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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. template<class T>
  6. struct bar {
  7.     struct foo {
  8.         foo () {
  9.             cerr << "bar::foo" << endl;
  10.         }
  11.         int i = 42;
  12.     };
  13.  
  14.     void baz() {
  15.         cerr << bar::FOO.i << endl;
  16.     }
  17.  
  18.     static thread_local foo FOO;
  19. };
  20.  
  21. struct far {
  22.     struct foo {
  23.         foo () {
  24.             cerr << "far::foo" << endl;
  25.         }
  26.         int i = 42;
  27.     };
  28.  
  29.     void baz() {
  30.         cerr << far::FOO.i << endl;
  31.     }
  32.  
  33.     static thread_local foo FOO;
  34. };
  35.  
  36. template<class T> thread_local typename bar<T>::foo bar<T>::FOO;
  37. thread_local typename far::foo far::FOO;
  38.  
  39. int main() {
  40.     cerr << "main" << endl;
  41.     bar<int> b;
  42.     b.baz();
  43.  
  44.     far f;
  45.     f.baz();
  46.     return 0;
  47. }
Success #stdin #stdout #stderr 0s 3292KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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main
0
far::foo
bar::foo
42
https://ideone.com/3mBIoO
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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