sql_query.cc

来自「有关MYSQL的开源码」· CC 代码 · 共 47 行

#include "mysqlcppapi/query/sql_query.h"

namespace mysqlcppapi
{

/*
 * Note that since SQLQuery inherits from an IOStream class it has a
 * std::ios virtual base class. The constructor for this is called by
 * the constructor for the complete object that inherits from it
 * (i.e. the constructor of the most-derived class in a hierarchy).
 * This means that the std::ios constructor will always be the first
 * object in the hierarchy constructed. We can safely default construct
 * it because the constructor for the std::stringstream base class will
 * be run afterwards and call std::ios::init().
 */

SQLQuery::SQLQuery()
: std::ios()
, std::stringstream()
, Success(false)
, errmsg()
{
}
  
SQLQuery::SQLQuery(const SQLQuery& src)
: std::ios()
, std::stringstream(static_cast<const std::stringstream&>(src).str())
, Success(src.Success)
, errmsg(src.errmsg)
{
}


SQLQuery& SQLQuery::operator= (const SQLQuery& src)
{
  const std::string& s = static_cast<const std::stringstream&>(src).str();
  static_cast<std::stringstream*>(this)->str(s);
  
  Success = src.Success;
  errmsg = src.errmsg;
 
  return *this;
}
  

} //namespace