Point instance')
+        if self.symbols != point.symbols:
+            raise ValueError('arguments must belong to the same space')
+        for equality in self.equalities:
+            if equality.subs(point.coordinates()) != 0:
+                return False
+        for inequality in self.inequalities:
+            if inequality.subs(point.coordinates()) < 0:
+                return False
+        return True
+
     def subs(self, symbol, expression=None):
         equalities = [equality.subs(symbol, expression)
             for equality in self.equalities]