Tighten some parameters and return values

[poefilter.git] / source / condition.h

diff --git a/source/condition.h b/source/condition.h
index 141e57094cfd666a3b789b889329dbec50b2c1ed..bbabf22e5f27d98c8de47b0b4a58622a910dff63 100644 (file)
--- a/source/condition.h
+++ b/source/condition.h
@@ -20,7 +20,8 @@ public:
        virtual Condition *clone() const = 0;
        virtual Condition *flatten() const { return clone(); }
        virtual bool can_merge(const Condition &, const CompoundCondition &) const { return false; }
-       virtual Condition *merge(const std::vector<Condition *> &, const CompoundCondition &) const { return 0; }
+       virtual Condition *merge(const std::vector<const Condition *> &, const CompoundCondition &) const { return 0; }
+       virtual bool is_viable() const { return true; }
        virtual void add_lines(std::list<FilterStatement> &) const = 0;
 };
 
@@ -42,11 +43,14 @@ protected:
 public:
        void add(Condition *);
        unsigned count() const { return conditions.size(); }
-       const Condition *get(unsigned) const;
+       const Condition &get(unsigned) const;
 
        virtual Condition *flatten() const;
 protected:
        Condition *dispatch_flatten(Condition *, Condition *) const;
+       Condition *merge_two(Condition *, Condition *, bool) const;
+       Condition *add_merged_to(Condition *, CompoundCondition *, bool) const;
+       Condition *merge_contents_to(CompoundCondition *, CompoundCondition *) const;
        virtual Condition *flatten(Condition *, Condition *) const = 0;
        virtual Condition *flatten(AndCondition *, Condition *) const = 0;
        virtual Condition *flatten(AndCondition *, AndCondition *) const = 0;
@@ -68,6 +72,7 @@ protected:
        virtual Condition *flatten(OrCondition *, AndCondition *) const;
        virtual Condition *flatten(OrCondition *, OrCondition *) const;
 public:
+       virtual bool is_viable() const;
        virtual void add_lines(std::list<FilterStatement> &) const;
 };
 
@@ -84,6 +89,7 @@ protected:
        virtual Condition *flatten(OrCondition *, AndCondition *) const;
        virtual Condition *flatten(OrCondition *, OrCondition *) const;
 public:
+       virtual bool is_viable() const;
        virtual void add_lines(std::list<FilterStatement> &) const;
 };