+public:
+ virtual ~Target() { }
+
+ virtual const char *get_type() const=0;
+ const std::string &get_name() const { return name; }
+ const Package *get_package() const { return package; }
+ const Msp::Time::TimeStamp &get_mtime() const { return mtime; }
+
+ /**
+ Tries to locate a target that will help getting this target built. If all
+ dependencies are up-to-date, returns this target. If there are no targets
+ ready to be built (maybe because they are being built right now), returns 0.
+ */
+ Target *get_buildable_target();
+
+ bool get_buildable() const { return buildable; }
+ bool get_rebuild() const { return rebuild; }
+ const std::string &get_rebuild_reason() const { return rebuild_reason; }
+ void add_depend(Target *);
+ const TargetList &get_depends() const { return depends; }
+ bool get_depends_ready() const { return deps_ready; }
+
+ /**
+ Finds dependencies for the target. When all dependencies have been found,
+ the function should set deps_ready to true.
+ */
+ virtual void find_depends() { deps_ready=true; }
+
+ /**
+ Prepares the target by recursively preparing dependencies, then checking
+ whether rebuilding is needed. A flag is used to prevent unnecessary
+ executions.
+ */
+ virtual void prepare();
+
+ /**
+ Starts building the target. Returns the Action used for building.
+ */
+ Action *build();
+
+ void reset_count() { counted=false; }
+
+ /**
+ Returns the number of targets that need to be rebuilt in order to get this
+ target up-to-date.
+ */
+ virtual unsigned count_rebuild();
+
+ /**
+ Changes the mtime of the target to the current time.
+ */
+ void touch();
+protected:
+ void mark_rebuild(const std::string &);
+
+ /**
+ Checks if the target needs to be rebuilt and why.
+ */