Why adding `template class std::basic_string<int>;` in String.hpp doesn't work ?

readme.md

LaurentGomila/SFML Issue #5

Why adding template class std::basic_string<int>; in String.hpp doesn't work ?

It create huge amount of duplicate symbols.

patch.diff

diff --git a/include/SFML/System/String.hpp b/include/SFML/System/String.hpp
index 080a809..81e84c4 100644
--- a/include/SFML/System/String.hpp
+++ b/include/SFML/System/String.hpp
@@ -33,6 +33,9 @@
 #include <string>
 
 
+template class std::basic_string<sf::Uint32>;
+
+
 namespace sf
 {
 ////////////////////////////////////////////////////////////
diff --git a/src/SFML/System/String.cpp b/src/SFML/System/String.cpp
index b4ee135..9a529b7 100644
--- a/src/SFML/System/String.cpp
+++ b/src/SFML/System/String.cpp
@@ -30,6 +30,8 @@
 #include <iterator>
 #include <cstring>
 
+extern template class std::basic_string<sf::Uint32>;
+
 
 namespace sf
 {