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// RUN: %clang_cc1 -verify -std=c++23 -Wpre-c++23-compat %s
constexpr int h(int n) {
if (!n)
return 0;
static const int m = n; // expected-warning {{definition of a static variable in a constexpr function is incompatible with C++ standards before C++23}}
return m;
}
constexpr int i(int n) {
if (!n)
return 0;
thread_local const int m = n; // expected-warning {{definition of a thread_local variable in a constexpr function is incompatible with C++ standards before C++23}}
return m;
}
constexpr int g() { // expected-error {{constexpr function never produces a constant expression}}
goto test; // expected-note {{subexpression not valid in a constant expression}} \
// expected-warning {{use of this statement in a constexpr function is incompatible with C++ standards before C++23}}
test:
return 0;
}
constexpr void h() {
label:; // expected-warning {{use of this statement in a constexpr function is incompatible with C++ standards before C++23}}
}
struct NonLiteral { // expected-note 2 {{'NonLiteral' is not literal}}
NonLiteral() {}
};
constexpr void non_literal() { // expected-error {{constexpr function never produces a constant expression}}
NonLiteral n; // expected-note {{non-literal type 'NonLiteral' cannot be used in a constant expression}} \
// expected-warning {{definition of a variable of non-literal type in a constexpr function is incompatible with C++ standards before C++23}}
}
constexpr void non_literal2(bool b) {
if (!b)
NonLiteral n; // expected-warning {{definition of a variable of non-literal type in a constexpr function is incompatible with C++ standards before C++23}}
}
constexpr int c_thread_local(int n) {
if (!n)
return 0;
static _Thread_local int a; // expected-warning {{definition of a static variable in a constexpr function is incompatible with C++ standards before C++23}}
_Thread_local int b; // // expected-error {{'_Thread_local' variables must have global storage}}
return 0;
}
constexpr int gnu_thread_local(int n) {
if (!n)
return 0;
static __thread int a; // expected-warning {{definition of a static variable in a constexpr function is incompatible with C++ standards before C++23}}
__thread int b; // expected-error {{'__thread' variables must have global storage}}
return 0;
}
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