From c26f38114fedde81effb938ffbedfe922d77a322 Mon Sep 17 00:00:00 2001
From: Carlo Zancanaro <carlo@carlo-laptop>
Date: Tue, 7 Aug 2012 17:01:57 +1000
Subject: A whole bunch of clean up work around the place.

- Make it a bit nicer to use the command-line
- Remove the strategies we won't be using
- Clean up some code around the place, generally
---
 impl/VariableAssignment.hpp | 98 +++++++++++++++++++--------------------------
 1 file changed, 41 insertions(+), 57 deletions(-)

(limited to 'impl/VariableAssignment.hpp')

diff --git a/impl/VariableAssignment.hpp b/impl/VariableAssignment.hpp
index f41dab3..ead7c67 100644
--- a/impl/VariableAssignment.hpp
+++ b/impl/VariableAssignment.hpp
@@ -10,22 +10,6 @@ struct VariableAssignment {
   virtual const Domain& operator[](const Variable<Domain>&) const = 0;
 };
 
-template<typename Domain>
-struct StableVariableAssignment
-: public VariableAssignment<Domain>, public IdMap<Variable<Domain>, Domain> {
-  StableVariableAssignment(unsigned int length)
-    : IdMap<Variable<Domain>,Domain>(length, -infinity<Domain>()) { }
-  StableVariableAssignment(unsigned int length, const Domain& value)
-    : IdMap<Variable<Domain>,Domain>(length, value) { }
-
-  const Domain& operator[](const Variable<Domain>& var) const {
-    return IdMap<Variable<Domain>,Domain>::operator[](var);
-  }
-  Domain& operator[](const Variable<Domain>& var) {
-    return IdMap<Variable<Domain>,Domain>::operator[](var);
-  }
-};
-
 #include "EquationSystem.hpp"
 
 template<typename Domain>
@@ -50,7 +34,7 @@ struct DynamicVariableAssignment : public VariableAssignment<Domain> {
   }
 
   void invalidate(const Variable<Domain>& x) const {
-    log::fixpoint << "invalidating " << x << std::endl;
+    log::fixpoint << "\tInvalidating " << x << std::endl;
     _stable.remove(x);
     _values[x] = infinity<Domain>();
   }
@@ -58,53 +42,53 @@ struct DynamicVariableAssignment : public VariableAssignment<Domain> {
 private:
 
   void solve(const Variable<Domain>& x) const {
-      if (!_stable.contains(x)) {
-        _stable.insert(x);
-        
-        Domain val = _system[x]->eval(DependencyAssignment(*this, x),
-                                      _strategy);
-
-        if (val != _values[x]) {
-          log::fixpoint << "Updating value for " << x
-                        << " to " << val << std::endl;
-
-          auto oldInfluence = _influence[x];
-          _influence[x].clear();
-          _values[x] = val;
-
-          _strategy.invalidate(x);
-          
-          _stable.filter(oldInfluence);
-          
-          for (auto it = oldInfluence.begin();
-               it != oldInfluence.end();
-               ++it) {
-            solve(_system.variable(*it));
-          }
-        } else {
-          log::fixpoint << x << " did not change" << std::endl;
+    if (!_stable.contains(x)) {
+      _stable.insert(x);
+      log::fixpoint << "\tStabilise " << x << std::endl;
+
+      Domain val = _system[x]->eval(DependencyAssignment(*this, x),
+                                    _strategy);
+
+      if (val != _values[x]) {
+        log::fixpoint << x << " = " << val << std::endl;
+
+        auto oldInfluence = _influence[x];
+        _influence[x].clear();
+        _values[x] = val;
+
+        _strategy.invalidate(x);
+
+        _stable.filter(oldInfluence);
+
+        for (auto it = oldInfluence.begin();
+             it != oldInfluence.end();
+             ++it) {
+          solve(_system.variable(*it));
         }
       } else {
-        log::fixpoint << x << " is stable" << std::endl;
+        log::fixpoint << "\t" << x << " did not change" << std::endl;
       }
+    } else {
+      log::fixpoint << "\t" << x << " is stable" << std::endl;
     }
+  }
+
+  struct DependencyAssignment : public VariableAssignment<Domain> {
+    DependencyAssignment(const DynamicVariableAssignment& assignment, const Variable<Domain>& var)
+      : _assignment(assignment), _var(var) { }
+    const Domain& operator[](const Variable<Domain>& x) const {
+      const Domain& result = _assignment[x];
+      _assignment._influence[x].insert(_var);
+      return result;
+    }
+  private:
+    const DynamicVariableAssignment& _assignment;
+    const Variable<Domain>& _var;
+  };
 
-    struct DependencyAssignment : public VariableAssignment<Domain> {
-      DependencyAssignment(const DynamicVariableAssignment& assignment, const Variable<Domain>& var)
-        : _assignment(assignment), _var(var) { }
-      const Domain& operator[](const Variable<Domain>& x) const {
-        const Domain& result = _assignment[x];
-        _assignment._influence[x].insert(_var);
-        return result;
-      }
-    private:
-      const DynamicVariableAssignment& _assignment;
-      const Variable<Domain>& _var;
-    };
-  
   const EquationSystem<Domain>& _system;
   const DynamicMaxStrategy<Domain>& _strategy;
-  mutable StableVariableAssignment<Domain> _values;
+  mutable IdMap<Variable<Domain>, Domain> _values;
   mutable IdSet<Variable<Domain> > _stable;
   mutable IdMap<Variable<Domain>,IdSet<Variable<Domain> > > _influence;
 };
-- 
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