C++11 Extern Template
Explicit instantiation has no effect if an explicit specialization appeared before for the same set of template arguments. For information about c++11 support in a specific version of gcc, please see: The inline specifier cannot be used with a function or variable (since c++17) declaration at block scope (inside another function). The change to the standard lacks a corresponding change for. Clang's c++11 mode can be used with libc++ or with gcc's libstdc++.
C++11 Extern Template - Only the declaration is required to be visible when explicitly instantiating a function template, a variable template, (since c++14) a member function or static data member of a class template, or a member function template. Explicit instantiation has no effect if an explicit specialization appeared before for the same set of template arguments. The inline specifier cannot be used with a function or variable (since c++17) declaration at block scope (inside another function). Clang's c++11 mode can be used with libc++ or with gcc's libstdc++. For information about c++11 support in a specific version of gcc, please see: If an inline function or variable (since c++17) with external linkage is defined differently in different translation units, the behavior is undefined. The change to the standard lacks a corresponding change for.
C++11 Extern Template Gallery
For information about c++11 support in a specific version of gcc, please see: The change to the standard lacks a corresponding change for. Explicit instantiation has no effect if an explicit specialization appeared before for the same set of template arguments. The inline specifier cannot be used with a function or variable (since c++17) declaration at block scope (inside another function). If an inline function or variable (since c++17) with external linkage is defined differently in different translation units, the behavior is undefined. Clang's c++11 mode can be used with libc++ or with gcc's libstdc++. Only the declaration is required to be visible when explicitly instantiating a function template, a variable template, (since c++14) a member function or static data member of a class template, or a member function template.
For Information About C++11 Support In A Specific Version Of Gcc, Please See:
The inline specifier cannot be used with a function or variable (since c++17) declaration at block scope (inside another function). Only the declaration is required to be visible when explicitly instantiating a function template, a variable template, (since c++14) a member function or static data member of a class template, or a member function template. If an inline function or variable (since c++17) with external linkage is defined differently in different translation units, the behavior is undefined. The change to the standard lacks a corresponding change for.