is there any significance of making a variable and function inline and static inside a namespace. For example consider following 2 files:
consider first header file
// header1.h
#include <string>
#include <iostream>
namespace First
{
static inline std::string s {"hi"};
static inline void print(std::string str)
{
std::cout << str << std::end;
}
}
and consider following second header file
// header2.h
#include <string>
#include <iostream>
namespace Second
{
std::string s {"hi"};
void print(std::string str)
{
std::cout << str << std::end;
}
}
Does compiler see two codes differently or they introduce similar behavior ?
>Solution :
Do not namespace variables and functions have internal linkage, like unnamed namespace ?
No, your assumption that namespace(named namespaces) variables and functions by default have internal linkage is incorrect.
Does compiler sees two codes differently or they introduce similar behavior ?
The one with thestatic keyword have internal linkage while the other(in header2.h) have external linkage.
That is, the variable s in header1.h and header2.h are distinct from each other. Similarly, the functions are also different from each other.
header1.h
namespace First
{
static inline std::string s {"hi"}; //s has internal linkage
static inline void print(std::string str) //print has internal linkage
{
std::cout << str << std::end;
}
}
header2.h
namespace Second
{
std::string s {"hi"}; //s has external linkage
void print(std::string str) //print has external linkage
{
std::cout << str << std::end;
}
}