#ifndef MSP_DATAFILE_LOADER_H_
#define MSP_DATAFILE_LOADER_H_
-#include <fstream>
#include <map>
+#include <msp/io/buffered.h>
+#include <msp/io/file.h>
#include "except.h"
#include "parser.h"
#include "statement.h"
*/
template<typename S>
void load_sub(S &s)
- { load_sub<typename S::Loader, S>(s); }
-
- /**
- Loads a sub-object with a custom Loader class.
- */
- template<typename L, typename S>
- void load_sub(S &s)
{
- if(!cur_st)
- throw InvalidState("load_sub called without current statement");
- L loader(s);
- loader.load(*cur_st);
+ typename S::Loader ldr(s);
+ load_sub_with(ldr);
}
- template<typename S, typename T>
- void load_sub(S &s, T &p)
- { load_sub<typename S::Loader, S, T>(s, p); }
-
/**
- Loads a sub-object with a custom Loader class that takes one argument in
- addition to to object to be loaded.
+ Loads a sub-object from the statement being processed with an extra parameter
+ for the Loader. The Loader class of the sub-object is automatically used.
*/
- template<typename L, typename S, typename T>
+ template<typename S, typename T>
void load_sub(S &s, T &p)
{
- if(!cur_st)
- throw InvalidState("load_sub called without current statement");
- L loader(s, p);
- loader.load(*cur_st);
+ typename S::Loader ldr(s, p);
+ load_sub_with(ldr);
}
+ /**
+ Processes the current statement's substatements with another Loader.
+ */
+ void load_sub_with(Loader &);
+
/**
Returns the source of the statement being processed. This can be used to
implement relative paths in include-like statements. Note that the source
template<typename T>
void load(T &obj, const std::string &fn)
{
- std::ifstream in(fn.c_str());
- if(!in)
- throw Exception("Couldn't open "+fn);
+ IO::File in(fn);
+ IO::Buffered buf(in);
- Parser parser(in, fn);
+ Parser parser(buf, fn);
typename T::Loader loader(obj);
loader.load(parser);
}
template<typename T, typename U>
void load(T &obj, const std::string &fn, U arg)
{
- std::ifstream in(fn.c_str());
- if(!in)
- throw Exception("Couldn't open "+fn);
+ IO::File in(fn);
+ IO::Buffered buf(in);
Parser parser(in, fn);
typename T::Loader loader(obj, arg);