error c2228 left of '._ptr' must have class/struct/union

[Turnip]

I am getting this error and I cant figure out why. I am very new to boost filesystem library

error c2228 left of '._ptr' must have class/struct/union

EDIT: If it helps any the error is in the filesystem Library line 1749

  #include <iostream>
#include <string>
#include <vector>
using namespace std;

#include <filesystem>
using namespace std::tr2::sys;

void fileSearch (string switches, path const& f, unsigned k = 0)
{
	int cpp = 0, c= 0, h= 0, hpp= 0, hxx= 0, java= 0, totalClass= 0, avi= 0, mkv= 0, mpeg= 0, mp4= 0, mp3= 0;
	long long cppBy = 0, cBy= 0, hBy= 0, hppBy= 0, hxxBy= 0, javaBy= 0, totalClassBy= 0, aviBy= 0, mkvBy= 0, mpegBy= 0, mp4By= 0, mp3By= 0;
	long long totalBytes = 0;
	string indent( k , '\t' );
	directory_iterator temp;		// used to temporarily store d
	directory_iterator d( f );		// beginning of folder 'f'
	directory_iterator e;			// end of any folder
	bool isReverse = false;
	bool isRecursive = false;
	for (unsigned check = 0; check < switches.size(); ++check)
	{
		if (switches[check] == 'r')
		{
			isRecursive = true;
		}

		else if (switches[check] == 'R')
		{
			isReverse = true;
		}
	}

	for (unsigned int i = 0; i < switches.size(); ++i)
	{
		if (switches[i] == 'c')	// c: search for c++ files (c++ files extension: .c,.cpp,.h,.hpp,.hxx)
		{
			if ( d->path().extension() == ".c")
			{
				c++;
				cBy += file_size(is_directory( d->status()));
					
			}

			else if ( d->path().extension() == ".cpp")
			{
				cpp++;
				cppBy += file_size(is_directory( d->status()));
					
			}

			else if ( d->path().extension() == ".h")
			{
				h++;
				hBy += file_size(is_directory( d->status()));
					
			}

			else if ( d->path().extension() == ".hpp")
			{
				hpp++;
				hppBy += file_size(is_directory( d->status()));
					
			}

			else if ( d->path().extension() == ".hxx")
			{
				hxx++;
				hxxBy += file_size(is_directory( d->status()));
					
			}
		}				
		else if (switches[i] == 'j') // j: search for java files (java files extension: .java,.class)
		{
			if ( d->path().extension() == ".java")
			{
				java++;
				javaBy += file_size(is_directory( d->status()));
					
			}

			else if ( d->path().extension() == ".class")
			{
				totalClass++;
				totalClassBy += file_size(is_directory( d->status()));
					
			}
		}
		else if (switches[i] == 'm') // m: search for multimedia files (multimedia files extension: .avi,.mkv,.mpeg,.mp4,.mp3)
		{
			if ( d->path().extension() == ".avi")
			{
				avi++;
				aviBy += file_size(is_directory( d->status()));
					
			}

			else if ( d->path().extension() == ".mkv")
			{
				mkv++;
				mkvBy += file_size(is_directory( d->status()));
					
			}

			else if ( d->path().extension() == ".mpeg")
			{
				mpeg++;
				mpegBy += file_size(is_directory( d->status()));
					
			}

			else if ( d->path().extension() == ".mp4")
			{
				mp4++;
				mp4By += file_size(is_directory( d->status()));
					
			}

			else if ( d->path().extension() == ".mp3")
			{
				mp3++;
				mp3By += file_size(is_directory( d->status()));
					
			}
		}
		else if (switches[i] == 'x') // x: search extensions using a regex expression (ie:  -x “\.(docx|xlsx)”)
		{

		}
		else if (switches[i] == 'r') // r: process all folders recursively.
		{
			
		}
		else if (switches[i] == 'R') // R: list the files in reverse order.
		{

		}
		else if (switches[i] == 's') // s: sort the files by ascending file size – or descending if the R switch is provided.
		{

		}
		else if (switches[i] == 'h') // h: shows the help usage for running the program
		{

		}
		else
		{	
				
		}
	}

	totalBytes += totalClass; 
	totalBytes += javaBy;
	totalBytes += hxxBy;
	totalBytes += hppBy;
	totalBytes += hBy;
	totalBytes += cppBy;
	totalBytes += cBy;
	totalBytes += aviBy;
	totalBytes += mkvBy;
	totalBytes += mpegBy;
	totalBytes += mp3By;
	totalBytes += mp4By;

	//temp = d;
	for( ; d != e; ++d ) // Outputs folder path
	{
		cout << indent << "Scanning: " << d->path();
	}

	cout << endl;

	if (isRecursive == false && isReverse == false)
	{
		cout << indent << system_complete( f ) << endl;
		directory_iterator d( f );		// beginning of folder 'f'
		directory_iterator e;			// end of any folder
		//temp = d;		
		for( ; d != e; ++d ) 
		{
			cout << indent << d->path().extension() << " " << file_size(is_directory( d->status())) << endl;
		}
	}

	else if (isRecursive == true && isReverse == false)
	{
	}

	else if (isRecursive == false && isReverse == true)
	{		
		string indent( k , '\t' );	
		cout << indent << system_complete( f ) << endl;
				
					
		for( ; d != e; ++d ) 
		{
			cout << indent << d->path() << ( is_directory( d->status() ) ? " [dir]" : "" ) <<
					" ext=" << d->path().extension() << endl;
		}
	}

	else if (isRecursive == true && isReverse == true)
	{
		recursive_directory_iterator d( f ), e;
		for( ; d != e; ++d ) 
		{
			cout << d->path() << ( is_directory( d->status() ) ? " [dir]" : "" ) << endl;
		}
	}

	else 
	{
		cout << "error" << endl;
	}
}

int main(int argc, char* argv[])
{
	path folder = "..";
	string switches, argStr;
	string pathStart;
	
	// boolean switches declared and initialized to off
	bool searchCPP = false, searchJ = false, searchMM = false, searchRegex = false,
		 searchRecursive = false, searchReverse = false, sortFiles = false, help = false; 
	if (argc == 2)
	{
		argStr = argv[1];
		if (argStr[0] == '-' || argStr[0] == 'c' || argStr[0] == 'j' || argStr[0] == 'm' || argStr[0] == 'x'
			|| argStr[0] == 'r' || argStr[0] == 'R' || argStr[0] == 's' || argStr[0] == 'h')
		{
			switches = argStr;
		}

		else
		{
			pathStart = argStr;
		}
	}

	else if (argc == 3)
	{
		argStr = argv[1];

		if (argStr[0] == '-' || argStr[0] == 'c' || argStr[0] == 'j' || argStr[0] == 'm' || argStr[0] == 'x'
		|| argStr[0] == 'r' || argStr[0] == 'R' || argStr[0] == 's' || argStr[0] == 'h')
		{
			switches = argStr;
			pathStart = argv[2];
		}

		else if (argStr[1] == ':')
		{
			pathStart = argStr;
			switches = argv[2];
		}

		else
		{
			cout << "Incorrect Argument entered.. Exiting" << endl;
			return EXIT_FAILURE;
		}
	}

	else if (argc > 3)
	{
		cout << "Too many arguments entered... Exiting" << endl;
		return EXIT_FAILURE;
	}

	if (switches.size() > 0)
	{
		for (unsigned int i = 0; i < switches.size(); ++i)
		{
			if (switches[0] == '-')
				continue;
			else if (switches[i] == 'c')
				searchCPP = true;
			else if (switches[i] == 'j')
				searchJ = true;
			else if (switches[i] == 'm')
				searchMM = true;
			else if (switches[i] == 'x')
				searchRegex = true;
			else if (switches[i] == 'r')
				searchRecursive = true;
			else if (switches[i] == 'R')
				searchReverse = true;
			else if (switches[i] == 's')
				sortFiles = true;
			else if (switches[i] == 'h')
				help = true;
			else
			{
				cout << "Incorrect switch entered... Exiting" << endl;
				return EXIT_FAILURE;
			}
		}
	}
	
	fileSearch(switches, folder);
	
	return EXIT_SUCCESS;
}

[Turnip]

Was using d->path().extension() instead of assing d->path() to a variable of type path ex:

path p;
p = d->path();

p.extension();