#include <map>
#include <msp/io/file.h>
-#include "except.h"
#include "loaderaction.h"
+#include "meta.h"
#include "parser.h"
#include "statement.h"
class Loader
{
private:
- struct ActionKey
- {
- std::string keyword;
- std::string signature;
-
- ActionKey(const std::string &, const std::string &);
-
- bool operator<(const ActionKey &) const;
- };
-
- typedef std::map<ActionKey, LoaderAction *> ActionMap;
+ typedef std::map<StatementKey, LoaderAction *> ActionMap;
ActionMap actions;
+ Parser *cur_parser;
+ unsigned cur_level;
const Statement *cur_st;
bool sub_loaded;
+ bool direct;
+ std::list<Loader *> aux_loaders;
protected:
- bool allow_pointer_reload;
bool check_sub_loads;
Loader();
public:
virtual ~Loader();
- bool is_pointer_reload_allowed() const { return allow_pointer_reload; }
-
/** Loads statements from a parser. */
void load(Parser &p);
/** Loads data from a statement. */
void load(const Statement &st);
+ /** Loads statemsnts from a parser, feeding them directly to actions. */
+ void load_direct(Parser &, unsigned);
+
/** Processes a single statement */
void load_statement(const Statement &st);
private:
void add(const std::string &, LoaderAction *);
- LoaderAction *find_action(const ActionKey &) const;
+protected:
+ void add_auxiliary_loader(Loader &);
+
+private:
+ bool has_action(const StatementKey &) const;
+ LoaderAction *find_action(const StatementKey &) const;
protected:
/** Returns the source of the statement being processed. This can be used
to implement relative paths in include-like statements. Note that the
source may not necessarily be a file. */
- const std::string &get_source() const
- {
- if(!cur_st)
- throw InvalidState("get_source called without current statement");
- return cur_st->source;
- }
+ const std::string &get_source() const;
+
+ /** Returns the keyword of the statement being processed. Can be used to
+ implement dynamic keywords. */
+ const std::string &get_keyword() const;
virtual void finish() { }
};
+#if __cplusplus>=201103L
+/**
+Loads an object from a file. The object must have a public Loader class. Any
+extra arguments are passed to the Loader constructor.
+*/
+template<typename T, typename... Args>
+void load(T &obj, const std::string &fn, Args &... args)
+{
+ IO::BufferedFile in(fn);
+
+ Parser parser(in, fn);
+ typename T::Loader loader(obj, args...);
+ loader.load(parser);
+}
+
+/**
+Loads an object from a file stored in a collection. The object must havea
+public Loader class. The collection is passed to the Loader constructor,
+followed by any extra arguments.
+*/
+template<typename T, typename... Args>
+void load(T &obj, typename T::Loader::Collection &coll, const std::string &fn, Args &... args)
+{
+ RefPtr<IO::Seekable> in = coll.open_raw(fn);
+
+ Parser parser(*in, fn);
+ typename T::Loader loader(obj, coll, args...);
+ loader.load(parser);
+}
+
+/**
+Loads an object from a file stored in a collection. The object must havea
+public Loader class. Any extra arguments are passed to the Loader constructor.
+*/
+template<typename T, typename C, typename... Args>
+typename EnableIf<NeedsCollection<typename T::Loader>::value, void>::No load(T &obj, C &coll, const std::string &fn, Args &... args)
+{
+ RefPtr<IO::Seekable> in = coll.open_raw(fn);
+
+ Parser parser(*in, fn);
+ typename T::Loader loader(obj, args...);
+ loader.load(parser);
+}
+
+#else
+
/**
Loads an object from a file. The object must have a public Loader class.
*/
loader.load(parser);
}
+/**
+Loads an object from a file, passing one extra argument to the Loader
+constructor. The object must have a public Loader class.
+*/
template<typename T, typename U>
void load(T &obj, const std::string &fn, U &arg)
{
typename T::Loader loader(obj, arg);
loader.load(parser);
}
+#endif
} // namespace DataFile
} // namespace Msp