llvm-project

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// RUN: cp %s %t
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// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++98
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// RUN: not %clang_cc1 -x c++ -std=c++14 -fixit %t -Werror -DFIXIT
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// RUN: %clang_cc1 -x c++ -std=c++14 %t -DFIXIT
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// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++17 -Wc++14-compat
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namespace foo1::foo2::foo3 {
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#if __cplusplus <= 201400L
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// expected-warning@-2 {{nested namespace definition is a C++17 extension; define each namespace separately}}
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#else
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// expected-warning@-4 {{nested namespace definition is incompatible with C++ standards before C++17}}
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#endif
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  int foo(int x) { return x; }
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}
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#ifndef FIXIT
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inline namespace goo::bar { // expected-error {{nested namespace definition cannot be 'inline'}} expected-warning 0-1{{C++11 feature}}
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  int n;
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}
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int m = goo::bar::n;
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#endif
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int foo(int x) {
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  return foo1::foo2::foo3::foo(x);
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}
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namespace bar1 {
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  namespace bar2 {
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    namespace bar3 {
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      int bar(int x) { return x; }
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    }
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  }
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}
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int bar(int x) {
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  return bar1::bar2::bar3::bar(x);
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}
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