temp_file.hh

/* -*-mode:c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

#ifndef TEMP_FILE_HH
#define TEMP_FILE_HH

#include <string>
#include <vector>

#include "file_descriptor.hh"

class UniqueFile
{
private:
    std::vector<char> mutable_temp_filename_;
    FileDescriptor fd_;

protected:
    bool moved_away_;

public:
    UniqueFile( const std::string & filename_template );
    virtual ~UniqueFile() {}

    std::string name( void ) const;

    void write( const std::string & contents );

    FileDescriptor & fd( void ) { return fd_; }

    /* ban copying */
    UniqueFile( const UniqueFile & other ) = delete;
    UniqueFile & operator=( const UniqueFile & other ) = delete;

    /* allow move constructor */
    UniqueFile( UniqueFile && other );

    /* ... but not move assignment operator */
    UniqueFile & operator=( UniqueFile && other ) = delete;
};

/* TempFile is deleted when object destroyed */
class TempFile : public UniqueFile
{
public:
    using UniqueFile::UniqueFile;

    /* allow move constructor */
    TempFile( TempFile && other ) : UniqueFile( std::move( other ) ) {}

    ~TempFile();
};

#endif