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SectionWriter Class Reference

Detailed Description

In the LGF file extra sections can be placed, which contain any data in arbitrary format. Such sections can be written with this class. A writing rule can be added to the class with two different functions. With the sectionLines() function a generator can write the section line-by-line, while with the sectionStream() member the section can be written to an output stream.

#include <lemon/lgf_writer.h>

Public Member Functions

 SectionWriter (std::ostream &os)
 Constructor. More...
 
 SectionWriter (const std::string &fn)
 Constructor. More...
 
 SectionWriter (const char *fn)
 Constructor. More...
 
 ~SectionWriter ()
 Destructor.
 
Section Writers
template<typename Functor >
SectionWritersectionLines (const std::string &type, Functor functor)
 Add a section writer with line oriented writing. More...
 
template<typename Functor >
SectionWritersectionStream (const std::string &type, Functor functor)
 Add a section writer with stream oriented writing. More...
 
Execution of the Writer
void run ()
 Start the batch processing. More...
 
std::ostream & ostream ()
 Give back the stream of the writer. More...
 

Related Functions

(Note that these are not member functions.)

SectionWriter sectionWriter (std::ostream &os)
 Return a SectionWriter class. More...
 
SectionWriter sectionWriter (const std::string &fn)
 Return a SectionWriter class. More...
 
SectionWriter sectionWriter (const char *fn)
 Return a SectionWriter class. More...
 

Constructor & Destructor Documentation

SectionWriter ( std::ostream &  os)
inline

Construct a section writer, which writes to the given output stream.

SectionWriter ( const std::string &  fn)
inline

Construct a section writer, which writes into the given file.

SectionWriter ( const char *  fn)
inline

Construct a section writer, which writes into the given file.

Member Function Documentation

SectionWriter& sectionLines ( const std::string &  type,
Functor  functor 
)
inline

The first parameter is the type descriptor of the section, the second is a generator with std::string values. At the writing process, the returned std::string will be written into the output file until it is an empty string.

For example, an integer vector is written into a section.

* @numbers
* 12 45 23 78
* 4 28 38 28
* 23 6 16
*

The generator is implemented as a struct.

* struct NumberSection {
* std::vector<int>::const_iterator _it, _end;
* NumberSection(const std::vector<int>& data)
* : _it(data.begin()), _end(data.end()) {}
* std::string operator()() {
* int rem_in_line = 4;
* std::ostringstream ls;
* while (rem_in_line > 0 && _it != _end) {
* ls << *(_it++) << ' ';
* --rem_in_line;
* }
* return ls.str();
* }
* };
*
* // ...
*
* writer.sectionLines("numbers", NumberSection(vec));
*
SectionWriter& sectionStream ( const std::string &  type,
Functor  functor 
)
inline

The first parameter is the type of the section, the second is a functor, which takes a std::ostream& parameter. The functor writes the section to the output stream.

Warning
The last line must be closed with end-line character.
void run ( )
inline

This function starts the batch processing.

std::ostream& ostream ( )
inline

Returns the stream of the writer

Friends And Related Function Documentation

SectionWriter sectionWriter ( const std::string &  fn)
related

This function just returns a SectionWriter class.

See Also
sectionWriter(std::ostream& os)
SectionWriter sectionWriter ( const char *  fn)
related

This function just returns a SectionWriter class.

See Also
sectionWriter(std::ostream& os)