Behavior of the local class

Newsgroup: comp.lang.c++

Subject: Behavior of the local class

From: somenath <somenathpal@...>

Date: Thu, 2 Jan 2014 01:22:47 -0800 (PST)



I am not able to understand why the following program does not compile.

#include<iostream>

using namespace std;



template <class T >

void Fun(T t)

{

static int i = t;



class Test {

public:

Test( int t1) {

cout<<"Value = "<<i<<endl;

}

};

Test tt(t);



}





int main(void)

{

Fun<int >(5);

return 0;



}

Whenever I try to compile the program I get the following error

g++ LocalClass.cpp

/tmp/ccfEKvyT.o:LocalClass.cpp:(.text+0x2b): undefined reference to `i'

collect2: ld returned 1 exit status





But I am aware that local class can access the static local variable of enclosing function. The following program proves that as well.



#include<iostream>

using namespace std;



void Fun(int t)

{

static int i=t;



class Test {

public:

Test( int t1) {

cout<<"Value = "<<i<<endl;

}

};

Test tt(t);



}



int main(void)

{

Fun(5);

return 0;



}

This code compile fine. Then what is going wrong with template version of the program?

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