static declaration creates linker error
When I run the code below with the private LinkedList declared without the static qualifier, it compiles and runs exactly as I expect. As soon as I add the static declaration, I get linker errors and it can't find the LinkedList. Any thoughts?
Code:
#ifndef CS240_URL_SET_H
#define CS240_URL_SET_H
//Dustin Nicholes
//October 21, 2008
//CS 240
//URLSet.h
#include "URL.h"
#include "LinkedList.h"
#include "StringUtil.h"
class URLSet
{
private:
static LinkedList<URL> urlSet;
public:
URLSet()
{}
bool addURL(URL & url)
{
if(!Contains(url))
{
urlSet.Insert(new URL(url), NULL);
return true;
}
return false;
}
bool Contains(URL & url)
{
LLNode<URL> *LLCurrent;
LLCurrent=urlSet.GetFirst();
string scheme = StringUtil::ToLowerCopy(url.getScheme());
string netLoc = StringUtil::ToLowerCopy(url.getNetLocation());
string path = url.getPath();
while(LLCurrent)
{
string otherString((LLCurrent->value)->toString());
URL other(otherString);
string otherScheme = StringUtil::ToLowerCopy(other.getScheme());
string otherNetLoc = StringUtil::ToLowerCopy(other.getNetLocation());
string otherPath = other.getPath();
string thisString(scheme+netLoc+path);
string thatString(otherScheme+otherNetLoc+otherPath);
if(thisString.compare(thatString)==0)
return true;
LLCurrent = LLCurrent->next;
}
return false;
}
static bool Test(ostream & os)
{
os<<"Starting URL Set Test: ";
bool success = true;
string urlString("http://students.cs.byu.edu/~cs240ta/util_docs/");
URL url1(urlString);
urlString="http://students.cs.byu.edu/~cs240ta/fall2008/";
URL url2(urlString);
urlString="http://students.cs.byu.edu/~cs240ta/fall2008/TA/";
URL url3(urlString);
urlString="HtTp://students.cs.byu.edu/~cs240ta/fall2008/TA/";
URL url4(urlString);
urlString="http://students.cs.byu.edu/bogus/";
URL url5(urlString);
URLSet testSet;
TEST(testSet.addURL(url1));
TEST(testSet.addURL(url2));
TEST(testSet.addURL(url3));
TEST(!testSet.addURL(url4));
TEST(testSet.Contains(url1));
TEST(testSet.Contains(url2));
TEST(testSet.Contains(url3));
TEST(!testSet.Contains(url5));
if(success)
os<<"Passed\r\n";
else
os<<"Failed!!\r\b";
return success;
}
};
#endif
