+ /** Adds a dependency for the target. Order is preseved and is important
+ for some target types. It is an error to create dependency cycles, although
+ this won't be detected until the targets are prepared. */
+ void add_dependency(Target &);
+
+ void add_transitive_dependency(Target &);
+
+ /** Adds a side effect for the target. Side effects are not built on their
+ own, but together with their primary target. */
+ void add_side_effect(Target &);
+
+protected:
+ /** Finds dependencies for the target. Called during preparation. If the
+ target needs to recursively inspect its dependencies, it should prepare its
+ direct dependencies first. */
+ virtual void find_dependencies() { }
+
+public:
+ /// Returns the dependencies of the target, in the order they were added.
+ const Dependencies &get_dependencies() const { return depends; }
+
+ const Dependencies &get_transitive_dependencies() const { return trans_depends; }
+
+ /// Returns the side effects of the target.
+ const Dependencies &get_side_effects() const { return side_effects; }
+
+ /// Returns the primary target associated with a side effect target.
+ Target *get_primary_target() const { return primary_target; }
+