X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fcondition.h;fp=source%2Fcondition.h;h=163c9c828f6d7499f5be57442e8fac5bfbb87486;hb=eac6a71e79797e6d37b620a91acb3c0541f1c07e;hp=979f1e904714032788a8daf1d850568c713f353e;hpb=694d2890065b1555a01a81994cb80f106ca577ee;p=poefilter.git

diff --git a/source/condition.h b/source/condition.h
index 979f1e9..163c9c8 100644
--- a/source/condition.h
+++ b/source/condition.h
@@ -21,6 +21,7 @@ public:
 	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 bool is_viable() const { return true; }
 	virtual void add_lines(std::list<FilterStatement> &) const = 0;
 };
 
@@ -71,6 +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;
 };
 
@@ -87,6 +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;
 };