24ad121582
user interface and documentation, and update __cplusplus for C++20. WG21 considers the C++20 standard to be finished (even though it still has some more steps to pass through in the ISO process). The old flag names are accepted for compatibility, as usual, and we still have lots of references to C++2a in comments and identifiers; those can be cleaned up separately.
52 lines
2.2 KiB
C++
52 lines
2.2 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++14
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// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++17
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// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++20 -Wc++17-compat
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namespace inline foo1::foo2::foo3 { // expected-error {{expected identifier or '{'}} expected-error {{use of undeclared identifier 'foo1'}}
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}
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inline namespace foo4::foo5::foo6 { // expected-error {{nested namespace definition cannot be 'inline'}}}
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}
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#if __cplusplus <= 201402L
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// expected-warning@+7 {{nested namespace definition is a C++17 extension; define each namespace separately}}
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// expected-warning@+6 {{inline nested namespace definition is a C++20 extension}}
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#elif __cplusplus <= 201703L
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// expected-warning@+4 {{inline nested namespace definition is a C++20 extension}}
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#else
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// expected-warning@+2 {{inline nested namespace definition is incompatible with C++ standards before C++20}}
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#endif
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namespace valid1::valid2::inline valid3::inline valid4::valid5 {}
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// expected-note@-1 2 {{previous definition is here}}
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#if __cplusplus <= 201402L
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// expected-warning@+3 {{nested namespace definition is a C++17 extension; define each namespace separately}}
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#endif
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//expected-warning@+1 2 {{inline namespace reopened as a non-inline namespace}}
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namespace valid1::valid2::valid3::valid4::valid5 {}
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#if __cplusplus <= 201402L
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// expected-warning@+7 {{nested namespace definition is a C++17 extension; define each namespace separately}}
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// expected-warning@+6 {{inline nested namespace definition is a C++20 extension}}
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#elif __cplusplus <= 201703L
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// expected-warning@+4 {{inline nested namespace definition is a C++20 extension}}
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#else
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// expected-warning@+2 {{inline nested namespace definition is incompatible with C++ standards before C++20}}
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#endif
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namespace valid1::valid2::inline valid3::inline valid4::valid5 {}
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// expected-note@-1 2 {{previous definition is here}}
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namespace valid1 {
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namespace valid2 {
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//expected-warning@+1 {{inline namespace reopened as a non-inline namespace}}
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namespace valid3 {
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//expected-warning@+1 {{inline namespace reopened as a non-inline namespace}}
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namespace valid4 {
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namespace valid5 {
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}
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} // namespace valid4
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} // namespace valid3
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} // namespace valid2
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} // namespace valid1
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