llvm-for-llvmta/tools/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constinit/p2.cpp

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// RUN: %clang_cc1 -std=c++2a -verify %s
int f(); // expected-note 2{{declared here}}
constinit int a;
constinit int b = f(); // expected-error {{does not have a constant initializer}} expected-note {{required by}} expected-note {{non-constexpr function 'f'}}
extern constinit int c; // expected-note {{here}} expected-note {{required by}}
int c = f(); // expected-warning {{missing}} expected-error {{does not have a constant initializer}} expected-note {{non-constexpr function 'f'}}