Weird String error (LNK2019)

This is a discussion on Weird String error (LNK2019) within the C++ Programming forums, part of the General Programming Boards category; Well, I've been working on a simple explorer.exe replacement, with it's own simple scripting language. Everything was going fine until ...

  1. #1
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    Weird String error (LNK2019)

    Well, I've been working on a simple explorer.exe replacement, with it's own simple scripting language.

    Everything was going fine until I added a ParseScript, and tokenizeString Function:
    Code:
    PUNCH error LNK2019: unresolved external symbol "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl punch::tokenizeString(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::vector<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > >,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)" (?tokenizeString@punch@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V23@V?$vector@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$allocator@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@2@@3@0@Z) referenced in function "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl punchScript::ParseScript(class punchScript::scriptObject)" (?ParseScript@punchScript@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@VscriptObject@1@@Z)
    Now, from what I can gather, the error is related to the ParseScript function. Here's that and the tokenizeString one (Based on the one from the FAQ):

    ParseScript:
    Code:
    string punchScript::ParseScript(scriptObject script)
    {
    	vector < string > commands;
    	punch::tokenizeString(script.commands, commands,  "\n");
    	
    	for(int i=0; i < (int)commands.size(); i++)
    	{
    		if(commands[i].find("createWindow ", 0) == 0)
    		{
    			string file = commands[i].erase(0, 12); //File for that command
    			char* buff = "";
    			sprintf(buff, "%s", file.c_str());
    			ShellExecute(NULL, "open", buff, NULL, NULL, SW_SHOWNORMAL);
    		}
    		
    		if(commands[i].find("script ", 0) == 0)
    		{
    			string file = commands[i].erase(0, 6); //File for that command
    			
    			scriptObject obj = LoadScript(file);
    			return ParseScript(obj);
    		}
    	}
    	
    	return "TRUE";
    }
    tokenizeString:
    Code:
             string tokenizeString(string str1, vector<string> target, string delimeter="\n")
             {
    			  string str = str1;
    			  vector <string> tokens; //we'll put all of the tokens in here 
    			  string  temp;
    
    			  while (str.find(delimeter, 0) != string::npos)
    			  { 
    			    size_t  pos = str.find(delimeter, 0); //store the position of the delimiter
    			    temp = str.substr(0, pos);      //get the token
    			    str.erase(0, pos + 1);          //erase it from the source 
    			    tokens.push_back(temp);                //and put it into the array
    			  }
    
      			  tokens.push_back(str);           //the last token is all alone
    				
    			 target = tokens;
    			 return "TRUE";
    		}
    Sorry for the overly-long post

  2. #2
    Supermassive black hole cboard_member's Avatar
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    You didn't need to double post.
    Good class architecture is not like a Swiss Army Knife; it should be more like a well balanced throwing knife.

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  3. #3
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    I double posted? :S

    I *Did* Have a browser crash almost as soon as I clicked "submit", but It didn't display on the page...

    *Shrugs* Could a mod please remove this topic, then?

  4. #4
    System Novice siavoshkc's Avatar
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    Where is your class definition?
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  5. #5
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    Code:
    class punchScript::scriptObject
    {
    	public:
    		string file; //Filename
    		string comments; //All the Comments, unused
    		
    		string commands; //List of commands and their parameters, separated by newline
    };
    I'll attach the other files as well..
    Attached Files Attached Files

  6. #6
    (?<!re)tired Mario F.'s Avatar
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    I wonder why you bother creating so many namespaces if then you simply throw them all away with the using directives. Might as well forget about namespaces. You will save yourself and anyone else an headache when looking at your code.

    Your problem is definitely related to this. std::string is not being seen inside the punch namespace. Fix it.

    (I bet you are going to place using namespace std inside punch)
    Last edited by Mario F.; 08-08-2006 at 09:29 AM.
    The programmer’s wife tells him: “Run to the store and pick up a loaf of bread. If they have eggs, get a dozen.”
    The programmer comes home with 12 loaves of bread.


    Originally Posted by brewbuck:
    Reimplementing a large system in another language to get a 25% performance boost is nonsense. It would be cheaper to just get a computer which is 25% faster.

  7. #7
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    The problem is that the linker cannot find the definition of punch::tokenizeString. This is because you didn't define it in the punch namespace. Add punch:: to the definition of tokenizeString.

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